Mountains can affect the climate of close lands. In some places , mountains also block rain, so that one side of a mountain range may be rainy. That means on the other side of the mountain, it could be a dry desert. Much of soaring moisture falls as rain on the windward side of the mountains.
Unduplicated chromosomes are single chromosomes with a single line strand and one DNA molecule (if that's what you are looking for).
Palm trees mostly live in the Desert..
Hope i helped. If you need anything else ask me..