Question

Which one of the following alternatives represents the gametophytic phase in pinus?

• A. pinus plant
• B. Zygote
• C. Micro and mega spores
• D. Male and female cones

Answer 1

The correct option is C Micro and mega spores

In pollen sac during the formation of pollen grains, meiosis takes place, so the pollen grains are haploid. Microspore or pollengrain is the first cell of the male gametophyte. Megaspore represents the first cell of the female gametophyte produced by reduction division from megaspore mother cell. The megaspore develops into female prothallus or endosperm. Hence, they both belong to gametophytic phase.