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Recent questions tagged sec-c

What are the advantages of Molecular diagnosis technique?

asked Apr 9, 2019 by priyanka.clay6

1 answer

What is the main advantage of producing genetically engineered insulin?

asked Apr 9, 2019 by priyanka.clay6

1 answer

Explain giving one example, how co-extinction is one of the causes of loss of biodiversity. List the three other causes also (without description).

asked Apr 9, 2019 by priyanka.clay6

1 answer

Alien species are highly invasive and are a threat to indigenous species. Substantiate this statement with any three examples.

asked Apr 9, 2019 by priyanka.clay6

1 answer

How to conserve biodiversity?

asked Apr 9, 2019 by priyanka.clay6

1 answer

How do sanctuaries differs from national parks in terms of conservation?

asked Apr 9, 2019 by priyanka.clay6

1 answer

Would Western Ghats ecosystems be less functional if one of its tree frog species is lost forever? Substantiate your answer in the light of hypothesis proposed by Paul Ehrlich.

asked Apr 9, 2019 by priyanka.clay6

1 answer

In an experiment, the slope of regression (z) is 0.2 and in another experiment the value obtained is 1.2. Explain the two situations in respect of species area relationships.

asked Apr 9, 2019 by priyanka.clay6

1 answer

Biologists are not sure about how many prokaryotic species there might be. Give reasons.

asked Apr 9, 2019 by priyanka.clay6

1 answer

Why is the sobriquet. The Evil Quartet used in context of biodiversity? Name the members of this quartet. Why do we grieve for the genes when a species is lost

asked Apr 9, 2019 by priyanka.clay6

1 answer

What is so special about tropics that might account for their greater biological diversity?

asked Apr 8, 2019 by priyanka.clay6

1 answer

Hot spots are the regions of exceptionally high biodiversity. But they have become regions of accidental habitat loss too. Name the three hot spots of our country. Why are they called hot spot?

asked Apr 8, 2019 by priyanka.clay6

1 answer

Explain rivet popper hypothesis.name the ecologist who proposed it.

asked Apr 8, 2019 by priyanka.clay6

1 answer

A student wants to know the ploidy of coconut. After studying its different parts he inferred the ploidy of the following parts. Check whether the student is correct. <br> <br> a. Water inside the fruit - n <br> b. White Kernal - 2n <br> c. Seed coat - n <br> d. Embryo - 3n <br> e. Tepal - 2n

asked Feb 11, 2019 by priyanka.clay6

1 answer

Define triple fusion. What is the product of this process ? What does the product develop into ?

asked Feb 11, 2019 by priyanka.clay6

1 answer

Generally nucellus does not persist in mature seeds. Cite two examples which show persistence of nucellus in the seed and what name is given to the persistent nucellulus ?

asked Feb 11, 2019 by priyanka.clay6

1 answer

What do you means by seed dormancy ? What is its significance ?

asked Feb 11, 2019 by priyanka.clay6

1 answer

What are advantages of seeds to Angiosperms ?

asked Feb 11, 2019 by priyanka.clay6

1 answer

Explain free nuclear endosperm development.

asked Feb 11, 2019 by priyanka.clay6

1 answer

What is pollination and explain its types ?

asked Feb 11, 2019 by priyanka.clay6

1 answer

Explain double fertilization schematically.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Explain the structure of pollen grain.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Explain the structure of microsporangium.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Differentiate between microsporogenesis and megasporogenesis. What type of cell divisions occur in these ? Name the two structures formed at the end of these two events.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Continued self pollination leads to inbreeding depression. List three devices which flowering plants have developed to discourage self pollination.

asked Feb 11, 2019 by priyanka.clay6

1 answer

How is pollination effected in Vallisneria ?

asked Feb 11, 2019 by priyanka.clay6

1 answer

Differentiate between monoecious and dioecious plants, with an example for each.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Enumerate the steps in artificial hybridisation.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Trace the development of the mature ovule from a megaspore mother cell.

asked Feb 11, 2019 by priyanka.clay6

1 answer

Explain the phenomenon of double fertilization in angiospermic plants.

asked Feb 9, 2019 by priyanka.clay6

1 answer

List any three mechanisms plants follow to overcome inbreeding depression.

asked Feb 9, 2019 by priyanka.clay6

1 answer

"Apomictic genes are trying to be inserted in hybrid varieties". Explain.

asked Feb 9, 2019 by priyanka.clay6

1 answer

Pollination and seed formation are very crucial for fruit formation. How will you explain this statement ?

asked Feb 9, 2019 by priyanka.clay6

2 answers

What is the fate of the following in the development of fruit and seed ?

asked Feb 9, 2019 by priyanka.clay6

1 answer

Why is vegetative propagation considered as asexual reproduction? Which is better mode: Sexual or asexual? Why?

asked Feb 7, 2019 by priyanka.clay6

1 answer

Distinguish between gametogenesis and embryogenesis.

asked Feb 7, 2019 by priyanka.clay6

1 answer

Complete the flowchart with reference to the reproduction of flower.

asked Feb 7, 2019 by priyanka.clay6

1 answer

Can we consider simple cell division as a method of reproduction? What will you call this kind of reproduction? Give two examples in support of your answer.

asked Feb 7, 2019 by priyanka.clay6

1 answer

In a pond ecosystem you may find the plant with purple flowers that spread very fast to cover the entire pond within a short span of time. How does it spread? How does it harm the aquatic body?

asked Feb 7, 2019 by priyanka.clay6

1 answer

Give the term for kinds of gametes in the given figures A and B . In the figure A give the specific terms for the gametes.

asked Feb 7, 2019 by priyanka.clay6

1 answer

Give the term for the following figure A,B and C.

asked Feb 7, 2019 by priyanka.clay6

1 answer

What are oviparous and viviparous animals? Give examples.

asked Feb 7, 2019 by priyanka.clay6

1 answer

What is parthenogenesis? Give an example.

asked Feb 7, 2019 by priyanka.clay6

1 answer

Write the sexuality in the following organisms. <br> (a) Earthworm <br> (b) Cockroach <br> (c) Chara <br> (d) Marchantia <br> (e) Sweet Potato <br> (f) Leech.

asked Feb 7, 2019 by priyanka.clay6

1 answer

Explain the features exhibited by the organisms showing external fertilization to Enhance the chances of syngamy .What is the disadvantage of external fertilization ?

asked Feb 6, 2019 by priyanka.clay6

1 answer

Give any six features of the human genome.

asked Jul 23, 2017 by pady_1

1 answer

How has DDT caused decline in bird population?

asked Jul 12, 2017 by pady_1

1 answer

What is the main idea behind “Joint Forest Management Concept” introduced by the Government of I

asked Jul 12, 2017 by pady_1

1 answer

How can slash and burn agriculture become environment friendly?

asked Jul 12, 2017 by pady_1

1 answer

Why has National forest commission of India recommended a relatively larger forest cover for hills t

asked Jul 12, 2017 by pady_1

1 answer

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