I think b, because it’s the time that the isotope takes to fall to half of its original value
Answer:
Wind
Explanation:
Steel, coal and oil will all run out eventually
Answer:
Biology is the study of life and living organisms. Biology recognizes the cell as the basic unit of life, genes as the basic unit of heredity, and evolution as the engine that propels the creation and extinction of species.
Lemon tree . Because there always a tree but different types of
The answer is c, it has no nucleus, prokaryotic cells have free floating dna
