Around 4.1 billion years ago the first single celled organism appeared
Answer:
Plantation Forestry.
Explanation:
I found the definition linked to this word! :)
The first answer because it’s natural selection when the weak die off the the strong get stronger also the strong produces more which stops antibiotics form working which is why we have antibiotics consistently changing
Answer:
a hypothesis. ... A theory is a group of hypotheses that prove a law is true. A law is a statement of fact, but a theory is an explanation. A theory is a proposed law that has not yet been peer reviewed.
Explanation:
Answer:
Circulation and Digestion
The muscular system and the circulatory system work with the small intestine. The muscular system helps the small intestine break down food. The circulatory system works with the small intestine and gets nutrients to the rest of the body.
