Write the differences in following- (a) Write the causes of cancer. (b) Explain Cancer detection (c) Write the characters of cancer cells (d) Write the types of cancer

Write the differences in following- (a) Write the causes of cance…

In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.

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Differentiate following :
(a) Food chain and food web,
(b) Litter and Detritus,
(c) Primary and Secondary Productivity.

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What are the major causes of species losses in a geographical region?

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List the components of the embryo sac and mention their fate on fertilisation.

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Mention the fate of all the components of the embryo sac after fertilisation.

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Describe the difference between the structures of a dicot embryo and monocot embryo. Also draw LS of monocot and dicot seeds.

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State the Mendel’s law of inheritance that is universally acceptable.

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A. Explain how advent of biotechnology has helped in preventing infestation by nematodes and thereby increasing crop yield.

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Write critical notes on the following :
(a) Eutrophication
(b) Biological magnification
(c) Ground water depletion and measures for its replenishment

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Describe the main idea behind the biological control of pests and diseases.

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Match the items of column A with those given in column B.

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