Question Detail

BOT 102 BOT 102 Review Objective Question
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Question

What is the primary significance of double fertilisation in angiosperms?
Options
A It ensures that both sperm cells successfully fertilize egg cells.
B It produces two separate embryos from a single ovule.
C It forms both the diploid zygote (embryo) and the triploid endosperm (nutritive tissue).
Correct Answer
D It allows fertilisation to occur independently of external water.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Section 5.5.2 Pollination and Double Fertilisation explains: "One sperm cell fuses with the egg cell to form the diploid (2n) zygote, which develops into the embryo. The second sperm cell fuses with the two polar nuclei of the central cell to form a triploid (3n) endosperm, which serves as nutritive tissue for the developing embryo." This simultaneous formation of the embryo and its primary food source is the defining significance.

Hint

Double fertilisation involves two fusion events within the embryo sac. What are the products of these two fusions?

Question Info

Course: BOT 102
Topic: BOT 102 Review
Type: Objective
Difficulty: Not specified
Question 380 of 769
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