CBSE-CLASS-XII SERIES Biology
What Is Adaptive Radiation
3 previous year questions.
Volume: 3 Ques
Yield: Medium
High-Yield Trend
3
2024 Chapter Questions 3 MCQs
01
PYQ 2024
medium
biology ID: cbse-cla
Assertion (A): Plasmids are autonomously replicating circular extra-chromosomal DNA.
Reason (R): Plasmids are usually present in eukaryotic cells.
Reason (R): Plasmids are usually present in eukaryotic cells.
1
Both (A) and (R) are true and (R) is the correct explanation of (A)
2
Both (A) and (R) are true and (R) is not the correct explanation of (A)
3
(A) is true, but (R) is false
4
(A) is false, but (R) is true
02
PYQ 2024
medium
biology ID: cbse-cla
Assertion (A): The stirrer facilitates the even mixing of oxygen availability in a bioreactor.
Reason (R): Stirred-tank bioreactors generally have a flat base.}
03
PYQ 2024
medium
biology ID: cbse-cla
Tropical regions harbour more species than the temperate regions. How have biologists tried to explain this in their own ways? Explain.