What occurs when oxygen in the lungs passes through the capillary wall to the blood, and carbon dioxide and water from the blood pass into the lungs a. respiratory system b. gas exchange c. breathing

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48

Which particle controls what element an atom is?