Africa experiences a high level of air pollution because it has more old vehicles on the road than industrialized regions do. select the best answer from the choices provided.
a. true
b. false

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes