An example of a haploid cell is the sperm cell. A haploid cell has a complete set of chromosomes. Through meiosis, a haploid cell called the gametes is produced. Haploid cells could also refer to the number of chromosomes in an egg or a sperm cell.
There are 4 bases:
Adenine,
Thymine,
Guanine,
Cytosine.
CO2 = Carbon + two Oxygen
Glucose= C6H12O6 = six Carbon + twelve Hydrogen + six Oxygen
so the answer is Carbon and Oxygen.
Aristotle classification
He classified plant and animals into two separate kingdoms
Modern Classification
In this system also, there were two separate kingdoms for plant and animals