BIO EXAM 3 Lec 10

Question 1

endoderm examples

Answer 1

liver, pancreas, thymus

Question 2

mesoderm examples

Answer 2

skeletal system, muscular system, notochord

Question 3

ectoderm examples

Answer 3

cornea and lens of ete, nervous system, spidermis of skin

Question 4

Triploblastic

Answer 4

has three germ layers: the ectoderm, endoderm, and mesoderm.

Question 5

Diploblastic

Answer 5

having two germ layers; ectoderm and endoderm

Question 6

endoderm develops into

Answer 6

gut lining

Question 7

mesoderm

Answer 7

source of muscles

Question 8

ectoderm

Answer 8

start of the tissue that linesthe body surface

Question 9

2 animal body plans

Answer 9

cavities, layers in embryo

Question 10

gastrula parts

Answer 10

ectoderm, mesoderm, endoderm, archendom, blastocoel,blastopore

Question 11

animal embryotic development

Answer 11

• Zygote –> eight cell stage –>blastula –> gastrulation –> blastopore

Question 12

posterar is towards the

Answer 12

tail

Question 13

dorsal body part is towards

Answer 13

upper part or back of the standinganimal

Question 14

ventral body part is towards

Answer 14

lower part of body, if standing its stomach area

Question 15

anterior body part is towards

Answer 15

the head

Question 16

body regions in bilateral animals

Answer 16

anterior, posterior, dorsal, ventral

Question 17

bilateral symmetry

Answer 17

one plane of symmetry

Question 18

radial symmetry

Answer 18

infinite planes of symmetry

Question 19

arthropods

Answer 19

most diverse species of animals

Question 20

invertabrate

Answer 20

make upover 95% of the known species ofanimals

Question 21

the vertabrates include

Answer 21

mammals,birds, reptiles, amphibians, and fishes

Question 22

animals have ___ in some stage of life

Answer 22

mobility

Question 23

most animals perform what type of reproduction

Answer 23

sexual

Question 24

animals are ____ heterotrophs

Answer 24

aerobic

Question 25

animals are

Answer 25

multicellular, most have tissues, organs, andorgan systems

Question 26

first animals

Answer 26

sponges

Question 27

Choanoflagellates are similar to a part of a sponge called

Answer 27

collar cell, choanocytes

Question 28

First animals appeared approx

Answer 28

800m years ago

Question 29

Coelom

Answer 29

a fluid or air-filled space located between the digestive tract and the outer body walldigestive tract and the outer body w

Question 30

function of coelom

Answer 30

prevent injury to internal organs, enables organs to grow and move independently of the outerorgans to grow and move independently of the outer body wallbody wall

Question 31

True coelom forms from the

Answer 31

mesoderm

Question 32

animals with a true coelom are known as

Answer 32

coelomate

Question 33

what are psuedocoelomates

Answer 33

a coelum that is formed from both the mesoderm and the endoderm

Question 34

psuedocoelomates are ancestral to

Answer 34

coeluoms

Question 35

acoelomates

Answer 35

lack a body cavity

Question 36

acoelomates are ancestral to

Answer 36

psuedoceolmates

Question 37

coelomate

Answer 37

all vertebrates; some derived groups of invertebrates (earthworms)

Question 38

psuedocoelomate animal

Answer 38

Nematoda

Question 39

acoelomate animal

Answer 39

Platyhelminthes: Planarians (most ancestral condition)

Question 40

why must acoelomate animals remain small?

Answer 40

they have no coelom so organs and skin touch and if grow there body will explode. they can grow vertically. they can only grow in length

Question 41

Protostome Development v. Deuterostome Development

Answer 41

1. Cleavage 2. Determination of earliest cells 3. Coelom Formation 4. Fate of the Blastopore***

Question 42

PDvDD cleavage

Answer 42

protostome spiral and determinat deuterostome radial and indeterminant

Question 43

PDvDD determination of earliest cells

Answer 43

protostome in earliest stages; those cells have already been designated for a specific function (determinant) deuterostome cells have yet to be given a function (stem cells)

Question 44

PDvDD fate of blastopore

Answer 44

protostome becomes mouth deuterostome becomes anus

Question 45

PDvDD coelom formation

Answer 45

protostome Mesoderms split and form coeloms deuterostome folds of archentron form coelum

Question 46

stem cell

Answer 46

not given a roll

Question 47

determinent

Answer 47

cells assignment a role in early stage

Question 48

spiral cleavage

Answer 48

cells divide in a circular motion around the polar axis

Question 49

radial cleavage

Answer 49

cells divide toward the polar axis

Question 50

All animals share a common ancestor

Answer 50

(ancestral colonial flagellate – protist)

Question 51

the most ancestral animals

Answer 51

sponges

Question 52

Eumetazoa

Answer 52

is a clade of animals with true tissues

Question 53

eumetazoa includes all animals except

Answer 53

sponges

Question 54

Most animals demonstrate

Answer 54

bilateral symmetry

Question 55

Chordates and Echinoderms are

Answer 55

deuterostomes

Question 56

deuterostome development is

Answer 56

derived

Question 57

protosome development is

Answer 57

ancestral

Question 58

Rapid mitotic division is known as

Answer 58

cleavage

Question 59

means empty in biology

Answer 59

coel

Question 60

cephalization

Answer 60

an evolutionary trend of the concentration of sense organs and nerve control towards the anterior end of a animal

Question 61

archentron

Answer 61

hallow space

Question 62

blastopore

Answer 62

entrance to archentron

Question 63

Outer layer of cells is

Answer 63

ectoderm

Question 64

Gastrula is comprised of

Answer 64

: outer layer cells(ectoderm), endoderm

Question 65

inner layer of cells is

Answer 65

endoderm