Chapter 11
Reproduction: How Life Continues
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

Arrange the following stages of sexual reproduction in plants in the correct order:

(A) Pollen germination on stigma

(B) Fertilisation

(C) Pollination

(D) Formation of zygote

Answer: Verified

The correct order is:

(C) Pollination → (A) Pollen germination on stigma → (B) Fertilisation → (D) Formation of zygote

Pollen grains are first transferred from the anther to the stigma. This process is called pollination. Once the pollen grain lands on the stigma, it germinates and forms a pollen tube, which grows down through the style towards the ovule. This step is called pollen germination on the stigma. Fertilisation occurs when the male gamete reaches the ovule through the pollen tube and fuses with the egg cell. This fusion results in the formation of a zygote, which is the last step in the given sequence.

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More NCERT Questions
In animals, which fertilisation method the gametes are more protected? [Pg. No. 218] If a couple uses oral contraceptive pills but not condoms, which risks remain and why? [Pg. No. 223] What protective devices can be used during sexual activity to reduce the spread of STIs? [Pg. No. 223] Rina's period occurs every 28 days. Her last period was on the 5th of March. On which day is she most likely to get her next period? [Pg. No. 222]