Which chemical elements in fertilizers pollute stormwater runoff and contribute to excessive plant growth in a water system?.

The development of_ factored in the development of complex organisms.

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction