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;
6 Cards in this Set
- Front
- Back
|
Why are sponges in the phylum Porifera? |
Their bodies are perforated by many pores. |
|
|
Are sponges sessile or motile? |
Sessile (not moving) |
|
|
What body plan do sponges have? |
•Sac plan •Outer layer of body contains flattened epidermal cells. •They have semifluid middle layer containing amoeboid cells that move around. •Inner layer is composed of flagellated, collar cells that produce water currents to draw water into the body. |
|
|
What is the sponges method of feeding? |
•They are sessile filter feeders. •Trap food particles floating in the water. •Food particles are engulfed by the collar cells and then digested in food vacuoles. •Nutrients are transferred to amoeboid cells, which transport them from cell to cell. |
|
|
How do sponges reproduce sexually? |
•Sperm is released into the water. •Amoeboid cells produce eggs and sperm. •Sperm is drawn into other sponges through pores. •Sperm fertilizes eggs within the body. •Most sponges are hemaphroditic. |
|
|
How do sponges reproduce asexually? |
•Fragmentation👉🏼 then regeneration. •Gemmule formation👉🏼similar to spores. •Budding👉🏼 Growth of new sponge attached to original. •Sprouts tentacles and a mouth, looks like a hydra, and begins an independent life. |
