HOMEWORKS

Question 1

ALL animals are multicellular, eukaryotic, aerobic, and heterotrophic

Answer 1

true

Question 2

Animals which demonstrate ________________________ symmetry only have one plane of symmetry (do not hyphenate this word)

Answer 2

bilateral

Question 3

Cnidarians are the most ancient group of animals on the planet

Answer 3

false

Question 4

In the evolutionary trend of _____________________________, sensory organs become increasingly found near the anterior end and central nervous system of the animal

Answer 4

cephalization

Question 5

In the embryological development of an animal, the hollow space within the bastula is called the blastocoel

Answer 5

true

Question 6

In a ____________________________ animal, only two embryological germ layers form during development

Answer 6

diploblastic

Question 7

In Protostome animals, the blastopore eventually develops into the anus of the animal

Answer 7

false

Question 8

Which embryological germ layer eventually develops into the skeletal and muscular systems in animals that possess them? ___________________________

Answer 8

mesoderm

Question 9

Arthropods are the most diverse animal phylum on the planet

Answer 9

true

Question 10

In ____________________________ animals, the blastopore eventually develops into the anus of the animal

Answer 10

deuterostomes

Question 11

In Pseudocoelomate animals, the coelom is derived from both the ectoderm and the mesoderm

Answer 11

false

Question 12

The ______________________ of an animal is a fluid or air filled space between the digestive tract and the outer body wall

Answer 12

coelom

Question 13

Chordates and Echinoderms are both Deuterostome animal phyla

Answer 13

true

Question 14

The scientific clade (taxonomic group) known as ________________________ includes ALL animals with true tissues (ONLY sponges are eliminated from this group)

Answer 14

eumetazoa

Question 15

The nervous system of animals (who possess them) is derived from the ectoderm

Answer 15

true

Question 16

Most sponges demonstrate radial symmetry

Answer 16

false

Question 17

The inner body of a sponge is lined with specialized cells known as ____________________________ that create water currents through the sponge (use plural version of the term)

Answer 17

choanocytes

Question 18

Sponges lack biological tissues, and excretion and respiration are accomplished by simple diffusion

Answer 18

true

Question 19

Sponges have sharp structures incorporated into their body wall known as __________________________ which provide the sponge with protection against predators (use plural version of the word)

Answer 19

spicules

Question 20

Cnidarians lack a central nervous system

Answer 20

true

Question 21

Many Cnidarians have specialized stinging cells along their tentacles known as _________________________ (use plural version of the word)

Answer 21

nematocysts

Question 22

Sea fans are in the Cnidarian class: Hydrozoa

Answer 22

false

Question 23

Hydras have two major body forms during their life cycle, the mobile medusae phase, and the sessile ___________________ phase (using singular term)

Answer 23

polyp

Question 24

Animals within the Phylum: Platyhelminthes are acoelomate

Answer 24

true

Question 25

Flatworms accomplish excretion utilizing protonephridia that are comprised of individual units called ______________________ cells

Answer 25

flame

Question 26

The pharynx of a flatworm plays an important role in gas exchange in these animals

Answer 26

false

Question 27

The digestive organ in the Earthworm known as the ___________________, helps mash and grind up material as it moves through the digestive tract

Answer 27

gizzard

Question 28

Some animals in the Class: Oligochaeta have the ability to live among hydrothermal vents on the ocean floor

Answer 28

false

Question 29

Animals in the Class: Polychaeta have muscled, bristled appendages known as ________________________ which allow these animals to efficiently move in an aquatic environment

Answer 29

parapodia

Question 30

Earthworms have a closed circulatory system with five anterior aortic arches that pump oxygen to the rest of the body

Answer 30

true