MCQ
Primary producer of an ecosystem is
- AHerbivores
- BCarnivores
- CBoth $(a)$ and $ (b)$
- ✓Green plants
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$I$. To study the normal physiology and development
$II$. To study diseases
$III$. To obtain useful biological products
$IV$. To test the vaccine safety
$V$. To test the chemical safety
Which of the above statements are correct?