Dependent variable: rats ability to solve the maze (depends on caffeine)
independent variable: 100 rats (stays the same and is not affected)
I think it's Robert Hooke. I could be wrong, though:/
Explanation:
Stratified cuboidal epithelium and stratified columnar epithelium can also be found in certain glands and ducts, but are uncommon in the human body.
Answer:
D. reproduction
Explanation:
If the species doesn't reproduce they die out or become extinct.
