Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Biology

Explain any three advantages that seeds offer to angiosperms.

Why are some seeds referred to as apomictic seeds?

Explain the different ways apomictic seeds can develop, Give an example of each.

Mention one advantage of apomictic seeds to farmers.

List two essential roles of ribosomes during translation.

Briefly describe the following:

Translation

List the harmful effects caused by alcohol/drug abuse.

Why is it that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.

Name the source plant of heroin drug. How is it obtained from the plant?

Write the effects of heroin on the human body.

Write the scientific name of the source plant and the part from which opiods are extracted. What is it commonly and chemically called ?

Where in the human body are its specific receptors located ? How do opioids affect the human body ?

Answer the following question.
When a seed of orange is squeezed, many embryos, instead of one are observed. Explain how it is possible.

State what is apomixis. Write its significance. How can it be commercially used?

Apomixis is a type of reproduction that results is the development of a/an ______.

The polyembryony commonly occurs in ______.

The process of translation is ______.

The translation termination triplet is ______.

The three codons which result in the termination of polypeptide chain synthesis are ______.

During translation, activated amino acids get linked to tRNA. This process is commonly called as ______.