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Read the following statements - P . Ea...

Read the following statements -
P . Each famale foetus ovary possess a couple of billion gamete mother cells.
Q. Spermatogenesis starts at puberty
R. In semen, at least 40% sperms should have a normal shape for fertility.
How many of given statements are not true?

A

None

B

One

C

Two

D

Three

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the given statements are not true, we will analyze each statement one by one. ### Step 1: Analyze Statement P **Statement P:** "Each female fetus ovary possesses a couple of billion gamete mother cells." - In females, the primary oocytes (gamete mother cells) are formed during fetal development. - At birth, a female has about 1 to 2 million primary oocytes in each ovary, totaling around 2 to 4 million. - The claim of "a couple of billion" is incorrect. **Conclusion:** Statement P is **not true**. ### Step 2: Analyze Statement Q **Statement Q:** "Spermatogenesis starts at puberty." - Spermatogenesis is the process of sperm formation that occurs in the testes. - This process indeed begins at puberty when hormonal changes trigger the production of sperm. **Conclusion:** Statement Q is **true**. ### Step 3: Analyze Statement R **Statement R:** "In semen, at least 40% of sperms should have a normal shape for fertility." - For male fertility, it is generally accepted that at least 60% of sperm should have a normal morphology (shape). - The statement that only 40% should have a normal shape is therefore incorrect. **Conclusion:** Statement R is **not true**. ### Final Conclusion - Statement P is not true. - Statement Q is true. - Statement R is not true. Thus, **two statements (P and R) are not true**. ### Answer The number of given statements that are not true is **2**. ---
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