Lab Exam 3

Question 1

Domain Eukarya

Answer 1

4 Kingdoms: Protista, Plantae, Fungi, Animalia

Question 2

Kingdom Animalia

Answer 2

1. Phylum Porifera – sponges 2. Phylum Cnidaria – jellyfish, hydra, sea anemones, corals a) Class Hydrozoa b) Class Scyphozoa c) Class Anthozoa

Question 3

Phylum Porifera (osculum and ostia)

Answer 3

osculum and ostia

Question 4

Relate flow of water

Answer 4

Water enters through the ostia, passes through the spongocoel, and exits through the osteum.

Choanocytes line the inside of the sponge and surround flagella which together pass the water through the spongocoel

Question 5

Silica, Spongin sponges

Answer 5

Silica are long white ones and all the brown ones that look like loofahs are spongin

Question 6

Cross-Section of Sponge: know following structures and know their functions: osculum, spongocoel, ostia.

Answer 6

Question 7

Phylum Cnidaria (Anatomy)

Answer 7

Question 8

Cnidaria: Polyp vs. Medussa forms

Answer 8

Polyps are stationary (tethered to a stem); medussa is the cap and free-floating (like a jellyfish)

Both are 2n; both have tentacles

Question 9

Cnidaria Tentacles

Answer 9

used for movement, feeding and protection against by predators due to their stinging cells

Question 10

Describe live Hyrdra (Class Hydrazoa)

Answer 10

Hydra can move by floating or by using its tentacles to pop/cartwheel

Question 11

Cnidaria: Hydra Structures and Function

Answer 11

gastrovascular cavity: water flows in through the mouth into the cavity and digestion occurs

tentacles: locomotion and stinging
mouth: water goes in
cnidocytes: Sting (the bumps on the tentacles)

Question 12

Obelia Life Cycle

Answer 12

Question 13

Feeding vs. Reproductive Polyps

Answer 13

Question 14

Obelia: Free-Living Medusa

Answer 14

Question 15

Class Sychophoza

Answer 15

True Jellyfish

Question 16

Class Anthozoa

Answer 16

corals & sea anemones

Know structures

Composition: corals form a hard skeleton made of calcium carbonate

Question 17

Common Features of Cnidaria, Sponges

Answer 17

All eukaryotic,

All Multicellular

All Chemo-heterotrophic

Sexual Reproduction (except polyps which are asexual)

Mostly exhibit body symmetry (radial/bilateral)

Some but not all have “true tissue”

locomotion from cilia (larvae) and tentacles

Filter Feeders

Many armed with stinging cells and tentacles allow for locomotion as well as some are able to do jet repulsion