Bio Lab Animal Biodiversity

Question 1

automorphy

Answer 1

trait only showed by itself.

Question 2

synapomorphy

Answer 2

shared derived trait

Question 3

sympleisomorphy

Answer 3

common ancestor trait

Question 4

asymmetry

Answer 4

lack of symmetry

Question 5

bilateral symmetry

Answer 5

organism can be split across a plane into 2 equal halves.

Question 6

radial symmetry

Answer 6

5 planes across that the organism can be split into equal parts.

Question 7

spherical symmetry

Answer 7

infinite # of planes that the organism can be split into equal halves.

Question 8

protostome

Answer 8

when the blastopore becomes the mouth

Question 9

deuterostome

Answer 9

when the blastopore becomes the anus

Question 10

hydrostatic skeleton

Answer 10

fluid filled compartment used for support

Question 11

skeleton

Answer 11

skeletal support is internal

Question 12

exoskeleton

Answer 12

skeletal support is external

Question 13

coelom

Answer 13

body cavity is surrounded by mesoderm

Question 14

pseudocoelon

Answer 14

“fake” body cavity between the mesoderm and gut

Question 15

acoelomate

Answer 15

lack of a body cavity, but still has 3 germ layers

Question 16

ecdysis

Answer 16

molting to allow growth

Question 17

segmentation

Answer 17

the division of an organism, or portions thereof, into repeated segments

Question 18

diploblastic

Answer 18

2 germ layers (lacks mesoderm)

Question 19

triploblastic

Answer 19

all 3-germ layer

Question 20

trochophore

Answer 20

a specialized Larve known for their spherical shape and ciliated ring.