Answer:
can you say that in english
Answer :A half- life is the time required for half of the radioactive substance to undergo radioactive decay. In two half lives first half of the original sample decays then in the second half life half of what is left decays.25%
Explanation:
Answer:
cells are living, atoms are not.
Explanation:
Atoms are the building blocks of everything, not just life as cells are.
Answer:
Prokaryotes (single celled organisms)
Explanation:
Prokaryotes are single celled organisms or unicellular that lack membrane bound organelles such as the nucleus. Instead their DNA us found in a coiled loop floating freely in the cytoplasm in a region called the nucleoid. Examples that include prokaryotes are Bacteria and Archaea.
They have been estimated to exist on Earth about 3.5 billon years ago where life first started.