CBSE Worksheet for chapter-12 Heredity and Evolution class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of CBSE Board Worksheet for Class 10 Biology. Students of Class 10 Biology can get a free Worksheet for Class 10 Biology in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Biology in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Botany Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

For those who are preparing for NEET Exam can check the Biology MCQ for NEET.

Q1. An example of homologous organs is

1. Our arm and a dog’s fore-leg.
2. Our teeth and an elephant’s tusks.
3. Potato and runners of grass.
4. All of the above.

Q2. A trait in an organism is influenced by:

1. Paternal DNA only
2. Maternal DNA only
3. Both maternal and paternal DNA
4. Neither by paternal nor by maternal DNA

Q3. Which of the following statement is incorrect with respect to variations?

1. All variations in a species have equal chance of survival
2. Change in genetic composition results in variations
3. Selection of variations by environment factors form the basis of evolutionary process
4. Variations are minimum in asexual reproduction

Q4. One of the following has not been produced from wild cabbage by the process of artificial selection. This one is:

1. Kohlrabi
2. Cabbage
3. Spinach
4. Kale

Q5. A gradual change, over a long period, in a form of life is known as:

1. Erosion
2. Evolution
3. Revolution
4. Evaluation

Subjective Type Questions

Q6. How is the equal genetic contribution of male and female parents ensured in the progeny?

Q7. If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier ?

Q8. Why are traits acquired during the life-time of an individual not inherited ?

Q9. In evolutionary terms, can we say which among bacteria, spiders, fish and chimpanzees have a ‘better’ body design ? Why or why not ?

Q10. Explain the importance of fossils in deciding evolutionary relationships.

Q11. Study the different conclusions drawn by students of a class on the bases of observation of preserved/available specimens of plants and animals.

• Potato and sweet potato are analogues organs in plants
• Wings of insects and wings of birds an homologus organ in animals
• Wings of insects and wings of bats an analogus organs in plants organs in plants

The correct conclusion are :

1. I and II
2. II and IV
3. I and III
4. III and IV

Q12. Describe three ways in which individual with a particular trait may increase in population.

Q13. Select the evidence we have for the origin of life from inanimate matter.

Q14. What are fossils ? What do they tell us about the process of evolution ?

Q15. Explain with examples how the following are evidences in favour of evolution in organisms.

1. Homologus organs
2. Analogus organs
3. Fossils