If the age structure of a population is on the older side, birth rates tend to be:
A. Higher than normal
B. Lower than normal
C. Has no effect

The lineage of pea plants produced round seeds for four generations. the plants that fertilized these pea plants also produced round seeds. however, in the fifth generation, the plant produced to two plants with wrinkled seeds. can that be possible?

The pelican's beak is adapted for in .

Which action is a reflex action. a. asking for coffe in a cold climate b. blinking when light is flashed in the eyes c. drinking water when thirsty. d. swallowing food e. taking an exam