CBSE-CLASS-XII SERIES Biology
Origin Of Life
4 previous year questions.
Volume: 4 Ques
Yield: Medium
High-Yield Trend
4
2024 Chapter Questions 4 MCQs
01
PYQ 2024
medium
biology ID: cbse-cla
(iii) A cloning vector does not have a selectable marker. How will it affect the process of cloning?
02
PYQ 2024
medium
biology ID: cbse-cla
Read the following passage and answer the questions that follow:
βMosquitoes are drastically affecting human health in almost all the developing tropical countries. Different species of mosquitoes cause very fatal diseases so much so that many humans lose their lives, and if they survive, they are unable to put in productive hours to sustain their life. As a result, the health index of the country goes down.β
(a) Name the form in which Plasmodium gains entry into:
(i) The human body
(ii) The female Anopheles body
βMosquitoes are drastically affecting human health in almost all the developing tropical countries. Different species of mosquitoes cause very fatal diseases so much so that many humans lose their lives, and if they survive, they are unable to put in productive hours to sustain their life. As a result, the health index of the country goes down.β
(a) Name the form in which Plasmodium gains entry into:
(i) The human body
(ii) The female Anopheles body
03
PYQ 2024
medium
biology ID: cbse-cla
(c) State any 3 reasons for which these types of animals are being produced.
04
PYQ 2024
medium
biology ID: cbse-cla
How does latitude influence the species richness of an ecosystem?