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

Define Community.

Define mutualism.

Define the following term:

Parasitism

Following statements are given regarding MTP. Choose the correct options given below:

1. MTPs are generally advised during first trimester
2. MTPs are used as a contraceptive method
3. MTPs are always surgical
4. MTPs require the assistance of qualified medical personnel

In which year, MTP was legalised in India?

MTPs are considered relatively safe during the ______ weeks of pregnancy.

What is the expansion for MTP?

Which of the following cannot be detected in a developing foetus by amniocentesis?

In which of the following weeks of pregnancy CVS is done?

Which of the following statements is incorrect regarding the medical termination of pregnancy (MTP)?

Surgical methods, also called sterilisation techniques are fool-poof methods be prevent pregnancy. But, it is the last option for many couples, because ______.

MTPs are considered relatively safe during the first 18 weeks of pregnancy.

Substantiate by giving two reasons as to why a holistic understanding of the flora and fauna the cropland is required before introducing an appropriate biocontrol method.

With the decline in the population of fig species it was noticed that the population of wasp species also started to decline. What is the relationship between the two and what could be the possible reason for decline of wasps?

In a pathological lab, a series of steps were undertaken for finding the gene of interest. Describe the steps, or make a flow chart showing the process of amplification of this gene of interest.

The Historic convention on Biological Diversity held in Rio de Janeiro in 1992 is known as ______.

Give a schematic labelled diagram to represent oögenesis (without descriptions)

What are the changes in the oogonia during the transition of a primary follicle to Graafian follicle?

Strict conditions are to be followed in medical termination of pregnancy (MTP) procedures. Mention two reasons.

What are the conditions in which medical termination of pregnancy is advised?