4. Which is a possible event that can cause mass human migration? A. Volcanic eruption
B. Lack of invention
C. Creation of modern tools
D. Increased rainfall

In a cladogram, what occurs at a node? a derived trait appears. evolution is stopped. an ancestor dies. the cladogram ends. aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?

Me.henley said, “in the rat race we call life, only the strong will survive.” he may have been referring to