Answer:
They wonder about the History of life on Earth for this most improtant reason:
Explanation:
This one being, that there is a close time coincidence between major extinction events and major flood basalt outpouring events, and lesser yet important extinctions with lesser yet important flood basalt events. This suggests a causative relationship.
Blood vessels are part of the circulatory system. The highway system of the Human Body that Transports materials to all of its Cells
Your brain is telling the systems to work together and your heart lets blood pump through your body and it helps ur muscles and all the other systems move around.
About 37.2 trillion but it is very hard to determine
Instead of roots, threadlike structures called rhizoids.
have a nice day:)
3) a glacier because a river would be a V shape, mud flow would cause the valley to have flat bottom