Answer:
Immune and Lymphatic Systems
Explanation:
C) White light is least useful for photosynthesis in terrestrial plants. Green would be more useful because that's their usual color.
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.
