The secondary sexual characters develop in females because of:

(1) estrogen

(2) androgens

(3) absence of androgens

(4) absence of estrogens

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The cleavage divisions in humans is:

1. holoblastic, equal and indeterminate

2. holoblastic, unequal and indeterminate

3. holoblastic, equal and determinate

4. holoblastic, unequal and determinate

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Extra embryonic membranes of mammalian embryo are derived from:

1. Inner cell mass

2. Formative cells

3. Trophoblast cells

4. Follicle cells

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The testes are situated outside the abdominal cavity within a pouch called scrotum. This is necessary as:

1. The scrotum can contain lengthy ducts for the transfer of sperms

2. Scrotum helps in maintaining the low temperature of the testes necessary for spermatogenesis

3. Scrotum reduces the pressure around testes necessary for spermatogenesis

4. Scrotum can store huge amounts of sperms

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Each seminiferous tubule is lined on its inside by:

1. Spermatogonia

2. Primary spermatocytes

3. Sertoli cells

4. Both 1 and 3

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Leydig cells:

1. Are present in seminiferous tubules and secrete androgens

2. Are present in seminiferous tubules and help in maturation of sperms

3. Are present in interstitial space and secrete androgens

4. Are present in interstitial space and help in maturation of sperms

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Seminal plasma is rich in:

1. Sucrose, calcium and certain enzyme

2. Glucose, sodium and certain enzymes

3. Fructose, calcium and certain enzymes

4. Fructose, sodium and certain enzymes

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Ovaries are the primary sex organs in human females because they:

I. Produce the female gamete

II. Produce the hormone that regulates the development of secondary sexual characters

1. Both I and lI

2. OnlyI

3. Only II

4. None

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Each Ovary is connected to the pelvic wall and the uterus by:

1. Peritoneum

2. Adipose tissue

3. Ligaments

4. Areolar tissue

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The final release of sperms from the seminiferous tubules is called:

1. Spermiation

2. Emission

3. Retrograde ejaculation

4. Ejaculation

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