A student is given the following list. The presence of which structure allows the student to conclude that the unit is a eukaryotic cell? 1.protein 2.RNA 3.mitochondrion 4.ribosome

A. Structure 1
B. Structure 2
C. Structure 3
D. Structure 4

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

Science which of the following is an example of a cyclic behavior that is seasonal? i think the answer is d, i just need to double check : ). a. running from predators. b. searching for water. c. hunting at night. d. migrating for warmth. ***

Define adaptation. why do organisms adapt? give an example.