In gymnosperms like Pinus and Cycas, the endosperm is
triploid
haploid
diploid
tetraploid
Correct answer: haploid
Solution
In gymnosperms, the so-called endosperm is actually the female gametophyte tissue, which is formed from the haploid megaspore. Therefore, it remains haploid rather than becoming triploid as in angiosperms.