MCQ
Niche is defined as the
- APosition of species in a community in relation to other species
- BPlace where organism lives
- ✓Place where organism lives and performs its duty
- DPlace where population perform their duties
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$(i)$ Plant cells have centrioles which are absent in almost all animal cells.
$(ii)$ Ribosomes are the site of protein synthesis.
$(iii)$ The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
$(iv)$ In animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum.
Of the above statements