Answer: <u><em>D. An observation that has a number associated with it</em></u>
Explanation: The answer is D. An observation that has a number associated with it. I would explain further, but it is pretty self explanatory.
<em>Good luck!</em>
A natural resources necessary for producion are safeguarded
Answer:
Both prophase and telophase have a complete set of chromosomes and organelles.
B is correct
Acids are molecular compounds that release hydrogen ions. A binary acid consists of hydrogen and one other element.