Question

Which of the following reproduces once in a lifetime?

• A. Pacific salmon fish and bamboo
• B. Mammals
• C. Birds and mammals
• D. Litchi and mango

Hint:

Semelparous organisms reproduce once and then die; iteroparous reproduce multiple times.

Answer 1

The Correct Option is A

Step 1: Understanding reproductive strategies.
Organisms may reproduce once (semelparous) or multiple times (iteroparous) in their lifetime.
Step 2: Examples.
- Pacific salmon fish reproduce only once, after which they die.
- Bamboo flowers once in its lifetime after long intervals and then dies.
Step 3: Analyzing options.
(A) Pacific salmon fish and bamboo: Correct — Both are semelparous.
(B) Mammals: Incorrect — They reproduce many times (iteroparous).
(C) Birds and mammals: Incorrect — Also reproduce multiple times.
(D) Litchi and mango: Incorrect — These reproduce seasonally every year.
Step 4: Conclusion.
Thus, Pacific salmon fish and bamboo reproduce once in a lifetime.