DIVERSITY OF ANIMALS (2)

Question 1

True or False: All animals are multicellular.

Answer 1

True. The Animal Kingdom is defined as a group of multicellular eukaryotes.

Question 2

What is the name for the study of classifying organisms?

Answer 2

Taxonomy

Question 3

True or False: All animals are heterotrophic

Answer 3

True. Animals need to consume other organisms for energy.

Question 4

What are the three main types of body symmetry found in animals?

Answer 4

Assymetrical, bilateral, radial

Question 5

True or False: Sponges have true specialized tissues.

Answer 5

False. Sponges are in the group Parazoa, meaning they lack true specialized tissues.

Question 6

What are the three germ layers that develop in triploblastic animals?

Answer 6

Endoderm, mesoderm, ectoderm

Question 7

True or False: All animals undergo sexual reproduction.

Answer 7

False. Some animals, like certain cnidarians and flatworms, can reproduce asexually.

Question 7

What is the name of the fluid-filled body cavity found in many animals?

Answer 7

Coelom

Question 8

True or False: The mouth develops first in deuterostomes.

Answer 8

False. The anus develops first in deuterostomes.

Question 9

What is the name of the phylum that includes sponges?

Answer 9

Porifera

Question 10

True or False: Invertebrates are the largest group of animals.

Answer 10

True. Invertebrates make up nearly 97% of all animal species.

Question 11

What are the four main classes of cnidarians?

Answer 11

Anthozoa, Scyphozoa, Cubozoa, and Hydrozoa

Question 12

True or False: Nematodes have a true coelom.

Answer 12

False. Nematodes have a pseudocoelom

Question 13

What is the name of the phylum that includes segmented worms?

Answer 13

Annelida

Question 14

True or False: Mollusks are acoelomates.

Answer 14

False. Mollusks are eucoelomates.

Question 15

What are the five main subphyla of arthropods?

Answer 15

Trilobitomorpha, Hexapoda, Myriapoda, Crustacea, and Chelicerata

Question 16

True or False: Echinoderms are exclusively marine animals.

Answer 16

True

Question 17

What are the four main characteristics of chordates?

Answer 17

Notochord, dorsal hollow nerve cord, pharyngeal slits, and post-anal tail.

Question 18

True or False: Hagfishes are true vertebrates.

Answer 18

False, Hagfishes lack a vertebral column

Question 19

What is the name of the clade that includes bony fishes?

Answer 19

Osteichthyes

Question 20

True or False: Amphibians are endothermic.

Answer 20

False. Amphibians are ectothermic

Question 21

What are the three main orders of amphibians?

Answer 21

Urodela (salamanders), Anura (frogs), and Apoda (caecilians)

Question 22

True or False: Reptiles are endothermic.

Answer 22

False. Reptiles are ectothermic.

Question 23

What are the four main clades of reptiles?

Answer 23

Crocodilia, Sphenodontia, Squamata, and Testudines

Question 24

True or False: Birds are endothermic.

Answer 24

True

Question 25

What are the three main clades of mammals?

Answer 25

Monotremes, marsupials, and eutherians

Question 26

True or False: All mammals have a four-chambered heart.

Answer 26

True

Question 27

What are the three living species of monotremes?

Answer 27

Platypus and 2 species of echidnas

Question 28

True or False: Marsupials have a more complex placental connection than eutherians.

Answer 28

False. Eutherians have a more complex placental connection.

Question 29

What is the name of the group that includes humans?

Answer 29

Homo sapiens