A simplified food web is shown. suppose the birf population declines due to shortage of nesting sites. which organism would be lost negatively affected by a decline in the bird population A. Spider
B. Grass
C. Toad
D. Snake

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

cell division is not regulated in tumor cells.