Home
Class 12
BIOLOGY
Assertion. A male lacks facial and pubic...

Assertion. A male lacks facial and pubic hair
Reason. There is hyposecretion of testosterone from Leydig cells

A

Point out if, both are true with reason being correct explanation

B

both are true but reason is not correct explanation

C

assertion is true but reason is wrong

D

both are wrong

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the assertion and reason provided, we can break down the statements and analyze them step by step. ### Step 1: Analyze the Assertion The assertion states that "A male lacks facial and pubic hair." - **Understanding**: In males, facial and pubic hair are considered secondary sexual characteristics that typically develop during puberty. ### Step 2: Analyze the Reason The reason given is "There is hyposecretion of testosterone from Leydig cells." - **Understanding**: Leydig cells, located in the testes, are responsible for producing testosterone, which is crucial for the development of male secondary sexual characteristics, including facial and pubic hair. ### Step 3: Connect the Assertion and Reason - **Linking**: If there is hyposecretion (low levels) of testosterone, it would logically lead to a lack of development of secondary sexual characteristics, such as facial and pubic hair. ### Step 4: Determine the Truth Values - **Assertion**: True, as males typically have facial and pubic hair. - **Reason**: True, because low testosterone levels (hyposecretion) would prevent the development of these characteristics. ### Step 5: Evaluate the Explanation - The reason provided correctly explains the assertion. If testosterone is not secreted adequately, then the male will indeed lack facial and pubic hair. ### Conclusion Both the assertion and the reason are true, and the reason is the correct explanation for the assertion. ### Final Answer Both statements are true, and the reason is the correct explanation for the assertion. ---
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL COORDINATION AND REGULATION

    DINESH PUBLICATION ENGLISH|Exercise Check Your Grasp|10 Videos

  • CHEMICAL COORDINATION AND REGULATION

    DINESH PUBLICATION ENGLISH|Exercise Brain Teasers-V|114 Videos

  • CELL CYCLE (CELL DIVISION)

    DINESH PUBLICATION ENGLISH|Exercise BRAIN TEASERS-III|85 Videos

  • CHORDATA- PROTOCHORDATA

    DINESH PUBLICATION ENGLISH|Exercise CYG|11 Videos

Similar Questions

Explore conceptually related problems

Assertion : A male is found to be lacking facial hair and pubic hair. Reason : It is a case of hyposecretion of testosterone from Leydig's cells of testes.

Synthesis of testosterone by leydig cells is stimulated by

Name the following : The cells that secrete testosterone hormone in males.

Assertion: In honeybee, female is diploid and male is haploid. Reason: Gametes are formed by meiosis in female and by mitosis in male. a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. c) If Assertion is true but the Reason is false. d) If both Assertion and Reason are false.

Assertion: In humans, the gamete contributed by male determines whether the child produced will be male or female. Reason: Sex in humans is polygenic trait depending upon a cumulative effect of some genes on X-chromosome and some on Y-chromosome. a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. c) If Assertion is true but the Reason is false. d) If both Assertion and Reason are false.

Assertion: Mutations are necessary for the survival of the species. Reason: Lack of mutation gives a temporary advantage to a species in an unchanged environment. a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. c) If Assertion is true but the Reason is false. d) If both Assertion and Reason are false.

Assertion (A) : Amphibians have evolved from fishes . Reason (R ) : Archaeopteryx is a fossil linking fishes and amphibians (a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. (b) If both Assertion and Reason are true ,but the Reason is not the correct explanation of the Assertion. (c) If Assertion is true, but Reason is false (d) If both Assertion and Reason are false.

Assertion: Overexposure to sun tans the skin in human beings. Reason: In epidermal cells, melanin appears and saves the skin from UV rays of the sun a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. c) If Assertion is true but the Reason is false. d) If both Assertion and Reason are false.

Assertion : Formation of sperm takes place in seminiferous tubules of testes . Reason : Seminiferous tubules lined with male germ cells and sertoli cells (a) If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion . (b) If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. (c) If Assertion is True but the Reason is False . (d) If both Assertion & Reason are False. .

Assertion : Mycoplasmas are pathogenic in animals and plants. Reason : Mycoplasmas lack cell wall and can survive without oxygen. 1.If both assertion and reason and true and reason is the correct explanation of assertion. 2.If both assertion and reason and true and reason is not the correct explanation of assertion. 3.If assertion is true but reason is false. 4.If both assertion and reason are false.