Early Embryogenesis

Question 1

Morula

Answer 1

Solid ball of cells- step 2

Question 2

Blastula

Answer 2

Hollow ball of cells- Step 3

Question 3

Gastrula

Answer 3

The cell has three different layers the ectoderm, mesoderm, and endoderm- Step 4

Question 4

Gastrulation

Answer 4

An embryonic stage in animal development encompassing the formation of three layers, where the blastula becomes the gastrula

Question 5

Ectoderm

Answer 5

the outer germ layer that develops into skin and nervous tissue

Question 6

Mesoderm

Answer 6

middle germ layer; develops into muscles, and much of the circulatory, reproductive, and excretory systems

Question 7

Endoderm

Answer 7

the inner germ layer that develops into the lining of the digestive and respiratory systems

Question 8

Blastocoel

Answer 8

the fluid-filled cavity of a blastula

Question 9

Blastopore

Answer 9

the opening of the central cavity of an embryo in the early stage of development.

Question 10

Archenteron

Answer 10

The endoderm-lined cavity, formed during gastrulation, that develops into the digestive tract of an animal.

Question 11

Spinal Cleavage

Answer 11

Plates of cell division are diagonal to vertical axis of embryo split

Question 12

Radial Cleavage

Answer 12

Plates of cell division are parallel or perpendicular to the vertical axis of embryo split

Question 13

Protostomes vs Deuterostomes

Answer 13

Protostomes: 1st indentation develops into the mouth, anus develops from 2nd opening
Deuterostomes: 1st indentation becomes the anus, mouth develops from second opening

Question 14

Analogous Traits

Answer 14

arise when groups independently adapt to similar environments in similar ways

Question 15

Homologous Traits

Answer 15

features that are inherited from a common ancestor