Pretty sure it's Plants since machines and factories are just filled with carbon dioxide gas and us humans are surrounded by gas and basically need carbon dioxide. Hope my statement helps.
If an individual is a carrier of an infectious disease, he is BOTH ASYMPTOMATIC AND INFECTIVE .
An asymptomatic and infective carrier refers to a person, who is a carrier of a disease or has a disease causing infective agent in his system [that is, the person is infected with an infectious disease] but who is not showing any symptom of the disease. Carriers are not usually affected by the disease concerned but they can easily transmit it to other people.
Answer:
Pythons and boa constrictors have tiny hind leg bones buried in muscles ... Vestigial legs are a clue that snakes descended from lizards. Over 100 million years ago, some lizards happened to be born with smaller legs, which, ... The ancestor of boas and pythons retained very small vestigial legs
Explanation:
1. DNA replication
2.Mitochondria transform chemical energy into electromagnetic energy.
3. It is constructed by connecting smaller monomer subunits.
