We talked about a diversity of respiratory strategies used by animals in class. One of the main differences between fish & frogs compared to reptiles, and mammals was that fish and frogs use buccal pumps and reptiles and mammals use suction pumps. How do buccal and suction pumps differ (please refer to where volume and pressure is changed and how it moves the respiratory medium through the respiratory system)? Explain how frogs use buccal pumps and mammals use suction pumps to ventilate their lungs. Birds use a modified pump system - how is this pump system of the bird different from mammals? g

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind

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.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing