Which is required for both anaerobic respiration and aerobic respiration?
a. oxygen
b. water
c. mitochondria
d. glucose

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

During convection, less dense fluid rises and denser fluid sinks.