Which of the protist is the most complex organism ?
A) paramecium
<u>B) amoeba
</u>
C) Euglena
D) Volvox
When the guard cell is filled with water and it becomes turgid, the outer wall balloons outward, drawing the inner wall with it and causing the stomate to enlarge.
Hydrogen sulfide is a <u>compound</u>
<h3>Explanation</h3>
A compound is a substance composed of two or more element in a fixed proportion and it can be separated into simpler substance and element only by chemical method. Hydrogen sulfide is a chemical compound with H2S formula.
A) 0 because Fe is uncharged
b) 0 because O in O2 is uncharged as well
c) +3 because each Fe atom lost 3 electrons
d) -2 because each oxygen aim gained 2 elections