Answer: B
Explanation: Common Sense
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: An exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton of, for example, a human. i think its B
Explanation: hope this helps!
Water is stored mainly in the central vacoule of a plant cell.
Crossing over occurs but on in meiosis 1