Class 12th Biology 2012 Set2 Delhi Board Paper Solution
Question 5
When do the oogenesis and the spermatogenesis initiate in human females and males respectively?
Answer
Oogenesis is initiated during the embryonic development, spermatogenesis begins at puberty.
Popular Questions of Class 12th biology
- Q:- What is spermatogenesis? Briefly describe the process of spermatogenesis.
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals. - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
- Q:- What is DNA fingerprinting? Mention its application.
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- Q:- What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
- Q:- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- Q:- Explain the Law of Dominance using a monohybrid cross.
Recently Viewed Questions of Class 12th biology
- Q:- Differentiate between the following −
(a) Dominance and Recessive
(b) Homozygous and Heterozygous
(c) Monohybrid and Dihybrid. - Q:- What is a bisexual flower? Collect five bisexual flowers from your neighborhood and with the help of your teacher find out their common and scientific names.
- Q:- Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
- Q:- Why is apple called a false fruit? Which part(s) of the flower forms the fruit?
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- Q:- Find out through internet and popular science articles whether animals other than man have self-consciousness.
- Q:- Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?
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- Q:- List the attributes that populations but not individuals possess.
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