Why does a delta often form where a river meets the ocean?

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.