What factors contributes most to the sustainability of a habitat
a. competition among large predators
b. large variety of organisms
c. presence of volcanic rock
d. absence of bacteria species

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

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.

Approximately what wavelength of light is best absorbed by chlorophyll a