I think the correct answer from the choices listed above is the last option. It is the mammals the groups of animals that only uses internal fertilization. Internal fertilization<span> is the union of an egg cell with a sperm during sexual reproduction inside the body of a parent. Hope this answers the question. Have a nice day.</span>
1. The oxygen requirements of an animal cannot be met by the process of diffusion as diffusion is a very slow process. To overcome this, multicellular organisms have specialized cells and tissues for performing various necessary functions of the body such as intake of oxygen and food.
2. What criteria do we use to decide whether something is alive? Any visible movement such as walking, breathing, or growing is generally used to decide whether something is alive or not. However, a living organism can also have movements, which are not visible to the naked eye.
3. An organism uses outside raw materials mostly in the form of food and oxygen. The raw materials required by an organism can be quite varied depending on the complexity of the organism and its environment.
4. The various processes essential for maintaining life are nutrition, respiration, transportation, excretion, control and coordination.
here it is hope it helps you out...
Answer:
Smaller ears, more dense and light coloured fur.
Explanation:
Smaller ears means that the surface area of the animal is decreased.
Less surface area = Less heat loss
Denser fur is self-explanatory. If the animal has more fur, that means that it will have better insulation. The light colouration of the fur is mainly for camouflage but it can also serve as a way of insulating/preventing heat from escaping.
Answer:
pituitary gland
Explanation:
The endocrine system is primarily hormones. Glands of the endocrine system are the pituitary gland, the thyroid gland, the parathyroid glands, the thymus, and the adrenal glands.