Week 2

Question 1

convergent Evolution

Answer 1

Independent evolution of similar characteristics in different species

Question 2

Epifaunal

Answer 2

Lives on top

Question 3

Motile

Answer 3

Uses spines to move

Question 4

Benthic

Answer 4

Living on the bottom

Question 5

Sessile

Answer 5

Stationary

Question 6

Infaunel

Answer 6

Living underground

Question 7

Tube dwelling

Answer 7

Lives within a tube

Question 8

Vermiform

Answer 8

Looks like a worm

Question 9

Planktonic

Answer 9

Too small to swim against current

Question 10

Pelagic

Answer 10

Large enough to swim against current

Question 11

Softbody

Answer 11

Unable to leave behind fossil; no bones

Question 12

Cephalization

Answer 12

Development of head

Question 13

Radial symmetry

Answer 13

Equal halves surrounding a center

Question 14

Bilateral symmetry

Answer 14

Cut in half vertical and have equal sides

Question 15

Tissues

Answer 15

Collection of cells

Question 16

Ectoderm

Answer 16

Cover embryo surface; outside skin

Question 17

Endoderm

Answer 17

Covers digestion tract

Question 18

Diploblastic

Answer 18

Has ectoderm and endoderm

Question 19

Blind gut

Answer 19

Mouth and anus is the same

Question 20

Triploblastic

Answer 20

Has ectoderm, endoderm, and Mesoderm

Question 21

Mesoderm

Answer 21

A tissue that can differentiate into different things

Question 22

Acoelomate

Answer 22

No body cavity

Question 23

Pseudocelom/gastroderm

Answer 23

A fake body in the endoderm; typically in diploblastic

Question 24

Protostome

Answer 24

Mouth develops first than anus

Question 25

Deuterostome

Answer 25

Anus develops first than mouth

Question 26

Radial cleavage

Answer 26

Daughter cells are right on top of one another; typically found in deuterostome

Question 27

Spiral cleavage

Answer 27

Daughter cells are at an angle towards one another; usually found in protostome