Answer:
These plants have a thick bark, adventitious roots, long life cycle and rapid growth rate.
Step-by-step explanation:
The Douglas fir is a perennial and woody plant having long life cycle. it has developed many adaptations to its environment that help this plant to survive in drastic environment. These adaptations are,
Thick Bark:
The bark of Douglas fir plants is thicker than other plant species and its composition looks like a cork which prevent the loss of water from the plant.
Adventitious roots:
These plants have developed adventitious roots that grows directly from the truck instead of the roots. This adaptation makes a stronger connection with soil and these plants are not easily ripped off.
Long life cycle and Rapid growth:
Douglas fir plants have long life cycle as well as rapid growth rate. So they are found in abundance.