NEET Practice Questions (MCQs) with Answers & Solutions

During seed germination, the primary root, also known as the radicle, emerges first. This is a crucial step as it enables the seedling to anchor itself and begin absorbing water and nutrients from the soil.

The rate of respiration during seed germination is rapid. This is because the growing seedling needs a large amount of energy to support various metabolic processes, which is provided through respiration.

Viviparous germination is a type of germination where the seed germinates while still attached to the parent plant. Rhizophora and Avicennia are examples of such plants, commonly found in mangrove ecosystems.

Auxin is found in high concentration in healthy leaves. Auxins are plant hormones that play a crucial role in the growth and development of plants, including cell elongation, apical dominance, and root growth. They are primarily produced in the shoot apical meristem and young leaves.

Paddy (rice) is a short-day plant. Short-day plants require a long period of darkness to flower. These plants typically flower when the night length exceeds a critical duration.

a typical angiosperm embryo sac at maturity is 7 celled 8 nucleated

Vernalization refers to the induction of a plant's flowering process by exposure to the prolonged cold of winter, or by an artificial equivalent. This process ensures that flowering occurs at the optimal time, typically in the spring, after the winter cold. Therefore, vernalization is associated with 'speedy flowering at low temperature'.

Flowering due to low temperature is known as vernalization. This is a process in which the exposure of seeds or seedlings to low temperatures promotes flowering. Vernalization is critical for plants that require a period of cold to initiate or accelerate the flowering process.

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