Different types of blood contact different kinds of antigens and antibodies. For example, Type A blood has A antigens and B antibodies, antibodies being the thing that fights B antigens. Type B blood has B antigens and A antibodies. So if someone with type B gets transfused with Type A blood, the person's antibodies will attack the new blood.
The answer is the first one: “...attract each other.”
Answer:
the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
It's A. Temperature changes modify the enzyme shape, so they no longer fits.
Answer:
Community
Explanation:
It has two or more species within the same geographical area (Backyard) within the same time period.
