What is two plus seven? I am lost

What causes the phospholipids to organize themselves the way they do

Talking listening and reacting non verbally are all part of communicating

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics