Botany MCQs for NEET — Practice Questions with Answers

In the pollen grain of flowering plants, the generative cell (which later divides to form two male gametes) floats in the cytoplasm of the vegetative cell. The vegetative cell is responsible for forming the pollen tube.

In flowering plants, each ovule typically produces one female gamete, also known as the egg cell. This egg cell is fertilized by a male gamete (sperm cell) to form a zygote, which eventually develops into an embryo.

Strobili or cones are found in Equisetum. Equisetum, also known as horsetail, produces spores in cone-like structures called strobili, which are found at the tips of the aerial stems. This is a characteristic feature of this genus.

The hilum of the ovule represents the junction between the funicle and the ovule. The funicle is the stalk-like structure that attaches the ovule to the placenta, and the hilum is the point of attachment.

The proximal sterile part of the stamen is called the filament. The filament is the stalk that supports the anther, which is the part of the stamen that produces pollen.

The style is the sterile region between the stigma and the ovary in the structure of a flower. It serves as a conduit for pollen tubes to travel from the stigma to the ovary.

The chalaza is the region at the opposite end of the micropylar region of an ovule. It is where the integuments and nucellus are joined and provides structural support to the ovule.

Apomixis is the process of asexual reproduction that leads to seed formation without fertilization. It allows plants to produce offspring that are genetically identical to the parent plant.

In wheat plants, the root cell is diploid (2n) and has 42 chromosomes. The synergid cell is part of the female gametophyte, which is haploid (n). Therefore, it will have half the number of chromosomes as the diploid cell. So, the number of chromosomes in the synergid cell is 42/2 = 21.

The pollen tube usually enters the female gametophyte through one of the synergids. This process is known as syngamy, and it ensures that the sperm cells are delivered close to the egg cell for fertilization.