Which epithelial lining is found in the trachea

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

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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.