Draw it some scientists think that life elsewhere in the universe might be based on the element silicon, rather than on carbon, as on earth. look at the electron distribution diagram for silicon in figure 2.7 and draw the lewis dot structure for silicon. what properties does silicon share with carbon that would make silicon-based life more likely than, say, neonbased life or aluminum-based life?

Which type of neuroglia is found outside of the brain?

Anurse is caring for a 42-year-old client who is scheduled for an amniocentesis during the fifteenth week of gestation because of concerns regarding down syndrome. what other fetal problem does an examination of the amniotic fluid reveal at this time?

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.