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Recent questions tagged sec-a
Questions
What do you mean by clones?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Name the structure from where every sexually reproducing organism begins their life.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Name the type of fertilization wherein the survival of the organism up to adulthood is threatened.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Name the scientific name of the plant which flower once in 12 years.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Name the stage of growth and maturity in the life of animals before they can reproduce sexually.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
The type of reproduction wherein the off springs produced are identical to each other and to the parent.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
What is the significance of reproduction?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
In a culture there is a mixture of haploid and diploid cells. It must be because of a) Generative cells b) Vegetative cells c) anther wall d) pollen cells
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Why do organisms like algae and fungi which normally adopt asexual reproduction switch over to sexual method of reproduction just before the onset of adverse conditions?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Most sugarcane varieties cultivated today are aneuploids and are sterile. But they grow and perform extremely well. Sterility in sugarcane is not of any disadvantage. Why?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
If a branch “dasheri mango” is grafted on a tree producing “desi mangoes” what type of mangoes will be borne on grafted branch& other branches of the plant?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Fertilization results in the production of zygote. Zygote is called as a vital link. Why is it called so?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Flowering varies from plant to plant. Give 2 examples in support of this statement.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Why do plants like bryophytes and pteridophytes produce a large number of male gametes?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
What is common among earthworm, leech and sponge with regard to reproductive organs?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Do haploid organisms have meiosis in their lifecycle? If yes, state when does it occur?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Why are the following called as heterogametes? Give an example.
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
How is vegetative propagation related to the following plants ?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
How is a nodal segment in sugarcane helpful as a reproductive unit?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
How is gemma cup and gemmules differ from each other?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
1
answer
Some organisms reproduce to produce genetically similar individuals. What is the type of reproduction do they follow? Why are the individuals genetically similar?
cbsc
class12
biology
reproduction in organism
sec-a
asked
Feb 5, 2019
by
priyanka.clay6
2
answers
What is the best solution for the treatment of electronic wastes?
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
What is reforestation?
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
What do you understand by biomagnification?
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
What is an algal bloom?
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
Name an industry which can cause both air and thermal pollution and as well as eutrophication.
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
Mention any two examples of plants used as wind breakers in the agricultural fields.
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
Blends of polyblend and bitumen, when used, help to increase road life by a factor of three. What is
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
What is the raw material for polyblend?
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
It is a common practice to undertake desilting of the overhead water tanks. What is the possible sou
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
Name the city in our country where the entire public road transport runs on CNG.
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
In which year was the Air (prevention and control of pollution) Act amended to include noise as air
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
Use of lead free petrol or diesel is recommended to reduce the pollution emitted by automobiles. Wha
cbse
class12
ch16
exemplar
theoryquestion
biology
sec-a
environmental issues
asked
Jul 12, 2017
by
pady_1
1
answer
How is presently occurring species extinction different from earlier mass extinctions?
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
Suggest a place where one can go to study coral reefs, mangrove vegetation and estuaries.
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
List any two major causes other than anthropogenic causes of the loss of biodiversity.
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
What is the expanded form of IUCN?
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
What does the term 'frugivorous' mean?
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
Define gene pool.
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
What does 'Red' indicate in the IUCN red list (2004)?
cbse
class12
ch15
exemplar
theoryquestion
biology
sec-a
biodiversity and conservation
asked
Jul 11, 2017
by
pady_1
1
answer
What is common to earthworm, mushroom, soil mites and dung beetle in an ecosystem?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Define self sustainability.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Give any two examples of xerarch succession.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Why the rate of assimilation of energy at the herbivore level is called secondary productivity? 
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Why are oceans least productive?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Is the common edible mushroom an autotroph or a heterotroph?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
What is the ultimate source of energy for the ecosystem?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Among bryophytes, lichens and ferns which one is a pioneer species in a xeric succession?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Name any two organisms which can occupy more than one tropic level in an ecosystem.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
Justify the pitcher plant as a producer.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11, 2017
by
pady_1
1
answer
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