Modern classification, otherwise known as taxonomy, was invented so as to have a single system used throughout the entire world in understanding different types of beings in existence. This way you avoid having different names for same things.
Answer:
a sequence of DNA responsible for coding a protein = gene
The complex range of alleles an organism carries for... = genotype
an allele that determines... = dominant gene
the observable characteristics= phenotype
If both parents have type o, the child will also have type o, if parents are both type O the children will only inherit type O since type A and B are dominant over type O
<em>They are exothermic as they take temperature from the surrounding and then maintain their internal body temperature according to the amount of heat absorbed :)</em>