The following characteristics describe which of these? this substance is not uniform in appearance and each part of the mixture contains a combination of different ingredients in different ratios a. homogeneous mixture b. heterogeneous mixture c. pure substance d. solution

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances