Jellyfish

Question 1

Jellyfish mostly exist in what type of habitat?

Answer 1

Marine

Question 1

Jellyfish can also be found in __________ environments/habitats but in fewer cases

Answer 1

Freshwater

Question 2

Jellyfish are mostly _____-______ animals

Answer 2

Shallow water

Question 3

Cnidaria can exist in two forms; what are they?

Answer 3

1. Solitary
2. Colonial

Question 4

Are jellyfish powerful swimmers?

Answer 4

No; they just drift through the tides and only expend energy to get closer to the surface

Question 5

The phylum Cnidaria contains the most ________ members on the main line of evolution of the ___________ (hint: true, higher-level animal)

Answer 5

1. Primitive
2. Eumetazoans

Question 6

Which type of Cnidaria is very important ecologically as a “keystone” species?

Answer 6

Stony corals

Question 7

What type of symmetry do jellyfish have?

Answer 7

Radial

Question 8

TOT: The mouth of a jellyfish is located at the oral end/aboral end?

Answer 8

Oral

Question 9

The opposite side of a jellyfish is called oral/aboral?

Answer 9

Aboral

Question 10

Cnidocytes are cells with stinging organelle called a ____________cyst

Answer 10

Neumato

Question 11

What is the most unique feature of the phylum Cnidaria?

Answer 11

Nematocyst

Question 12

What method do jellyfish use as predators to shock their prey?

Answer 12

Stinging - penetrating and envenomating them

Question 13

Other types of of jellyfish capture prey by ___________ them

Answer 13

Entangling

Question 14

Some jellyfish can stick to the _________, holding the animal in place

Answer 14

Substrate

Question 15

Nematocysts are triggered automatically by ________ contact with prey

Answer 15

Physical

Question 16

The sharp parts of a nematocyst is called what?

Answer 16

Barbs

Question 17

Cnidaria have ______-________ level of organization

Answer 17

Cell tissue

Question 18

True tissues include decentralized (no brain) ________ _______

Answer 18

Nerve net

Question 19

jellyfish have bi_________ nerve cells

Answer 19

Directional

Question 20

Radial symmetry means decentralized _______ system

Answer 20

Nervous

Question 21

Nerve cells connect to muscular cells forming a coordinated neuro_______ system

Answer 21

Muscular

Question 22

The basic structure includes a digestive sac with one opening (mouth/anus), thus it is a ___-way digestive system

Answer 22

Two

Question 23

T/F: Cnidaria are diploblastic

Answer 23

True!

Question 24

What are the two germ layers that jellyfish have?

Answer 24

1. Ectoderm ("outer skin") 2. Endoderm ("inner skin")

Question 25

What are some other basic structures of jellyfish?

Answer 25

1. Outer epidermis 2. Inner digestive cavity (inner gastrodermis) 3. Non-cellular jelly-like mesoglea 4. Inner cavity (gastrovascular cavity)

Question 26

T/F: Cnidaria are not dimorphic

Answer 26

False!

Question 27

The two forms of jellyfish are what?

Answer 27

1. Polyp - sessile, "hydroid" form 2. Medusa - mobile "jellyfish" form

Question 28

The two main types of reproduction are?

Answer 28

1. Asexual reproduction 2. Sexual reproduction

Question 29

T/F: Polyp perform asexual reproduction

Answer 29

True!

Question 30

T/F: Medusa perform asexual and sexual reproduction

Answer 30

False; Medusa only perform sexual reproduction

Question 31

Why are there 2 forms of reproduction?

Answer 31

1. Finding mates 2. Accumulating nutrients

Question 32

T/F: Sea anemones and corals have only polyp forms

Answer 32

True

Question 33

What are the 4 main classes of the Cnidaria?

Answer 33

1. Hydro____ 2. Scypho___ 3. Cubo____ 4. Antho___

Question 34

The Hydrozoa class are mostly _______, colonial animals, like _______

Answer 34

1. Marine 2. Obelia

Question 35

T/F: Hydra are not atypical

Answer 35

False; they are

Question 36

T/F: Hydra are found in _______ habitats, in polyp/medusa form only

Answer 36

1. Freshwater 2. Polyp

Question 37

T/F: Hydra do both sexual and asexual reproduction

Answer 37

True

Question 38

T/F: Sexual reproduction occurs in the fall

Answer 38

True