Answer:
A prokaryote is a simple, single-celled organism that lacks a nucleus and membrane-bound organelles.
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>
Zygote implants itself in the uterus.
The majority of photosynthesis occurs in the chloroplasts.