Q. Consider the following:
- Pacific salmon fish
- Bamboo
- Birds
- Mammals
Which of the above species breed only once in their lifetime?
Answer:
Only 1 and 2
Notes: Populations evolve to maximise their reproductive fitness, also called Darwinian fitness in the habitat in which they live. Some organisms breed only once in their lifetime (Pacific salmon fish, bamboo) while others breed many times during their lifetime (most birds and mammals).