Lab 1

Question 1

appendages

Answer 1

any part of an animal coming from the main body

Question 2

asymmetry

Answer 2

having a body displaying

Question 3

bilateral symmetry

Answer 3

having a body displaying two similar halves

Question 4

colonial

Answer 4

a group of organisms of the same species living together

Question 5

dorso-ventrally flattened

Answer 5

from belly to back

Question 6

exoskeleton

Answer 6

an external skeleton, shell

Question 7

gelatinous

Answer 7

looks like jelly

Question 8

nematocyst

Answer 8

the stinging barb of coelenterates

Question 9

pentamerous symmetry

Answer 9

divided into 5 parts

Question 10

porous

Answer 10

full of tiny holes

Question 11

radial symmetry

Answer 11

having similar parts

Question 12

radula

Answer 12

a tongue-like toothed structure used in chewing and rasping

Question 13

segmented

Answer 13

the division of the body into similar parts

Question 14

sessile

Answer 14

attached to one place

Question 15

siphon

Answer 15

an extension of the mantle in molluscs for drawing water into the mantle cavity

Question 16

solitary

Answer 16

by oneself

Question 17

tentacles

Answer 17

long cylindrical tubes for sensory reception or food capture

Question 18

Phylum Arthropoda

Answer 18

bilateral symmetry; solitary or colonial in form, individuals of colony > 0.5 mm in size; not gelatinous; possess segmentation; exoskeleton with joined appendages

Question 19

Phylum Annelida

Answer 19

bilateral symmetry; solitary or colonial in form, individuals of colony > 0.5 mm in size; not gelatinous; possess segmentation; no exoskeleton, appendages, if present, not jointed worm-like body, possibly in a tube) if in a time, may have tentacles)