Answer:
I think humans and whales are closely related on the evolutionary tree because they are both mammals and both have endoskeleton
That would be an isotonic solution
It depends on the elephant for example an African bush elephant weighs around 13,000 pounds and a Asian elephant weighs around 8,800 pounds and a African forest elephant weighs 6,000 pounds
The principles of probability can be used to predict the outcomes of genetic crosse