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Which structure pushes the developing embryo toward endospermto get nutrition ?
The suspensor is a structure in plant embryos that pushes the developing embryo towards the endosperm to facilitate nutrient transfer. It acts as a conduit, providing the necessary support and nutrition to the growing embryo.
Development of male gametophyte begins
The development of the male gametophyte begins before pollination. It starts with the formation of the pollen grain in the anthers. The pollen grain undergoes mitotic division to form two cells – a larger vegetative cell and a smaller generative cell, which further divides to form two sperm cells. This entire process takes place before pollination.
Which of the following is the basal part of ovule ?
Two male gametes are
Male gametes in plants are produced by the generative cell of the pollen grain through mitosis. These gametes are haploid, meaning they contain a single set of chromosomes. This ensures that after fertilization, the zygote will have the correct diploid number of chromosomes.
Tapetum provides
The tapetum is the innermost layer of the anther and provides nourishment to the developing pollen grains. It plays a crucial role in the development of viable pollen by supplying essential nutrients and enzymes.
Radicle tip is derived from
The hypophysis is a group of cells in the developing embryo that gives rise to the root cap and the apical meristem of the radicle, which is the embryonic root. Thus, the radicle tip is derived from the hypophysis.
Endotheciumin anther helps in
The endothecium is a layer of cells found in the anther of a plant. It plays a crucial role in the dehiscence of the anther, which is the process where the anther releases pollen. The endothecium cells have thickened walls that help in the splitting of the anther when it is mature, facilitating the release of pollen grains.
Which is the most resistant natural organic material ?
Sporopollenin is known to be one of the most resistant natural organic materials. It is a major component of the outer wall of spores and pollen grains. Its resistance to chemical and biological degradation makes it extremely durable, ensuring the protection of the genetic material within the spores and pollen.
Nucellus is mass of ?
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.
Typical anther normally consists of
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'.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.