Class 12th Biology 2012 Set3 Delhi Board Paper Solution
Question 1
Mention the difference between spermiogenesis and spermiation.
Answer
Spermiogenesis: Transformation of spermatids into spermatozoa.
Spermiation: The process of release of spermatozoa from Sertoli cells into the cavity of sperminiferous tubules.
Popular Questions of Class 12th biology
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(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
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- Q:- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- Q:- Explain the Law of Dominance using a monohybrid cross.
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(c) Acrosome
(d) Sperm tail
(e) Fimbriae - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
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5-ATGCATGCATGCATGCATGCATGCATGC-3
Write down the sequence of complementary strand in 5→3 direction - Q:- What is the key difference between primary and secondary sewage treatment?
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Explain the following terms with example
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(b) Incomplete dominance