Question

What is the ploidy level of the endosperm in a typical gymnosperm like Pinus?

• A. Haploid (n)
• B. Diploid (2n)
• C. Triploid (3n)
• D. Tetraploid (4n)

Hint:

Gymnosperms lack double fertilization; hence their nutritive tissue remains haploid.

Answer 1

The Correct Option is A

Concept: In gymnosperms, the nutritive tissue supporting embryo development is not a true endosperm but is derived from the female gametophyte.
Step 1: Understanding gymnosperm endosperm.}
Unlike angiosperms, gymnosperms do not undergo triple fusion.
Step 2: Determining ploidy.}
The nutritive tissue (called endosperm in a general sense) develops from the haploid female gametophyte; therefore, it is haploid (n).
Step 3: Comparison with angiosperms.}
In angiosperms, endosperm is typically triploid (3n) due to double fertilization, which is absent in gymnosperms.