michael

Question 1

Vertebrates

Answer 1

an animal that has a backbone

Question 2

invertebrates

Answer 2

an animal that does not have a backbone

Question 3

consumer

Answer 3

an organism that eats other organisms or organic

matter.

Question 4

Ganglion

Answer 4

a mass of nerve cells

Question 5

Gut

Answer 5

the digestive tract

Question 6

coelom

Answer 6

a body cavity that contains the internal organs

Question 7

Bilateral symmetry

Answer 7

the property of being divisible into symmetrical halves on either side of a unique plane.

Question 8

radial symmetry

Answer 8

symmetry around a central axis, as in a starfish or a tulip flower.

Question 9

Asymmetry

Answer 9

lack of equality or equivalence between parts or aspects of something

Question 10

sponges

Answer 10

They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.

Question 11

Cnidarians

Answer 11

a biological daily cycle

Question 12

flawtworms

Answer 12

are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.

Question 13

Roundworms

Answer 13

They are a diverse animal phylum inhabiting a broad range of environments.

Question 14

Mollusks

Answer 14

is the second largest phylum of invertebrate animals. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species.

Question 15

open circulatory system

Answer 15

a circulartory system in which the circulatory fluid
is not contained entirely within vessels a heart pumps
fluid through vessels that empty into spaces called
sinuses.

Question 16

closed circulatory system

Answer 16

a circulatory system in which the heart circulates blood
through a network of vessels that form a closed
loop the blood does not leave the blood vessels and
materials diffuse across the walls of the vessels

Question 17

Annelid worms

Answer 17

are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.

Question 18

exoskeleton

Answer 18

a hard external supporting structure

Question 19

compound eye

Answer 19

an eye composed of many light detectors

Question 20

antenna

Answer 20

a feeler that is on the head of an invertebrate such as a
crustancean or an insect and that senses touch taste
or smell

Question 21

metamorphosis

Answer 21

a phase in the life cycle of many animals during which

a rapid change from the immature from of an oraganism to the adult form takes place.

Question 22

endoskeleton

Answer 22

an internal skeleton made of bone and cartilage

Question 23

water vascular system

Answer 23

a system of canals filled with a watery fluid that circulates
throughout the body of an echinoderm