MCQ
Bacterial ribosomes are present
- ✓In cytoplasm
- BOn endoplasmic reticulum
- COn nuclear membrane
- DOn cell wall
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$R$ : It could replace the use of monkeys to test the safety of batches of the vaccine.
$(i)$ This group includes diatoms and golden algae.
$(ii)$ They are microscopic and float passively in water currents (plankton).
$(iii)$ Most of them are photosynthetic.
$(iv)$ They have deposits in their habitat; this accumulation over billion of years is referred to as 'diatomaceous earth'.