Given the four options below, which of these taxonomic groups is larger, or more inclusive, than the other three?

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic