Is it true that periods occur as normal after an egg is fertilised

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Does mitochondria still meet the definition of a eukaryote why or why not?

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?