Answer - A
Prokaryotic cells, being unicellular organisms, do not have a defined nucleus. They have a nucleoid in place of the nucleus which is formed of a single chromosome consisting of double stranded DNA.
Answer: A and D
Explanation: pretty simple
Your brain sends signals to your body to release hormones that make you tired. This is done as a routine, and trying to sleep at different times will mess it up.
Hope this helps!
The moon has a higher maximum surface temperature compared to Earth (253 degrees of moon to 136 degrees of Earth), but this also depends on night (which is colder) or day (which is hotter).
The moon has such extreme temperatures because it has no atmosphere that can "reflect" some of the heat from the sun, whereas the earth does.
