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>
Answer:
https://www.nap.edu/read/5787/chapter/6
https://www.nature.com/scitable/knowledge/library/how-does-social-behavior-evolve-13260245/
Explanation:
I hope that it will be helpful
The answer is C. I know that because of my previous knowledge and my class knowledge hope this helps :)<span />
Answer:
Natural selection is a theory originally popularized by Charles Darwin. According to this theory, animals in the natural environment change over time as beneficial traits are preserved, and traits which do not advance the species are slowly weeded out. Natural selection, a concept first theorized by Charles Darwin, is the adjustment of genes throughout generations based on factors that help it survive. Sometimes this is survival of the fittest or the organisms that are better suited to the environment in other ways.
Explanation:
Hope this helps you
During nitrogen fixation, bacteria breaks nitrogen gasses down into a usable form for plants.
