House martins (depicted on the right) feeding their young in the nest are clear examples of central-place foragers. Imagine that a house martin travels to two different patches to collect meals for its chicks. The patches are identical except that one is farther from the nest. According to the marginal value theorem, which statement best describes how an optimally foraging house martin should behave? A. It should stay longer in and collect a larger load from the closer patch.
B. It should stay longer in and collect a smaller load from the closer patch.
C. It should stay longer in and collect a larger load from the more distant patch.
D. It should stay longer in and collect a smaller load from the more distant patch. Submit

List two modern organisms that have pentameral symmetry

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

Acarotenoid is a yellow-orange pigment that absorbs light. infrared blue-green yellow-orange ultraviolet