Proposed answer to a scientific question.
a. homeostasis
b. hypothesis
c. theory
d. protein

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above