What is apomixis and polyembryony? The phenomenon of asexual reproduction that imitates sexual reproduction by the formation of seed without fertilization is called apomixis or agamospermy.
What is placenta. Mention the functions of placenta. A structural and functional unit present between developing embryo (foetus) and maternal body is called placenta.
What is amniocentesis? A foetal sex-determination test based on the chromosome pattern in the cells found in amniotic fluid surrounding the developing embryo is called amniocentesis.
Describe the structure of double helix model of DNA. DNA is made up of two polynucleotide chains, where the backbone is made up of sugar and phosphate groups.
Hardy-Weinberg principle states that allelic frequencies in a population are stable and remains constant from generation to generation, i.e., gene pool (total number of genes and their alleles in a population) is constant.
Discuss the role of Microbes as biofertilizers. Rhizobium is a symbiotic bacterium that lives in the root nodules of legumes and fixes atmospheric nitrogen into organic compounds.
What are genetically modified organisms? Genetically modified organisms (GMOs) are plants, bacteria, fungi and animals whose genes have been altered by manipulation.
What is Homeostasis? The ability of an organism to maintain the constancy of its internal environment despite varying external environmental conditions.
What is an ecological succession? The sequential, gradual and predictable changes in the species composition in an area are called succession or ecological succession.
What is Montreal protocol? Montreal Protocol is an international treaty, was signed at Montreal, Canada, in 1987 to curb the emission of ozone depleting substances.
