If in a pond there are $20$ lotus plants of last year and through reproduction $8$ new plants are added. Then the birth rate is
- A$0.8$ offspring per lotus per year
- B$0.2$ offspring per lotus per year
- C$0.4$ offspring per lotus per year
- D$0.6$ offspring per lotus per year
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In the hierarchy of biological organization,a population is formed by the aggregation of..........
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$A$) Oysters produce a large number of small-sized offspring.
$B$) Mammals produce a small number of large-sized offspring.
In the light of the above statements,choose the correct option.
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$B$) Mammals produce a small number of large-sized offspring.
In the light of the above statements,choose the correct option.
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