MCQ
Sigmoid growth curve is represented by
- A$d N / d t=r N$
- ✓$d N / d t=r N(1-N / K)$
- C$N t=N_{o}+B+I-D-K$
- D$d N / d t=1-N / K$

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| Column – I | Column $- II$ |
| $(1)$ Failure of cytokinesis | $(p)$ To study in beritance of particular traits |
| $(2)$ Trisomy of 21 | $(q)$ Polyploidy |
| $(3)$ Error of metabolism | $(r)$ Down's syndrome |
| $(4)$ Pedigree analysis | $(s)$ Phenylketonuria |