A scientist observes 10% concentration of starch on the outside of a cell and 0% on the inside of the cell. 1 day later, he observes that the concentration of starch is still 10% on the outside and 0% on the inside. What is the best explanation for these observations?

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

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?

How do you date a sample of rock that you suspect as being one of the earliest on earth