Advertisements
Advertisements
प्रश्न
Define the following term:
Speciation
Define the term speciation.
Advertisements
उत्तर
The origin of new species by gradual modification is called speciation.
APPEARS IN
संबंधित प्रश्न
All organisms produce more young ones. Comment
The largest unit in which gene flow is possible is :
(1) Organism
(2) Population
(3) Species
(4) Genes
List any three drawbacks of Darwinism.
Answer the following question.
Explain ‘fitness of a species’’ as mentioned by Darwin.
In which book Darwin had published his theory of Natural selection?
Differences between organisms in a species are described as variations. Which of the following would you describe as a continuous variation?
A basket of vegetables contains carrot, potato, radish and tomato.
Which of them represent the correct homologous structures?
Study the following cross and showing self pollination in F1, fill in the blank and answer the question that follows
| Parents | RRYY | × | rryy |
| Round, Yellow | wrinkled, green | ||
| F1- | Rr Yy | × | ? |
| Round, yellow |
Match List - I with List - II.
| List - I | List II | ||
| (a) | Adaptive radiation | (i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
| (b) | Convergent evolution | (ii) | Bones of forelimbs in Man and Whale |
| (c) | Divergent evolution | (iii) | Wings of Butterfly and Bird |
| (d) | Evolution by anthropo- genic action | (iv) | Darwin Finches |
Choose the correct answer from the options given below.
Nature has a way of causing organisms that inherit advantageous traits to survive and reproduce more successfully than the ones that do not. This process is known as ______.
