What abiotic factor would most likely signal a population of birds that it is time to migrate from north to south? decrease in sunlight
O change in precipitation
O increase in food source
o change in wind direction

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

What are the three types of counseling established by marine corps policy?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.