Q.

Which of the following organisms breed only once in a lifetime?

a. Bamboo

b. Pacific salmon fish

c. Oysters

d. Mammals

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a

a and b

b

c and d

c

b and c

d

a and d

answer is A.

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Detailed Solution

Some organisms breed only once in their lifetime (Pacific salmon fish, bamboo) while others breed many times during their lifetime (most birds and mammals). Some produce a large number of small-sized offspring (Oysters, pelagic fishes) while others produce a small number of large-sized offspring (birds, mammals).

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Which of the following organisms breed only once in a lifetime?a. Bamboob. Pacific salmon fishc. Oystersd. Mammals