Question
Assertion (A): A thick cuticle reduces transpiration by acting as a barrier.
Assertion (A): A thick cuticle reduces transpiration by acting as a barrier. Reason (R): Desert plants have large, thin leaves for transpiration.…
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Question
During the ventricular systole, the atrioventricular valves (P) …………… and the semilunar valves (Q) …………… .
During the ventricular systole, the atrioventricular valves (P) …………… and the semilunar valves (Q) …………… . (a) P-close and Q-open (b) P-close…
Question
Four friends P, Q, R and S were discussing the examples of genetic disorders.
Four friends P, Q, R and S were discussing the examples of genetic disorders. The examples they quoted were as follows: P.…
Question
The number of live births per thousand people per year is called:
The number of live births per thousand people per year is called: (a) Mortality (b) Population density (c) Population growth rate (d)…
Question
The structure that lies at the junction of the choroid and the iris and is itself a part of the choroid is called:
The structure that lies at the junction of the choroid and the iris and is itself a part of the choroid is…
Question
Assertion: Seminal vesicles pour an alkaline secretion into the semen as it passes through the ureter.
Assertion (A): Seminal vesicles pour an alkaline secretion into the semen as it passes through the ureter. Reason (R): The female vagina…
Question
The hormone that induces vigorous contractions of the uterus in a pregnant mother is:
The hormone that induces vigorous contractions of the uterus in a pregnant mother is: (a) Oestrogen (b) Prolactin (c) Oxytocin (d) Progesterone
Question
A scientist wanted to conduct a genetic experiment on mice. He cut the tails of all the mice and made them reproduce.
A scientist wanted to conduct a genetic experiment on mice. He cut the tails of all the mice and made them reproduce.…
Question
Assertion: A turgid plant cell is in a balanced state.
Assertion (A): A turgid plant cell is in a balanced state. Reason (R): In a turgid cell, turgor pressure and wall pressure…
Question
The optimum temperature for photosynthesis is:
The optimum temperature for photosynthesis is: (a) 10 – 15°C (b) 60 – 65°C (c) 40 – 45°C (d) 25 – 35°C