Recent questions tagged sec-b

A few statements are given below followed by a set of terms. Pick the correct term and write it agai

asked Jul 20 by pady_1

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What do you understand by Snow-blindness?

asked Jul 12 by pady_1

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It is a common practice to plant trees and shrubs near the boundary walls of the buildings. What pur

asked Jul 12 by pady_1

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Name one green house gas and its possible source of production on a large scale. What are the harmfu

asked Jul 12 by pady_1

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Is it true that if the dissolved oxygen level drops to zero, the water will become septic. Give an e

asked Jul 12 by pady_1

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Is it true that carpets and curtain/drapes placed on the floor or wall surface can reduce the noise

asked Jul 12 by pady_1

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What is cultural eutrophication?

asked Jul 12 by pady_1

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Is it true that there is more solar energy available in the tropics? Explain briefly.

asked Jul 11 by pady_1

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Is it possible that productivity and diversity of natural communities remain constant over a time of

asked Jul 11 by pady_1

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Define the terms (i) Bioprospecting (ii) Endemism

asked Jul 11 by pady_1

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Why is genetic variation important in the plant Rauwolfia vomitoria?

asked Jul 11 by pady_1

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Explain as to how protection of biodiversity hot spots alone can reduce upto 30% of the current rate

asked Jul 11 by pady_1

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What accounts for the greater ecological diversity of India?

asked Jul 11 by pady_1

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Primary productivity varies from ecosystem to ecosystem. Explain.

asked Jul 11 by pady_1

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Poaching of tiger is a burning issue in today's world. What implication would this activity have on

asked Jul 11 by pady_1

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Human activities interfere with carbon cycle. List any two such activities. 

asked Jul 11 by pady_1

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What would be the reason for the faster rate of decomposition in the tropics? 

asked Jul 11 by pady_1

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Climax stage is achieved quickly in secondary succession as compared to primary succession. Why?

asked Jul 11 by pady_1

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Arrange the following as observed in vertical stratification of a forest : Grass, Shrubby plants, te

asked Jul 11 by pady_1

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In an aquarium two herbivorous species of fishes are living together feeding on phytoplanktons. As p

asked Jul 10 by pady_1

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Lianas are vascular plants rooted in the ground and maintain erectness of their stem by making use o

asked Jul 10 by pady_1

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The density of a population in a habitat per unit area is measured in different units. Write the uni

asked Jul 10 by pady_1

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Categorise the following plants into hydrophytes, halophytes, mesophytes and xerophytes. Give reason

asked Jul 10 by pady_1

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Why do submerged plants receive weaker illumination than exposed floating plants in a lake?

asked Jul 10 by pady_1

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Why do fresh water organisms have contractile vacuoles whereas majority of marine organisms lack the

asked Jul 10 by pady_1

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If a fresh water fish is placed in an aquarium containing seawater, will the fish be able to survive

asked Jul 10 by pady_1

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What is brood parasitism? Explain with the help of an example.

asked Jul 10 by pady_1

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Define Ectoparasite and endoparasite with suitable example.

asked Jul 10 by pady_1

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What is high altitude sickness? Write its symptoms. 

asked Jul 10 by pady_1

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What is a diapause and its significance?

asked Jul 10 by pady_1

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What is homeostasis? 

asked Jul 10 by pady_1

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Why do high areas have brighter sunlight and lower temperatures as compared to the plains?

asked Jul 10 by pady_1

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How is mature, functional insulin hormone different from prohormone form?<br>

asked Jul 10 by pady_1

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ELISA technique is based on the principles of antigen-antibody interaction. Can this technique be us

asked Jul 10 by pady_1

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PCR is a useful tool for early diagnosis of an infectious disease. How.

asked Jul 10 by pady_1

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Give the full form of ELISA. Which disease can be detected using it? <br>Discuss the principle under

asked Jul 10 by pady_1

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In view of the current food crisis, it is said that we need another green revolution. Highlight the

asked Jul 10 by pady_1

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Describe the role of $CaCl_2$ in the preparation of competent cells?

asked Jul 10 by pady_1

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A plasmid DNA and a linear DNA (both are of the same size) have one site for a restriction endonucle

asked Jul 10 by pady_1

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A recombinant DNA molecule was created by ligating a gene to a plasmid vector. By mistake, an exonuc

asked Jul 10 by pady_1

1 answer

Both a wine maker and a molecular biologist who has developed a recombinant vaccine claim to be biot

asked Jul 10 by pady_1

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What is meant by gene cloning?

asked Jul 10 by pady_1

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Which bacteria has been used as a clot buster? What is its mode of action?

asked Jul 9 by pady_1

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What is a broad spectrum antibiotics? Name one such antibiotic.

asked Jul 9 by pady_1

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How was penicillin discovered?

asked Jul 9 by pady_1

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Why are cyanobacteria considered useful in paddy plants?

asked Jul 9 by pady_1

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How do mycorrhizal fungi help the plants harbouring them?

asked Jul 9 by pady_1

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How has the bacterium bacillus turingiensis helped us in controlling caterpillars of insect pe

asked Jul 9 by pady_1

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Why are flocs important in biological treatment of waste water?

asked Jul 9 by pady_1

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What are the physical barriers of a cell in the protoplast fusion experiment? How are the barriers o

asked Jul 8 by pady_1

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