Sexual Reproduction in Flowering Plants MCQs for NEET — Botany Questions with Answers

Tapetum is the inner layer of microsporangium (anther) which provides nourishment to developing pollen grain after meiotic cell division.

Coconut milk represents free-nuclear endosperm where the division of primary endosperm nucleus is not followed by formation of cell walls (cytokinesis) thus all nucleus remain free in liquid form. It is rich in plant hormone cytokinin.

Apomixis is a special mechanism found in flowering plants to produce seeds without fertilisation. It is a type of asexual reproduction which mimics the sexual reproduction and is commonly found in citrus varieties.

Nectar and pollen grains are important floral rewards to the animal pollinators such as moths, butterflies, wasps, bees, birds, etc.

Geitonogamy is a type of self pollination. In other word geitonogamy is transfer of pollen grain from the anther of one flower to the stigma of another flower of the either same or genetically similar plant.

Pollen grain are rich in nutrients. In recent years pollen tablets are used as food supplements as they are vich in isoprotein. It is used for bleeding problems, coughing, vomiting, bloody diarrhoea and brain haemorrhage. Pollen tablets are also used by athelets for instant energy.

Filliform apparatus is the finger-like pojections of synergids which are helps in the absorption and conduction of food materials from nucleus into embryo sac and directs the pollen tube towards embryo sac by secreting some chemicals.

Non-albuminous or non-endospermic seeds are those in which cotyledons are usually smaller and less developed. Such seeds are termed when most or all of the endosperm is used up much before germination. Thus, out of all examples given in the option, the non-albuminous seed is produced in pea (i.e, Pisum sativum)

Tapetum is the innermost layer of microsporangium. It nourishes the pollen grains. The inner wall of pollen grain is called intine. Endothecium is the wall around the microsporangium, which provide protection and help in dehiscence of anther to release the pollen. Sporogenous tissue is diploid. It undergoes meiotic division to form microspore tetrads.

Sexual reproduction leads to new genetic combination leading to variation in new products. Longer viability of seeds prolonged dormancy and large biomass are not related to sexual reproduction.