Class 12th Biology 2014 Set1 Delhi Board Paper Solution
Question 17
Construct an age pyramid which reflects a stable growth status of human population.
Answer
The age pyramid that reflects a stable growth status of human population can be represented as follows:
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
(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.
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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.
Recently Viewed Questions of Class 12th biology
- Q:- Correct the following statements:
(a) Surgical methods of contraception prevent gamete formation.
(b) All sexually transmitted diseases are completely curable.
(c) Oral pills are very popular contraceptives among the rural women.
(d) In E. T. techniques, embryos are always transferred into the uterus. - Q:- List the harmful effects caused by alcohol/drug abuse.
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(a) Phytoplankton
(b) Zooplankton
(c) Benthos
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What is menstrual cycle? Which hormones regulate menstrual cycle?