MCQ
Which is correct
- ALegumes fix nitrogen through bacteria in their leaves ‘
- ✓Legumes fix nitrogen through bacteria in their roots
- CLegumes fix nitrogen independent of bacteria
- DLegumes do not fix nitrogen
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Statement $I$: Gause's competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement $II$: According to Gause's principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below :
$(i)$ Every gene contains the information to express a particular trait.
$(ii)$ Gene responsible for $\beta$ - thalassemia is present on $21^{st}$ pair of autosomal chromosome.
$(iii)$ Mendel's approach of using mathematics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.