Category: HOTs

SHORT ANSWER TYPE QUESTIONS Question. Certain fungi forms symbiotic association with the roots of higher plants and both partners gain benefit from this association. How is this association beneficial to plants? Answer.a) Absorbs phosphorus from soil and passes it the plant.b) Resistance to root-borne pathogen,c) Tolerance to salinity and drought (Any three points) Question. Organic farmers […]

SHORT ANSWER TYPE QUESTION  Question. Name and explain 4 lymphoid organs present in humans.Answer.Primary lymphoid organs- bone marrow and thymus gland-immature lymphocyte differentiate into antigen sensitive lymphocytes Secondary lymphoid organ-spleen and lymph nodes-provide sites for interaction of lymphocytes with antigen Question. What is an autoimmune disease? Give an example.Answer.When body attacks self-cells ,Rheumatoid arthritis Question. Name the causative […]

Populations Very Short Answer Type Questions Question. If 8 individuals in a laboratory population of 80 fruitflies died in a week, then what would be the death rate for population for the said period?Answer.Death rate of fruitfly population for given time period will be :8/80 = 0.1 individuals per fruitfly per week. Question. Name the type of […]

Biotechnological Applications in Agriculture Very Short Answer Type Questions Question. What happens when Meloidogyne incognita consumes cells with RNAi gene?Answer. When Meloidogyne incognita consumes cells with RNAi gene, parasite cannot survive and this prevents infestation. The introduced RNAi gene forms both sense and anti-sense RNA. Two strands being complementary to each other bind and form dsRNA, leading to RNAi. Then, […]

ASSERTION-REASON TYPE QUESTIONS In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c) If […]

Inheritance of Two Genes Very Short Answer Type Questions Question. In a dihybrid cross, when would the proportion of parental gene combinations be much higher than non-parental types, as experimentally shown by Morgan and his group?Answer. When the genes involved are linked, the proportion of parental gene combinations be much higher than non-parental types in a dihybrid cross. Question. A […]

Short Answer Type Questions Question. What is double fertilisation? Answer. Double fertilisation is the fusion of two male gametes brought by a pollen tube to two different cells (egg and secondary nucleus) of central cell of the same female gametophyte in order to produce two different structures (zygote and primary endosperm nucleus). Question. Mention the exact location or […]

I. Assertion and ReasonIn each of the following questions, a statement of Assertion (A) is given by corresponding statement of Reason (R). Of the statements, mark the correct answer as(a) If both A and R are true and R is the correct explanation of A(b) If both A and R are true, but R is not the […]

Question. Embryo at 8-16 cells stage is called(a) blastula(b) morula(c) trophoblast(d) All of these Question. Rapid secretion of LH in ovulatory phase causes(a) rupturing of Graafian follicle(b) release of ova(c) ovulation(d) All of the above Question. Which of the following events is not associated with ovulation in human female? (a) Decrease in oestradiol(b) Full developement of Graafian follicle(c) Release […]

Chapter 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 […]