What scientific model describes interactions between system components. Group of answer

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 the sperm cells get from the stigma to the ovules?

What is the difference between topsoil and clay?