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.
Answer:
Different components of a mixture have different properties on the basis of which we device the method that is used to separate it from other components of the mixture
<u>-TheUnknownScientist</u><u> 72</u>
After n cycles of PCR = 2^n copies of the target
sequence
Where n = 30 cycles as given in
the problem.
Substituting this to the
identified formula, let
2^30 1,073,741,824 copies of the target sequence.
<span>Therefore, a total of 1,073,741,824
copies would be produced.</span>
The protein capsid of the virus is lacking in a cell. The capsid is a protein shell of the virus that protects the virus and encloses the genetic material of the virus. The capsid is formed of subunits called protomers. The protomers are made of protein. It also allows the virion to attach to a host cell and <span>enables the virion to penetrate the host cell membrane.</span>