Final answer:
Meristem tissue is typically observed in the onion root tip during microscopy. Its primary function is cell division for plant growth.
Step-by-step explanation:
The type of tissue typically observed in the onion root tip during microscopy is meristem tissue. Meristem tissue is responsible for new growth and is found at the tips of roots and shoots. The primary function of meristem tissue is cell division, which allows for the growth and development of the plant.
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