Multiple Choice QuestionsMonadelphous Stamens are those which:
united into more than two bundles
united into two bundles
united into one bundle
united into one bundle
Determination of skin colour is an example of:
Co-dominance
polygenic inheritance
incomplete dominance
incomplete dominance
Haemophilia is a
Y linked disorder
Autosomal sex disorder
X linked disorder
X linked disorder
Short Answer Type“India has greater ecosystem diversity than Norway.” Do you agree with the statement? Give reasons in support of your answer.
Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organisation.
| Genetic diversity | Specific diversity |
| Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. | It is the ratio of one species population over the total number of organisms across all species in the given biome. ‘Zero’ would be infinite diversity, and ‘one’ represents only one species present. |
| A single species might show high diversity at the genetic level (E.g. Man: Chinese, Indian American, African etc.) India has more than 50,000 genetically different strains of rice and 1,000 varieties of mango. | Species diversity is a measure of the diversity within an ecological community that incorporates both species richness (the number of species in a community) and the evenness of species. |
| Genetic diversity allows species to adapt to changing environments. This diversity aims to ensure that some species survive drastic changes and thus carry on desirable genes. |
For example, the Western Ghats have a greater amphibian species diversity than the Eastern Ghats. There are more than 2,00,000 species in India of which several are confined to India (endemic). |
Multiple Choice QuestionsWhich one of the following is a characteristic feature of cropland ecosystem?
Least genetic diversity
The absence of weeds
Ecological succession
Ecological succession
Which is the National Aquatic Animal of India?
River dolphin
Blue whale
Sea-horse
Sea-horse
Which of the following is the most important cause of animals and plants being driven to extinction?
Alien species invasion
Habitat loss and fragmentation
Co-extinctions
Co-extinctions
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