Class 12th Biology 2012 Set1 Delhi Board Paper Solution
Question 7
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
Answer
Wing of butterfly and wings of birds are analogous organs as their origin is not the same but they perform similar functions. From the above reference we can infer the evolutionary relationship between organisms.
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:-
Practise drawing various animals and plants.
- Q:- Name any two species of fungus, which are used in the production of the antibiotics.
- Q:- Why is apple called a false fruit? Which part(s) of the flower forms the fruit?
- Q:- Is the use of contraceptives justified? Give reasons.
- Q:- What are the major components of seminal plasma?
- 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:- Discuss briefly the following:
(a) Radioactive wastes
(b) Defunct ships and e-wastes
(c) Municipal solid wastes - Q:- Explain (in one or two lines) the function of the followings:
(a) Promoter
(b) tRNA
(c) Exons - Q:-
What is menstrual cycle? Which hormones regulate menstrual cycle?
- Q:- Distinguish between asexual and sexual reproduction. Why is vegetative reproduction also considered as a type of asexual reproduction?