How do organisms reproduce Worksheet-11
Subjective questions:
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What methods will you use for growing jasmine and rose plant?
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Describe how the sex of the offspring is determined in the zygote in human beings.
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Some crop plants can be grown from a seed as well as vegetatively from stem cutting. List any four advantages of vegetative propagation in such cases.
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Show by a series of labelled sketches, the manner in which reproduction occurs in Hydra.
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What is the significance of pollination?
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Draw a diagram to show the structure of a flower.
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Name the different parts (in sequence) forming the duct system of human male reproductive system. What is the duct system for?
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Draw a diagram of longitudinal section of a pistil showing pollen germination and label the following parts.
(i) style (ii) pollen tube
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Explain the significance of the conditions in humans in which the testes remain suspended in scrotum outside the abdominal cavity.
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Leaves of Bryophyllum fallen on the ground produce new plants whereas the leaves of rose do not. Why?
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Mention any two functions of human ovary.
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What is menopause?
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Define the term unisexual and bisexual giving one example of each.
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Mention secondary sexual characters in human male and female.
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Describe menstrual cycle.
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Differentiate between menarche and menopause.
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Write the full form of IUCD, AIDS, HIV, OC.
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Define sexually transmitted disease and give two examples.
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What are the functions of sex hormones?
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Give the disadvantages of vegetative propagation in plants.
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Enumerate the process of binary fission in four steps.
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Show than spirogyra propagates by regeneration.
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What is the outcome of fertilisation? What is fertilisation otherwise known as?
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What are the two possibilities of self-pollination?
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Differentiate between the functioning of the human male and female reproductive system.
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Briefly explain the process of formation of the placenta.
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Mention any two simultaneous changes that occur side by side in the female reproductive system along with the follicular maturation.
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Name two STDs other than Syphilis and Gonorrhoea. How do they get communicated?
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What are the advantages of tissue culture?
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Bring out the differences between budding and fission.