The answer is B, the heart is the center of the cardiovascular system as one of its main tasks is to distribute blood throughout the body.
Answer:
Small holes in plants that allow carbon dioxide in and oxygen and water vapor out
Explanation:
Stomata are tiny holes that open and close for the plant to breathe.
Girlllll idkkkkknim just tryna get pointtttt
We have been given the condition that carbon makes up 35%
of the mass of the substance and the rest is made up of oxygen. With this, it
can be concluded that 65% of the substance is made up of oxygen. If we let x be
the mass of oxygen in the substance, the operation that would best represent
the scenario is,
<span> x = (0.65)(5.5 g)</span>
<span> <em> </em><span><em>x =
3.575 g</em></span></span>
Answer ( 3 ) :
<span>conversion of matter to energy .
</span>
hope this helps!