All plant and animal groups existing together and the physical factors with which they interact compose an ecosystem<span>.</span>
Answer:
a control
Explanation:
you need something to compare it to to see if anything happens
C
Explanation:
I think it's c if not then d
The answer would likely be true because bones dissolve when
kept in acid for hours because the bone has a component, called calcium. With
the calcium, it breaks down and dissolves in acid when it is dissolved in it,
making the bone to dissolve the minerals, making the bones decalcified.
