Archenteron is surrounded by

1. Ectoderm

2. Endoderm

3. Mesoderm

4. Blastomere

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Correct Answer :

Endoderm

Explanation :
No Explanation available for this question

The yolk plug is formed by protusion of

1. Blastomeres

2. Ectodermal call

3. Mesodermal cells

4. Endodermal cells

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Correct Answer :

Endodermal cells

Explanation :
No Explanation available for this question

From one egg in gastrula if all endodermal cells are removed the organism will lack

1. Eyes

2. Heart

3. Brain

4. Visceral organs

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Correct Answer :

Visceral organs

Explanation :
No Explanation available for this question

The process by which one part of a developing embryo influences the differentiation of other parts is known as

1. Transduction

2. Induction

3. Metamorphosis

4. None of these

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Correct Answer :

Induction

Explanation :
No Explanation available for this question

The female hormones that causes an increased in blood vessels in the uterus and development of milk glands in the breast is

1. Luteinizing hormone

2. Follicle-stimulating hormone

3. Oestrogen

4. Progesterone

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Correct Answer :

Progesterone

Explanation :
No Explanation available for this question

Menstruation is triggered by an abrupt decline in the amount of

1. Luteinizing hormone

2. Follicle-stimulating hormone

3. Oestrogen

4. Progesterone

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Correct Answer :

Progesterone

Explanation :
No Explanation available for this question

The acrosome of a sperm contains

1. Hydrolytic enzymes

2. DNA

3. Mitochondria

4. Fructose

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Correct Answer :

Hydrolytic enzymes

Explanation :
No Explanation available for this question

The change in oxygen carrying capacity during metamorphosis is accomplished by

1. Formation of new haemoglobin which has lower affinity for oxygen

2. Changes in the plasma

3. Substances which inhibit oxygen uptake

4. None of the above

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Correct Answer :

Formation of new haemoglobin which has lower affinity for oxygen

Explanation :
No Explanation available for this question

When a piece of tissue is able to respond to an organizing substance by producing a definite tissue,e.g.,neural-plate;the process is

1. Induction

2. Competence

3. Differentiation

4. None of the above

View Answer

Correct Answer :

Induction

Explanation :
No Explanation available for this question

Spermatogenesis requires the presence of

1. Fructose

2. Progesterone

3. Testosterone

4. Tyroxine

View Answer

Correct Answer :

Testosterone

Explanation :
No Explanation available for this question

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