Microfilaments play several roles in cellular functions.
Which of the following is their role in cellu-
lar activity?
I) formation of cleavage furrows;
II) contracting of muscle cells;
III) ameboid movement.
1. I and II only
2. II only
3. III only
4. I only
5. I, II and III

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

answer; heredity;