Water perpetually cycle's from the earth to the atmosphere and back. In the previous sentence what does perpetually mean?

A. constantly

B. frequently

C. occasionally

D. rarely

What is gel electrophoresis used for? O A. Cutting DNA into sections O B. Separating strands of DNA O C. Performing reverse transcription O D. Cloning organisms

What trophic level (s) do the birds occupy? Choose all that apply.

Which organisms would be the prey for the hawk?

What is the difference between independent and dependent variables

the jones family has eight children, all of whom are girls. what is the chance that the next child will be a boy?

Aquatic plants do not contain a) chloroplasts b) cells c) lignin d) nuclei e) chlorophyll

Jennifer's baby brother had infantile Tay-Sachs disease (TSD), but Jennifer did not have the disease. When Jennifer grew up and got married, her third child also had infantile TSD. How is this possible? A.

Which molecule do mammals use to store extra glucose? a. glycogen b. cellulose c. starch d. myosin

Which of these processes describes the effect Earth's atmosphere has on Earth's hydrosphere? A: River overflowing and flooding farmland B: Glaciers melting and increasing the ocean water levels C: Warm, moist air increasing ocean temperatures D:

Which two organelles are found in plant cells but not animal cells