The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the microspore mother cells of the same plant shall be Option 1 : 20Option 2 : 10Option 3 : 40Option 4 : 15

Which of the following is a post-fertilization event in flowering plants? Option 1 : Transfer of pollen grainsOption 2 : Embryo developmentOption 3 : Formation of flowerOption 4 : Formation of pollen grains

There are various types of reproduction. The type of reproduction adopted by an organism depends on Option 1 : The organism’s habitat, physiology and genetic makeup.Option 2 : The habitat and morphology of the organism.Option 3 : Morphology of the organism.Option 4 : Morphology and physiology ...

Identify the incorrect statement. Option 1 : In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent.Option 2 : Zoospores are sexual reproductive structures.Option 3 : In asexual reproduction, a single parent produces offspring with or without ...

Choose the correct statement from amongst the following: Option 1 : Dioecious (hermaphrodite) organisms are seen only in animals.Option 2 : Dioecious organisms are seen only in plants.Option 3 : Dioecious organisms are seen in both plants and animals.Option 4 : Dioecious organisms are seen only ...

There is no natural death in single celled organisms like Amoeba and bacteria because Option 1 : They cannot reproduce sexually.Option 2 : They reproduce by binary fission.Option 3 : Parental body is distributed among the offspring.Option 4 : They are microscopic.

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction becausec Option 1 : Sexual reproduction is a lengthy process.Option 2 : Gametes of parents have qualitatively different genetic composition.Option 3 : Genetic material comes from parents of ...

Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because Option 1 : Nodes are shorter than internodesOption 2 : Nodes have meristematic cellsOption 3 : Nodes are located near the soilOption 4 : Nodes have non-photosynthetic cells

The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively Option 1 : 12, 24, 12Option 2 : 24, 12, 12Option 3 : 12, 24, 24Option 4 : 24, 12, 24

Given below are a few statements related to external fertilization. Choose the correct statements.i. The male and female gametes are formed and released simultaneously.ii. Only a few gametes are released into the medium.iii. Water is the medium in a majority of organisms exhibiting external ...

A multicellular, filamenteous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has Option 1 : Haploid vegetative cells and diploid gametangiaOption 2 : Diploid vegetative cells and diploid ...

Amoeba and Yeast reproduce asexually by fission and budding respectively, because they are Option 1 : Microscopic organismsOption 2 : Heterotrophic organismOption 3 : Uninucleate organismsOption 4 : Unicellular organisms