Soil is made up of . a. mud, dirt, and water
b. clay, loam, and silt
c. dead animals, earthworms, and water
d. sand, silt, and clay

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

Read the article and use the information to answer the following questions. active transport in active transport, molecules are moved across the cell membrane with the of neurons electrical impulses proteins. inhibitors 3 of 3 vity

Which fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?