Most of the mass of an atom is concentrated in the

Which are observations about the tree on the right ,? check all that apply

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins