Which two features indicate that a cell is a plant cell and not an animal cell?

a.

central vacuole, mitochondria

b.

chloroplasts, cell wall

c.

ribosomes, green color

d.

cell membrane, large size

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons