Chapter 32

Question 1

Tissues

Answer 1

Group of cells with common structure, or function

Question 2

Cleavage

Answer 2

Succession of mitotic cell division without cell growth between division

Question 3

Blastula

Answer 3

Multicellular embryonic stage that marks the end of cleavage stage

Question 4

Gastrulation

Answer 4

Series of cell and tissue movements where the blastula stage folds inwards forming gastrula

Question 5

Gastrula

Answer 5

Embryonic stage where formation of 3 layers occur in animals

Question 6

Which era and period did the Cambrian explosion occur

Answer 6

Era: paleozoic
Period: Cambrian

Question 7

Bilaterians

Answer 7

A clade whose members typically have 2 sided digestive tract

Question 8

Key events pertaining to animals in the mesozoic era

Answer 8

-Land animals began to grow wings
-dinosaurs emerged
-1st mammal emerged

Question 9

Key events pertaining to animals in the cenozoic era (After mass extinction)

Answer 9

• large nonflying dinosaurs and marine reptiles disappeared

Question 10

Body plan

Answer 10

Set of morphological and developmental traits that are integrated into the organism

Question 11

Radial symmetry

Answer 11

Grade of animals that are arranged around a central axis

Question 12

Bilateral symmetry

Answer 12

grade Arranged around 2 axis of symmetry

Question 13

Diploblastic

Answer 13

Embryonic cell with 2 germ layers

Question 14

Triploblastic

Answer 14

Embryonic cell with 3 germ layers

Question 15

Coelom

Answer 15

Body cavity lined by tissue derived only from mesoderm

Question 16

Hemocoel

Answer 16

Body cavity lines by tissue derived by mesoderm and endoderm

Question 17

Protostome

Answer 17

Developmental mode distinguished by the development of the mouth from blastopore

Question 18

Determinate cleavage

Answer 18

Type of embryonic development in protostomes that rigidly cast the fate of each embryonic cell very early

Question 19

Dueterostome

Answer 19

Development mode distinguished by development of anus from blastopore

Question 20

Indeterminate cleavage

Answer 20

Each cell has the capacity to develop into a complete embryo

Question 21

Archeteron

Answer 21

Endoderm-lined cavity formed during gastrulation which later becomes the digestive tract

Question 22

Blastopore

Answer 22

Opening of archenteron that typically develops into the anus in Dueterostome and mouth in protostomes

Question 23

Lophophore

Answer 23

Crown of ciliated tentacles that are for feeding

Question 24

Ecdysozoans

Answer 24

Clade of animals that go through ecdysis

Question 25

Ecdysis

Answer 25

When animals molt their exoskeleton

Question 26

Cadherin

Answer 26

A calcium dependent protein that allows for cells to adhere to another (origin of multicellularity

Question 27

Blastopore

Answer 27

Pore in gastrula

Question 28

Cephalization

Answer 28

Dev of a head