Advertisements
Advertisements
Give the role of amniocentesis.
Concept: undefined >> undefined
Mention one cause for variation in nature.
Concept: undefined >> undefined
Advertisements
Explain the chemiosmotic hypothesis for ATP synthesis.
Concept: undefined >> undefined
List the advantages of biogas plants in rural areas.
Concept: undefined >> undefined
What is the role of a probe in recombinant DNA technology?
Concept: undefined >> undefined
Which one of the following factors is responsible for activation of protoxin into active Bt toxin of Bacillus thuringiensis?
Concept: undefined >> undefined
Home-made fruit juices are turbid, while the bottled ,fruit juices purchased from the market are clear. Give a reason for this difference.
Concept: undefined >> undefined
Give the name of the target pest of gene cry 1 Ac.
Concept: undefined >> undefined
The table given below shows the Area, Y-intercept and regression coefficient of the continents namely, Africa and Europe. Study the table carefully and answer the questions that follow:
| Africa | Europe | |
| Area (A) | 62,000 km sq. | 65,000 km sq. |
| Y-intercept | (C) 10 | 20 |
| Regression coefficient (Z) |
1 | 1 |
- Calculate the species richness (S) of each continent.
- Which of these continents shows a higher biodiversity?
- State any two factors that cause an increase in biodiversity.
Concept: undefined >> undefined
Which is the most commonly prescribed non-steroidal oral contraceptive pill in India?
Concept: undefined >> undefined
Assertion: E. coli was transformed by inserting the foreign DNA by using Pvul in pBR322.
Reason: It was done to make the transformed cells survive in the culture medium containing ampicillin.
Concept: undefined >> undefined
Read the passage given below carefully and answer the questions that follow:
|
The bacterium Bacillus thuringiensis serovar israelensis (Bti) is commercially prepared in various formulations such as liquid, water dispersible granules, powders, and pellets. It is used as a larvicide all over the world due to its ability to produce a toxic protein that primarily targets the larvae of mosquitoes. In Sweden, Bti has been applied on a large scale in the form of commercially available granular formulation Vecto Bac G (Valent BioScience, USA). The applications have taken place in the lower Dalalven River Area to control mass outbreaks of the floodplain mosquito Aedes sticticus. |
- Why does the toxic protein kill the insects but not the bacterium?
- Can the formulation Vecto Bac G be used to eliminate the species of mosquito referred to above? Why?
Concept: undefined >> undefined
Samson and Dorothy surveyed two islands, ‘A’ and ‘B’. They recorded the relevant data in the following format in their research folder:
| Parameter | Island A | Island B | |
| (a) | Area (A) | 45 × 103 Km2 | 12 × 105 Km2 |
| (b) | Regression co-efficient (Z) | 1 | 1 |
| (c) | Y-intercept | 20 | 10 |
- Derive the species-richness for each island.
- Which island exhibits greater biodiversity? Support your answer with a reason.
Concept: undefined >> undefined
What is mycoherbicide?
Concept: undefined >> undefined
In the following questions/statements has four suggested answers. Rewrite the correct answer
Bt cotton is resistant to:
(A) Insects
(B) Herbicides
(C) Salt
(D) Drought
Concept: undefined >> undefined
Explain the term biofortification.
Concept: undefined >> undefined
Give the biological name of the following:
Baker’s yeast
Concept: undefined >> undefined
State two advantages of vegetative propagation.
Concept: undefined >> undefined
Define Racemose inflorescence
Concept: undefined >> undefined
