When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because:
Important Questions on Biology
1. Bt brinjal has been created by inserting a gene from a soil fungus into its genome.
2. The seeds of brinjal are terminator seeds and therefore, the farmers have to buy the seeds before every season from the seed companies.
3. There is an apprehension that the consumption of Bt brinjal may have adverse impact on health.
4. There is some concern that the introduction of Bt brinjal may have adverse effect on the biodiversity.
Select the correct answer using the codes given below:
Consider the following kinds of organisms:
1. Bacteria
2. Fungi
3. Flowering plants
Some species of which of the above kinds of organisms are employed as biopesticides:
Consider the following kinds of organisms:
1. Bat
2. Bee
3. Bird
Which of the above is/are pollinating agent/agents?
Other than resistance to pests, what are the prospects for which genetically engineered plants have been created?
To enable them to withstand drought
To increase the nutrition value of the produce
To enable them to grow and do photosynthesis in spaceships and space stations
To increase their shelf life.
Select the correct answer using the codes given below:
With reference to ‘stem cells’, frequently in the news, which of the following statement(s) is/are correct? Select the correct answer using the codes given below:
1. Stem cells can be derived from mammals only.
2. Stem cells can be used for screening new drugs.
3. Stem cells can be used for medical therapies.
Recombinant DNA Technology (Genetic Engineering) allows genes to be transferred. Select the correct answer using the codes given below:
1. across different species of plants.
2. from animals to plants.
3. from microorganisms to higher organisms.
Consider the following organisms:
1. Agaricus
2. Nostoc
3. Spirogyra
Which of the above is/are used as biofertiliser/ biofertilisers?
Which of the following statements is/are correct? Select the correct answer using the codes given below:
1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.
