Consider statements about photosynthesis: 1. Light reactions occur in the grana. 2. The Calvin cycle occurs in the stroma. 3. Oxygen is released from CO2. Which are correct? MCQ with Answer and Explanation

Explanation:
Meiosis I is the reductional division where homologous chromosomes separate, resulting in two haploid cells with duplicated chromatids. Meiosis II is equational, separating sister chromatids. Mitosis maintains the diploid number. Meiosis ensures genetic variation and gamete formation.

Explanation:
Apiculture is the maintenance of honeybee hives for honey and wax production. Sericulture involves rearing silkworms (Bombyx mori) for silk production. Pisciculture is the breeding and rearing of fish (fish farming), whereas poultry farming is the rearing of birds like chickens for meat and eggs. Therefore, statements 1 and 2 are correct, while 3 is false.

Explanation:
In gymnosperms like Pinus, the female gametophyte develops within the ovule and serves as the nutritive tissue for the developing embryo. Unlike angiosperms, where the nutritive tissue is the triploid endosperm formed after double fertilization, the gymnosperm nutritive tissue is haploid and forms before fertilization. Therefore, the edible part of a pine seed is the haploid female gametophyte.