Thin contractile protein that are involved in the formation of crosslinks and exist in fibrous or globular form is actin.
What is the function of actin and its location?Actin is a highly abundant intracellular protein present in all eukaryotic cells and plays an important role in muscle contraction and cell movement. Actin also participate in maintaining and controlling cell shape and structure.
Actin is found in both the cytoplasm and nucleus. Its position is regulated by a cell membrane signaling pathway that integrates stimuli received by the cell and stimulates reorganization of the actin network in response.
What two proteins are contained in actin?Increased Ca2+ concentrations signal muscle contraction through the action of two accessory proteins bound to actin filaments: Tropomyosin and Troponin. Tropomyosin is a filamentous protein that binds longitudinally along the grooves of actin filaments.
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growth hormone deficiencies are often treated by therapeutic administration, which of the following conditions would benefit from growth hormone injection?
Muscle wasting illness is just a disorder that is frequently addressed by therapeutic administration with growth hormone.
How do hormones work?Hormones are used by the body as chemical messengers. They go via your bloodstream and into tissues or organs. They gradually take impact over time that influence many processes, notably development and growth. The body uses metabolic to turn food into energy.
What alter a girl's hormonal balance?FSH and LH specifically target the ovaries in females, that have been home to eggs since conception. As a result of the hormones, oestrogen production in the ovaries is stimulated. A girl's body develops and becomes ready for pregnancy thanks to estrogen, FSH, and LH.
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which descibes the motion of the plates
Answer: The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
Answer:
a rotation about a virtual axis that passes through the center of the sphere (Euler's theorem)
Explanation:
What is invitro fertilization ?
Explanation:
In vitro fertilisation is a process of fertilisation where an egg is combined with sperm in vitro. The process involves monitoring and stimulating an individual's ovulatory process, removing an ovum or ova from their ovaries and letting sperm fertilise them in a culture medium in a laboratory.
The three main approaches to IVF that involve no or fewer drugs are natural cycle IVF, mild stimulation IVF and in vitro maturation (IVM).
its risk include miscarriage, multiple births, premature delivery and low birth weight.
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Is to photosynthesis as is to cellular respiration?; How are photosynthesis and cellular respiration related in oxygen?; In which process cellular respiration or photosynthesis is oxygen a reactant?; What is oxygen to photosynthesis?
Cellular respiration is the process by which glucose is broken down into simpler compounds in order to release the stored energy.
The final electron acceptor in aerobic cellular respiration is oxygen. Photosynthesis produces glucose and oxygen, which are required in cellular respiration.
Photosynthesis is the process by which carbon dioxide and water are converted into oxygen and glucose. The plant consumes glucose as food and produces oxygen as a byproduct.
Cellular respiration is the process through which oxygen and glucose are converted into water and carbon dioxide. Water and carbon dioxide are byproducts of the process, while ATP is the energy that is produced.
During photosynthetic electron transport, oxygen (O2) is produced when water is divided by the oxygen-evolving complex to deliver protons and electrons to the chloroplastic electron chain, resulting in the production of ATP and NADPH—the energy source and electron transporter.
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the features of....... are: instinctive component; houses biological urges; immediate gratification; irrational; pleasure principle
The instinctive desires of the pursuit of pleasure are opposed by this reality principle. To satisfy cravings without seeking immediate fulfillment.
The id, ego, and superego are three elements of the psyche that develop at different times during our lives, according to Freud's personality theory (1923). These are neither physical or brain-related parts, but rather systems. The id, according to Freud, is the main element of personality because it is the origin of all psychic energy. The principle, which aims for instant fulfilment of all needs, wants, and desires, is what motivates the id. The instinctive desires of the pursuit of pleasure are opposed by this reality principle. Human personality is multifaceted and contains multiple components, according to Sigmund Freud. The principle, which aims for instant fulfilment of all needs, wants, and desires, is what motivates the id. 1 A condition of worry results if these requirements are not met right away.
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based on what you know about the origin of life, select all of the correct statements from the following list.
Origin of life :- Non-green, most likely anaerobe, organisms were the first to appear on Earth.
The earliest creatures were probably very similar to coacervates. These microorganisms are collectively referred to as heterotrophic anaerobes. These bacteria had to be anaerobic, which means they did not breathe oxygen, because there was essentially no oxygen in the environment at the time. Heterotrophs are essentially organisms that cannot produce their own food, hence the name "other feeders." Therefore, the term "heterotrophic anaerobes" refers to organisms that did not breathe oxygen but instead consumed some naturally existing food.
The chemoautotrophs, which never emitted oxygen, were the first autotrophic creatures. Chemotrophs are creatures that get their energy from oxidizing the environment's electron sources.
The concept of spontaneous genesis holds that live things could appear miraculously from inanimate matter. The concept of spontaneous genesis holds that live things could appear miraculously from inanimate matter.
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Full Question Here
Following are the two statements regarding origin of the life.
(a) The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
(b) The first autotrophic organisms were the chemoautotrophs that never released oxygen.
Of the above statements which one of the following options is correct?
a genome has equimolar amounts of all four bases. a restriction enzyme with a five-base recognition sequence would cut, on average, once every bases.
Equimolar levels of each base are present in a genome. In average, a restriction enzyme would cut one in every 1024 bases if it had a five-base recognition sequence.
What is the genome of a human?The human genome is made up of 23 pairs of chromosomes that are found in the cell's nucleus and one tiny chromosome that's also found in the mitochondria.
What are the 3 types of genomes?As we discovered in the preceding example, there are three genome types that exist since the mutation is A–G: AA, AG, and GG. The GG type of these three genome types has the most anti-alcohol action, while the AA type has the least anti-alcohol activity that can.
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list 4 differences between archaea and bacteria; difference between archaea and bacteria; do prokaryotes have a nucleus; prokaryotes examples; archaea differ from bacteria in that archaea ; does archaea have a nucleus; do prokaryotes have membrane-bound organelles; are archaea prokaryotes
Archaea and Bacteria are two kinds of microorganisms that fall under the category of prokaryotes.
Archaea and Bacteria do not possess membrane-bound organelles or a nucleus.
The cell wall in the archaea is made up of false-peptidoglycan, whereas in bacteria, it is made up of either Lipopolysaccharide or Peptidoglycan. Archea performs a modified form of glycolysis and citric acid cycle. bacteria perform glycolysis and citric acid cycle.Cell membrane in archaea is Ether-linked lipids and in bacteria, it is Ester-linked lipids.Bacterial DNA called the nucleoid are a twisted thread-like mass.know more about archaea here: https://brainly.com/question/13310069
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Mention and explain the 4 types of conflict
There are four fundamental categories of conflict: conflict with oneself, conflict with others, conflict with the environment, and conflict with the supernatural. The conflict a lead character faces internally, or their struggle, is frequently the most potent.
What are the four categories of workplace conflict?Status conflict, task conflict, process conflict, and relationship conflict are the four categories of workplace conflict, according to Amy Gallo, author of the Harvard Business Review Guide to Managing Conflict at Work.
Which of these 4 conflict kinds are they?
The conflict in a story, which serves as the opposing force, typically falls into one of four categories: conflict with one's own nature, conflict with people, confrontation with the environment, and conflict with supernatural forces.
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All cells contain ion pumps that use the energy of ATP hydrolysis to pump ions across the plasma membrane. These pumps create an electrochemical gradient across the plasma membrane that is used to power other processes at the plasma membrane, including some transport processes. In animal cells, the main ion pump is the sodium-potassium pump.
-OUTSIDE CELL B. ([Na+]low, [K+]high) or ([Na+]high,[K+]low
C. (excess + charge) or (excess - charge)
-(BETWEEN) A. (3[Na+]v,2[K+]^)，（2[Na+]^,3[K+]v), (3[Na+]^,2[K+]v)
-INSIDE CELL D. ([Na+]low,[K+]high) or ([Na+]high,[K+]low)
E. (excess + charge) or (excess - charge)
B.[Na+]high [K+]low C. excess + charge
A. 3 Na+ ^ 2 K+ v
D. [Na+]low [K+]high E. excess - charge
-Active transport by the sodium-potassium pump follows this cycle.
1. Three Na+ ions from the cytosol bind to the pump.
2. The binding of Na+ stimulates the phosphorylation of the pump protein by ATP.
3. Phosphorylation causes a conformational change in the pump that moves the three Na+ ions against their concentration gradient and releases them outside the cell.
4. The release of the Na+ ions permits two K+ ions from outside the cell to bind to the pump, and the phosphate group is released.
5. Release of the phosphate group causes another conformational change in the pump. 6. The conformational change in the pump moves the two K+ ions against their concentration gradient and releases them into the cytosol.
The net result is that the concentration of Na+ is higher outside the cell and the concentration of K+ is higher inside the cell. In addition, one more positive charge has been transported out of the cell than into the cell, leaving the outside of the cell with an excess positive charge and the inside with an excess negative charge. Thus, the sodium-potassium pump creates both chemical gradients and charge differences across the plasma membrane.
The function of the sodium-potassium pump in animal cells (and the proton pump in bacteria and plant cells) is essential to many cell functions. It prevents chemical and electrical gradients across the plasma membrane from reaching equilibrium (at which point the cell would be dead) and powers many types of active transport across the plasma membrane.
All cells contain ion channels, which use the energy of ATP hydrolysis to pump across the plasma membrane, facilitating diffusion.
Easier diffusion of polar pumps and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, cross the plasma membrane. 3 sodium will move from inside to outside, while 2 potassium will move from outside to inside. This movement is done to maintain a gradient across the membrane. Due to ion movement, sodium ions will become higher outside the cell, while potassium ion concentration decreases. Due to 3 sodium the outward movement of the change became positive (+). ion movement the concentration of sodium ions will become lower inside the cell while the concentration of potassium inside will increase. This change decreases the charge therefore the charge inside the membrane becomes negative (-).
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which of the following populations should take precautions to maintain hydration in warm environments because their sweat rates are much lower in general?
Adolescent populations should take extra efforts to stay hydrated in hot situations since they often perspire far less than adults do.
Why are precautions necessary?Standard safety measures are designed to lessen the danger of spreading demon's souls and other diseases from both known and unknown sources. These are the fundamental measures of infection control that must be taken, at the very least, when caring for all patients.
What does the word "precaution" mean?Advance preparation: foresight stressed the need for prudence. : an action made in advance to stop damage or ensure a good: safeguard. adopt the appropriate safety measures.
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a motor end plate is defined as one motor neuron plus all of the muscle fibers that it innervates (controls).
A motor unit is the aggregate of a single motor neuron and all of the muscle fibers that it innervates.
Motor End Plate:-
Motor endplates (MEPs) are significant anatomical and functional junctions between skeletal muscle fibers and motor neurons. Motor neurons send electrical impulses to MEPs, which then produce endplate potentials and cause muscle contractions.
End of Motor Neuron:-
The motor end plate is a specific area of the muscle fiber sarcolemma located across the synaptic cleft from the synaptic end bulb (postsynaptic membrane). Each muscle fiber has one neuromuscular junction, which is normally found close to the middle of the fiber.
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Genysys, a technology services provider, has been experiencing losses in some of its regional offices for the past few months. As a result, it closes some offices and downsizes its workforce. It is also offering early retirement packages to its senior employees so that they may consider retiring at an early age. In the given scenario, Genysys is using a _____.
a stability strategy
b diversification strategy
c growth strategy
d reduction strategy
It thus reduces its employees and closes several offices. In order to encourage senior employees to think about retiring early, it is also providing early retirement packages to them. Genysys is employing a reduction strategy in the described situation.
Which of the following claims about a narrative job analysis is accurate in the context of job analysis techniques?Because the narratives in a work analysis are frequently individualized, it might be challenging to compare the duties of other jobs.
What factors influence employee turnover and how does it affect the company?High employee turnover is expensive and can harm your company. Lack of communication, encouragement, and a negative workplace culture all contribute to high turnover.
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When blood levels of glucose, amino acids, and insulin are high, and glycogenesis is occurring in the liver, the body is in the ______ state.a) stressb) fastingc) bulimicd) absorptivee) post-absorptive
When blood levels of glucose, amino acids, and insulin are high, and glycogenesis is occurring in the liver, the body is in the d) absorptive state.
Glycogenesis is the process by which glycogen is produced from the extra glucose that is present inside the blood in order to store it.
The absorptive state of the body can be described as the state in which compounds such as glucose, insulin, etc are present in high amounts in the blood and hence are absorbed by various organs and stored for future use.
During the absorptive phase the liver and the muscle cells absorb glucose from the blood and change it to glycogen by the process of glycogenesis so that it can be used by the body when the glucose level falls short in blood.
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Using the pictures below answer these questions:
1) What can you say about its evolutionary relationship? In other words what type of creature is it? Be as detailed as possible and classify it to as low a level as possible. How can you tell? What physical features give you an evidence of the species. Remember the comparative osteology slides, they will help.
2) What about the teeth? What type of functional dentition does the species have? What else can it tell you about the species?
3) Do you believe this is an adult or child?
4) Pretend you found two of these species, however one was much larger than the other. How would you explain this?
5) By looking at the post cranial bones (those other than the skull and mandible) what can you determine about the locomotion of the species?
It should come as no surprise that biologists also divide species into many categories by assessing how similar and distinct things appear to be. The underlying premise is that biological relationships are closer when there is a higher degree of physical similarity.
believe this is an adult .The vertebral column, ribs, and sternebrae, which are "on" the midline, and appendicular components, which include the forelimbs, hindlimbs, pectoral and pelvic girdles, which are "off" the midline, make up the postcranial skeleton, which is comprised of all the bones and cartilages caudal to the head skeleton.The environment is in a whirlwind with all living things. The organism develops a certain kind of biological relationships with respect to resources; some organisms compete with one another while others depend on one another for survival. These traits are broken down into four categories: parasitism, commensalism, predation, and mutualism. Both organisms profit from a symbiotic relationship.
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click and drag each word or phrase into the appropriate category to which it pertains. liver gallbladder
Although the liver has several functions, processing the nutrients ingested through the small intestine is its main responsibility in the digestive system. The liver releases bile into the small intestine, which is necessary for the breakdown of fat.
The human body's digestive system is made up of the gastrointestinal tract and other digestive organs (the tongue, salivary glands, pancreas, liver, and gallbladder). Food must be broken down during digestion into progressively smaller pieces before it can be absorbed and assimilated into the body. The digestive process is divided into three phases: cephalic, stomach, and intestinal. Beginning with the gastric phase, the second stage of digestion begins. Incorporating the track.
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which of the following particles are not filtered out of the blood in the glomerulus? group of answer choices nutrients nitrogenous wastes salts plasma proteins water
According to the claim, the glomerulus does not filter plasma protein particles from the blood.
The glomerulus where are you?Your kidneys eliminate waste and extra fluid from your body. Through nephrons, glomerulus filters in the kidneys. A network of tiny blood arteries called glomeruli, which are housed in a fluid - filled sac Bowman's capsule, are found within each nephron.
What are the glomerulus' three functional components?By keeping the vital plasma proteins from the blood and ensuring selective membrane technology, the kidneys glomerulus maintains its function. A fenestrated endothelium, GBM, and podocytes make up its three main parts, which together make up its glomerular filtration system.
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part a put the steps of the process of signal transduction in the order they occur: 1. a conformational change in the signal-receptor complex activates an enzyme. 2. protein kinases are activated. 3. a signal molecule binds to a receptor. 4. target proteins are phosphorylated. 5. second messenger molecules are released. put the steps of the process of signal transduction in the order they occur: 1. a conformational change in the signal-receptor complex activates an enzyme. 2. protein kinases are activated. 3. a signal molecule binds to a receptor. 4. target proteins are phosphorylated. 5. second messenger molecules are released. 1, 2, 3, 4, 5 3, 1, 2, 4, 5 1, 2, 5, 3, 4 3, 1, 5, 2, 4
The correct steps for the signaling process are:
Signaling molecules bind to receptors.This binding event triggers a conformational change in the signal receptor complex that activates the enzyme.As a result of this enzymatic activation, protein kinases are activated.Activated protein kinases then phosphorylate target proteins.Phosphorylation of these target proteins releases second messenger molecules that can further transmit the signal.The correct order therefore is:
3, 1, 2, 4, 5
Signal transduction is the process by which a cell receives and responds to external signals. It begins when a signal molecule (such as a hormone or neurotransmitter) binds to a specific receptor on the surface of the cell. This binding event causes a conformational change in the structure of the receptor, which activates an enzyme within the receptor complex.
Activated enzymes, known as protein kinases, can then phosphorylate target proteins within the cell. Phosphorylation is a chemical modification that involves the addition of a phosphate group to a protein. It can alter the activity or function of the protein, and can be used to transmit signals within the cell.
The phosphorylation of target proteins can also lead to the release of second messenger molecules, such as cyclic AMP or inositol triphosphate. These molecules can diffuse through the cell and interact with other proteins, amplifying the signal and allowing it to affect a wider range of processes within the cell.
Overall, the process of signal transduction involves the reception and amplification of signals from the outside environment, leading to a variety of cellular responses.
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if a method with the same signature is declared in both the base and derived classes, which keyword is used in the derived classes to properly hide the method in the base class question 2 options:
Classes in the Java programming language can derive from other classes, inheriting their fields and methods in the process.
When a method in a subclass of a class has the same name and type signature as a method in its superclass, the subclass method is said to override the superclass method in a class hierarchy. Method overriding happens when a subclass(derived class) offers a specific implementation of a method declared by one of its parent classes. If a static method defined by a subclass has the same signature as a static method defined by a superclass, then the method in the subclass hides the one in the superclass. One method used by Java to create Run Time Polymorphism is method overriding.
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A gene that influences coat color in domestic cats is located on the X chromosome. A female cat that is heterozygous for the gene (XBXO) has a calico-colored coat. In a genetics experiment, researchers mate a calico-colored female cat (XBXO) with an orange-colored male cat (XO) to produce an F1 generation. The researchers record observations for the cats in the F1 generation and plan to use the data to perform a chi-square goodness-of-fit test for a model of X-linked inheritance. The data for the chi-square goodness-of-fit test are presented in Table 1.
The researchers calculate a chi-square value of 4.6 and choose a significance level of p=0.05. Which of the following statements best completes the chi-square goodness-of-fit test?
answer choices
The null hypothesis can be rejected because the chi-square value is greater than the critical value.
The null hypothesis can be rejected because the chi-square value is less than the critical value.
The null hypothesis cannot be rejected because the chi-square value is greater than the critical value.
The null hypothesis cannot be rejected because the chi-square value is less than the critical value.
The answer that refers to a gene on the X chromosome that affects domestic cat coat colour is accurate is Because the chi-square value is below the crucial value, the null hypothesis cannot be ruled out.
Male kittens always inherit from their mother both colour genes. Due to the following, 4 out of 5 orange tabbys are male: Male cats (XY) only require the orange gene from their moms to be orange-colored due to the X chromosome (XX).Each parent contributes one colour gene to a female cat.Tri-color cats (also known as calicos) nearly usually have two X chromosomes, which is required to produce the tri-colored coat.The father of a white cat must also be white.It is impossible for two parents of a recessive colour (such as blue or cream) to have a child who is a dominant colour (black, red, etc.).Since every red/orange cat carries the agouti gene, they are characterised by tabby markings. This implies that a solid orange feline has never existed and will never exist.Cats have 38 chromosomes in total, divided into 19 pairs. Humans have 46 chromosomes overall, but dogs have 78. However, there is no relationship between complexity or intellect and the number of chromosomes. For instance, certain kinds of ferns have more than 1200 chromosomes, while potatoes have 48 more than humans have.
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Answer:
The null hypothesis cannot be rejected because the chi-square value is less than the critical value.
Explanation:
the preganglionic fibers of the parasympathetic nervous system originate in thoracic and lumbar vertebrae while those of the sympathetic nervous system originate in brainstem nuclei and sacral vertebrae. t/f
The Edinger-Westphal nucleus produces parasympathetic preganglionic nerve fibers that innervate the ciliary ganglion, which in turn supplies the ciliary muscle (which aids in near vision accommodation) and the pupillary constrictor muscle.
Since cholinergic preganglionic neurons release acetylcholine (Ach) at the ganglion synapse, sympathetic and parasympathetic preganglionic neurons share this property. Postganglionic neurons are also cholinergic in the parasympathetic system.
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Scientists believe that 250 million years ago ________.
A
the continents were farther apart
B
the continents were underwater
C
there was only one active volcano on Earth
D
the continents were connected
Answer:
D
Explanation:
the continents were connected
Which of the following is not included in basis of classification?
Body color is not a suitable basis for categorisation. Prokaryotes and Eukaryotes are classified based on the nucleus's structure. Unicellular and Multicellular organisms, and Autotrophs and Heterotrophs, according to the manner of nourishment.
What characteristic is not cited as the classification's foundation?Animal classification does not rely on locomotion as a primary characteristic. The criteria for classification are: Cell type (Eukaryotic or prokaryotic).
What are the four underlying categories?The various classification methods for statistical data include geographic, chronological, qualitative (simple and manifold), and quantitative or numerical. The ideal response is SHAPE.
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Which of the following substances can be metabolized for ATP production?
Glucose
Iron
Insulin
Vitamin C
Among given nutrients, glucose can be used to create ATP. In addition to anaerobic conditions, cellular respiration, beta-oxidation, ketosis, lipid, and protein catabolism can all result in the synthesis of ATP when oxygen is present.
Two molecules of ATP are hydrolyzed for every molecule of glucose to give energy for the early processes, but four molecules of ATP are created in the later phases. As a result, towards the end of glycolysis, there is a net gain of two ATP molecules for each glucose molecule that was broken down. A glucose molecule, with the chemical formula C6H12O6, carries a small enough package of chemical energy for cells to move and absorb. The "deliverable" kind of energy in your body is glucose, which is transported to each of your 100 trillion cells through capillaries in your blood. Since glucose is also a carbohydrate made during photosynthesis, it serves as almost everyone's primary source of nutrition.
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during the first year of an infant's life, the main cause of death are congenital abnormalities and .
the number of newborn death under one year old, Asphyxia, premature delivery, and birth traumas,lower birth weight are the three leading causes of mortality within the first week of life.
The main causes of neonatal fatalities include preterm delivery, intrapartum-related issues (birth asphyxia as well as inability to breathe at birth), infections, and birth abnormalities. Despite years of study, SIDS is still the greatest cause of death for infants between the ages of one month and one year. However, the incidence of SIDS could be significantly decreased. Most importantly, infants under 1 year old should never be put to sleep on their stomachs as well as on their sides; they should always be placed onto their backs. Unintentional injuries caused by accidents are the number one killer of children and teenagers. 0 to 1 year: Genetic and developmental issues that existed at birth.
(Which of the following is a major cause of death among infants and children?)
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This molecule consists of a
carbon bonded to an OH group.
Which functional group is
shown in this image?
A. a hydroxyl group this
C. a methyl group
B. a phosphate group
D. an amino group
www
Compression of lumbar spinal nerves could significantly affect gait. Which of the following muscles would NOT be affected during this occurrence? rectus femoris iliacus vastus lateralis piriformis
In a human, the T12, L1, L2, L3, and L4 spinal nerves give rise to the lumbar plexus. The femoral nerve, obturator nerve, and lateral femoral cutaneous nerve are the three primary nerves that the plexus forms.
A lumbar spinal cord injury may result in paraplegia with functional independence, partial or complete loss of sensation below the injury site, and the requirement for a manual wheelchair, among other things. The lumbosacral trunk, which connects the sacral plexus with a portion of the L4 root and L5 root, is created.
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if mendel crossed round yellow seeds with wrinkled green seeds, every individual in the f1 generation had seeds that were
Mendel crossed round yellow seeds with wrinkled green seeds, each individual of the f1 generation had seeds that were round yellow seeds. This is the Dihybrid Cross experiment.
Mendel crossed round yellow seeds with wrinkled green seeds. Predict the cross test results of these F1 plants.Mendel peas crossed with round yellow seeds with wrinkled green seeded peas. All F1 plants had round and yellow seeds. For example, he crossed pea plants with round, yellow seeds and plants with green, wrinkled seeds. Only the dominant traits (yellow and round) appeared in the F1 progeny, but all trait combinations were observed in the autogamous F2 progeny. The properties were present in a 9:3:3:1 ratio.
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The gas laws summarize the relationships between the parameters pressure, volume, temperature, and ___ of gas.
The correlations between the variables pressure, temperature, volume, and amount of gas are encapsulated in the gas laws.
The three fundamental gas laws show how pressure, volume, temperature, and amount of gas are related. According to Boyle's Law, as pressure lowers, gas volume increases. A gas increases in volume as its temperature rises, according to Charles' Law.
Gas laws are significant because they may be used to theoretically calculate the characteristics of a mass of gas. The ideal gas equation, for instance, may be used to determine the temperature of an ideal gas if its pressure and volume are known.
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Chose a b c or d
21. Pollen grains are produced by
a.male reproductive structures.
b. flowers.
c. female reproductive structures. d. ovules.
22. Which of the following is the only tissue that produces new plant cells?
a. phloem
b. ground tissue
c. xylem
d. meristematic tissue
23.A period of dormancy can allow seeds to germinate
a. under poor conditions.
b. without water.
c. under ideal conditions.
d. in extreme
temperatures.
24.What might a thin tree ring indicate?
a. decreased production of phloem
b. xylem production in winter
c. a year of drought
d. increased production of xylem
25. Cytokinins differ from auxins in that cytokinins
a. cause seeds to remain dormant.
b. inhibit lateral bud growth.
c. cause leaves to fall.
d. inhibit elongation of cells
26. Minerals from the soil move into roots by
a. transpiration.
b. root pressure.
c. active transport.
d. diffusion.
27. The first plants evolved from
a. mosses.
b. photosynthetic prokaryotes.
c. a protist that lived on land
. d. an organism
similar to multicellular green algae.
28. In angiosperms, reproduction takes place in
a. flowers.
b. cones.
c. leaves.
d. pollen.
29. A plant is a(an)
a. multicellular prokaryote
. b. unicellular prokaryote.
c. unicellular eukaryote.
d. multicellular eukaryote.
31.
The tough outer layer of a seed is called the
a. nut.
b. seed coat.
c. fruit. d. embryo wall.
32. Plants can respond to changing environmental conditions by the use of which chemicals?
a. hormones
b. enzymes
c. pigments d. sugars
33. A seed that is dispersed to an area far away from the parent plant might face less
a. germination.
b. alternation.
c. pollination.
d. competition.
34. Hormones that stimulate cell elongation and are produced in the rapidly growing region near
of the plant's root or stem are called
a. cytokinins.
b. ethylenes.
c. auxins.
d. gibberellins.
35.Which of the following is NOT a characteristic of all plants?
a. produce seeds
b. are eukaryotic
c. have cell walls
d. are multicellular
36. Seeds dispersed by animals typically are contained in
a. thin coatings that are easily digested.
b. fleshy, nutritious fruits.
c. lightweight structure
d. unripened ovaries
Answer:
1. B, Angiosperm pollen is produced in the anther
2. A, Vascular cambium produces secondary xylem (toward the center of the stem or root) and phloem (toward the outside of the stem or root), adding growth to the diameter of the plant. This process produces wood, and builds the sturdy trunks of trees.
3. A, A meristem is a region of undifferentiated cells from which new cells arise through cellular division.
4. D, Propagation is the breeding or making of offspring in plants or animals. Vegetative propagation can be described as the process of making new plants from a part (stems, leaves, or other structure) of the parent plant.
5. A, Auxins are primarily produced in areas that are experiencing rapid growth such as shoot tissue, young leaves and developing seeds.
6. D, The mechanism in which seeds are prevented from germination during a particular condition is called seed dormancy. In this stage, the seeds are entering a state where it is alive but there is an absence of growth and development.
7. C, Monocots have usually collateral vascular bundles, a type that is also called closed.
8. C, In the typical flowering plant, or angiosperm, seeds are formed from bodies called ovules contained in the ovary, or basal part of the female plant structure, the pistil.
9. A, Primary growth occurs at the apical meristem (a meristem located at the tip of a stem). A meristem is a region of undifferentiated cells from which new cells arise through cellular division. Secondary growth is an increase in thickness or girth of the plant body due to activity of lateral meristems.
10. C, The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.
these answers are for another post i saw of yours, copy and paste to save it just in case this gets deleted
