In a word ... advancement
Answer: All the water on Earth, more than 99 percent of Earth's water is unusable by humans and many other living things - only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers and swamps.
Answer:
A
Explanation:
Since mutations do occur it is likely that a mutation of height will occur
Answer:
The correct answer is A. a hypothesis that has been rigorously tested and never been disproven.
Explanation:
A hypothesis is an idea or guess or a proposed explanation of any phenomena. When the hypothesis is checked and proved by many experiments and cannot be disproven by anyone then it considered as a scientific theory.
Therefore a scientific theory is a hypothesis that has been rigorously tested by the performing different experiments and never been disproven. For example theory of evolution, natural selection which tell us about the evolution of organism on earth which is proven by Darwin. So the right answer is A.
The substance is pure depending on which atoms bond.
