Biologists use a classification system to group organisms in part because organisms

Salmonella, Shigella, Yersinia, and Serratia are all A) Pathogens. B) Gram-negative facultatively anaerobic rods. C) Gram-positive aerobic cocci. D) Fermentative. E) Endospore-forming bacteria.

Select the correct answer. Mark has diabetes and needs to undergo dialysis twice a week. Dialysis purifies the blood by removing waste and excess water from the blood. Which body system does dialysis perform a function for? A. circulatory B.

Gene flow is one force that can cause evolutionary change. Which example best illustrates gene flow?

The seeds of leguminous plants are a source of proteins. Nitrogen - fixing bacteria live in the roots of such plants. Do you think there is a connection between the two facts?

The epa studies pollution and other environmental health hazards

Why is altruistic behavior not very common?

What word is definted as the separation of the genetic material of a cell into two completely identical sets, one for each of the daughter cells created during cell division? mitosis meiosis cytokinesis DNA synthesis

A universal genetic code allows for what

Identify the true statements regarding disulfide bridges (disulfide bonds). Disulfide bridges have a stabilizing effect on proteins. Disulfide bridges are formed by an irreversible oxidation reaction.

The inability of an organism to produce certain proteins can occur when an organism is lacking am enzyme needed to combine