MCQ
Plasmids in bacterial cells are:
- AExtra-chromosomal DNA, which cannot replicate.
- BExtra-chromosomal DNA, which can self replicate.
- CExtra DNA associated with the genome.
- DExtra DNA, associated with the genome, but cannot replicate.
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$I.$ The total organic matter synthesised by the producers in the process of photosynthesis per unit time and area is known as gross primary productivity
$II.$ Net primary productivity is the weight of the organic matter stored by the producers in a unit area/volume per unit time