HARD
12th CBSE
IMPORTANT
Earn 100

Draw a schematic labelled diagram of a fertilised embryo sac of an angiosperm.
Describe the stages in embryo development in a dicot plant.
 

Important Questions on Model Question Papers 2

HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 26
Explain the process of transcription in a prokaryote.
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 26
(a)    Work out a dihybrid cross up to F2 generation between pea plants bearing violet coloured axial flowers and white coloured terminal flowers. Give their phenotypic ratio.
(b)    State the Mendel's law of inheritance that was derived from such a cross.
 
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 27
(a) On seeing the bad state of roads in your locality, as a student, you have recommended to the
Municipal Corporation to use polyblend.
(i) What is polyblend? Point out its raw material.
(ii) How will it be advantageous?
(b) What are e-wastes? Explain the method of their disposal.
 
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 27
(a)    Describe the Hydrarch succession.
(b)    Differentiate between primary and secondary succession in water.