dalton propuso que el atomo posee electrones localizados en orbitas que rodean el nucleo. Cada orbita presenta una cantidad de energia especifica

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

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.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%