Answer:
Rat and Squirrel are closely related.
Explanation:
Squirrel and rats are small mammals. Squirrel is a part of sciuridae family and order of rodentia. Rat also belong to there order rodentia. Squirrel are rodents like wise rats and share similar characteristics together. They have sharp teeth which continually grow,head shape and size and ear size.
Frederick Miescher first identified DNA.
DNA provides the instructions for protein production.
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Copulation is animal sexual behavior in which a male introduces sperm into the female's body, especially directly into her reproductive tract.
The pancreas carries out two important roles: It makes digestive juices
