allow the sponge to survive long periods of harsh conditions. Predators filter feeders parasites detritivores 1 2 3 4 5Ģ0 The benefit of a sponge’s producing gemmules is that gemmulesĪre a form of sexual reproduction. 1 2 3 4 5ġ9 Which of the following best describes the feeding habits of sponges? 1 2 3 4 5ġ8 Many sponges protect themselves from predators by producing 1 2 3 4 5ġ7 Sponges reproduce sexually by a process calledĬephalization. 1 2 3 4 5ġ5 Which term is NOT associated with sponges?Ĭhoanocytes medusa spicules gemmules 1 2 3 4 5ġ6 Some biologists believe that sponges evolvedįrom hydras. Which of the three cell layers in animal embryos gives rise to muscles and much of the circulatory, reproductive, and excretory systems? endoderm ectoderm mesoderm protostome 1 2 3 4 5ġ4 Organisms that spend their entire adult lives attached to one spot are said to be 1 2 3 4 5ġ2 A blastula is a stage in the development of an embryo that consists ofĪ solid ball of cells. 1 2 3 4 5ġ1 An animal that has distinct left and right sides shows 1 2 3 4 5ĩ A parasite is a type of algae. When an animal’s environment changes, sexual reproduction improves a species’ ability to react. Many small aquatic organisms move oxygen and carbon dioxide through their skin by the process of diffusion. 1 2 3 4 5ĥ Aquatic animals that strain floating plants and animals from the water they take in are 1 2 3 4 5ģ An animal is each of the following EXCEPT 1 2 3 4 5Ģ If a cell contains a nucleus and membrane-bound organelles, it is 1 Unlike plant cells, animal cells do not have
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