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State any three benefits of mycorrhiza.
Concept: Microbes as Biofertilizers
What is the role of Taq-polymerase in PCR technology?
Concept: Principles of Processes of Biotechnology
Define Niche.
Concept: Population Interactions
What is leaching?
Concept: Ecosystem >> Decomposition
Lichens taking roots on bare rocks are an example of ______.
Concept: Biotic or Ecological Succession
What are ‘pioneer species’? Give two examples of them.
Concept: Biotic or Ecological Succession
Explain the following sequence of succession after a forest fire.
Concept: Biotic or Ecological Succession
Give a scientific reason:
The pyramid of energy is always upright.
Concept: Ecological Pyramids
What is Red Data Book?
Concept: Biodiversity
Ozone depletion is occurring widely in the stratosphere; it leads to an ozone hole caused mainly due to ______.
Concept: Ozone Layer Depletion
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
Concept: Loss of Biodiversity
A medicinal plant Rauwolfia vomitoria shows variations in concentration of reserpine from location to location. What type of level of biodiversity is this?
Concept: Levels of Biodiversity
Write full form of
- IUCN
- NBA
Concept: Biological Diversity Act, 2002
Give any four factors that favour high speciation at lower altitudes.
Concept: Levels of Biodiversity
With the help of any one example explain Alien species invasion as one of the causes of Biodiversity losses.
Concept: Loss of Biodiversity
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
Concept: Pollination
Define vegetative propagation.
Concept: Vegetative Reproduction or Vegetative Propagation
With the help of a suitable example, explain protandry.
Concept: Pollination
Enlist advantages and disadvantages of cross pollination
Concept: Pollination
Add a note on pollination mechanism in Salvia.
Concept: Pollination
