Botany MCQs for NEET — Practice Questions with Answers

The nucellus is a mass of parenchymatous tissue found in the ovule of seed plants. It provides nourishment to the developing embryo sac and is a key tissue in the reproductive structure of the plant.

A typical anther is bilobed, meaning it has two lobes. Each lobe typically contains two microsporangia, making a total of four microsporangia in a typical anther. Therefore, the correct answer is 'Two lobe Four sporangia'.

During the development of a monosporic embryo sac, the nucleus of the functional megaspore undergoes three mitotic divisions to form an 8-nucleate structure. Hence, the correct answer is '3 times'.

Cross pollination leads to genetic recombination, which increases genetic diversity in the offspring. This genetic diversity can provide a better chance of survival and adaptation to changing environments. Therefore, the correct answer is 'Genetic recombination'.

Unisexual flowers have either male or female reproductive organs, but not both. This prevents self-pollination because the flowers cannot fertilize themselves. They rely on cross-pollination from another flower.

The filiform apparatus, found in the synergids of the ovule, guides the pollen tube to ensure that it reaches the egg cell for fertilization.

Coconut water is an example of free-nuclear endosperm. In this type of endosperm, nuclear divisions occur without immediate cell wall formation, resulting in a liquid endosperm.

In maize seeds, the radicle (embryonic root) is protected by a sheath called the coleorhiza. This structure helps in safeguarding the radicle as it emerges during germination. Hence, the correct answer is coleorhiza.

The stamen is homologous to the microsporophyll in plants. Both structures are involved in the production of male gametes. In flowering plants, the stamen is the male reproductive organ that produces pollen, while in gymnosperms, the microsporophyll bears the microsporangia that produce pollen grains. Thus, the correct answer is microsporophyll.

The scutellum is a shield-like cotyledon found in the embryos of grasses, particularly in the family Poaceae. It is part of the embryo that helps in the absorption of nutrients from the endosperm during germination.