54. Amphibians are cold-blooded animals, meaning they do not have a constant body temperature but instead take on the temperature of their environment. They have moist, scaleless skin that absorbs water and oxygen, but that also makes them vulnerable to dehydration (loss of bodily fluids).
55. The first and foremost characteristic of the reptiles is that are cold blooded. They are able to regulate their inner body temperature to the temperature of the environment. They have scaly skins but absence of hair or fur. The scales of the reptiles develop as a surface cells filled with Keratin.
56. Characteristics of Birds. Birds are endothermic and, because they fly, they require large amounts of energy, necessitating a high metabolic rate. As with mammals, which are also endothermic, birds have an insulating covering that keeps heat in the body: feathers.
57. Mammary Glands.
Undercoat and Guard Hair.
Jaw and Ear Bones.
Four-Chambered Heart and Diaphragm.
Complex Brain Functions.
Most amino acids require Active Transport.
<h3>What is active transport?</h3>
According to Wiki, "Active Transport is described as a process that involves the movement of molecules against a gradient or an obstruction from a location of lower concentration to a region of greater concentration."
A protein pump uses ATP, which is a form of stored energy, to move molecules during active transport.
<h3>What are amino acids?</h3>
Organic substances known as amino acids have basic amino groups (-NH2) and carboxyl groups (-COOH). Amino acids are the components found in proteins. Proteins and peptides are both made up of lengthy chains of amino acids. There are a total of twenty amino acids used in the production of proteins.
Learn more about Amino acid with the help of the given link:
brainly.com/question/13252811
#SPJ4
Answer:
it's related to the factors of diffusion, in this case...
the molecule is small, the mass of it is a factor of diffusion, since it's smaller, it can diffuse quickly, since it has less weight, so it moves faster.
When the cell increases in size, the volume increases faster than the surface area, when there is more volume and less surface area, diffusion takes longer and is less effective.
Answer:
A) control group is the right answer
