They both eat zooplankton I think
When more than one gene controls a trait it is called "<span>define polygenic inheritance".
I hope this helped!</span>
Answer:
The hardness rating is 4.
Explanation:
Calcite sits at a hardness rating of 3 and is very easily scratched with a knife and/copper coin. This is where most Marbles, limestones, travertines, rate.
Meanwhile, Fluorite sits at hardness 4 and can be scratched by a knife.
