12th Standard CBSE Syllabus & Materials
12th Standard CBSE
CBSE 12th Economics Government Budget and the Economy Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Interface Python with MySQL - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Database Concept - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Data Communication - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Data Structures - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Functions - New Previous year Question Papers Study Material - QB365 Set A
Published on: 05/03/2026
Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test
1.
Select the option that shows the correctly identified U, X, Y and Z in a developing dicot embryo.
X-Plumule (2n), Y-Suspensor (n), Z-Cotyledon (2n), U-Radicle (2n)
X-Plumule (2n), Y-Suspensor (2n), Z-Radicle (2n), U-Cotyledon (2n)
X-Suspensor (2n), Y-Cotyledon (2n), Z-Radicle (2n), U-Plumule (2n)
X-Cotyledon (2n), Y-Radicle (n), Z-Plumule (n), U-Suspensor (n)
2.
Which condition of gynoecium (pistil) is shown in the figures (i) and (ii) ?
(i) Multicarpellary apocarpous,
(ii) Multicarpellary syncarpous
(i) Multicarpellary syncarpous,
(ii) Multicarpellary apocarpous
(i) Bicarpellary apocarpous,
(ii) Bicarpellary syncarpous
(i) Bicarpellary syncarpous,
(ii) Bicarpellary apocarpous
3.
Match the following columns.
| Column I | Column II |
| A. Monocarpellary | 1. Free pistil |
| B. Multicarpellary | 2. Fused pistil |
| C. Syncarpous | 3. Many pistil |
| D. Apocarpous | 4. Single pistil |
| A | B | C | D |
| 1 | 2 | 3 | 4 |
| A | B | C | D |
| 4 | 3 | 2 | 1 |
| A | B | C | D |
| 3 | 4 | 2 | 1 |
| A | B | C | D |
| 4 | 3 | 1 | 2 |
4.
Match the terms in Column I with the descriptions in Column II.
| Column I | Column II |
| A. Pericarp | 1. Cotyledon in the seeds of grasses. |
| B. Pollen grains of Vallisneria |
2. Remains of nucellus in a seed. |
| C. Perisperm | 3. Mucilaginous covering. |
| D. Scutellum | 4. Wall of the true fruit. |
A - 4, B-3, C - 2, D - 1
A - 3, B - 4, C - 2, D - 1
A - 4, B - 3, C - 1, D - 2
A - 2, B - 3, C - 4, D - 1
5.
How many microspore mother cells are required to produce 1000 microspores/pollen grains?
100
150
200
250
6.
Which one of the following statements is wrong?
When pollen is shed at two-celled stage, double fertilization does not take place
Vegetative cell is larger than generative cell
pollen grains in some plants remain viable for months
Intine is made up of cellulose and pectin
7.
Both autogamy and geitonogamy are prevented in
Papaya
Cucumber
Castor
Maize
8.
In angiosperms, functional megaspore develops into
embryo sac
ovule
endosperm
pollen sac
9.
Residual persistent nucellus is known as
perisperm
pericarp
integuments
none of these
10.
The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons.
Plumule
Cotyledon
Endosperm
Aleurone Layer
11.
Does ornithophily refer to the pollination by which of the following?
Insects
Birds
Snails
Air
12.
One advantage of cleistogamy is
It leads to greater genetic diversity
Seed dispersal is more efficient and widespread.
Seed set is not dependent on pollinators
Each visit of a pollinator results in the transfer of hundreds of pollen grains.
13.
What does the filiform apparatus do at the entrance into ovule?
It brings about opening of the pollen tube
It guides pollen tube from a synergid to egg
It helps in the entry of pollen tube into a synergid
It prevents entry of more than one pollen tube into the embryo sac
14.
Identify the wrong statement regarding post-fertilization development
The ovary wall develops into pericarp
The outer integument of the ovule develop into tegmen
The fusion nucleus (triple fusion) develops into endosperm
The ovule develops into seed
The ovary develops into fruit
15.
Milky water of tender coconut is
Liquid gametes
liquid nucellus
Liquid female gametophyte
Liquid embryo
Liquid endosperm
1.
(c)
X-Suspensor (2n), Y-Cotyledon (2n), Z-Radicle (2n), U-Plumule (2n)
2.
(b)
(i) Multicarpellary syncarpous,
(ii) Multicarpellary apocarpous
3.
(b)
| A | B | C | D |
| 4 | 3 | 2 | 1 |
4.
(a)
A - 4, B-3, C - 2, D - 1
5.
(d)
250
6.
(c)
pollen grains in some plants remain viable for months
7.
(a)
Papaya
8.
(a)
embryo sac
9.
(a)
perisperm
10.
(b)
Cotyledon
11.
(b)
Birds
12.
(c)
Seed set is not dependent on pollinators
13.
(a)
It brings about opening of the pollen tube
14.
(b)
The outer integument of the ovule develop into tegmen
15.
(d)
Liquid embryo
12th Standard CBSE Syllabus & Materials
12th Standard CBSE
CBSE 12th Computer Science Python Revision Tour I - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Business Studies Planning Important Questions And Answers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Business Studies Business Environment Important Questions And Answers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Business Studies Principles of Management Important Questions And Answers Study Material - QB365 Set A
NCERT Books
Syllabus
Exam Pattern
Sample Question Papers
Previous year Question Papers
Important Notes
MCQ Practice test
NCERT Exemplers
Case study Questions
Image Based Questions
Passage based Questions
HOT Questions
Value Based Questions
Model Questions Papers
NCERT ( Book Back ) Questions
Assertion and Reason
Important Questions And Answers
CBSE 12th Standard CBSE Subjects
CBSE Standards
