LAB 2 - ANIMAL CLASSIFICATION

Question 1

Lophotrochozoans are characterized by

Answer 1

Gradual increase in body mass without molting

Question 2

Ecdysozoans are characterized by:

Answer 2

Molting their exoskeleton

Question 3

Echinoderms are characterized by:

Answer 3

Endoskeletal spines and radial symmetry

Question 4

Flatworms are characterized by all of the following EXCEPT:
a. Bilateral symmetry
b. Presence of ectoderm, endoderm, and mesoderm
c. Coelom
d. Saclike digestive cavity

Answer 4

c. Coelom

Question 5

What mollusk group has a one-part shell?

Answer 5

Gastropods

Question 6

Cephalopods are known for

Answer 6

Jet propulsion

Question 7

Bivalves, such as clams, are characterized by

Answer 7

Muscular foot and two-part shell

Question 8

Annelids are segmented worms with segmentation seen

a. Externally only
b. Internally only
c. Both externally and internally

Answer 8

c. Both externally and internally

Question 9

What is a characteristic feature of polychaetes

Answer 9

Many setae for locomotion

Question 10

Earthworms are known for?

Answer 10

Lack of a well-defined head region

Question 11

Leeches feed by

Answer 11

Sucking blood

Question 12

Which group of lophotrochozoans has a mantle cavity for gas exchange?

Answer 12

Gastropods

Question 13

Roundworms are known for having

Answer 13

A complete digestive tract

Question 14

Which group of arthropods has a head bearing compound eyes, antennae, and mouthparts?

Answer 14

Crustaceans

Question 15

Spiders, scorpions, ticks, and mites belong to the group of:

Answer 15

Insects

Question 16

Crustaceans are characterized by

Answer 16

Five pairs of walking legs

Question 17

Insects have adaptations for:
a. Marine life
b. Filter feeding
c. Terrestrial life

Answer 17

c. Terrestrial life

Question 18

Which group of arthropods is known for spinning silk

Answer 18

Arachnids

Question 19

How many pairs of legs do insects typically have?

Answer 19

Three

Question 20

Arachnids are characterized by

Answer 20

Silk-spinning ability

Question 21

What feature contributes to the success of arthropods?

Answer 21

flexible exoskeleton

Question 22

Vertebrate chordates include all of the following EXCEPT:
a. Fishes
b. Amphibians
c. Reptiles
d. Invertebrates

Answer 22

d. Invertebrates

Question 23

Cartilaginous fishes, represented by sharks and rays, have a skeleton made of:

Answer 23

Cartilage

Question 24

Amphibians evolved from ancient?

Answer 24

lobe-finned fishes

Question 25

Reptiles lay a shelled egg containing extraembryonic membranes, including?

Answer 25

Amnion

Question 26

Birds are feathered reptiles that maintain a constant body temperature, also known as

Answer 26

endothermic

Question 27

Mammals are amniotes that have:

Answer 27

Mammary Glands

Question 28

Placental mammals retain offspring inside the uterus until birth, while monotremes:
a. Lay eggs
b. Have a pouch for offspring
c. Give live birth
d. Nurse their young externally

Answer 28

a. Lay eggs