How did the scientists figure out that trees were sending food to smaller trees in their surrounding area? A. By planting seeds in the lab.
B. By genetic testing.
C. Observing the root systems of the trees.
D. By listening to low frequency sound communication

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.

Competition occurs between species when

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c