What is the true about smooth muscle cells?

Smooth cells are involuntary non-striated muscle cells.

Explanation:

They line the hollow organs like stomach,intestine,urinary bladder, uterus, arteries. They work automatically. They are of two types:

1. Visceral smooth muscle

2. Multi unit smooth muscle

c. would be the answer : )

explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs