Which is moved by transport proteins? please help
water
carbon dioxide
oxygen
calcium
Calcium is moved by transport proteins across cell membranes, while water, carbon dioxide, and oxygen can pass freely without such assistance.
Among water, carbon dioxide, oxygen, and calcium, calcium is the molecule that is moved by transport proteins across cell membranes. Water, carbon dioxide (CO2), and oxygen (O2) can move freely through cell membranes due to their small size and the nature of the lipid bilayer. However, calcium ions, which are charged particles, cannot easily pass through the plasma membrane without assistance. They require specific carrier proteins to facilitate their movement, often in a process that involves changes in the shape of the transport protein. This can be a passive process, as in facilitated diffusion, or an active process that requires energy, commonly in the form of ATP or an existing gradient of other ions or molecules.
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Grasses can withstand the fires common to grasslands because grasses _____.
are full of moisture
store water in their leaves
grow thickly together
have extensive root systems
Domain is a newer portion of the classification system that includes Eukarya and Prokarya. What information most likely dictated that this new level be created? New data about the geographic location of organisms New data about evolutionary relationship between organisms New data about the behavior and interactions of organisms in the wild New data about the physical appearance of organisms
B is the right answer for e2020
New data about evolutionary relationship between organisms
Explanation;Classification involves grouping based on their similarities and differences. The most useful way of classifying organisms is by use of evolutionary relationships which results to an organized classification of organisms.Knowledge on evolutionary relationships about different organisms has greatly changed over time and therefore relationship among organisms, grouping of organisms has continually been revised as a result of availability of new information concerning organisms.Therefore, it is this new data or information about evolutionary relationships among organisms that prompted revision and it was seen necessary to add a level in the hierarchy of classification.Plasmodium are they heterotroph, autotroph or both
After a fire in an isolated farmhouse, firefighters found several small propane tanks and other strong evidence of a recently abandoned "meth lab." if what the firefighters found was a "meth lab," we would say:
Suppose that goats have one gene that codes for color, where a is brown and a is white. the goats also have another gene that codes for height, where b is tall and b is short. if these two genes are unlinked, what is the probability that a cross between aa bb × aa bb parents will produce two out of six offspring that are brown and short? enter your answer as a decimal, rather than as a percentage.
The probability that a cross between aa bb imes aa bb parents will produce two out of six offspring that are brown and short is 0.0156.
In order to solve for the probability of obtaining a specific number of offspring with certain traits, we need to use the binomial probability formula. Since the traits are unlinked, the probability of an offspring being brown (aa) and short (bb) is the product of their separate probabilities. The probability of an offspring being brown (aa) is rac{1}{4}, as both parents are aa, and the offspring must inherit an a allele from each parent. Similarly, the probability of an offspring being short (bb) is also rac{1}{4}. Thus, the individual probability for an offspring to be both brown and short is (rac{1}{4}) imes (rac{1}{4}) = rac{1}{16}. To find out the probability of having exactly two such offspring out of six, we apply the binomial probability formula inom{n}{k}p^k(1-p)^{n-k}, where n is the total number of offspring (6), k is the desired number of offspring with the traits (2), p is the probability of one offspring having the traits (rac{1}{16}), and 1-p is the probability of one offspring not having the traits (rac{15}{16}). Plugging in the values we get inom{6}{2}(rac{1}{16})^2(rac{15}{16})^4, which calculates to 0.0156.
True or false: all animals sense and respond to the environment
Hemophilia is an x-linked recessive trait. in a family, the mother knows she is a carrier and the father does not have the disease. the family is expecting triplets. they are worried about having boys that would have 50% chance of being affected. what is the probability of having one or more than one boy? consider two scenarios: if the triplets are monozygotic and if the triples are trizygotic
Which cell technology was made possible by the development of micromanipulation tools
One of the cell technologies that was made possible by micromanipulation tools is reproductive cloning.
Reproductive cloning is a form of artificial reproduction using the cloning technique. It is distinguished from therapeutic cloning or, more properly, cloning for therapeutic purposes.
There are two cloning methods that could be considered for human reproduction: cloning by cleavage of a blastocyst, and cloning by transfer of a cell nucleus into an enucleated ovum.
Why do you think so many dogs die from bloat? what factors influence the mortality rate of this disease?
Answer:
Many dogs die from swelling because they need medical attention as soon as possible and their owners cannot reach the vet in less than 30 minutes. These dogs will need surgery, but surgery does not always work, which influences the high mortality rate of this disease.
Explanation:
Abdominal bloating is a condition characterized by abnormal fluid accumulation in the cavity of the dog's abdomen. This disease, when not treated quickly, can progress to something more severe and pressure the diaphragm, causing difficulty breathing. But what is really worrying is the disorder that is causing this signal, since the accumulated fluid in the abdominal cavity can come from the internal organs, blood vessels or lymph nodes.
Abdominal bloating is a disease that has a high mortality rate in dogs, because the animal needs veterinary care as soon as possible and most dog owners cannot reach the vet in less than 30 minutes. In addition, the dog will need surgery, however, surgery does not guarantee that the swelling will resolve and the animal will still be at risk of death.
What is another name for skeletal muscle? involuntary muscle connective muscle voluntary muscle interactive muscle reactive muscle?
Skeletal muscle, also known as voluntary muscle, is the type of muscle that we can consciously control. Unlike involuntary muscles, voluntary muscles respond to conscious signals from the brain.
Explanation:The other name for skeletal muscle is voluntary muscle. This term arises from the control we have over these muscles - we can consciously decide to move them. Unlike involuntary muscles (like the heart), which operate without conscious control, voluntary muscles (like those in the arms and legs) respond to conscious signals from the brain. For example, if you decide to lift an object, your brain sends a signal to the specific voluntary muscles in your arm and hand, causing them to contract and facilitate the movement.
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A cell spends approximately _____ of its cycle in the M phase.
How can human health be affected by changes in the air quality
list three substances that need to be transported into all kinds of animal cells in order for them to survive
Animal cells require oxygen for cellular respiration, glucose for energy, and amino acids for protein synthesis. These essential substances must be transported into cells to maintain cellular functions and ensure the survival of the cell.
Explanation:Three substances that need to be transported into all kinds of animal cells for them to survive are oxygen, glucose, and amino acids.
Oxygen is crucial for the process of cellular respiration, where it is used to help convert glucose into adenosine triphosphate (ATP), which is the energy currency of the cell. Glucose is a simple sugar that serves as a primary energy source for cells. Lastly, amino acids are the building blocks of proteins and are essential for constructing cellular structures and facilitating various metabolic functions.
Without these key substances, animal cells cannot perform necessary functions such as energy production, building and repairing tissues, and maintaining homeostasis. Animal cells have specific mechanisms, including active transport and facilitated diffusion, to ensure the proper intake of these molecules.
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Which of these activities are ways people degrade commons? Select the two correct responses.
A. Farmers allow livestock to overgraze federal pastureland.
B. Rangers limit the number of visitors to a nature preserve.
C. Rangers allow native plants to grow unchecked in a park.
D. Hunters hunt a valued species to extinction.
E. Politicians protect the habitat of an endangered species.
The correct answer is option , A and D
Here, the word common refers to the “Earth” and “its precious resource”. If a farmer allows overgrazing of pastureland, the land gets exposed to extreme weather condition and thus easily get eroded which could even lead to desertification. Also when a hunter kills a valued species that is at the verge of extinction, the ecosystem gets disturbed as the connecting link gets extinct which also disturbs the food chains and stability of the natural food web.
There are different kinds of agricultural activities. The activities that are ways people degrade commons are;
Farmers allow livestock to overgraze federal pastureland. Hunters hunt a valued species to extinction.What happens when one allow livestock to overgraze an area?In course of overgrazing, animals are known to limit or reduce the plant leaf areas, and thus it lowers plants' ability to trap sunlight and grow new set of leaf material.
This brings about a reduction and so there is slows down of plant regrowth and this can lead to the death of the plant.
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the appearance of pebbly texture on the surface of a deep wound indicates what process is taking place
A.Granulation
B.scabbing
C.Grafting
D.Coagulation
The answer is A; Granulation. Just went over it in class
Describe the differences between the two stabs in the soft agar plate. based on these results, which species appears to be motile
The _______ is responsible for determining the frequency of vibration of the air column in the tube within a wind instrument. A. effective length of the tube B. type of reed used C. reed's frequency of vibration D. humidity of the air
What causes the Moon to orbit around the Earth?
What is the difference between lipid measurement (cholesterol) and dm-4: lipid measurement?
Body motions during speaking are properly referred to as:
Consider what would happen if a red blood cell were placed in distilled water
Matthew decided he wanted to hike up Mount Everest. On his way to the top, it began to snow and the temperature dropped to -10°F. Matthew forgot to wear a heavy jacket so his body began to shiver beyond control. In this case, Matthew's body shivering is the ________ to a drop in temperature.
A. reflex
B. stimuli
C. response
D. environmental condition
ANSWER THIS A.S.A.P
Brown eyes (b) are dominant over blue eyes (b) and straight tails (t) are dominant over curly tails (t) in opossums. a brown-eyed, straight-tailed opossum male was mated to a tester female. the offspring were: 3 brown eyes and straight tails 2 brown eyes and curly tails 4 blue eyes and straight tails 3 blue eyes and curly tails what was the genotype of the male?
A program to reduce and control the population of sea lampreys was likely started in ?
Which scientist(s) suggested for the first time that the proportion of adenine and guanine differs from one species to another?
Erwin Chargaff, an Austrian-American biochemist, was the scientist who first observed that the proportion of adenine (A) and guanine (G) in DNA varies between species.
What is base pairing?The specific pairing of the nitrogenous bases (adenine, thymine, guanine, and cytosine) that comprise the two complementary strands of DNA is referred to as base pairing.
The Austrian-American biochemist Erwin Chargaff was the first to notice that the proportion of adenine (A) and guanine (G) in DNA varies between species.
He published a paper in 1950 describing the base composition of DNA in various species, which became known as "Chargaff's rules."
He discovered that the amount of A in each species always equals the amount of T (thymine), and the amount of G always equals the amount of C (cytosine), but the proportions of A+T and G+C vary from species to species.
Thus, the scientist that suggested for the first time that the proportion of adenine and guanine differs from one species to another was Erwin Chargaff.
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HELP PLEASE! 50 POINTS!!
Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive.
Which Punnett square shows the probability that 100 percent of offspring will have red eyes?
(choices below)
Option A is correct.
The genotype of 100% red eyed flies will be "XRXr, XRY, XRXr, XRy"
Explanation:As the red color of eyes in Drosophila is dominant, so the flies having even only one R will be having red eyes colors in a phenotype. So, all the flies male or female having R will be having red eyes for sure. Option A is the correct answer.
Answer:
a. is correct
Explanation:
it is right on edge 2020
Which of the 4 general gastric cell types are classified as enteroendocrine cells?
What are the basic building blocks of DNA and RNA?
The answer would be nucleotides
Many plants will grow from cuttings. The cutting develops a new root system and becomes a clone of the parent plant, but an independent new plant. This type of reproduction is called A) sexual. B) budding. Eliminate C) asexual. D)