Precambrian which lasted 291 million years!
Hope this helps!
-Payshence
Answer:
the ultimate source of energy is our sun
Explanation:
the plant absorbs the sun rays and turns it into its own food
I don't know what the second one is, sorry
The olfactory cells are replaced after thirty to sixty days
as this is their nature. They are replace as they die naturally within the
given days of thirty to sixty and to be replaced by new ones and it will continue
the same cycle.