24. In an energy pyramid, the bottom level represents:

A. primary consumers

B. producers

C. scavengers

D. decomposers

E. secondary consumers

If a person has low levels of phosphorous in his or her blood, phosphorous may be "stolen" from bones to make it available for cellular molecules. Which molecules require phosphorous as part of their structure?

What part of the brain controls involuntary actions

Sarah wants to fish in a freshwater river. Which section of the river offers her the best location for fishing? A. middle of the river B. source of the river c. mouth of the river OD. all along the river

A 20-year-old female comes to the sexual health clinic for follow up related to a positive test for the human papillomavirus (hpv). the client asks the nurse, "is there anything i can do to get rid of this?" what is the nurse's best response?

How does seed-cutting differ from shelterwood cutting? a. Shelterwood cutting removes all trees within a given area. b. Shelterwood cutting takes place over several years. c. Seed-cutting takes place over several years. d.

Explain why the fact that invasive species did not co-evolve with the native species unbalances an ecosystem.

23 - You work for a furniture moving company. Your boss sends you to the hardware store to buy tie down rope. He tells you to buy the best deal. What is the best deal on rope? 10 feet for $7.00 20 feet for $13.00 50 feet for $28.00 100 feet for $57.

How does an atom become a positive ion?

The one-celled eukaryotic organisms above are often found in freshwater ponds. What is one characteristic they all have in common? A Nucleus B Cilia C Flagellum D Pseudopodia

This process is used for growth repair it is also a form of reproduction in asexual organisms