Topic-1Origin of Life on Earth and Various Related Evidences Very Short Answer Type Questions Question. State a reason for the increased population of dark coloured moths with the loss of lichens (on tree barks) during industrialization period in England.Answer : During industrialization period in England the lichens got wiped out due to air pollution and tree trunks became dark due […]
Continue ReadingVery Short Answer Type Questions Question. Give an example of a codon having dual function.Answer : AUG. Question. Name the negatively charged and positively charged components of a nucleosome.Answer : Negatively charged component is DNA, positively charged component is histone octamer. Question. Name one amino acid, which is coded by only one codon.Answer : Methionine / Tryptophan Question. Write the two […]
Continue ReadingTOPIC-1Mendelian Laws of Inheritance and ChromosomalTheory of Inheritance Very Short Answer Type Questions Question. Write technical term used in human ABO blood groups for IA, IB and i Answer : IA, IB and i are the alleles of the gene Question. How does a test cross help to determine the genotype of an individual ?Answer : Individual of unknown genotype […]
Continue ReadingVery Short Answer Type Questions Question. In case of an infertile couple, the male partner can inseminate normally but the mobility of sperms is below 40 percent. Judge, which kind of ART is suitable in this situation to form an embryo in the laboratory, without involving a donor ?Answer : Intra Cytoplasmic Sperm Injection Question. State one reason why breast […]
Continue ReadingTopic-1Male and Female Reproduction System Very Short Answer Type Questions Question. Name the pouch in which the human testes are present.Answer : Scrotum. Question. Name the cells that nourish the germ cells in the testes. Where are these located in the testes ?Answer : Name of cells—Sertoli cells.Location—They are found lining-up the inner surface of seminiferous tubules. Question. Write the location and […]
Continue ReadingVery Short Answer Type Questions Question. Give an example of a plant that came to India as a contaminant and is a cause of pollen allergy.Answer : Parthenium or carrot grass. Question. State the function of filiform apparatus found in mature embryo sac of an angiosperm.Answer : Filiform apparatus helps to guide the path of pollen tubes into […]
Continue ReadingVery Short Answer Type Question Question. Identify ‘A’ in the given diagram and state its function. Answer : ‘A’—Adventitious budsFunction — Vegetative propagation Question. Identify ‘A’ in the given diagram and state its function. Answer : ‘A’—NodesFunction — Vegetative propagation Question. Name the units of vegetative propagation in grasses and water hyacinth.Answer : Grasses : Runner.Water hyacinth : Offset. Question. […]
Continue ReadingChapter 1 Reproduction in Organisms Chapter 2 Sexual Reproduction in Flowering Plants Chapter 3 Human Reproduction Chapter 4 Reproductive Health Chapter 5 Principles of Inheritance and Variation Chapter 6 Molecular Basis of Inheritance Chapter 7 Evolution Chapter 8 Human Health and Diseases Chapter 9 Strategies for Enhancement in Food Production Chapter 10 Microbes in Human […]
Continue ReadingExercise-4A Question 1. What do you understand by refraction of light?Solution:Refraction of light refers to the shift in the direction of the light’s path when it moves from one transparent material to another. Question 2. Draw diagrams to show the refraction of light from(i) Air to glass in diagram, label the incident ray, refracted ray, and the […]
Continue ReadingExercise-11A Question 1. Define the term heat.Solution:The thermal energy of a material is the kinetic energy brought on by the random motion of its molecules. Question 2. Name the S.I. unit of heat.Solution:Joule is the S.I. unit of heat (symbol J). Question 3. Define the term calorie. How is it related to joule (the S.I. unit of heat)?Solution:The […]
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