Name two ecological challenges that can happen in Yellowstone summers and how they affect the organisms living there.

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees