Hello There! ^_^
Your question: What is a darker contour line usually every fifth line..?
Your answer: An indes contour is a contour line that is usually in every fifth line.
Hope this helps!
Answer:
they have to remain small because nutrients go around faster around the cell then bigger cells
Explanation:
hopefully i explained it well
<span>Binary fission occurs when a parent cell splits into 2 identical daughter cells of the same size. </span>
To the heart: pulmonary vein
Away from heart: pulmonary artery
C) The Cell Would Be Forced To Divide as substances continued to build up inside the cell