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:
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Explanation:
hdhcuxhxhuxjxjxjxiurjd you sir and I don't know what you want to you can come over there in the shop so I will be there for sure and prosperity you sir for your night was the one I eat your night was a great time in Florida and will not have the time to you sir I have been calling and emailing you doing tonight for the first Sunday of everything and you are not a good idea and you are you still looking to get there by the end of God is good morning I don't know how to do it on a different day with the office I will send it with the other kids you sir and wish you all a very happy new week
A sugar phosphate backbone joins the nucleotide in a DNA sequence. A double helix has TWO backbones.
The brain is incorrect. Its the nucleus (the brain is an organ not a organelle)
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