The arrangement of chromosomes in an oocyte in a female at birth if the species has a diploid number of 20 is 10 chromosomes, each with two sister chromatids.
What is chromosome ?Chromosomes are molecules which are made up of DNA nucleic acid and some proteins, it carry all the genetic information to be transported to next generation.
Here DNA is tightly packed and wrapped around histone proteins which form a structure called threadlike form called chromosome.
Humans have 46 chromosomes, where half of the chromosome are 23 chromosomes.
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The organisms that cause Lyme disease are able to
Answer: Change their proteins, thus making recognition by the mouse’s immune system more difficult.
Explanation:
The organisms that cause Lyme diesease are able to change their proteins, thus making recognition by the mouse’s immune system more difficult.
How many seconds are in an hour?
Answer:your answer is 3600
Explanation:
Answer:
In one hour there is 3600 seconds
An online fingerprinting kit advertises that the fingerprinting powder detects "oil" left behind by
fingertips. Is this accurate? Why or why not?
Fingerprinting powder is a method used to detect fingerprints. It sticks to oil and sweat secreted by the skin. Yes, the statement is accurate. The fingerprinting powder detects "oil" left behind by fingertips.
What is a fingerprint and how is it used in criminology?
The fingerprint is a mark of the finger skin left on different surfaces. It is called print because it leaves the exact shape and pattern of the skin ridges. This pattern is known as dermatoglyphics.
Dermatoglyphics is significant because
they are unique to each person. What is more, each finger has its own skin ridges pattern. they are permanent and do not change. The pattern is the same throughout the individual's life.
Because of these two characteristics, fingerprints are a reliable tool during a crime scene.
Fingerprints results from oily secretions and sweat produced naturally by the skin. Since these are invisible, they are not detected at simple sight.
The fingerprinting powder is a useful method to detect fingerprints on certain surfaces, making them evident. Once identified, forensics lift the prints from surfaces and take them to the laboratory for further analysis.
Because of finger secretion, oil and sweat react with the powder and make the print visible by contrast. The powder sticks to the secretions but not to the clean background, making dermatoglyphics visible when applied.
Yes, the statement is accurate. The fingerprinting powder detects "oil" left behind by fingertips.
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Describe one of the disorders discussed in the chapter including the signs and symptoms, etiology and treatment for genetic and congenital disorders
Congenital disorders are present from birth, and hereditary disorders are transmitted from parents to their children through the genes. There are many different types of congenital and hereditary orthopedic disorders, and in most cases, children respond very well to treatment.
What are the symptoms of genetic disorders?
Symptoms vary depending on the type of disorder, organs affected and how severe it is.
Genetic disorders can be:Chromosomal: This type affects the structures that hold your genes/DNA within each cell (chromosomes). With these conditions, people are missing or have duplicated chromosome material.Complex (multifactorial): These disorders stem from a combination of gene mutations and other factors. They include chemical exposure, diet, certain medications and tobacco or alcohol use.Single-gene (monogenic): This group of conditions occurs from a single gene mutation.What is treatment for genetic disorders like?
Most genetic disorders do not have a cure. Some have treatments that may slow disease progression or lessen their impact on your life.
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Which of the following would be an example of how science has impacted society?
a. Lifesaving discoveries like antibiotics
b. Conservation of resources like the rainforests
c. Technologies that have improved human lives like refrigerators, a/c and the internet
d. All of the above
Answer:
d. All of the above
Explanation:
Do all living things change the composition of the air they breathe? What is happening when living things give off substances?
The answers include the following:
All living things don't change the composition of the air they breathe as they are made of different gases which aren't separated.When living things give off substances, excretion is the process which is said to be happening.What is Excretion?This is a process which is performed by all living organisms and it involves the elimination of metabolic waste from the body system.
Examples of metabolic wastes which are eliminated from the body include carbon dioxide, excess salts etc. They are removed because building up in the body will lead to the damage of organs and if serious death mat occur in this type of scenario.
Air is composed of different gases and they aren't changed however the oxygen which is breathe in is usually more than the one which is excreted due to the body making use of it for its daily activities.
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Studies of muscle cells show that they have more mitochondria than skin cells. What conclusion can be drawn from this information?
A.
Muscle cells use more energy than skin cells.
B.
Skin cells utilize cellular respiration more efficiently.
C.
Muscle cells store more DNA than skin cells.
D.
Muscle cells use more energy than any other cells.
The conclusion from the information that muscle cells have more mitochondria than skin cells is that muscle cells use more energy than skin cells (Option A).
Why there are many mitochondria in muscle cells?The scientific reason for which there are too many mitochondria in muscle cells is that these cell need to produce a high amount of energy and mitochondria generate ATP.
In conclusion, the conclusion from the information that muscle cells have more mitochondria than skin cells is muscle cells use more energy than skin cells (Option A).
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For children who do not have galactosemia, what are their possible genotypes for this trait?
The autosomal recessive mode of inheritance for galactosemia. Galactosemia is an autosomal recessive disorder in which one normal gene and one defective gene are present in each parent of a galactosemic child.
Disruptions or a gene cause galactosemia. Galactosemia develops as a result of disruptions or alterations (mutations) in the GALT gene, which leads to a lack of the GALT enzyme. Galactosemia indications, symptoms, and clinical findings result from the abnormal accumulation of molecules connected to galactose in numerous organs of the body. when an enzyme that breaks down galactose is produced by different (mutated) genes. In order to have galactosemia, a kid must inherit two galactosemia genes, one from each parent. Galactose and its derivatives accumulate in the blood when a person has galactosemia. Cells and body parts may be harmed by this.
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What parts of the brain are being used when talking to a friend? Tell me about 4 parts of the brain that are activating, and 1 lobe (a total of 5 parts). Explain what/how they are activating when you are talking to a friend face to face.
The parts of the brain that are being used when talking to a friend include the following: Cerebrum, Broca’s area, Wernicke’s area, Arcuate fasciculus, and cerebellum.
What is a brain?
The brain is the major organ of the central nervous system that helps in the coordination of various parts of the body.
The parts of the brain that are involved during a conversation with another individual include the following:
Cerebrum: This is further divided into the frontal lobes and the temporal lobes which are responsible for speech formation during a conversation.Broca’s area: This is the area of the brain that helps to turn ideas and thoughts into spoken words.Wernicke’s area: This is the area of the brain that is concerned with understanding and processing speech.Arcuate fasciculus: This helps in the formation of words.Cerebellum: It helps in coordinating voluntary muscle movements like opening and closing your mouth during the conversation.Learn more about brain here:
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A cell's interior is considered isotonic to the surrounding fluid when:
Answer: When the solute concentrations are the same within and outside the cell.
Explanation: Isotonic is when the osmotic pressure is the same in one solution as another. In this case, on the outside and inside of the cell.
What is the function of the synovial fluid in a freely movable joint?
A. To fuse the joint
B. To cushion the joint
C. To lubricate the joint
D. To hold the joint together
Zara is using a microscope to look at some animal cells on a slide.Ahe knows that there are animal cells on the slide but when she looks through the microscope,She cannot see any cells.GIVE THREE REASONS
Previous research shows that, in humans, the pelvic opening tends to be wider in females than it is in males.
Females have broader pelvises because they have anatomical characteristics that enable childbearing.
A hypothesis is a put forth explanation for certain real-world phenomena. A scientific theory must be put to the test through experiments or observation.
A strong hypothesis must meet two essential criteria. One requirement is that it must be testable, or able to be established by the scientific method, and another is that it must be falsifiable, or have a potential opposite conclusion.
Females have broader pelvises because they have anatomical characteristics that enable childbearing. A study was conducted to see if the pelvic size is related to labor and delivery issues. Smaller-pelvic women frequently experience complications during labor, to ethnicity, age, and other demographic biases in the data.
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The change in the height of water in the straw of the model instrument is noted at regular intervals of time . Which of these best describes the function of the model instrument ?
The statement that best describe the interaction in the atmosphere, hydrosphere and biosphere is option d: A hurricane carries ocean water across the coast and damages houses of people.
What are some form of hydrosphere-atmosphere interactions?
The hydrosphere's evaporation serves as the medium for the development of clouds and rain in the atmosphere. Rain is one way that the atmosphere returns this water to the hydrosphere.
Note that the hurricane, ocean water and the cost acts as the point of interaction between the atmosphere, hydrosphere and biosphere.
Hence option D is correct.
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See full question below
Which of these statements best describes an interaction between the atmosphere, hydrosphere and biosphere? A. Strong winds blow over a lake and create ripples. B. A river flows downhill at a very high speed and uproots trees. C. The magma flowing out of a volcano blocks the movement of a river. D. A hurricane carries ocean water across the coast and damages houses of people.
Which of the following helps your circulatory
system pump blood from your feet to your
heart?
a) Density
b) Adhesion
c) Solubility
d) Thermal
It is night time. Cathy walks into her house and puts the light on
The bright light makes her pupils go smaller. This happens very quickly
(a) Cathy's pupils getting smaller is an example of a reflex action.
Write down two things which show that this is a reflex
Answer:
Explanation:
The eye becomes smaller when light is reflected on it.
The Phanerozoic eon has three eras. Match each era with the appropriate characteristic or event.
1. Paleozoic era
2. Mesozoic era
3. Cenozoic era
time of the dinosaurs
largest mass extinction in Earth's
history
sometimes called "Age of
Mammals"
1. Paleozoic Era ⇒ largest mass extinction in Earth's
history
2. Mesozoic era ⇒time of the dinosaurs
3. Cenozoic era ⇒sometimes called "Age of
Mammals"
Three eras—the Paleozoic, Mesozoic, and Cenozoic eras—make up the Phanerozoic Eon.
The Paleozoic Era is known as the era of "ancient life." Six distinct stages were split between 544 and 245 million years ago (see the Figure below). The beginning of the era was marked by a magnificent surge of new life. It's called the Cambrian explosion. The end of the time period was marked by the biggest mass extinction the planet has ever seen.During the Mesozoic, or "Middle Life," era, the Earth was home to huge species such as dinosaurs, giant reptiles, and other creatures. It spanned 252 million years ago to roughly 66 million years ago and was also known as the age of reptiles or the age of dinosaurs.Because animals were the largest during the Cenozoic era, it is known as the "age of mammals."To learn more about Phanerozoic era refer- https://brainly.com/question/996147
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Look at the photo. Describe the differences between the plants. What do you think caused these differences? Explain your reasoning.
The area inside a cell has a lower concentration of water molecules than the
area outside a cell. What role might the cell membrane play in moving the water?
A. The cell membrane will allow water to pass freely into the cell by
osmosis.
B. The cell membrane will use endocytosis to move water into the
cell.
C. The cell membrane will produce energy to move water out of the
cell.
D. The cell membrane will use active transport to force water out of the cell.
Answer:
the correct answer is A
Explanation:
The cell membrane will allow water to pass freely into the cell by osmosis, because the environment or solution in which the cell present is hypotonic
(01.03 LC)
For an object at rest, the normal force equals the gravitational force. What is the sum of these forces called?
Group of answer choices
Inertia
Potential force
Net force
Unbalanced force
If the sum of the normal force equals the gravitational force, the sum of the two forces is called the net force.
What is the sum of forces?We know that force is a vector quantity. A vector quantity is a quantity that has both magnitude and direction. The direction of the vector can be shown by a bold face diagram with an arrow above the sign of the vector.
When we have more than two one force acting together, the resultant of the two forces obtained as a sun is called the net force hence, the sum of the normal force equals the gravitational force, the sum of the two forces is called the net force.
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Various forms of bacteria
Evidence Notebook Think back to the volcanic eruption on the island. Once the lava cooled,
plants began to grow. Is this an example of a stable ecosystem? Use evidence from the discussion of
resilient and resistant ecosystems to support your answer.
Yes, this is an example of a stable ecosystem because the population of plants which is disturbed will recover again.
What is the difference between resistant and resilient ecosystem?A population in an ecosystem can survive a disturbance because of its resistance or its resilience. Resistance refers to the ability of a population to tolerate the disturbance while on the other hand, the resilience refers to the ability to recover a population after suffering from the disturbance. Stability of an ecosystem is defined as to the capability of a natural system to do self-regulating mechanisms in order to return to a steady state after disturbance occurrence of disturbance.
So we can conclude that Yes, this is an example of a stable ecosystem because the population of plants which is disturbed will recover again.
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HELP THANK YOU SO MUCH!
Kali designs a set-up to investigate germinating seeds. She fills a jar with seeds that have soaked in water.
In the jar she places a beaker that contains a solution of bromothymol blue. Bromothymol blue turns green in the presence of carbon dioxide .
She will record observations on Day 1, wait 24 hours, and record again on Day 2
Day 1 - Bromothymol blue solution blue. Soaked Seeds.
Day 2 - Bromothymol blue solution is green. Germinating seeds.
Which question has Kali MOST LIKELY ASKED as she set up this investigation?
A. Do germinating peas release oxygen in the process of respiration?
B. Do germinating peas release water in the process of photosynthesis?
C. Do germinating peas absorb water in the process of photosynthesis?
D. Do germinating peas release carbon dioxide in the process of respiration?
The increase in water level shows that respiration in the conical flask is causing gram seeds to germinate, which releases carbon dioxide. Thus, option D is correct.
What gases are released by germinating peas?The KOH solution in the little test tube absorbs the CO2 that the germination of the seeds in the conical flask releases during breathing.
As a result, a small vacuum is created inside the flask, forcing the water up the delivery tube. It demonstrates that seeds that are germination carbon dioxide during respiration.
By mixing glucose with oxygen from the air, organisms create energy during the process of respiration. Glucose and oxygen are converted into energy and carbon dioxide during cellular respiration.
During the process of cellular respiration, carbon dioxide is released into the atmosphere.
Therefore, germinating peas release carbon dioxide in the process of respiration.
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Stickleback fish are collected from a lake in Alaska. 600 from the sample are
spineless, which is a recessive trait in the fish. 80 of the fish collected have
spines. Calculate:
A. The frequency of recessive alleles in the population (q)
B. The frequency of dominant alleles in the population (p)
C. The percentage of individuals in the population that are heterozygous:
D. Provide an explanation for why so many fish in the lack display the recessive
trait
The predominant allelic frequency is the allelic frequency of the recessive gene, the genotypic frequency of homozygous dominants (p2), genotypic frequency of homozygous recessives (q2), 2pq the genotypic frequency of heterozygotes
These allelic frequencies add up to 1, so p + q = 1. Likewise, the genotypic frequencies add up to 1, so p2 + 2pq + q2 = 1.
q² = 600/680 = 0.882
We can determine the recessive allele if q2 represents the homozygous recessive genotypic frequency. by removing the equation, frequency
q= √0.882 = 0.939
We will receive both homozygous and heterozygous phenotypic frequencies.
p+ q =1
p=0.061
Knowing that 2pq is the heterozygous genotypic frequency, we can quickly compute it by substituting the following terms for:
2pq=2 x 0.061 x 0.939 = 0.115.
Directional selection increases the percentage of people who have one of severe phenotypic characteristics This trait makes people more likely to survive in particular circumstances. Additionally, genetic drift might be in play. Allelic frequencies in a population shift over many generations due to genetic drift, an evolutionary mechanism. Its impacts are more difficult to see in a small population.
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Please help me sort these !!!!
how are elements in the group in the periodic table alike?
Water's properties make it vital for life in many ways. Match the property of water to the aspect
of life that directly benefits from that property.
Adhesion and cohesion O
Universal solvent O
Expands upon freezing O
High specific heat O
O
Nutrients are absorbed into your blood from the foods you eat.
The cells in your body stay at relatively similar temperature because
they are filled with water.
Water molecules are pulled up from the roots to the leaves of a tree.
Fish and other organisms swim freely at the bottom of a lake that
has frozen over.
C
La
1.
High specific heat = The cells in your body stay at relatively similar temperature because they are filled with water.
(magic number is 37° Celsius or 98.6° Fahrenheit)
2.
Expands upon freezing = Fish and other organisms swim freely at the bottom of a lake that has frozen over
3.
Adhesion and cohesion (stickiness of water) = Water molecules are pulled up from the roots to the leaves of a tree
XYLEM is the part of the plant that does this
TRANSPIRATION or DIFFUSION is the process by which the water moves
4.
Universal solvent = Nutrients are absorbed into your blood from the foods you eat
(when you hear solvent think ice tea powder or a mix which you put in water)
9._____ is the amount of energy that must be supplied to get a chemical reaction started.
Reactant energy
Endothermic energy
Activation energy
Exothermic energy
Activation energy is the amount of energy that must be supplied to get a chemical reaction started.
What is Activation energy?The activation energy is the first and minimum amount of energy input that is used in the reaction to start it and later returned.It is denoted by [tex]E_{A}[/tex].
[tex]E_{A}[/tex] always has a positive value – independent of whether the reaction is endergonic or exergonic overall.
The primary source of activation energy is heat, which reactant molecules absorb from their environment. This heat energy jolts the atoms and bonds within the individual molecules, raising the likelihood that bonds will break, and speeds up the velocity of the reactant molecules, increasing the frequency and force of their encounters.
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Operant conditioning operates on the principle that behaviors Occur more often when they are what
Operant conditioning operates on the principle that behaviors occur more often when they are reinforced by such behavioral attitudes and conducts.
What are operant conditioning behaviors?Operant conditioning behaviors are certain attitudes in an individual that may be rewarded or punished when they are found in a repeated pattern, thereby conditioning future behavior in the individual due to the memory of such event in the past.
In conclusion, operant conditioning operates on the principle that behaviors occur more often when they are reinforced by such behavioral attitudes and conducts.
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All of the following statements are true about STI'S EXCEPT:
A. Hepatitis B can cause jaundice.
B. Syphilis affects the brain and central nervous system.
C. Using a condom can protect against all STI's.
D. Gonorrhea and chlamydia can be successfully treated with antibiotics.
Answer:
A.Hepatitis B ca cause jaundice
