The reason why nost scientists thought that the first true cells formed on Earth were anaerobic is being shown in the second option :B. because there was no oxygen on early Earth. Paying attention to this fact scientists discovered that first cells were prokaryotes and greatest part of them created oxygen as a toxic by-product of their own metabolism which make them understand how the planet was provided with oxygen and made a conclusion that first cells were anaerobic.
Answer:
True.
Birth control pills contain a combination of hormones that prevent the formation of the ovule, by prevent the formation of the luteinizing follicle. There are several types of birth control pills,but the process is generally the same
Explanation:
DNA is unzipped by helicase at the origin of replication. There are several origins of replications in eukaryotic DNA replication, while only one in prokaryotic replication.
<span>Carbohydrate is the polymer that acts as an energy storage molecule. It is the molecule that is used inside the bodies of living organisms in order to have energy to do processes in order to live.</span>