PLEASE ANSWER ASAP!! Which of the following is most likely to cause the extinction of a species?
O A. genetic variation
O B. mutation
O C. natural selection
O D. a changing environment

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Which blood cell spend most of their time in the lymphatic system?