Unit Test 10-11

Question 1

What are the characteristics of animals?

Answer 1

multicellularity, eukaryotic, heterotrophic, no cell walls, locomotion

Question 2

Invertebrates

Answer 2

no backbone, most primitive animals, tend to be small on land

Question 3

vertebrates

Answer 3

Chordata, have a backbone

Question 4

exoskeleton

Answer 4

outer, hard-covering that protects soft inner body(ex: crabs)

Question 5

Hydrostatic skeleton

Answer 5

soft-bodied, water contained under pressure in closed cavity(ex: jellyfish)

Question 6

endoskeleton

Answer 6

internal skeleton composed of a hard material; allows more movement(ex: birds, humans)

Question 7

Nerve net

Answer 7

very basic sense and reflex movement

Question 8

Ganglia

Answer 8

clusters of nerve cells that can coordinate responses; sometimes a simple brain

Question 9

Brain

Answer 9

centralized collection cells typically in the head area

Question 10

intracellular digestion

Answer 10

occurs within each cell; its limiting because food must be smaller than cells

Question 11

Gastrovascular cavity

Answer 11

digestive cavity with only one opening; food enters and leaves through same opening

Question 12

Digestive tract

Answer 12

digestive cavity with two openings, mouth & anus

Question 13

Asexual

Answer 13

some simple animals

Question 14

fragmentation

Answer 14

organisms split into a new organism (ex: hydra, starfish)

Question 15

parthenogenesis

Answer 15

creation of offspring from an unfertilized egg (ex: lizards,insects)

Question 16

Sexual

Answer 16

external or internal fertilization

Question 17

hermaphroditism

Answer 17

have both male & female reproductive structures

Question 18

Circulatory

Answer 18

carries materials to all cells

Question 19

What do all animals have

Answer 19

circulatory fluid(blood), tubes(blood vessels), muscular pump(heart)

Question 20

Open-circulatory system

Answer 20

fluid is pumped through open tubes and washes across body tissues (ex: insects)