Lecture 13

Question 1

Murala

Answer 1

solid ball of cells

Question 2

Animal

Answer 2

multi-cellular, heterotrophic eukaryotes. nutrients obtained by ingestion. lack cell walls. diploid and reproduce sexually

Question 3

First step in animal reproductive cycle

Answer 3

male and female haploid gametes are produced by meiosis

Question 4

Second step in animal reproductive cycle

Answer 4

egg and sperm fuse producing a zygote

Question 5

Third step in animal reproductive cycle

Answer 5

zygote divides by mitosis

Question 6

Fourth step in animal reproductive cycle

Answer 6

the blastula which is a hollow ball of cells is an early embryonic stage

Question 7

Fifth stage in animal reproductive cycle

Answer 7

one side of the baluster folds inward forming a gastrula (cleavage)

Question 8

Sixth stage in animal reproductive cycle

Answer 8

internal sac formed during gastrulation becomes the digestive tract lined by the endoderm

Question 9

Somatic cell

Answer 9

any cell in the body not used for reproduction

Question 10

Reproductive cells

Answer 10

egg or sperm

Question 11

The ectoderm in the sixth stage in animal reproductive cycle

Answer 11

outer cell layer that gives rise to the outer covering oft he animal and if present the central nervous system

Question 12

The mesoderm in the sixth stage in animal reproductive cycle

Answer 12

forms the muscles and most internal organs

Question 13

After the gastrula most animals will..

Answer 13

develop into adults

Question 14

Larva

Answer 14

immature individual that looks different than the mature adult body form

Question 15

Metamorphosis

Answer 15

in order for a larva to become an adult that reproduces sexually it undergoes a major change in body form. this is controlled by special gene sets

Question 16

How many phyla of animals are there

Answer 16

35

Question 17

Invertebrates

Answer 17

refer to animals lacking a vertebral column. most animals are invertebrates

Question 18

Vertebrates

Answer 18

have a vertebral column

Question 19

All but one of the 35 animal phyla are..

Answer 19

invertebrates

Question 20

Radial symmetry

Answer 20

body parts radiate from the center. animal has top and bottom but not right and left

Question 21

Bilateral symmetry

Answer 21

mirror image right and left sides.

Question 22

Anterior end

Answer 22

distinct head

Question 23

Posterior end

Answer 23

distinct tail

Question 24

Dorsal surface

Answer 24

back

Question 25

Ventral surface

Answer 25

bottom/stomach

Question 26

Radial animals are usually..

Answer 26

sedentary, meting their environment equally on all side

Question 27

Bilaterally structured animals have//

Answer 27

all of their sense organs located within head region and arrangements facilitates mobility

Question 28

Animals that have three tissue layers can be characterized by..

Answer 28

the presence or absence of a body cavity

Question 29

Body cavity

Answer 29

fluid filled space between the digestive tract and the outer body wall. cushions the internal organs and enables them to grow and move independently of the body wall

Question 30

Soft bodied animals have a...

Answer 30

hydrostatic skeleton

Question 31

Hydrostatic skeleton

Answer 31

non compressible fluid in the body cavity of soft bodied animals. provides a rigid structure that muscles contract against

Question 32

True coelom

Answer 32

animals that have a body cavity lined entirely by tissue from the mesoderm (segmented worm)

Question 33

Psuedocoelom

Answer 33

a body cavity lined with tissues that were not completely derived from mesoderm tissue. function just life true coeloms. (round worms)

Question 34

Acoelomates

Answer 34

no9 body cavity

Question 35

Protostomes

Answer 35

opening formed during gastrulation becomes the mouth

Question 36

Deuterostomes

Answer 36

the opening formed during gastrulation becomes the anus and the mouth develops from a second opening