Porifera And Radiata - Sponges

Question 1

Phylum Porifera - filter feeders, sessile and no body symmetry. What am i?

Answer 1

A SPONGE!!!

Question 2

How does a Porifera (sponge) get its food?

Answer 2

With its choanocytes - they contain a flagellate which draws water in through the spongocoel and out a large open called the osculum

Question 3

How do Porifera (sponges) reproduce?

Answer 3

Asexually - budding so the offspring is a clone!!!

Sexually - when the sponge is monoecious (the sponge produces both male and female gametes)

Question 4

What organism has biradial symmetry, have cnidoyctes (stingers), have a hydrostatic skeleton, and are a very ancient phylum?

Answer 4

Phylum radiata - cnidarians and Ctenophora!!! JELLYFISH!!!!!!!!!

Question 5

What germ layers to cnidarians (jelly fish) have?

Answer 5

A ectoderm and endoderm

Question 6

What is the mesoglea?

Answer 6

A translucent, jelly like substance found between the ectoderm and endoderm in cnidarians. Functions the hydrostatic skeleton

Question 7

Cnidarians are coelomates, aceolomes or psudeocoelomates?

Answer 7

Acoeloamtes - they have no coelomatic cavity, instead they have the mesoglea

Question 8

What are the four classes of cnidarians?

Answer 8

Anthozoa (sea anemones and corals)
Hydrozoa (hydra)
Cubozoa (box jellies)
Scyphozoa (jellyfish)