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Recent questions tagged sec-b
Questions
One of the easily manipulated plasmid used as a vector is pBR 322. What is the letter p, B, R and 322 signify?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
The source of EcoR I restriction enzyme is E-coli RY 13. <br> a. Give the sticky end of this bacteria <br> b. Name the source of EcoR II
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
What is the basis upon which the discipline of Biotechnology was founded by Boyer and Cohen?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
What merits do the products made using Biotechnology have? Give an example of one such product used in treatment ?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
What problem was faced in production of insulin by rDNA technology and how was it resolved?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Mention two applications of biotechnology in medicine with examples.
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Name four application of biotechnology.
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
How is use of r DNA better than using traditional methods of agriculture?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
How are transgenic animals made useful in chemical safety testing and studying diseases?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Dr.Arun developed a vitamin A rich potato through his research on genetics. <br> a. What do you call such potato plants ? <br> b. Who can approve the validity and safety of introducing potato for public uses.
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Bt toxins are insect group specific. The toxin is coded by a gene named cry. How does the genes cry IAc differ from cry IAb?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
The bacillus is not killed even after the application of insecticidal protein which is toxic. Comment.
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Some cotton plants grown by farmers are known as "Bt cotton". <br> a. What does Bt stand for ? <br> b. What is the advantage of this cotton plant ? <br> c. How did scientists achieve this ?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
GEAC is one of the organizations set up by Indian government. Write its full form and give its two objectives.
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
How is a probe used in molecular diagnosis?
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Can a disease be detected before the appearance of its symptoms.
cbsc
class 12
biology
biodiversity and its applications
sec-b
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
White Bengal tigers are protected in zoological parks. Tiger reserves are maintained in western ghats. How do these two approaches differ from each other? Mention the advantages of each one.
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Name the sociobioligist who popularized the term biodiversity. Identify the levels of biodiversity in India represented by- <br> a)Diversity amongst amphibians in eastern and western ghats. <br> b)50,000 strains of rice in India. <br> c)Presence of deserts, mangroves and coral reefs of India. <br>
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Lantana & Eichornia are examples of two weeds. How do they affect the ecosystem?
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
There are 34 biodiversity hot spots in the world. What are the criteria of selection of such hot spots?
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
National parks come under 'in situ' conservation while Zoological parks under 'ex situ' conservation. Comment.
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Amazon forests are regarded are "Lungs of the Planet". Why?
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Seeds of different genetic strains are kept for long periods in seed banks. Explain the conservative strategy involved in this process.
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
The species diversity of plants is much less than that of animals. What could be the reason for this and figure out how animals achieved greater diversifications ?
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Would the extinction of one insect pollinator affect the ecosystem? Explain.
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Columbia located near the equator has nearly 1400 species of birds while new york at 41˚ N has 105 species and Greenland at 71˚ N has only 56 species. Comment.
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
Identify a,b,c and d in the above pie diagram showing global biodiversity of plants. <br>
cbsc
class 12
biology
biodiversity and conservation
sec-b
asked
Apr 8, 2019
by
priyanka.clay6
1
answer
If one can induce parthenocarpy through the application of phytohormones, which fruit would you select to induce parthenocarpy and why ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 9, 2019
by
priyanka.clay6
1
answer
How does the flower of maize and cannabis are pollinated ? What are the features found in these flowers for such type of pollination ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 9, 2019
by
priyanka.clay6
1
answer
Your friend would like to cross-pollinate the bisexual flower. How can you guide him to be successful in his experiment ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
What will be the fate of ovule if the synergids are absent in the embryo sac ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
Why do you think that the zygote is dormant for some time in a fertilized ovule ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
How long do the seeds remain alive after they are dispersed ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
What are the stages of embryogeny in a Dicotyledonous embryo ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
How does geitonogamy differ from xenogamy in plants ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
Why is the process of fertilization in flowering plant referred to as double fertilization ? Explain.
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
How many haploid nuclei and haploid cells are present in the female gametophyte of angiosperm ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
What are the effects of pollen in some people and how are the pollen grains are being used as food supplements ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
How could pollen grains be well preserved as fossils ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
Of the eight nuclei of the embryo sac in flowering plants three are at the micropylar end. <br> How many are there at the chalazal end and how many nuclei located in the central cell ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
Identify the given figure and label the parts.
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
In what ways does the study of pollination enrich our understanding of Biology and enable us to apply it for increasing crop productivity ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
If a certain plant when introduced into a new environment neither produces seeds nor does it respond to vegetative propagation. Hoe can more plants be produced ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
Observe the following diagram and answer the questions given at the end
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
How would you explain seed set in papaya in the absence of male plant in close vicinity of a female plant ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
by
priyanka.clay6
1
answer
Give reason : <br> a. Angiosperms show the process of double fertilization. <br> b. Flowers in Salvia plants show stamens with lever mechanisms.
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 7, 2019
by
priyanka.clay6
1
answer
Note the relationship between the first two words and suggest a suitable word for the fourth place. <br> a. Euphorbia : Cyathium : Ocimum : ___________ <br> b. Mango : Eucarp : Apple : ____________
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 7, 2019
by
priyanka.clay6
1
answer
"Incompatibility is a natural barrier in the fusion of gametes". Justify the statement.
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 7, 2019
by
priyanka.clay6
1
answer
Name the asexual reproductive structures of the following: Chlamydomonas, Penicillum, Hydra, Sponge.
cbsc
class12
biology
reproduction in organism
sec-b
asked
Feb 6, 2019
by
priyanka.clay6
1
answer
Life spans of organisms are not necessarily correlated with their sizes. Explain
cbsc
class12
biology
reproduction in organism
sec-b
asked
Feb 6, 2019
by
priyanka.clay6
1
answer
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