Intro To Zoology: Basic Vocab

Question 1

Vertebrate

Answer 1

-animal with a dorsal nerve chord and/or backbone

Question 2

Asymmetry

Answer 2

Body cannot be cut in half to form two (almost) identical sides.

Question 3

Radial symmetry

Answer 3

Body can be cut in half on an axis in many different ways

Question 4

Bilateral symmetry

Answer 4

Can be cut in half only once

Question 5

Segmentation

Answer 5

Body has sections that repeat

Question 6

Anterior

Answer 6

Front/head

Question 7

Posterior

Answer 7

Back/hind

Question 8

Ventral

Answer 8

Underside

Question 9

Dorsal

Answer 9

Backside

Question 10

Asexual reproduction

Answer 10

• no gene combos
• only one parent
• cloning

Question 11

Sexual reproduction

Answer 11

• gene combos

- two parents

Question 12

Hermaphrodite

Answer 12

Both male and female at same time

Question 13

Dioecious

Answer 13

Either male or female, but not both

Question 14

External fertilization

Answer 14

Outside of body in water

Question 15

Internal fertilization

Answer 15

Inside body of organism

Question 16

Endothermic (temp control)

Answer 16

• homeothermic
• warm-blooded
• create heat within body

Question 17

Ectothermic (temp control)

Answer 17

• poikilothermic
• cold-blooded
• need to warm by sunlight or environment

Question 18

Filter feeder (feeding system)

Answer 18

Takes in water and filters out particles to eat

Question 19

Invertebrate

Answer 19

• animal without a central dorsal backbone

- often have external skeletons

Question 20

Chunk feeder (feeding system)

Answer 20

Feeds on large particles of nutrients

Question 21

Embryology

Answer 21

The development of an animal after conception

Question 22

Acoelomate

Answer 22

Without a body cavity

Question 23

Pseudocoelomate

Answer 23

A body cavity that has two openings

Question 24

Blastula

Answer 24

A hollow ball of cells formed by early cells.

Question 25

Gastrula

Answer 25

Cells on one side of the blastula fold inward to form this

Question 26

Ectoderm (cell layer of Gastrula)

Answer 26

Outer layer of cells on the Gastrula

Question 27

Endoderm (cell layer of Gastrula)

Answer 27

Inner layer of cells within the Gastrula

Question 28

Protostome (cell layer of Gastrula)

Answer 28

Mouth develops from opening in the Gastrula (mollusks, arthropods, annelids)

Question 29

Deuterosome

Answer 29

Anus develops from opening in Gastrula. Mouth develops elsewhere. (Echinoderms and chordates)