Answer:
I think it's A
Explanation:
I'm guessing but i feel like it's def not D
<span>Intercalated discs have a function in connecting individual heart muscle cells (cardiomyocytes) and making them work as a single functional organ or syncytium. As a result, the contraction of cardiac tissue is synchronized. </span> <span>Intercalated discs are transverse bands that separate the adjacent ends in cardiomyocytes and appear as stained irregular lines at 90 degrees to the striped sarcomeres.</span>
water and algae also green sulfur bacteria.
i hope this helped you.
