Exam 2

Question 1

Acoelmate

Answer 1

Body plan that has no body cavity, space between mesoderm and endoderm is filled with cells and organic materials

Question 2

Arboreal

Answer 2

Living in trees

Question 3

Bilateral symmetry

Answer 3

A single plane divides an organism into 2 structural halves that are mirror images of each other

Question 4

Bipedalism

Answer 4

Terrestrial locomotion of 2 feet

Question 5

Cephalization

Answer 5

Evolution of a head and brain area in the anterior end of animals
Thought to be a consequence of bilateral symmetry

Question 6

Cnidocytes

Answer 6

Stinging cells

Question 7

Coelomate

Answer 7

Has a true body cavity

Question 8

Colloblasts

Answer 8

A specialized type of cell found in members of ctenophora that bursts on contact with zooplankton releasing an adhesive substance to help capture its prey

Question 9

Diurnal

Answer 9

Active during the day

Question 10

Endoskeleton

Answer 10

Internal skeleton in bony or cartilaginous skeletons in vertebrae’s

Question 11

Exoskeleton

Answer 11

External skeleton as in anthropods

Question 12

Homeothermic

Answer 12

Bird or mammal capable of maintaining a stable body temp independent of environmental temp

Question 13

Lophophore

Answer 13

Horseshoe shaped crown of ciliated tentacles that surrounds the mouth of certain spiralian animals, seen in Brachiopoda and Bryozoa

Question 14

Medusa stage

Answer 14

A free floating often umbrella shaped body form found in cnidarian animals such as jellyfish

Question 15

Nocturnal

Answer 15

Active at night

Question 16

Opposable

Answer 16

Capable of moving thumbs and fingers toward other digits on the same hand

Question 17

Poikilothermic

Answer 17

an organism that cannot regulate its body temperature except by behavioral means such as basking or burrowing.

Question 18

Polyp stage

Answer 18

A typically sessile cylindrical body form found in cnidarian animals such as hydras

Question 19

Prehensil tail

Answer 19

Capable of grasping

Question 20

Pseudocoelomate

Answer 20

A body cavity located between the endoderm and mesoderm

Question 21

Radial symmetry

Answer 21

Dividing the body to get 2 identical sections

Question 22

Segmentation

Answer 22

Division of the developing animal body into repeated units

Question 23

Tagmata

Answer 23

Compound body section of an anthropod resulting from embryonic fusion of 2 or more segments (head, thorax, abdomen)