The ability of a muscle to exert force is:
a. strength
b. endurance
c. fitness
d. flexibility

Archaebacteria use for movement. celia flagella pili cell walls

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.