Many species of birds are behaviorally adapted to migrate from one area to another as the seasons change. Often, this migration involves the birds flying north toward the Arctic during the summer and returning south during the winter. These birds have most likely adapted their behavior of migration because it allows them to
A.
decrease the number of individuals killed by predatory birds.
B.
find food more easily during stressful environmental conditions.
C.
increase their reproductive success by leaving offspring in many areas.
D.
burn excess energy during times when increased food is available.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.