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

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Question 1 of 9

Biology

1. How does a zygote differ from an ovum?

1.A zygote has more chromosomes

2.A zygote is much larger

3.A zygote divides by meiosis

4.A zygote is smaller

Question 1 of 9

Question 2 of 9

2. Which of the following are mismatched?

1.Mesoderm; reproductive system

2.Ectoderm; circulatory system

3.Mesoderm; notochord

4.Endoderm; lining of the digestive tube

Question 2 of 9

Question 3 of 9

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

1.Umbilical cord

2.Placenta

3.Amnion

4.Allantois

Question 3 of 9

Question 4 of 9

4. Identical twins result from the fertilization of:

1.Two ova by one sperm

2.One ovum by two sperms

3.Two ova by two sperms

4.One ovum by one sperm

Question 4 of 9

Question 5 of 9

5. Which of the following has three germ layers?

1.Blastula

2.Embryonic disc

3.Gastrula

4.Trophoblast

Question 5 of 9

Question 6 of 9

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

1.Blastula

2.Three germ layers

3.Archenteron

4.Zygote

Question 6 of 9

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.Oxytocin

4.Follicle stimulating hormone

Question 7 of 9

Question 8 of 9

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

1.Metamorphosis

2.Cleavage

3.Gastrulation

4.Induction

Question 8 of 9

Question 9 of 9

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

1.The yolk sac

2.The chorion

3.Mesoderm

4.Endoderm

Question 9 of 9

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