One degree of longitude at the equator is approximately 111 km. As we move north or south the size of a degree changes. How many kilometers would 10 of longitude measure in kilometers at 45° latitude north?
A. 444 kilometers
B. zero kilometers
C. 222 kilometers
D. 55.5 kilometers

not only is it colder, it also becomes darker, less salty, and more dense.

yes, because even though a theory has a  lot of evidence to support it, it is not always true

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

friedrich meischer discovered it in white blood cell