11-17-2022, 12:20 PM
Download Biology official sample question paper with answer key for CBSE class 12 Board exam 2023.
Some sample questions from CBSE XII th Biology Model Paper 2023 are:
1. Evolutionary convergence is development of a
(a)Â Â Â common set of functions in groups of different ancestry.
(b)Â Â Â dissimilar set of functions in closely related groups.
©Â Â Â common set of structures in closely related groups.
(d)Â Â Â dissimilar set of functions in unrelated groups.
2. A true breeding pea plant, homozygous dominant for inflated green podsis crossed
with another pea plant with constricted yellow pods (ffgg). With the help of punnett
square show the above cross and mention the results obtained phenotypically and
genotypically in F1 generation?
3. State the agent(s) which helps in pollinating in the following plants. Explain the
adaptations in these plants to ensure pollination:
(a)Â Â Â Corn
(b)Â Â Â Water hyacinth
©Â Â Â Vallisneria
4. (a)Â Â Â Explain the Life cycle of Plasmodium starting from its entry in the body of female
Anopheles till the completion of its life cycle in humans.
(b)Â Â Â Explain the cause of periodic recurrence of chill and high fever during malarial
attack in humans.
Detailed +2 Biology question paper can be had from the below link.
Some sample questions from CBSE XII th Biology Model Paper 2023 are:
1. Evolutionary convergence is development of a
(a)Â Â Â common set of functions in groups of different ancestry.
(b)Â Â Â dissimilar set of functions in closely related groups.
©Â Â Â common set of structures in closely related groups.
(d)Â Â Â dissimilar set of functions in unrelated groups.
2. A true breeding pea plant, homozygous dominant for inflated green podsis crossed
with another pea plant with constricted yellow pods (ffgg). With the help of punnett
square show the above cross and mention the results obtained phenotypically and
genotypically in F1 generation?
3. State the agent(s) which helps in pollinating in the following plants. Explain the
adaptations in these plants to ensure pollination:
(a)Â Â Â Corn
(b)Â Â Â Water hyacinth
©Â Â Â Vallisneria
4. (a)Â Â Â Explain the Life cycle of Plasmodium starting from its entry in the body of female
Anopheles till the completion of its life cycle in humans.
(b)Â Â Â Explain the cause of periodic recurrence of chill and high fever during malarial
attack in humans.
Detailed +2 Biology question paper can be had from the below link.