Four kinds of organisms are listed: Pacific salmon, an oyster, an eagle, and bamboo…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Four kinds of organisms are listed: Pacific salmon, an oyster, an eagle, and bamboo.
- Which two breed only once in their life?
- Which one produces a large number of small offspring and breeds many times?
- Which one produces few large offspring and breeds many times?
- The topic of this problem is life history variation. Is it in the NTA list for NEET?
Need a reminder? The key ideaShow
Exponential growth: , with . Logistic growth: , with the largest rate at . Life history: some species breed once, others many times. Some have many small offspring, others few large ones.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) The Pacific salmon and the bamboo.
Step 2. (b) The oyster, which makes many small offspring.
Step 3. (c) The eagle, a bird, which makes few large offspring, as birds and mammals do.
Step 4. (d) No. NCERT teaches it, but it is not named in the NTA text for NEET, so it is kept out of the NEET format papers. A-Level and IB ask it.
Answer: (a) salmon and bamboo; (b) oyster; (c) eagle; (d) not in the NTA list.
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