Answer:
A is correct external fertilisation doesn't require sexual intercourse
Answer: Because it is harder to draw breath in. And the cold
Explanation: At higher altitudes, it becomes more dangerous, and you can develop altitude-related illnesses such as HAPE and HACE. I read a book called<em> Into Thin Air</em>, and in the book the author goes into detail on the details/complications of climbing Mt.Everest and oxygen needs. Mountain climbers use canisters of oxygen called <u>Supplemental Oxygen.</u>
Adjustment knobs are used to focus light in a light microscope
For me I would have to go with C. They always have the same number and kinds of Chromosomes.
