Answer:
Biogas is composed mostly of methane (CH4), the same compound in natural gas, and carbon dioxide (CO2).
Explanation:
Simple squamous epithelium
Answer:
four
Explanation:
Carbon atoms have four electrons in their outer shell. So, it exhibits tetravalency & thus, a single carbon atom can form a maximum of four (4) bonds with other atoms
D. strings because if you have a ¨concert band¨ with strings in it then it is called an orchestra.