Astudent mixed equal amounts of
water and oil together in a bottle and
found that the oil always floated
above the water. what can be said
about the density of oil versus water?
a. their densities are equal
b. oil has a greater density than water
c. water has a greater density than oil
d. oil and water must have equal masses and volumes

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation:

yay can i have brainliest

answer; both surfaces of the membrane are nonpermeable