Bio

Question 1

What are the characteristics of sponges?

Answer 1

Absent tissues & organs, most sponges are hermaphrodites, spicules provide structural support

All sponges do not reproduce asexually.

Question 2

What is the primary method of reproduction for polyp structures in Cnidaria?

Answer 2

Asexually via budding

Question 3

What type of symmetry is observed in Cnidaria?

Answer 3

Radial symmetry

Question 4

What cells produce spicules in sponges?

Answer 4

Sclerocytes

Question 5

Which class of Cnidaria includes true jellyfish?

Answer 5

Scyphozoa

Question 6

Which class of Cnidaria includes sea anemones?

Answer 6

Anthozoa

Question 7

What is Hydroxyapatite used for?

Answer 7

Strengthening & regenerating bones in the face, hands & jaw

Question 8

Which of the following is a shared feature between Hydra & Sponges?

Answer 8

Absent tissues

Question 9

What type of symmetry is seen in cnidarians?

Answer 9

Radial Symmetry

Question 10

What structure in Cnidaria contains cnidocytes?

Answer 10

Tentacles

Question 11

What is the function of nematocytes?

Answer 11

Release poison & hook potential prey

Question 12

Fill in the blank: The opening in cnidarians acts as both a _______ and an anus.

Answer 12

Mouth

Question 13

Which of the following structures is unrelated to cnidarians?

Answer 13

Spicules

Question 14

What is the umbrella-shaped structure in Cnidaria called?

Answer 14

Medusa

Question 15

True or False: All sponges reproduce asexually.

Answer 15

False

Question 16

What is the role of mesoglea in Cnidaria?

Answer 16

Provides structural support between the ectoderm and endoderm

Question 17

What is a planula in Cnidaria?

Answer 17

A larval stage that develops into a polyp

Question 18

What type of organism is a sea anemone classified as?

Answer 18

Anthozoa

Question 21

What characteristics do roundworms possess?

Answer 21

D Pseudocoelomates

Pseudocoelomates have a fluid-filled body cavity separating the gut of the organism from the body wall, but it is not lined by mesoderm, unlike true coelomates.

Question 22

What characteristic is clearly visible in the cross-section of a roundworm?

Answer 22

B Pseudocoelomate

Roundworms are pseudocoelomates.

Question 23

What are the characteristics of sponges?

Answer 23

Absent tissues and organs, filter feeders, express intracellular digestion, lack symmetry (asymmetrical), lack a nervous system.

Question 24

What are sclerocytes?

Answer 24

Cells that produce spicules.

Question 25

What are spicules?

Answer 25

Needle-like structures made up of silica, spongin (collagen protein), or calcium carbonate, providing rigidity and form to sponges.

Question 26

How do sponges reproduce?

Answer 26

Most are hermaphrodites and reproduce asexually through fragmentation, budding, and gemmulation.

Question 27

Which of the following organisms lacks a nervous system?

Answer 27

D Sponge ## Footnote Sponges lack a nervous system.

Question 28

Which method of reproduction is not used by sponges?

Answer 28

D Conjugation ## Footnote Sponges can reproduce both sexually and asexually.

Question 29

What type of feeders are sponges?

Answer 29

D Filter Feeders ## Footnote Sponges are filter feeders.

Question 30

In protostomes, what does the first opening in the gastrula develop into?

Answer 30

C Mouth ## Footnote In protostomes, the first opening in the gastrula develops into the mouth.

Question 31

Which of the following is an example of an acoelomate?

Answer 31

A Flatworms

Question 32

Which organism expresses bilateral symmetry?

Answer 32

B Starfish

Question 33

Which of the following is not a characteristic of sponges?

Answer 33

D Express intercellular digestion ## Footnote Sponges express intracellular digestion and not intercellular digestion.

Question 34

Spicules are formed from all of the following except?

Answer 34

D Keratin ## Footnote Spicules are formed from silica, spongin, or calcium carbonate. They are not made up of keratin.