Ch 2 - Definitions

Question 1

What word means the process of arranging animals or other things into groups according to their similarities?

Answer 1

classification

Question 2

Animals with backbones are called…

Answer 2

vertebrates

Question 3

Animals without backbones are called…

Answer 3

invertebrates

Question 4

Invertebrates that have an external skeleton, jointed appendages, and segmented bodies are called…

Answer 4

anthropods

Question 5

A strong, lightweight outer skeleton that provides an arthropod with protection, strength, and support is called an…

Answer 5

exoskeleton

Question 6

What is chitin?

Answer 6

Chitin is a tough material that helps make up an arthropod’s external skeleton.

Question 7

What are the tiny openings in an insect’s abdomen through which air enters the breathing tubes?

Answer 7

spiracles

Question 8

What word means a change in form?

Answer 8

metamorphosis

Question 9

What is a complete metamorphosis?

Answer 9

In a complete metamorphosis, an insect goes through the stages of egg, larva, pupa, and adult.

Question 10

What is an incomplete metamorphosis?

Answer 10

In an incomplete metamorphosis, an inset goes through the stages of egg, nymph, and adult.

Question 11

What is the process in which an insect sheds its exoskeleton during growth?

Answer 11

moulting

Question 12

What do you call a scientist who studies insects?

Answer 12

an entomologist

Question 13

What word describes an animal that is active at night?

Answer 13

nocturnal

Question 14

What is the name given to the body region of a spider that is like a head and thorax combined?

Answer 14

cephalothorax

Question 15

What are the sensitive hairs on a spider’s body that give the spider its sense of touch called?

Answer 15

setae

Question 16

What is the name of the breathing organ of a spider made up of several thin sheets of tissue filled with blood vessels?

Answer 16

a book lung

Question 17

What is the method by which young spiders sail through the air on silk strands that carry them from their place of birth?

Answer 17

ballooning

Question 18

What are the tubelike structures in spiders’ abdomens that the spider uses to make silk threads?

Answer 18

spinnerets

Question 19

What is the term for an arthropod with a hard, crusty shell?

Answer 19

crustacean

Question 20

What term describes the ability of crustaceans to replace lost body parts?

Answer 20

regeneration

Question 21

What do we call the leglike limbs connected to a lobster’s abdomen?

Answer 21

swimmerets

Question 22

What is a carnivore?

Answer 22

a flesh eater

Question 23

What is a herbivore?

Answer 23

a plant eater

Question 24

What is the term for soft-bodied invertebrates such as clams, oysters, snails, and squids?

Answer 24

mollusks

Question 25

What is the term for a mollusk such as a small snail or slug that has a muscular foot that they use to slide forward on a layer of slime?

Answer 25

gastropod

Question 26

What word describes one-shelled mollusks, such as snail, conch, or cowrie?

Answer 26

univalves

Question 27

What word describes mollusks with two matching, fan-shaped shells joined by hinges, such as mussels, oysters, and scallops?

Answer 27

bivalves

Question 28

What is the name for the group of mollusks in which the foot and head are combined into a single headlike structure?

Answer 28

cephalopods

Question 29

What is the name for the miniature invertebrate made up of one cell?

Answer 29

protozoan

Question 30

What is a cell?

Answer 30

A cell is the smallest living unit in any living organism.

Question 31

What do we call the part of a cell that surrounds and protects the cell and determines what may enter?

Answer 31

the cell membrane

Question 32

What do we call the jellylike fluid that fills the volume of a cell?

Answer 32

cytoplasm

Question 33

What do we call the part of a cell often located near the centre that directs the work of the cell?

Answer 33

the nucleus

Question 34

What are the threadlike structures in a cell’s nucleus that contain the insturctions for running a cell and making needed parts called?

Answer 34

chromosomes

Question 35

What do we call the projections that an amoeba uses to move from place to place? (means ‘false feet’)

Answer 35

pseudopods

Question 36

What are the tiny, hairlike structures that cover a paramecium and allow it to move called?

Answer 36

cilia