Select the organisms which breed once in their lifetime.
(A) Squirrel
(B) House sparrow
(C) Pacific salmon
(D) Bamboo
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (C) and (D) only
(A) Squirrel — Incorrect. A squirrel is a mammal; like most mammals it breeds many times in its life.
(B) House sparrow — Incorrect. Most birds breed many times.
(C) Pacific salmon — Correct. It breeds only once in its lifetime.
(D) Bamboo — Correct. Bamboo flowers only once in its life.
NCERT Extract:
Life History Variation – “… Populations evolve to maximise their reproductive fitness, also called Darwinian fitness (high r value), in the habitat in which they live. Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategy. Some organisms breed only once in their lifetime (Pacific salmon fish, bamboo) while others breed many times during their lifetime (most birds and mammals).”