Class 12th Biology 2017 Set2 Delhi Board Paper Solution
Question 24
What is an age pyramid?
Answer
A population at any given time is composed of individual of different ages. If the age distribution is plotted for the population, the resulting structure is called an age pyramid.
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.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- Describe the structure of a seminiferous tubule.
- 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:- What do you think is the significance of reproductive health in a society?
- Q:-
Mention two strategies evolved to prevent self-pollination in flowers.
- Q:- Can you recall meiosis and indicate at what stage a recombinant DNA is made?
- Q:-
With the help of suitable diagram describe the logistic population growth curve.
- Q:- Give an example for:
(a) An endothermic animal
(b) An ectothermic animal
(c) An organism of benthic zone - Q:- What are sacred groves? What is their role in conservation?
- Q:- Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?
- Q:-
Consult internet and find out how to make orally active protein pharmaceutical. What is the major problem to be encountered?
- Q:- What are the major functions of male accessory ducts and glands?
- Q:- If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?