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Published on: 28/05/2021
QB365 Provides the HOT Question Papers for Class 12 Biology, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams
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 Test1.
Match the items in Column I with those in Column II.
| Column I | Column II |
| A. Cryopreservation | 1. Hotspot |
| B. Tropical forests | 2. In situ conservation |
| C. Endemism | 3. Ex situ conservation |
| D. Lantana | 4. Coevolution |
| E. Plant-pollinator | 5. Habitat loss |
| mutualists | 6. Alien species |
| F. Wildlife sanctuary | 7. Stellar's Sea cow |
| A | B | C | D | E | F |
| 3 | 5 | 1 | 6 | 4 | 2 |
| A | B | C | D | E | F |
| 4 | 5 | 2 | 3 | 6 | 1 |
| A | B | C | D | E | F |
| 1 | 2 | 3 | 4 | 5 | 6 |
| A | B | C | D | E | F |
| 1 | 6 | 2 | 5 | 3 | 4 |
2.
Total number of identified biodiversity hotspots in the world is
25
24
40
34
3.
Xenograft means
A graft between two genetically identical individuals
A graft in which a tissue is grafted from one individual to another individuals of the same species
A graft between individuals of different species
Tissue grafted from one area to another of the same individual
4.
A connecting link between reptiles and birds is
Dimetrodon
Dodo
Archaeopteryx
Sphenodon
5.
Evolutionary history of an organism is known as
ontogeny
phylogeny
ancestry
paleontology
6.
Which one of the following areas in India, is a hotspot of biodiversity
Eastern Ghats
Gangetic plain
Sunderbans
Western ghats
7.
Biodiversity of a geographical region represents
endangered species found in the region
the diversity of the organisms living in the region
genetic diversity in the dominant species of the region
species endemic to the region
8.
The biogenetic law of Hackel is
Omnis vivum-e-vivum
Omnis cellula-e-cellula
Ontogeny repeats phylogeny
Phylogeny repeats ontogeny
9.
Hotspots of biodiversity means
area of the earth that contains many endemic species
species servers as a proxy for entire communities in particular area
species in particular niche/area
species diversity at particular area
10.
Which one of the following is not observed in biodiversity hotspots?
lesser inter-specific competition
species richness
endemism
accelerated species loss
11.
Alzheimer disease in humans is associated with the deficiency of
Gamma-aminobutyric acid (GABA)
Dopamine
Glutamic acid
Acetylcholine
12.
The amount of fresh water of the earth frozen as polar or glacial ice is
0.5%
0.02%
0.01%
1.97%
2.5%
13.
Which of the following is a hermaphrodite?
Ant
Aphids
Earthworms
Cockroach
14.
At the time of shedding, the number of nuclei present in an angiosperm pollen grain is
one
one or two
two or three
only two
15.
Residual persistent nucellus is known as
perisperm
pericarp
integuments
none of these
1.
(a)
| A | B | C | D | E | F |
| 3 | 5 | 1 | 6 | 4 | 2 |
2.
(d)
34
3.
(c)
A graft between individuals of different species
4.
(c)
Archaeopteryx
5.
(b)
phylogeny
6.
(d)
Western ghats
7.
(b)
the diversity of the organisms living in the region
8.
(c)
Ontogeny repeats phylogeny
9.
(a)
area of the earth that contains many endemic species
10.
(a)
lesser inter-specific competition
11.
(d)
Acetylcholine
12.
(d)
1.97%
13.
(c)
Earthworms
14.
(c)
two or three
15.
(a)
perisperm
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