An earthworm has a heart that moves blood.

What is the main function of this organ?

A. To take in oxygen and remove carbon dioxide

B. To take in and digest food

C. To transport materials to and from body cells

D. To respond to the environment

Why is it important to know the terms related to the cardiovascular, blood and lymphatic, respiratory system, urinary systems?

Use newtons universl law of gravitation to explain why gravity is greater on Venus than on mars

Many of the biochemical reactions that occur within cells are catalyzed by enzymes. Which of the following statements is true about most enzyme-assisted reactions?

Which trait is solely dependent on its environment? A: a dogs tendancey to bark B: height C: eye color D: ability to type accuratley

Science is seldom advanced in isolation. Watson and Crick could not have arrived at their model of the helix without discovery of the structure of and how they are linked together, X-ray crystallography data, or biochemical analysis of the molar

Unlike fossil fuels, biomass fuels

Which of these products is formed during the metabolic reactions of cellular respiration

8. Agent that kills microorganisms, rather than inhibits it:

What nutrients are required in higher amounts during pregnancy due to their roles in the synthesis of red blood cells?

Why are freshwater ecosystems such important resources? Mark all that apply