Stages of Animal Development

Question 1

The development starts with the ________ and ends only with _____.

Answer 1

formation of sex cells; death

Question 2

STAGES OF ANIMAL DEVELOPMENT

Answer 2

Gametogenesis
Fertilization
Cleavage
Gastrulation
Organogenesis

Question 3

Formation of gametes

Answer 3

Gametogenesis

Question 4

Can be either spermatogenesis or oogenesis

Answer 4

Gametogenesis

Question 5

It is the union of an ovum and a spermatozoon and results in a unicellular diploid zygote.

Answer 5

Fertilization

Question 6

involves a series of mitotic divisions to produce a multicellular blastula from a unicellular zygote.

Answer 6

Cleavage

Question 7

begins with the zygote and ends with the blastocyst.

Answer 7

Cleavage

Question 8

Cleavage process

Answer 8

1. Zygote
2. 4 Cell stage
3. Morula
4. Early blastocyst
5. Implanting Blastocyst

Question 9

formation of three germ layers: ectoderm, mesoderm, and endoderm.

Answer 9

Gastrulation

Question 10

Derivatives of Germ Layers

Answer 10

endosperm
germ cells
ectoderm
mesoderm

Question 11

GERM LAYERS

Answer 11

Ectoderm
Mesoderm
Endoderm

Question 12

Nervous system (brain and spinal cord), epidermis, sense organs

Answer 12

Ectoderm - forms the exoskeleton

Question 13

muscles, bones, cartilage, circulatory, excretory, and reproductive organs

Answer 13

Mesoderm - develops into organs

Question 14

digestive and respiratory organs, endocrine glands, germ cells and gametes

Answer 14

Endoderm - forms the inner lining of organs

Question 15

Show fates of each germ layer in a typical vertebrate animal

Answer 15

Organogenesis