Growth and Development Biology Chapter 19 Mcqs Test Online Punjab Boards 12th Class

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Question 1 of 9

Biology

1. In human development, ectoderm cells migrate through the primitive streak to form:

1.Endoderm

2.The chorion

3.The yolk sac

4.Mesoderm

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Question 2 of 9

2. How does a zygote differ from an ovum?

1.A zygote has more chromosomes

2.A zygote is smaller

3.A zygote divides by meiosis

4.A zygote is much larger

Question 2 of 9

Question 3 of 9

3. Which of the following has three germ layers?

1.Gastrula

2.Embryonic disc

3.Blastula

4.Trophoblast

Question 3 of 9

Question 4 of 9

4. The process by which a tissue causes another tissue to differentiate is called:

1.Cleavage

2.Metamorphosis

3.Induction

4.Gastrulation

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Question 5 of 9

5. Which of the following are mismatched?

1.Ectoderm; circulatory system

2.Endoderm; lining of the digestive tube

3.Mesoderm; reproductive system

4.Mesoderm; notochord

Question 5 of 9

Question 6 of 9

6. Which of the following consists of both foetal and maternal tissue?

1.Allantois

2.Amnion

3.Umbilical cord

4.Placenta

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Question 7 of 9

7. A woman has several miscarriages. Her doctor suspected that a hormonal insufficiency was causing the lining of the uterus to breakdown, as does during menstruation, terminating her pregnancies. Treatment with which of the following might help her pregnancy?

1.Luteinizing hormone

2.Progesterone

3.Follicle stimulating hormone

4.Oxytocin

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Question 8 of 9

8. The end of cleavage is marked by the formation of

1.Archenteron

2.Blastula

3.Zygote

4.Three germ layers

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Question 9 of 9

9. Identical twins result from the fertilization of:

1.One ovum by one sperm

2.Two ova by two sperms

3.One ovum by two sperms

4.Two ova by one sperm

Question 9 of 9

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