Step 1: Contextualize Human Migration.
Modern humans migrated out of Africa and encountered Neanderthals already present in Europe.
Step 2: Interpret Genetic Evidence.
The higher proportion of Neanderthal DNA in Europeans suggests that interbreeding occurred after modern humans arrived in Europe, where Neanderthals were established, supporting option (B).
An ornamental shrub species was brought from Japan in the early 1800s to India, where it was planted frequently in gardens and parks. The species persisted for many decades without spreading, and then began to spread invasively fifty years ago. Which one or more of the following processes could have led to it becoming invasive?
Which one or more of the following is/are greenhouse gas(es)?