It has a branching venation
Objective lens helps adjust brightness of a image.
The correct answer is 6.46 W. This is how much power needed to do 648 joules of work in 100 seconds. This could be calculated using the formula P= E/t where P is power, E is joules, and t is time. So in this case, P = 648/100. So the answer is 6.46 W.
The scales help with multiple things like, distraction, helps with swimming, its also like a tougher exterior from lesser predators.