Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
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.
|
hermaphrodite
|
|
|
fertilization that occurs outside the animal's body
|
external fertilization
|
|
|
fertilization that occurs inside the female's body.
|
internal fertilization
|
