MEDIUM
12th CBSE
IMPORTANT
Earn 100

Draw a labelled sketch of a typical biogas plant.

Important Questions on Model Question Papers 3

EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 20
Explain the term with reference to drug/alcohol abuse:
Addiction
EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 20

Explain the term with reference to drug/alcohol abuse:
Dependence

EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 20
Explain the term with reference to drug/alcohol abuse:
Withdrawal symptoms
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 21
Why is haemophilia rare in human females? Mention a clinical symptom for the disease.
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 21
Hershey and Chase carried out their experiment in three steps: (a) Infection, (b) Blending, and (c) Centrifugation. Explain each one of these steps that helped them to prove that DNA is the hereditary material.
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 22
Why do the symptoms of malaria not appear immediately after the entry of sporozoites into the human body when bitten by female Anopheles? Explain.
EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 22
Give the scientific name of the malaria parasite that causes malignant malaria in humans.
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 20 - Model Question Papers 3>MODEL QUESTION PAPER>Q 22
What is the breeding of crops for enhancing their nutritional value called? Why is the need felt for enhancing the nutritional value of the crops?