Changes in the physical environment, whether (1) occurring or ( induced, have thus contributed to the expansion of some (3) the (4) of new distinct species as populations diverge under different conditions, and the decline–and sometimes the (5) –of some species.

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Plz ! what does it mean for an allele to be dominant?