Lamarck proposed that the acquired characters are passed to the offspring in the next generation.

Each species tend to produce large number of offsprings, but only the fittest can survive.

Homologous, analogous organs and embryological evidences explain evolutionary relationships.

Some traits in different organisms would be similar because they are inherited from a common ancestor.

Fossils are evidences of ancient life forms or ancient habitats which have been preserved by natural processes.

1. What are variations? How do they help organisms?

2. One student (researcher) wants to cross pure tall plant (TT) with pure dwarf (tt) plant, what would be the F1 and F2 generations? Explain.

3. One experimenter cut the tails of parent rats , what could be the the traits in offsprings? Do the daughter rats contain tails or not? Explain your argument.

4. In a mango garden a farmer saw one mango tree with full of mango fruits but with a lot of pests. he also saw another mango tree without pests but with few mangoes. But the farmer wants the mango tree with full of mango fruits and pest free. Is it possible to create new mango tree which the farmer wants? Can you explain how it is possible?

5. Explain monohybrid experiment with an example, which law of inheritance can we understand? Explain.

6. What is the law of independent assortment? Explain with an example?

7. Explain the Darwin's theory of evolution 'Natural selection' with an example?

8. What are variations? Explain with a suitable example.

9.What variations generally have you observed in the species of cow?

10. What are the characters Mendel selected for his experiments on pea plant?

11. In what way Mendel used the word 'Traits'- explain with an example.

12. What differences Mendel identified between parent and F2 generation.

13. Male is responsible for sex determination of baby - do you agree? If so write your answer with a flow chart.

14. Write a brief note on analogous organs.

15. How do scientists utilise the information about fossils?

16. Mendel selected a pea plant for his experiments. Mention the reasons in your point of view.

17. If the theory of inheritance of acquired characters proposed by Lamark was true how will the world be?

18. Collect information on the inherited traits in your family members and write a note on it.

19. Observe flowering plants in your surroundings? Write similarties and differences between them?

20. With the help of given information write your comment on evidences of evolution.
Mammals have four limbs as do birds, reptiles and amphibians. The basic structure of the limbs is similar, though it has been modified to perform different functions.

21. Collect information about carbon dating method. Discuss with your physical science teacher.