A small, isolated population is more likely to change substantially enough to become a new species than a large one.
A recession~
It is called in favorable conditions Germination and is unfavorable Dormant
a recession
A bull market
The immediate environment winnows all variations and some match that environment favorable.
When your skin is all smooth. Or the condition of it is favorable.
A recession~
A bull market.
Mango likes to grow in hot and bright summer
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It is because there is no oxygen. All the oxygen is converted to ozone.
The northern Himalayas is covered by coniferous trees the temperature and the climatic condition is favorable for these trees