Answer:
All organ system(s) are important for proper functioning of the organism but I think Circulatory System is the most important one...!
Explanation:
Because the organism will die without proper blood circulation...!
D) Thorns are an adaptation that some plants have evolved in order to discourage herbivores from eating the plant.
Answer:
Research meteorologists study atmospheric phenomena such as lightning. Atmospheric scientists study the weather and climate, and examine how those conditions affect human activity and the earth in general
Explanation:
<span>It is called a substrate. </span>
The term prehistory includes all of human existence prior to the emergence of writing.
