circulatory system in amphibians; the flow of blood to the lungs and the moist skin for gas exchange

circulatory system in amphibians; the flow of blood to the lungs and the moist skin for gas exchange

flow of blood away from the heart through the lungs where oxygenation occurs and then returns to the heart again

active transport mechanism that works against electrochemical gradients

model for rapid speciation that can occur when an event causes a small portion of a population to be cut off from the rest of the population

visual representation of a cross between two individuals in which the gametes of each individual are denoted along the top and side of a grid, respectively, and the possible zygotic genotypes are recombined at each box in the grid

small opening though which light enters

growth of a single cell type in the laboratory

type of nitrogenous base in DNA and RNA; adenine and guanine are purines.

type of nitrogenous base in DNA and RNA; cytosine, thymine, and uracil are pyrimidines.

three-carbon sugar that can be decarboxylated and oxidized to make acetyl CoA, which enters the citric acid cycle under aerobic conditions; the end product of glycolysis