Recent questions tagged botany

Flowers are zygomorphic in

asked Jan 3, 2017 by meena.p

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The coconut water and the edible part of the coconut are equivalent to

asked Jan 3, 2017 by meena.p

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Match the following groups and choose the correct option

asked Jan 3, 2017 by meena.p

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The placenta is attached to the developing seed near the

asked Jan 3, 2017 by meena.p

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The giant red wood tree (Sequoia sempervirens) is a/an

asked Jan 2, 2017 by meena.p

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The embryo sac of an endosperm is made up of

asked Jan 2, 2017 by meena.p

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Cyanobacteria are classified under

asked Jan 2, 2017 by meena.p

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Hold fast, Stipe and Frond constitute the plant body in case of

asked Jan 2, 2017 by meena.p

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Select the pairs that consists of viral diseases

asked Jan 2, 2017 by meena.p

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The living organisms can be unexceptionally distinguished from the non living things on the basis of their ability for

asked Jan 2, 2017 by meena.p

4 answers

Explain the causes for biodiversity loss.OR Look at the diagram and answer the following questions:a.)Name the ecological terms used to describe DDT accumulation at different trophic levels. b.)State an effect of DDT accumulation in birds.c)Will DDT accumulation lead to eutrophication?d)Does it affect BOD? e)Name a disease caused by the accumulation of a heavy metal.

asked Dec 28, 2016 by meena.p

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What is green house effect? Discuss the impact of green house effect on the environment.People have been actively participating in the efforts for conservation of forests: a.)Name the award instituted in respect of Amritha Devi to promote such efforts. b)Name the movement launched to protect the trees by hugging them.c) Name the step Government of India has undertaken in 1980s to work closely with the local communities for protecting and managing forests

asked Dec 28, 2016 by meena.p

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How are flocs produced in the secondary treatment plant of the sewage? Explain their role.

asked Dec 28, 2016 by meena.p

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Three enzymes are required for the metabolism of lactose. What would happen to this machinery of the operon if mutation occurs in Z gene?

asked Dec 27, 2016 by meena.p

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asked Dec 27, 2016 by meena.p

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Write the scientific name of the nematode that attacks the root of the tobacco plants.

asked Dec 27, 2016 by meena.p

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What is point mutation?

asked Dec 27, 2016 by meena.p

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Draw a labeled diagram of a L.S. of a flower to show the growth of the pollen tube reaching the egg apparatus. Pistil of the flower does not accept pollen from any other plant other than its own kind. How does it happen? Explain or Discuss the modes of action and advantages/disadvantages of hormonal contraceptives

asked Dec 27, 2016 by meena.p

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What is deforestation? Mention some of the causes and also measures taken to prevent deforestation.

asked Dec 27, 2016 by meena.p

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Nematode specific genes are introduced into the tobacco plants using Agarobacterium vectors to develop resistance in tobacco plants against nematodes. Explain the events that occur in tobacco plants to develop resistance.

asked Dec 27, 2016 by meena.p

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Read the following base sequence of a certain DNA strand and answer the questions that follow 5’-AAGAATTCAA-3’ 3’-TTCTTAAGTT-5’a. What is a palindromic sequence of DNA? b.Name the palindromic nucleotide sequence shown in the DNA strand and mention the enzyme that will recognize it.5’-AAGAATTCAA-3’ 3’-TTCTTAAGTT-5’ c.State the significance of the enzymes that identify palindromic nucleotide sequence.

asked Dec 27, 2016 by meena.p

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For what significant properties of Baculoviruses are considered as best biological control agent? Mention its importance in organic farming.

asked Dec 27, 2016 by meena.p

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Describe the elongation process of transcription in bacteria.

asked Dec 27, 2016 by meena.p

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What are sacred groves? What is their role in conservation?

asked Dec 26, 2016 by meena.p

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What are methanogens? Give an example.

asked Dec 26, 2016 by meena.p

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Expand LAB

asked Dec 26, 2016 by meena.p

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Name and explain the kind of interaction in the following: a)Algae and fungi in the lichens b)Head louse and humans c) Hermit crab and sea anemone.

asked Dec 23, 2016 by meena.p

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What is bio piracy? Give examples of bio piracy.

asked Dec 23, 2016 by meena.p

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Give an example and use of the following:a.)Free living fungi: b) Symbiotic fungi: c.)Free living bacteria

asked Dec 23, 2016 by meena.p

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A tRNA is charged with methionine. a). Name the process involved in the attachment.b)Point out the mRNA codon and anticodon on tRNA for this aminoacid c)What is heterochromatin?

asked Dec 23, 2016 by meena.p

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A farmer adds Azatobacter to the soil before sowing maize. How does it increase the yield of the maize?

asked Dec 21, 2016 by meena.p

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What is inbreeding depression? Why do self pollinated crops show the effects of inbreeding depression?

asked Dec 21, 2016 by meena.p

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Expand GEAC.

asked Dec 21, 2016 by meena.p

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How does an electrostatic precipitator work? Differentiate between predation and parasitism; commensalism and ammensalism

asked Dec 21, 2016 by meena.p

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Describe the specific adaptation of xerophytes w.r.t root, stem and leaves.

asked Dec 21, 2016 by meena.p

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What are GM crops? Highlight any 4 advantages of GM crops.

asked Dec 21, 2016 by meena.p

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What are recombinant proteins? How do bio reactors help in this production? or Why are restriction endonucleases called so? What is a palindromic sequence? How do restriction endonucleases act on palindromic sites to create ‘sticky ends’?

asked Dec 21, 2016 by meena.p

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Name the regions marked A,B and C

asked Dec 21, 2016 by meena.p

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In the figure, label X and Y and explain the functioning of the plant

asked Dec 21, 2016 by meena.p

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Draw a clover leaf structure of tRNA showing the following: a.Tyrosine attached to amino acid site. b.Anticodon for this amino acid in its correct site (codon for tyrosine is UAC) c.What does the actual structure of tRNA look like?

asked Dec 20, 2016 by meena.p

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What is photochemical smog composed of? How does it affect plants?

asked Dec 20, 2016 by meena.p

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Development of a transgenic food crop may help in solving the problem of night blindness in the developing countries, name this crop plant

asked Dec 20, 2016 by meena.p

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Describe in brief the events of sexual reproduction.Describe the process of embryo and endosperm formation in flowering plants.

asked Dec 20, 2016 by meena.p

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What are the different approaches for biodiversity conservation in India.

asked Dec 20, 2016 by meena.p

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Microbes can be used to decrease the use of chemical fertilizers and pesticides. Explain how this can be accomplished? or Name any three organic acids and the bacteria that produce them

asked Dec 20, 2016 by meena.p

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What is tissue culture? What are the steps involved in tissue culture?

asked Dec 20, 2016 by meena.p

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What will be the fate of the following structures in angiospermic plants? Ovary wall, ovule, zygote, outer integument, inner integument and primary endosperm nucleus?

asked Dec 19, 2016 by meena.p

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Name any two semi dwarf varieties of wheat introduced into all wheat growing places of India

asked Dec 19, 2016 by meena.p

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Explain the formation of an embryo sac with diagrams.or Explain the formation of an embryo sac with diagrams.

asked Dec 19, 2016 by meena.p

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How will you measure the population densities in the following cases:a)Fish in a lake b)Tiger census in a national park c)Single huge banyan tree with a large canopy

asked Dec 19, 2016 by meena.p

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