Advertisements
Advertisements
How is the presently occurring species extinction different from the earlier mass extinctions?
Concept: undefined >> undefined
Humans benefit from diversity of life. Give two examples.
Concept: undefined >> undefined
Advertisements
What is an endangered species? Give an example of an endangered plant and animal species each?
Concept: undefined >> undefined
What are sacred groves and their role in biodiversity conservation?
Concept: undefined >> undefined
What is an ecosystem service? List any four important ecosystem services provided by the natural ecosystems. Are you in favour or against levying a charge on the service provided by the ecosystem?
Concept: undefined >> undefined
Describe the consumptive use value of biodiversity as food, drugs and medicines, fuel and fiber with suitable examples.
Concept: undefined >> undefined
Sea Anemone gets attached to the surface of the hermit crab. The kind of population interaction exhibited in this case is ______.
Concept: undefined >> undefined
Which of the following is an example of ex-situ conservation?
Concept: undefined >> undefined
Write the observations made at the end of Connell's field, experiment on barnacles on the rocky sea coasts of Scotland.
Concept: undefined >> undefined
Name any two categories of organisms that in general are adversely affected by competition.
Concept: undefined >> undefined
Many members of genus Glomus form a mycorrhizal association with plants. Elaborate how is this association beneficial to the plants.
Concept: undefined >> undefined
Organic farmer use Trichoderma as biological control agents. Explain.
Concept: undefined >> undefined
Organic farmer use Baculovirus as biological control agents. Explain.
Concept: undefined >> undefined
Read the paragraph given below and answer and questions that follow:
| Enzyme Taq polymerase, is extracted from a eubacterial microorganism Thermus aquaticus from Yellowstone National Park in Montana, USA and isolated by Chien et al. (1976). Taq polymerase successfully replaced the DNA polymerase from E.coli that was being used in PCR earlier and this shift revolutionised the PCR technique. |
- Taq polymerase after its discovery replaced E.coli DNA polymerase in PCR technique. Explain giving reasons why was the need felt for the change?
- What is a primer and its importance in PCR?
- Write the importance of PCR as a diagnostic tool.
Concept: undefined >> undefined
Read the following paragraph and answer the questions that follow:
| Biotechnology revolves around the "gene of interest", with an objective to open various avenues for human welfare in health, medicine, pharma, agriculture etc. using different techniques, tools and processes. One of the breakthroughs of biotechnology in medicine is the gene therapy. |
- Name the human disease for which the gene therapy was used for the first time.
- Explain the steps of gene therapy carried to cure the disease using the lymphocytes of the patient. Why is this therapy not a permanent cure of the disease?
- Write the possible permanent cure of the disease by the gene therapy that is in progress.
Concept: undefined >> undefined
A Tight one-to-one relationship between many species of fig tree and certain wasps is an example of ______.
Concept: undefined >> undefined
Assertion (A): Determining the sex of an unborn child followed by MTP is an illegal practice.
Reason (R): Amniocentesis is a practice to test the presence of genetic disorders also.
Concept: undefined >> undefined
Assertion (A): Synthetic oligonucleotide polymers are used during Annealing in a PCR.
Reason (R): The primers bind to the double stranded DNA at their complementary regions.
Concept: undefined >> undefined
- Give an example of a genus of virus used as narrow spectrum insecticidal biocontrol agent.
- How does its use serve as an aid in overall integrated pest management programme?
Concept: undefined >> undefined
"Cattle and goats do not browse the Calotropis plant." Justify the statement giving reasons.
Concept: undefined >> undefined
