The correct answer is devastation by the pine bark beetle.
The pine bark beetles are very common pests, which are found on the pine trees of the Colorado. These beetle feed on the bark of the pine trees, which result in the loss of nutrition and trees becomes dead. In the given case, the attack of the pine bark beetle can be the reason for death of the pine trees and limiting factor to the population.
Microinjection is a simple mechanical process usually involving an inverted microscope with a magnification power of around 200x (though sometimes it is performed using a dissecting stereo microscope at 40–50x or a traditional compound upright microscope at similar power to an inverted model).
Btw science and biology are almost the same thing
Plants<span> are </span>green<span> because their cells contain chloroplasts which have the pigment chlorophyll which absorbs deep-blue and red light, so that the rest of the sunlight spectrum is being reflected, causing the plant to look </span>green<span>.</span>
