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Biodiversity and Conservation Biotechnology and Its Applications Biotechnology: Principles and Processes Ecosystem Environmental Issues Evolution Human Health and Disease Human Reproduction Microbes in Human Welfare Molecular Basis of Inheritance Organisms and Populations Principles of Inheritance and Variation Reproduction in Organisms Reproductive Health Strategies for Enhancement in Food Production Unit 1- Reproduction Unit 2-Genetics and Evolution Unit 3-Biology and Human Welfare Unit 4- Biotechnology and Its Applications Unit 5- Ecology and Environment

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Free CBSE - Class 12 Biology worksheets

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1.
Define external fertilisation. Mention its disadvantages.
2.
Differentiate between a zoospore and a zygote.
3.
Differentiate between gametogenesis from embryogenesis.
4.
Describe the post-fertilisation changes in a flower.
5.
What is a bisexual flower? Collect five bisexual flowers from your neighbourhood and with the help of your teacher find out their common and scientific names.
6.
Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant that bears unisexual flowers?
7.
Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?
8.
Explain why meiosis and gametogenesis are always interlinked?
9.
Identify each part in a flowering plant and write whether it is haploid ((n)) or diploid ((2n)).
(d) Pollen ———————————
10.
Identify each part in a flowering plant and write whether it is haploid ((n)) or diploid ((2n)).
(e) Male gamete ———————————
- OR -

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Free CBSE Worksheets

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Biodiversity and Conservation Biotechnology and Its Applications Biotechnology: Principles and Processes Ecosystem Environmental Issues Evolution Human Health and Disease Human Reproduction Microbes in Human Welfare Molecular Basis of Inheritance Organisms and Populations Principles of Inheritance and Variation Reproduction in Organisms Reproductive Health Strategies for Enhancement in Food Production Unit 1- Reproduction Unit 2-Genetics and Evolution Unit 3-Biology and Human Welfare Unit 4- Biotechnology and Its Applications Unit 5- Ecology and Environment

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