Answer:
<u>one thousand millionth of a metre</u>
Answer:
They are called covalent bonds.
Explanation:
I just went through the lesson.
Quick answer: Food enters the human digestive system through the mouth before then moving through the pharynx, esophagus, stomach, intestines, rectum and anus.
The answer would be d because the genes come the two parents
B according to my school.