To survive, animals need water, oxygen, food, climate, shelter, and space. Generally, the possible reasons for the decline of herbivores in a population include not enough food or shelter left to sustain the population, an increase in predators, and disease.
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Genetic testing is not 100% accurate so it should not influence medical treatment, although it does find down-syndrome in a child in a mother's womb and cancer in breast cancer patients, it does have errors and can be wrong.
The answer to this is yes the immune system is like the military of the body
Answer:
The pelvic bones of whales are “one of the classic examples of a vestigial structure,” said Otárola-Castillo. “But what we found was that the shapes of these bones are highly associated with the mating systems of these whales and dolphins — species that are more promiscuous have more-complex-shaped pelves.”