Which of the following are problems with the biological species concept? Select all that apply A. it applies to asexually reproducing organisms
B. individuals assigned to different species may successfully interbreed
C. it applies only to sexually reproducing organisms

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere