Respiration and Circulation MCQ with Answers: Important points: Respiration is a vital function of all living cells. It is function of the protoplasm and not confined to any particular organ or tissue. In this process food is broken down into simpler compounds such as carbon dioxide and water by an oxidative process and the energy … Read more
Origin and Evolution of Life Class 12 MCQ:. 1. Who proposed that the first form of life could have come from per- existing non-living organic molecules?a. Alfred Wallaceb. oparin and Haldanec. Charles Darwind. Louis Pasteur Answer: b Explanation: The theory of biogenesis was proposed by Oparin and Haldane. It states that life could have come from pre-existing non-living … Read more
Molecular Basis of Inheritance Class 12 MCQ: 1. Griffith worked on …………. a. Bacteriophage b. Drosophila c. Frog eggs d. Streptococci Answer : d Explanation: Griffith used two strains of pneumococcus (Streptococcus pneumoniae) bacteria which infect mice – a type III-S (smooth) which was virulent, and a type II-R (rough) strain which was nonvirulent. 2. The molecular … Read more
MCQ on Inheritance and Variation Class 12: 1. Phenotypic ratio of incomplete dominance in Mirabilis jalapa.a. 2: 1 : 1b. 1 : 2 : 1c. 3 : 1d. 2 : 2Answer: b ( 1:2:1) Explanation: In four o’clock plants (Mirabilis jalapa) we can Gross a plant with red flower petales with another with white petales, the offspring … Read more
Reproduction in lower and higher Animals MCQ with Answers Important points : Reproduction is an important characteristic of living organismns. It is the process by which an organ ism produces young individuals of its own species. Thus, maintains the conlinuity of the species. Animals may reproduce by asexual and sexual methods. Asexual reproduction takes … Read more
Reproduction in lower abd higher plants MCQ with Answer Reproduction is the process by which new individuals of a species are created from pre existing ones. Angiosperms are flowering plants in which ovules are present within ovary. Reproduction is of two types namely asexual and sexual reproduction. The reproduction which do not involve meiosis and … Read more