Secondary sucession is the sucession that happens after an environment grew and after something happened to it. Primary sucession is an environment that started out new.
when environment conditions are stable
They form sedimentary rock.
Bacteria
the formation of a new species over a few generations
They thought the evolution of new species is linked to environmental changes
A scientist uses artificial selection to produce a new type of a cow, compared to their parents. The new cows are referred to as hybrids.
Isolated populations evolve differences gradually as they adapt to the environment