Exam 3 Clicker Questions

Question 1

An advantage of internal fertilization over external fertilization is that

Answer 1

Internal fertilization prevents the drying out of gametes in a dry environment.
Internal fertilization requires less gamete production.

Question 2

Animal cells with an internal solute concentration of 500 mOsm/L are placed in a fluid with solute concentration of about 700 mOsm/L. Water will initially tend to flow

Answer 2

Out of cells

Question 3

Collar cells in sponges are used in feeding & are also called

Answer 3

Choanocytes

Question 4

A monoecious organism

Answer 4

Produces both egg and sperm gametes

Question 5

The evolution of spongee species of greater size required

Answer 5

A way to increase the surface area for filtering

Question 6

The largest sponge have the ____ form.

Answer 6

Leuconoid

Question 7

Cells with organelles that can discharge threads for various purposes in jelly fish are called

Answer 7

Cnidocytes

Question 8

The “stinging organelle” characteristic of jellyfish is a

Answer 8

Nematocyst

Question 9

Gastrodermal muscle cells of cnidarians are derived from what type of embryonic tissue?

Answer 9

Endoderm

Question 10

Dioecious medusae are present in species of ______.

Answer 10

Scyphozoans and hydrozoans

Question 11

T/F in Sponges, choanocytes engulf food particles before water exits the gastrovascular cavity

Answer 11

False

Question 12

The gastrovascular cavity of cnidarians has how many openings

Answer 12

One

Question 13

In the phylogenic tree, which letter marks the divergence between protostome and deuterostome animals

Answer 13

C (SECOND RIGHT)

Question 14

Which of the following is closely associated with bilateral symmetry in animals?

Answer 14

Cephalization

Question 15

Free-living (non-parasitic) flatworms are

Answer 15

Turbellarians

Question 16

A protonephridium is composed of

Answer 16

A tube cell and a flame cells

Question 17

Which of the following is common to both polychaete and oligochaetes?

Answer 17

Setae

Question 18

In the figure below, which letter indicates the ventral side of the cat?

Answer 18

B (belly side)

Question 19

Annelids are ____________ with a(n) __________ body cavity.

Answer 19

protostomes; schizocoelous

Question 20

What is the term given to the body segments that are in most annelid bodies?

Answer 20

Metameres

Question 21

A molluscan shell is formed by secretions of the

Answer 21

Mantle

Question 22

A structure used in feeding that is unique to the Mollusca is the

Answer 22

Radula

Question 23

Cephalopod “jet propulsion” utilizes a structure called the ____ that is formed from the animal’s ____.

Answer 23

Funnel, mantle

Question 24

A gastropod marine “slug” is also known as a

Answer 24

nudibranch

Question 25

The largest “heaviest” invertebrate caught to date is the

Answer 25

Cephalopod (giant squid)