Oxygen and carbon dioxide diffuse in and out of a leaf through the:

A) Taproot

B) Stomata

C) Phloem

D) Guard cell

Which would be a homologous structure to a human arm bone? O O A. A whale pelvis bone B. A lion's tooth O C. A chimpanzee's skull bone O D. A bird's wing bone

Which element is not found in abundance in the atmosphere? A. Carbon B. Nitrogen C. Phosphorous

Why is oxygen important for maintaining your muscles functions

This type of diabetes eventually result in all of the insulin producing cells in the pancreas being destroyed? a. type 1 b. type 2 c. type 3 d. type 4

The human heart has an organ that is made up of cells not all of the cells that make up the heart or identical however. What name is given to a group of similar cells that perform a special function and together make up an organ?

Cyclins are a family of closely related proteins that a. regulate the cell cycle b. cause cancer c. produce lipids

Many functions in the body are controlled by special compounds. Which statements about these compounds do you think are true? Check all that apply. The body can make all of the compounds it needs. The body gets energy from some compounds.

The wide range of eye color indicates that eye color is

you are using magnets in the classroom. During science you keep hearing your classmates drop the magnents. What testable question can you develop based on this observation?

Darwin argued that the beak size and shape of Galapagos finch species was related to their a. body size. b. food source. c. time of reproduction. d. flight pattern.