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11 Cards in this Set

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Explain how a sponge obtains food.
Sponges are filter feeders. They take water in and filter out the food.
Explain how epithelial-like cells control filter feeding in sponges.
Epithelial-like cells can contract and relax. This opens and closes pore cells
Compare and contrast sexual and asexual reproduction of sponges.
Sexual reproduction- sperm from another sponge of the same species enters with water, travels to eggs where fertilization occurs; zygotes develop into larvae, which leave the sponge and eventually settle on a surface, then they develop into adult sponges. Forms of asexual reproduction in sponges produce clones of the original sponge.
Describe the functions of amoebocytes in sponges.
Amoebocytes carry food from collar cells to all body cells, carry sperm to eggs, and produce chemicals that help make up spicules.
Infer why hermaphrodism is a reproductive advantage for sessile organisms.
In sessile or slow-moving organisms, hermaphrodism increases the chances that eggs and sperm can unite to continue the species.
Compare and evaluate the adaptations of multicellular organisms, such as sponges, and unicellular organisms for obtaining food.
Division of labor among cells enables an organism to carry out life functions more efficiently than one cell can.
List the sponge structures and their functions.
collar cells- has flagellum that draws water into the sponge; epithelial-like cells open and close the pores; pore cells- allow water carrying food and oxygen into the sponge; amoebocytes carry nutrients to other cells, carry sperm eggs, and produce chemicals that make up the spicules; spicules- protection; and osculum- water and waste expelled
method in which food particles are filtered from water as it passes by or through some part of the organism.
filter feeding
an animal that can produce both eggs and sperm.
fertilization that occurs outside the animal's body
external fertilization
fertilization that occurs inside the female's body.
internal fertilization