Answer:
The cornea
Explanation:
The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air.
Answer:
I believe it's an organ
Explanation:
Organs have atleast two or more tissue types and preform specific sets of functions for the body.
It seems that you have missed the necessary options for us to answer this question, but anyway, here is the answer. The climatic zone in which the day length is about the same during the entire year is Tropical. Hope this answers your question. Have a great day!