Mountain pine beetles feed on the inner tissue of pine trees, eventually killing the trees.  The beetles’ habitat range does not extend as far north as the pine trees’ habitat range extends.  The beetles cannot tolerate very cold winter conditions.  The climate has become warmer due to human activity. This warming has happened in the parts of the pine trees’ habitat range where the beetles currently do not live.  Which of the following statements describes the most likely outcome of this change?AThe beetles will feed on other tree speciesBPine trees will become more resistant to the beetlesCThe beetles will decrease in their current habitat rangeDPine trees will decrease in the northern part of their habitat range

Select the correct answer.Which section from the passage best develops the author's claim that the spread of mountain pine beetles is an urgent issue that requires swift action? A. "Years of experience studying insect species and their effect on the environment trained her to look out for the tell-tale signs of mountain pine beetles." (paragraph 3) B. "She took note of the spot, turned off the main road, and immediately looked for a nearby landowner to get permission to collect samples." (paragraph 3) C. "Over just a few weeks, the larvae destroy the tree's vital systems. After several months, the tree turns red and brown as it dies." (paragraph 5) D. "This is the same species that had killed so many millions of acres in Colorado several years before, and I was overwhelmed." (paragraph 4)

Select the correct answer.What is the central idea of the passage? A. Entomologist Amy Lockner has years of experience studying and identifying the damaging impact of the mountain pine beetles on forests. B. The Colorado Forest Service and the Forest Service are trying to remove the dead, dying, and at-risk trees from the outbreak areas in Gunnison. C. The Wilder-Highlands project will continue to be a successful model of stewardship for all other forest health projects in the country. D. The lodgepole pine will be wiped out by the mountain pine beetles unless multiple organizations work together to stop the infestation quickly.

What will be the likely response to a warming climate for cold-adapted species that live on high mountain tops?Multiple choice question.They will move farther down the mountain.They will move to a higher mountain top.They will disappear.

Suppose a certain species of insect lives in the lush green canopy of the rain forest. Some of the insects are bright green in color, and some are bright yellow. Assume there is a natural predator of the insect in the area. What do you expect to happen to the populations of the green and the yellow insects over time?  A. The green insect population will increase and the yellow insect population will decrease.  B. The green insect population will decrease and the yellow insect population will increase.  C. Both insect populations will remain constant over time.  D. Both insect populations will increase over time.

What change is likely to occur in a population of beetles that suddenly faces predation from an invasive species of frogs? A. The beetles' survivorship curve will change type. B. The beetles' minimal viable population will decrease. C. The carrying capacity of beetles will increase. D. The population density of beetles will decrease.