chp. 32

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Campbell Biology
Chapter 32
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1

Animals are ________ that ingest their food.

heterotrophs

2

animals are multicellular ________.

eukaryotes

3

animal cells lack _____ ______. (NOT cell membranes)

cell walls

4

________ are groups of cells that have a common structure and/or function.

Tissues

5

after a sperm fertilizes an egg, the zygote undergoes rapid cell division called _______.

cleavage

6

cleavage leads to a formation of a ________.

bastula

7

the blastula undergoes _________, forming gastrula with different layers of embryonic tissues.

(slide 5- know what it looks like)

gastrulation

8

a ________ is a sexually immature and morphologically distinct from the adult.

larva

9

larva eventually undergoes __________.

metamorphosis

10

all animals, and only animals, have ______ ______ that regulate the development of body form.

Hox genes

11

zoologists sometimes categorize animals according to a _____ _____, a set of morphological and developmental traits.

body plan

12

Some animals have _____ ________.

(slide 10)

radial symmetry

13

two sided symmetry is called ______ _________.

(slide 10)

bilateral symmetry

14

(bilaterally symmetry)

a _____ (top) side, and a _______ (bottom) side.

dorsal, ventral

15

(bilateral symmetry)

a right and left ______ sides.

lateral

16

(bilateral symmetry)

_______ (head) and ________ (tail) ends.

anterior, posterior

17

_________, the development of a head.

Cephalization

18

During development, three ____ ______ give rise to the tissues and organs of the animals embryo.

germ layers

19

(slide 12)

...

20

Most diploblastic animals possess a _____ _______.

body cavity

21

a true body cavity is called a ______ and is derived from mesoderm.

coelom

22

__________ are animals that possess a true coelom.

Coelomates

23

a ___________ is a body cavity derived from the mesoderm and endoderm.

Pseudocoleom

24

Triploblastic animals that lack a body cavity are called ___________.

acoelomates

25

based on early development, many animals can be categorized as having ________ development or _________ development.

protostome development, deuterostome development

26

in protostome development, cleavage is _______ and ________.

spiral, determinate

27

in deuterostome development, cleavage is _________ and _________.

radial, indeterminate

28

in protostome development, the blastopore becomes the ________.

mouth

29

in deuterostome development, the blastopore becomes the _______.

anus