(i) What is the significance of mutation? |
(ii) Certain mutations are called silent mutation. How? |
OR |
What are linked genes? How can a pair of linked genes be identified? |
Write short notes on |
(i) Vector |
(ii) Gene gun |
(iii) rDNA technology. |
(i) How is the greenhouse effect produced? |
(ii) Explain the major harm caused by greenhouse gases. |
Explain the cause of algal bloom in a water body. How does it affect an ecosystem? |
OR |
Define the terms. |
(i) Adaptation |
(ii) Alien's rule. |
(iii) Commensalism |
A biology teacher explain about the single cell protein (SCP) to his students. After completing his lecture Kiran asked some question about SCP? |
(i) What is SCP? |
(ii) How it is important, nutritionally? |
(iii) What are the component organisms in SCP? |
(iv) What values are shown by Kiran as scientist? |
We see advertisements like 'Saheli' as a method of family planning. |
(i) What is 'Saheli'? |
(ii) What is the principle behind using it as a method to control population growth? |
(iii) How will you convenience people who say it is religiously wrong to use them to avoid pregnancy? |
(iv) Mention the advantages of it. |
OR |
(i) Give the name of the structures, parts A and B shown in the diagram below develop into. |
(ii) Explain the process of development which B undergoes in albuminous and exalbuminous seeds. Give one example of each of these seeds. |
Who coined the term 'genetic code'? What does it mean? Define genetic material. |
OR |
Describe the origin and evolution of man. |
(i) Define thermal pollution and explain why thermal pollution of water is harmful to aquatic animals? |
(ii) The use of pesticides DDT is discouraged since this chemical is found in human body. How does this chemical enter the body? |
OR |
List any 4 causes of loss of biodiversity. Explain any 2 of them. |
You need to login to perform this action.
You will be redirected in
3 sec