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Biology > Chap 22 > Flashcards

Chap 22 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

The head of sperm if made of …..

A

Nucleus and its capped by a membrane bound acrosome

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2
Q

What’s zona pellucida?

A

Extra cellular matrix surrounding the plasma membrane of the oocyte

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3
Q

Zona pellucida is surrounded by a few layers of follicle cells called ….

A

Corona radiata

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4
Q

Ovary

A

تخمدان

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5
Q

What are the cellular stages of development?

A
  1. cleavage resulting in multicellular embryo

2. formation of blastula

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6
Q

Cell division without growth is called

A

Cleavage

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7
Q

What is the ball of cells formed in formed in cleavage stage ?

A

Morula

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8
Q

What’s the hallow ball of cells formed after cleavage stage of development ?

A

Blastula

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9
Q

What’s the fluid-filled cavity in blastula?

A

Blastocoele

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10
Q

Vertebrate

A

مهره داران

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11
Q

What stage of tissue development is this:

Certain cells push and invaginate into blastula, creating a double layer of cells

A

Early gastrula stage

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12
Q

…..involves the formation of three layers of cells that will develop to adult organs.

A

Gastrulation

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13
Q

The outer layer of cells in early gastrula is called ….

A

Ectoderm

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14
Q

The inner layer of cells in early gastrula is called ….

A

Endoderm

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15
Q

What cellular layer of gastrula borders the gut?

A

Endoderm

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16
Q

The hole created by invagination of cells in early gastrula is called…

A

Blastopore

17
Q

What part of gastrula becomes anus in lancelet?

A

Blastopore

18
Q

How many layers of cells are present in late gastrula?

A

Three layers

Ectoderm
Mesoderm
Endoderm

19
Q

Primitive guy that forms in gastrula is called …

A

Archenteron

20
Q

…..is the space between two mesoderm layers and will later developed into …..cavity

A

Coelom

Abdominal cavity

21
Q

Ectoderm, mesoderm, endoderm are called embryonic …… …….

A

Germ layers

22
Q

Define fertilization

A

The Union of a sperm and a oocyte resulting in a zygote

Biology (14 decks)

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