Apopulation of lizards were living in an area that began to experience a great amount of mountain building. as the mountains formed some lizards were on one side of the mountains and the rest were on the other side of the mountains. over a period of many years the lizards were no longer able to breed, or had become different species. why did this happen? a) the lizards on one side of the mountain were exposed to different conditions and therefore different characteristics were selected. b) the lizards on one side of the mountain were exposed to different conditions and therefore the same characteristics were selected. c) the lizards on one side of the mountain were exposed to identical conditions and therefore different characteristics were selected. d) the lizards on one side of the mountain were exposed to identical conditions and therefore the same characteristics were selected.

Option A, The lizards on one side of the mountain were exposed to different conditions and therefore different characteristics were selected.

Explanation:

The lizards population got divided into two parts due to development of mountain in a given sphere. There are high chances that the resources in this sphere were unevenly distributed due to which none of the population of lizard was able to use all the resources (in the manner they used earlier)  after development of physical barrier. Due to this, the lizards now are forced to live either with limited resources/or they are exposed to some new resources (which they did not explored earlier in the same sphere when it was united) leading to evolution of new species of lizard.

Hence option A, is correct.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.