HELPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Scientists discover two populations of mice on either side of a major river.
The two populations have almost identical genes, but the mice from one side cannot breed with the mice from the other.
This is most likely because
Select one:
A. both species of mice lived on both sides but owls killed one
population on each side
B. the river separated one species of mice into two different species.
C. the similar habitat caused two species to become genetically
similar
D. two different species of mice migrated to the river from different directions
This is most likely because the river separated one species of mice into two different species, hence option B is correct.
This is an illustration of the form of speciation known as allopatric speciation, which takes place when an organism population is geographically separated from the rest of the population.
The river served as a geographical barrier in the case of the mice, prohibiting interbreeding between the two groups. The two groups may have developed through time to have distinct physical traits, such as various fur sizes or colors.
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what is the main function of cellular respiration
A. using carbon dioxide
B. releasing energy
C. producing oxygen
D. circulating blood
Answer:
B. releasing energy
Explanation:
Genetic engineers use plasmids. a plasmid is
A. a map of a gene
B. a cell that is not yet specialized
C. a small, circular piece of DNA
D. an enzyme that can cut DNA into pieces
C. a small, circular piece of DNA
A plasmid is a small, circular piece of DNA found in bacteria and other single-celled organisms. It is separate from the organism's main chromosomal DNA and can exist in multiple copies per cell. Plasmids are often used as a vector for genetic engineering. They can be easily isolated from a bacterial cell and manipulated in a laboratory. Genetic engineers use plasmids to introduce new genetic material into cells, such as genes for resistance to antibiotics or for the production of a desired protein. Plasmids can also be used to transfer genetic information between different species of organisms.
Help please i’m so confused
Answer:
The correct answer is C
Explanation:
The model shows a factory creating excess levels of C*O_{2}. This would support Scientist A's claim that the factory is responsible for the excess C*O_{2} in the atmosphere. The model illustrates that the C*O_{2} is not lost throughout the system, but is released directly into the atmosphere, and not cycled back into the ecosystem. This would indicate that the factory is the source of the excess C*O_{2} in the atmosphere.
URGENT!!!
A biology class observed that a species of cactus plant was adapted
to store water and survive in a dry climate.
Which factor is responsible for this population of cactus plants
becoming well-adapted to its environment?
Select one:
O random changes in allele frequency in every generation
O lack of genetic variation among individuals
O migration of gametes into the population
O unequal success of individuals in surviving and reproducing
Answer:
O unequal success of individuals in surviving and reproducing (natural selection)
Natural selection is the process by which certain traits become more or less common in a population over time due to the differential survival and reproduction of individuals with those traits, which leads to the adaptation of species to their environment.
You overhear dog breeders claim that when they bred two prize winning dogs, two of seven offspring suffer from ataxia, a disorder of the nervous system. How would you go about determining the pattern of inheritance of this disorder?
To determine the pattern of inheritance of ataxia in the offspring of two prize-winning dogs, a geneticist would likely conduct a variety of experiments and observations to gather data and make inferences about the underlying genetic factors. Here is an overview of some potential steps that could be taken:
Conduct a pedigree analysis: A pedigree analysis is a way to track the inheritance of a trait or disorder through multiple generations of a family. By looking at the family tree of the dogs, a geneticist can infer the pattern of inheritance of ataxia.
Study the affected offspring: The geneticist would likely study the affected offspring to determine if there are any specific characteristics or symptoms of the disorder. This could include conducting neurological exams, imaging studies, and other tests to gather information about the disorder's pathology.
Test for specific genetic mutations: The geneticist would likely conduct genetic tests to search for specific mutations in the genes associated with ataxia. This could include DNA sequencing, which can identify changes in the DNA sequence that might be responsible for the disorder.
Look for environmental factors: The geneticist would consider environmental factors that might be contributing to the disorder. This could include diet, exposure to toxins, and other factors that might be affecting the dogs' health.
Repeat the breeding: The geneticist would repeat the breeding and observe the offspring to see if the pattern of inheritance is consistent
In Palm Beach County the sugarcane farmers are burning fires to strip the plant to the stalk to make the sugar easier to harvest. This practice is changing the quality of air causing particulate pollution; meaning the air is filled with smoke, soot, and ash. This has led to adverse health effects including an increased risk of asthma. Why is it important that county officials monitor the quality of air in surrounding communities?
A. to provide topics for local governmental candidates to debate in a public forum
B. to determine ideal sites for new sugarcane farms when resources are depleted
C. to help county officials to determine what policies need to be put into place to protect residents
D.to determine how much money is needed to address any health concerns arising from the pollution
To help county officials to determine what policies need to be put into place to protect residents.
What is residents?
Residents are people who live in a certain place or area. They are permanent inhabitants who are either citizens or non-citizens of the place they live. Residents can be found in residential areas like cities, towns, villages, and other places. They often contribute to the overall character and culture of the place they live. They also influence the economic and social aspects of the area they live in. Residents usually take part in various activities and events in the community, such as shopping, dining, entertainment, and more. They often form strong relationships with one another and with the surrounding environment. Residents are important to the overall health of a community, as they contribute to its diversity, stability, and vibrancy.
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Drag and drop the words into the correct locations.(2 points)
Two astronomers accidentally discovered______, which is evidence of universe expansion that supports the Big Bang theory. This is particularly strong evidence because its temperature is ______. By observing this today, we can see what the universe looked like______?
Background radiation
137,000,000 years ago
not uniform
uniform
13,700,000,000 years ago
SOMEONE PLEASE HELP ME!!...
Two astronomers accidentally discovered Background radiation, which is evidence of universe expansion that supports the Big Bang theory. This is particularly strong evidence because its temperature is not uniform. By observing this today, we can see what the universe looked like 13,700,000,000 years ago.
What is the Big Bang theory in physics?The Big Bang Theory is a fundamental theory in the physics field that states the universe is expanding which is associated with different temperatures around space and background radiation.
Therefore, with this data, we can see that the Big Bang theory is based on temperature differences around the universe.
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What is the difference between a dominant color allele and a recessive color allele found in pea plants?
Responses
Both alleles code for proteins that produce pigments. The pigments produced by a recessive color allele are white.
A recessive color allele codes for proteins that produce pigments. A dominant allele does not code for those proteins.
A dominant color allele codes for proteins that are involved in the production of pigments. A recessive color allele does not produce a working version of these proteins.
Both alleles cannot code for any proteins. Purple is the natural color of plant petals when no other factors are involved.
Answer:
A dominant color allele codes for proteins that are involved in the production of pigments. A recessive color allele does not produce a working version of these proteins.
Explanation:
A dominant color allele produces a specific pigment when present, while a recessive color allele does not produce that specific pigment when present.
The dominant allele masks the effect of the recessive allele, meaning that if a plant has one dominant allele and one recessive allele, the dominant allele will determine the color of the plant. However, if a plant has two recessive alleles, the plant will have the color determined by the recessive allele.
In pea plants, the dominant allele codes for purple pigments and the recessive allele codes for white pigments. So when a pea plant has one dominant allele and one recessive allele it will appear purple, and when it has two recessive allele it will appear white.
jack wanted to which brand of car wax was most effective on his car paint. he tested four brands of wax
If jack wanted to which brand of car wax was most effective on his car paint. he tested four brands of wax. The experimental group is: Most expensive wax, store brand of wax and infomercial brand of wax.
What is experimental group?An experimental group can be defined as the type of group that tend to received what a researcher what to test or carryout out an a test on. Most researcher tend to make use of this group to carryout study on what they intend to study before reaching or drawing conclusion about the experiment conducted.
Based on the scenario the experimental group have to do with the following:
Wax that was the store brandWax that was the most expensive Wax that ordered from an infomercialTherefore we can conclude that the experimental group is most expensive wax, store brand of wax and infomercial brand of wax.
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The complete question is:
What is the experimental group? Jack wanted to test which brand of car wax he should use on his car to make it the shiniest. He tested three brands of wax. He cleaned the hood of his car and removed the old wax. He measured four equal sections on the hood of the car. One wax was the store brand, one was the most expensive and the last one was a type of wax that he ordered from an infomercial. The last section did not get any wax. An equal amount of wax, the same type of rag, and equal buffing were used. After he was done, Jack developed a rating scale for amount of shine, from dull to very shiny on each of the 4 squares.
4. Show a dihybrid cross for fruit flies. GgEe x GgEe. Be careful when counting the
number for each phenotype, it is easy to make a mistake.
ABSWER:
The cross between two heterozygotes (Normal wings and Red eyes) will produce 16 offspring. The number of offspring with different phenotypes are given below:
The number of flies with normal wings, red eyes is 9.
The number of flies with normal wings, sepia eyes is 3.
The number of flies with vestigial wings, red eyes is 3.
The number of flies with vestigial wings, sepia eyes is 1.
The ration of the offspring with the phenotype normal wings, red eyes : normal wings, sepia eyes : vestigial wings, red eyes: vestigial wings, sepia eyes is 9:3:3:1.
(06) A grey rat, heterozygous for both traits is mated with a black rat heterozygous for pigmentation. What are the offspring? Give the phenotypes after drawing the punnet square
Answer:
If a gray rat heterozygote (Gg) and a black rat heterozygote (Bb) were to breed, the following phenotypic and genotypic ratios would result:
ExplanatioN
Gg (Heterozygous gray rat) X Bb (Heterozygous black rat)
B b
G GB Gb
g gB gb
therefore, In offsprings, 50 % rats will be gray and 50 % rats will be black. So, both the ratios (phenotypic and genotypic) would be 50:50
Is osmosis a type of active transport or a type of diffusion?
Osmosis is a type of diffusion.
What is osmosis?Osmosis is the movement of water molecules from the region of high water concentration to the region of low water concentration through a semi-permeable membrane.
In other words, osmosis is the movement of water molecules from the region of higher water potential to the region of lower water potential through a selectively permeable membrane.
Diffusion generally involves the movement of molecules from the region of higher concentrations to the region of lower concentration. Active transport, on the other hand, are biological transports that require energy.
Thus, osmosis can be viewed as a kind of diffusion involving the semi-permeable membrane, and not a kind of active transport because it does not require energy.
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Two types of membrane protein l
Answer:
integral and peripheral.
Explanation:
What are two basic differences between DNA and RNA?
RNA is usually single stranded, while DNA is usually double stranded.
RNA contains uracil, while DNA contains thymine.
RNA is usually double stranded, while DNA is usually single stranded.
RNA contains thymine, while DNA contains uracil.
RNA doesn’t contain cytosine, while DNA doesn’t contain adenine.
Reset Next
Answer:RNA is single-stranded while DNA is double-stranded.
RNA contains uracil while DNA contains thymine.
RNA has the sugar ribose while DNA has the sugar deoxyribose.
Explanation:RNA is single-stranded while DNA is double-stranded.
RNA contains uracil while DNA contains thymine.
RNA has the sugar ribose while DNA has the sugar deoxyribose.
Many physicians initially rejected the notion that clinical laboratories could have a positive impact on the practice of
medicine because_____
They were taught in medical school to assume complete accountability for their patient's diagnosis and treatment
they didn't reject the notion; in fact doctors universally praised the development of clinical laboratories
they didn't trust new technology
they would earn far less money in their practice as a result
Many physicians initially rejected the notion that clinical laboratories could have a positive impact on the practice of medicine because They were taught in medical school to assume complete accountability for their patient's diagnosis and treatment.
What is Medical school?A medical school is a tertiary educational facility, or a division thereof, that teaches medicine and confers doctoral degrees on its graduates.
The Bachelor of Medicine, Bachelor of Surgery (MBBS, MBChB, MBBCh, BMBS), Master of Medicine (MM, MMed), Doctor of Medicine (MD), and Doctor of Osteopathic Medicine are some examples of such medical degrees (DO).
Additionally, medical schools have the ability to run teaching hospitals and conduct medical research. The standards, framework, teaching methods, and type of medical programs offered at medical schools differ significantly around the world.
Therefore, Many physicians initially rejected the notion that clinical laboratories could have a positive impact on the practice of medicine because They were taught in medical school to assume complete accountability for their patient's diagnosis and treatment.
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Hereditary elliptocytosis diagnosis and Treatment/management
Please tell me precisely
It’s a presentation
Hereditary elliptocytosis (HE) states a group of red blood cell (RBC) disorders which is an inherited disease.
What is Hereditary elliptocytosis?
Hereditary elliptocytosis is characterized by the presence of, elliptically shaped and elongated RBCs on the peripheral blood smear.
Complete blood cell count (CBC) and Peripheral blood smear are the diagnosis method for Hereditary elliptocytosis.
There is no treatment for this disorder until it becomes severe anemia, spleen removal can be observed in the treatment.
Therefore, it is a red blood cell (RBC) disorder.
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The pictures have the questions
Explain in detail how the endocrine system is reacting during these given situations to bring the body back to homeostasis or may be causing adverse physiological effects. Identify the important anatomical structures/organs involved in this situation, hormones secreted, and physiological reactions/adjustments taking place due to the Endocrine System functions.
Case Study
1) Tianna was riding her horse on a warm sunny day (101 degrees Fahrenheit). She had overdressed for the day, not knowing it was going to be this hot. She had already sweated out 1 Liter of fluids and her respiratory rate was increasing (currently at 23 breaths per minute while sitting). She was also feeling dizzy and not well.
To help the lower temperature of Tianna on a hot day, the hypothalamus, a part of the endocrine system of the body induces the production of the thyroid hormone, thyroxine, that induces sweating in order to lower the body temperature.
What is thermoregulation?
The process through which the body controls its internal temperature is known as thermoregulation. Extreme discomfort and even death could result from having a body temperature that is excessively cold or high.
The hypothalamus helps keep the body's internal functions in balance by producing hormones that help to regulate body temperature.
Sweating is one of the main ways your body regulates temperature when exposed to hot temperatures. The evaporation of sweat assists in cooling the skin. Additionally, the blood arteries feeding the skin widen, allowing warm blood to travel to the skin's surface. This aids in cooling the body's core.
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You are a clinical scientist in a hospital lab who has been given two clinical isolates from a patient. One of the isolates was initially identified as Staphylococcus aureus and the other one as Staphylococcus epidermidis. Which of the following media would you choose to confirm whether the initial identification is correct?
Answer:
Mannitol Salt Agar (MSA)
Explanation:
To confirm the initial identification of the two isolates, you would choose an identification medium that contains a combination of nutrients that are specific to Staphylococcus aureus and Staphylococcus epidermidis. The most common medium used for this purpose is Mannitol Salt Agar (MSA). MSA contains a 7.5% sodium chloride concentration and mannitol, which is a sugar that only Staphylococcus aureus can ferment. The presence of a yellowish-green color indicates the presence of Staphylococcus aureus, while the presence of a colorless halo indicates the presence of Staphylococcus epidermidis.
Which table shows a proportional relationship between X and Y?
Answer: Table 2
Explanation:
when you divide all the y's by all the x's you get 0.5 for all answers
Which properties of life are proseases by viruses and green turtles
Answer:
organization, reproduction, energy usage, and adaptation to the environment.
Explanation:
Both turtles and viruses possess various characteristics of life. While turtles possess all the characteristics associated with life, viruses only have some of them. THese are organization, reproduction, energy usage, and adaptation to the environment.
some cells in the bladder are bi-nucleated cells what process happened? What process did not happen?
Some cells in the bladder are bi-nucleated cells because occurs DNA replication without cell division.
What are bi-nucleated cells?Biological cells that contain two or more nuclei are called bi-nucleated cells and they are generated when the cell duplicates its DNA content during the synthesis S phase of the interphase but they do not undergo cell division, i.e., mitotic cell division cycles to reduce the genetic material.
Therefore, with this data, we can see that bi-nucleated cells are generated by the duplication of the DNA without the subsequent cycle of mitotic cell division.
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The age of material on a tectonic plate depends in part on what type of crust it is composed of. 1)_____ tends to be younger because it is continually produced at the
2)______ and then recycled. On the other hand, 3)_______ tends to be older because it can often remain intact for longer periods.
Fill In Blanks
1) Ocean floor
Oceanic Crust
Continental Crust
2) Deep sea Vents
Hot spots
Mid oceanic ridges
3) Continental crust
Oceanic Crust
Ocean Floor
SOMEONE HELP PLEASE AMD FAST!
Continental crust, Oceanic Crust, Lithospheric Plate The age of material on a tectonic plate depends in part on what type of crust it is composed .
What is Oceanic Crust?
Oceanic crust is the outermost layer of the Earth's lithosphere which forms the ocean floor. It is composed of mafic igneous rocks such as basalt and gabbro. It is typically 5 to 10 km thick and is the youngest layer of the Earth's lithosphere.
Oceanic crust is formed by seafloor spreading at mid-ocean ridges, which occur when two tectonic plates are pulling apart from each other. This causes molten material from the mantle to rise up and cool, forming new oceanic crust. The newly formed crust then moves away from the mid-ocean ridge in both directions, forming a diverging boundary. As it moves away from the ridge, the oceanic crust cools and becomes denser and denser.
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Describe the path and all related steps that a molecule of oxygen would take from the air in the lungs to a muscle cell
Answer:, oxygen is delivered from the lungs to the bloodstream. The oxygen attaches to the hemoglobin of red blood cells.
Explanatio. The red blood cells then transport the oxygen to cells, such as those located in your muscles.
What is the density of an object that has a volume of 6 and a mass of 30
Show the punnet square for Ss x Ss
Answer:
A Punnett square is a tool used to predict the possible outcomes of a genetic cross, it can be represented as a grid with the alleles (genes) of one parent along the top and the alleles of the other parent along the side.
When the cross is between two homozygous dominant individuals (Ss x Ss) the Punnett square would look like this:
Explanation:
| S | s
---|---|---
S | Ss | Ss
s | Ss | ss
Each box in the square represents a possible combination of alleles that could result from the cross, and the resulting genotype of the offspring. In this case, all of the possible combinations are SS, which is homozygous dominant. This means that all of the offspring will have the dominant allele (S) and will have the same phenotype (expression of the trait) as the parents.
Non-zero acceleration requires ___ over a___
Answer:
Non-zero acceleration requires a change in velocity over a period of time.
Explanation:
A measure of how rapidly an object's velocity changes is called acceleration. Since velocity is a vector quantity, it contains both a speed component and a direction component. When an object's velocity varies, either its speed, direction, or both are changing, or both are changing. The definition of acceleration is a change in velocity over time. A moving item is considered to have zero acceleration if it is travelling at a constant velocity, which indicates that both its speed and direction are remaining constant. In other words, a change in velocity over time is necessary for non-zero acceleration.
The heart appears to be divided in half,with two separate sections for receiving and pumping blood.from where does each half receive blood?To where does each half pump blood
Answer:
The heart is divided into four chambers: the right atrium and right ventricle, and the left atrium and left ventricle. The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle. The right ventricle then pumps the deoxygenated blood to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and pumps it into the left ventricle. The left ventricle then pumps the oxygenated blood to the rest of the body through the aorta.
Explanation:
16 Vitamin D is soluble in fat, but insoluble in water. It is present in the fat component of foods
that we eat.
-1
a Use this information to suggest how bile helps us to absorb vitamin D from food.
b Suggest into which part of the villi it is absorbed. Explain your suggestion.
Answer:
Explanation:
a Bile is a fluid produced by the liver that helps to break down and digest fatty foods, such as those containing Vitamin D. Bile helps to emulsify the fat in these foods, meaning that it helps to break it down into smaller droplets, which can then be more easily absorbed by the villi in the small intestine.
b Vitamin D is fat-soluble, so it is most likely absorbed into the fat-containing cells of the villi. The villi are small finger-like projections in the small intestine that have a brush-like surface, which increases the surface area for absorption of nutrients. The Vitamin D is likely taken up into the cells of the villi, from where it can enter the bloodstream and be distributed to different parts of the body.
