Questions

Assertion - Reasoning (1 Marks)

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2 questions · timed · auto-graded

Question 11 Mark
Assertion (A) : The brain allows us to think and take actions based on that thinking.
Reason (R) : The hind brain is the main thinking part of the brain which has regions which receive sensory impulses from various receptors.
Answer
(C) A is true but R is false.
Explanation :
A is true but R is false.
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Question 21 Mark
Assertion (A) : If mother is homozygous for black hair and father has red hair then their child can inherit black hair.
Reason (R) : Gene for black hair is recessive to gene for red hair in humans.
Answer
(C) A is true but R is false.
Explanation :
Gene for black hair colour is dominant to gene for red hair colour in humans. Mother has black hair and can be represented by $(\mathrm{BB})$ whereas father can be represented by (bb).
Image
So, the child will be heterozygous for black hair colour.
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Assertion - Reasoning (1 Marks) - Science STD 10 Questions - Vidyadip