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Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.


In geitonogamy the pollen grains are transferred from the anther to the stigma of another flower on the same plant, thus functionally it involves cross-pollination. Since the pollen grains come from the plant it is genetically similar to autogamy.

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Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule.

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Name the type of biodiversity represented by the following:

(a) 50,000 different strains of rice in India.

(b) Estuaries and alpine meadows in India.

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An anther with malfunctioning tapetum often fails to produce viable male gametophytes. Give any one reason.

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Why sharing of injection a needle between two individuals is not recommended?

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Write the equation that helps in deriving the net primary productivity of an ecosystem.

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When and where do chorionic villi appear in humans? State their function.

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Write the importance of MOET.

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Identify the examples of convergent evolution from the following:

(i) Flippers of penguins and dolphins

(ii) Eyes of octopus and mammals

(iii) Vertebrate brains
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Why is the enzyme cellulase needed for isolating genetic material from plant cells and not from the animal cells?

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