Which structure of a paramecium holds a reserve copy of all a cells genes?

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?

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

In the water cycle , when does water undergo a chemical change