Question

Directions: Choose the correct option:
Assertion $\left(A\right)$: The prothallus of fern is heart-shaped.
Reason $\left(R\right)$: Prothallus in fern helps in the production of gametes.

• A. Both assertion$\left(A\right)$ and reason$\left(R\right)$ are true, but reason$\left(R\right)$ is not the correct explanation for assertion.
• B. Both assertion$\left(A\right)$ and reason$\left(R\right)$ are true and reason$\left(R\right)$ is the correct explanation for assertion$\left(A\right)$.
• C. Assertion$\left(A\right)$ is false and reason$\left(R\right)$ is true.
• D. Assertion$\left(A\right)$ is true and reason$\left(R\right)$ is false.

Answer 1

The correct option is A Both assertion$\left(A\right)$ and reason$\left(R\right)$ are true, but reason$\left(R\right)$ is not the correct explanation for assertion.

Correct answer: (b) Both assertion$\left(A\right)$ and reason$\left(R\right)$ are true, but reason$\left(R\right)$ is not the correct explanation for assertion.

• The leaves bear sporangia that are subtended by leaf-like appendages called sporophylls.
• The sporangia produce spores by meiosis in spore mother cells.
• The spores germinate to give rise to free-living gametophytes called prothallus.
• The prothallus bears the male and female reproductive organs that release the male and female gametes.
• Hence the correct option is (b).