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When does oogenesis begin?

A.

During pubarche

B.

During embryonic development

C.

During thelarche

D.

At birth

Answer and Explanation

The Correct Answer is B

A. During pubarche: Pubarche refers to the onset of puberty, but oogenesis (the formation of oocytes) begins much earlier, during embryonic development.

 

B. During embryonic development: Oogenesis begins during embryonic development when the female fetus's ovaries form and start producing primary oocytes. These oocytes remain in a suspended state until puberty.

 

C. During thelarche: Thelarche is the onset of breast development during puberty, but oogenesis starts long before this, during embryonic development.

 

D. At birth: While primary oocytes are present at birth, the process of oogenesis actually begins during embryonic development, not at birth.
 


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View Related questions

Correct Answer is C

Explanation

A. Destroy ingested pathogens: HCl in the stomach helps destroy ingested pathogens, providing a first line of defense against infections. Therefore, this is a correct function of HCl.

B. Convert Fe3+ to Fe2+: HCl aids in the conversion of iron from its ferric (Fe3+) to ferrous (Fe2+) form, which is more easily absorbed in the intestine. Therefore, this is a correct function of HCl.

C. Emulsify lipids: Emulsification of lipids is the function of bile, not hydrochloric acid. HCl does not emulsify lipids. This is the correct answer.

D. Activate pepsinogen to pepsin: HCl activates pepsinogen, converting it to the active enzyme pepsin, which is essential for protein digestion in the stomach. Therefore, this is a correct function of HCl.

Correct Answer is C

Explanation

A. Lactose is a sugar in breast milk and is not the only source of nutrition during the first 2-3 days postpartum.

B. Casein is a protein found in breast milk but not the sole source of nutrition for the infant.

C. Colostrum is the nutrient-rich first milk produced by the mother in the first 2-3 days postpartum and provides essential nutrients and antibodies to the newborn.

D. Meconium is the infant's first stool and not a source of nutrition.

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