Answer:
There are actually two, I think.
CAT Histidine His
CAC Histidine His
Explanation:
I asked my aunt. She is a worker in the medical field.
The four reasons are
1) There is an over population.
2) There is a genetic variation in certain offspring that is helpful to survival.
3) The species struggle for survival.
4) The ones that lives will reproduce and pass on their genetic variation.
I hope that's help:0
The most correct answer is C
Answer:
The first Europeans to arrive in North America -- at least the first for whom there is solid evidence -- were Norse, traveling west from Greenland, where Erik the Red had founded a settlement around the year 985.
Explanation:
I hope that helps
