Biology 202 Test 3- Animal Development

Front 1

What are the 6 stages of Animal development?

Back 1

1. Gamete Formation
2. Fertilization
3. Cleavage
4. Gastrulation
5. Organogenesis
6. Growth

Front 2

What happens during Gamete formation?

Back 2

Sperm and egg forms, and matures

Front 3

What happens during the cleavage stage of development?

Back 3

The zygote subdivides

Cytoplasm is partitioned in blastomeres

Front 4

What happens during the gastrulation stage?

Back 4

the germ layer forms

Front 5

What happens during Organogenesis?

Back 5

The body organs form and cells interact and differentiate

Front 6

What happens during the final stage of development, growth?

Back 6

The organs increase in size and the adult body form is created

Front 7

What is Gametogenesis called for male and female animals?

Back 7

in testes: spermatogenesis

in ovaries: oogeneis

Front 8

is this male or female gametogenesis and what is it called?

Back 8

MALE : spermatogeneis

Front 9

What is Oligolecithal?

Back 9

Little Yolk

Front 10

What is Mesolecithal?

Back 10

Moderate Yolk

Front 11

What is Polylecithal?

Back 11

Lots of Yolk

Front 12

Polylecithal eggs exhibit _________ ___________.

Back 12

Direct development

Front 13

Isolecithal and heterolecithal eggs exhibit __________ ___________.

Back 13

Indirect development, meaning they have a larval stage

Front 14

What is a mass of blastomeres called?

Back 14

a Morula

Front 15

What is mosaic development of yolks?

Back 15

Blastomeres lack the capacity
to develop into entire embryos when isolated

Front 16

What is regulative development of yolks?

Back 16

Blastomeres have the capacity to develop into entire embryos when isolated

Front 17

After all the divided cells move to the periphery of the egg, the inside fluid filled region is called the ____________.

Back 17

Blastula

Front 18

When the blastula bends inward to create a cavity, what is that called?

Back 18

Invagination

Front 19

After invagination, there are two new cavities inside the blastula. What are they called?

Back 19

Archenteron and the Blastopore

Front 20

In Gastrulation, for protosomes the blastopore becomes the _________. It originates from __________ ____________.

Back 20

mouth

spiral cleavage

Front 21

During Gastrulation in Deuterostomes, a new _______ is formed, and an _________ may be formed (or not!) from the blastopore.

Back 21

mouth

anus

Front 22

What is the 3rd layer of the blastula called?

Back 22

The Mesoderm

Front 23

What are the 2 ways that the mesoderm can be formed?

Back 23

1. they arise from a ventral area
2. the archenteron pushes outward and forms two new cells

Front 24

A coelem is a cavity surrounded by the mesoderm and is formed two ways. What are those 2 ways?

Back 24

1. Schizocoely: the mesoderm fills up the blastocoel
2. Entercoely: the mesoderm and coelem are made at the same time

Front 25

The coelem is in most protosomes except which two?

Back 25

Acoelomates
and Pseudocoelomates

Front 26

Diploblastic animals do not have organs. They just have two tissues what are they?

Back 26

The epidermis and the gastrodermis

Front 27

What is Organogenesis?

Back 27

The differentiation of 3 embryonic layers

Front 28

What is the ectoderm?

Back 28

the nervous system and other epithelium

Front 29

What is in the endoderm?

Back 29

the digestive tube and gill arches

Front 30

What does the mesoderm do?

Back 30

it supports movement, circulatory system, urine, and reproductive organs