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Sexual Reproduction in Flowering Plants MCQs

Class XII Biology • NCERT Based • NEET Practice

📘 Concept Based 📝 Exam Level 🤖 AI Explanations

Question 161 of 501

📘 CLASS XII

Pollen grains of water-pollinated species are protected by:

In most of the water-pollinated species, pollen grains are protected from wetting by a mucilaginous covering.

Question 162 of 501

📘 CLASS XII

The tallest flower Amorphophallus is about:

The tallest flower of Amorphophallus (the flower itself is about 6 feet in height).

Question 163 of 501

📘 CLASS XII

In the Yucca-moth relationship, the moth deposits eggs in the:

The moth deposits its eggs in the locule of the ovary.

Question 164 of 501

📘 CLASS XII

Inbreeding depression is caused by:

Continued self-pollination result in inbreeding depression.

Question 165 of 501

📘 CLASS XII

Self-incompatibility is a mechanism that is:

The third device to prevent inbreeding is self-incompatibility. This is a genetic mechanism.

Question 166 of 501

📘 CLASS XII

If a plant is dioecious (like papaya), it prevents:

In several species such as papaya... This condition prevents both autogamy and geitonogamy.

Question 167 of 501

📘 CLASS XII

The central cell of the embryo sac becomes the:

The central cell after triple fusion becomes the primary endosperm cell (PEC).

Question 168 of 501

📘 CLASS XII

Coconut water is an example of:

The coconut water... is nothing but free-nuclear endosperm.

Question 169 of 501

📘 CLASS XII

The cylindrical portion below the cotyledons in a dicot embryo is:

The cylindrical portion below the level of cotyledons is hypocotyl.

Question 170 of 501

📘 CLASS XII

In monocot embryos, the root cap is enclosed in:

The radical and root cap enclosed in an undifferentiated sheath called coleorrhiza.