Question

Fill in the blanks
A= ....
B= ....
C= ....
D= ....
E= ....
F= ....

• A. A= Fertilization, B= Meiosis, C= Fertilization, D= Meiosis, E= Fertilization, F= Meiosis
• B. A= Meiosis, B= Fertilization, C= Fertilization, D= Meiosis, E= Fertilization, F= Meiosis
• C. A= Meiosis, B= Fertilization, C= Meiosis, D= Fertilization, E= Fertilization, F= Meiosis
• D. A= Meiosis, B= Meiosis, C= Meiosis, D= Fertilization, E= Fertilization, F= Fertilization

Answer 1

Answer: (A)

A= Fertilization, B= Meiosis, C= Fertilization, D= Meiosis, E= Fertilization, F= Meiosis

In the given diagrams:
Stage-I is representing haplontic life cycle in which a zygote undergoes meiosis (B) and produces several haploid cells. These cells divide mitotically to form more haploid cells or produce gametophyte. Then, the fertilization (A) takes place between two opposite types of gametes (e.g., male and female) to become a diploid zygote.
Stage-II shows alternation of generation in which a haploid plant of the gametophyte generation produces gametes by mitosis. Two gametes fertilize (c) to produce a zygote, which develops into a diploid plant of the sporophyte generation. This sporophyte produces spores by meiosis (D). which germinate and develop into a gametophyte of the next generation.
Stage-III is representing a diplontic life cycle in which the diploid zygote divides mitotically to produce a multicellular diploid individuals. Cells from the diploid individuals then undergo meiosis(F) to produce haploid gametes. The haploid gametes do not undergo mitosis, and do not grow into a larger haploid organism. Rather, the haploid gametes fertilize (E) and produce the diploid zygote with gametes of the opposite type.

So, the correct answer is 'A= Fertilization, B= Meiosis, C= Fertilization, D= Meiosis, E= Fertilization, F= Meiosis'