Complex organisms with gills and lungs were major life forms that existed in the

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

How does natural selection change thephenotypes within a population over time?

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c