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
- 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:- Describe the structure of a seminiferous tubule.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- 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 is DNA fingerprinting? Mention its application.
- Q:- Two heterozygous parents are crossed. If the two loci are linked what would be the distribution of phenotypic features in F1 generation for a dihybrid cross?
- Q:- Why is the offspring formed by asexual reproduction referred to as clone?
- Q:- A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
- Q:- Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.
- Q:- What is point mutation? Give one example.
- Q:- Explain what is meant by metastasis.
- Q:- Describe the post-fertilization changes in a flower.
- Q:- Draw a well-labelled diagram of an antibody molecule.
- Q:- What is primary productivity? Give brief description of factors that affect primary productivity.