chapter 35 section 1 Flashcards Preview

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Flashcards in chapter 35 section 1 Deck (17):
1

what is a collar cell

flagellated cell that lines interior of sponge

2

osculum

the opening at the top of the sponge

3

spicule

tiny, hard particles of calcium carbonate or silicon dioxide that are often shaped like spikes

4

calcium carbonate

CaCO3

5

Silicon Dioxide

SiO2

6

amebocyte

crawling cell that brings nutrients to the rest of the body.

7

invertebrates are animals that lack

a backbone

8

adult sponges are sessile, which means that they

attach to a surface and do not move

9

collar cells perform 3 functions

pumps water into the interior of the sponge
engulfs and digests food that is filtered from the water
passes nutrients to amebocytes

10

sponges eliminate carbon dioxide and cellular wastes by

allowing them to diffuse into the water that passes through the sponge

11

after a sponge egg is fertilized, it develops into a

larva

12

explain why there is so much diversity among invertebrates

it only has to lack a backbone to be an invertebrate

13

what are the two substances that a sponge's skeleton may be made of

spongin and spicules

14

how do spongin and spicules differ

spongin is a network of protein fibers
spicules are tiny, hard particles of calcium carbonate or silicon dioxide that are shaped like spikes

15

how do collar cells participate in the sexual reproduction of sponges

collar cells in a sponge engulf the sperm and transfer them to amebocytes which carry the sperm to the egg

16

why is hermaphroditism beneficial in sponges even though they rarely self fertilize

the chance of successful fertilization is higher

17

would gemmules or larvae be better at distributing a population of sponges through an area?

larvae, because larvae can swim anywhere by their flagella. This would cause a wide spread.