Below are the recorded observations from a student's notebook: a test tube is filled with pond water rich with protists like euglena. a piece of dark paper is wrapped around the bottom of the test tube and the top of the test tube becomes green, rich with algae. based on these observations, which question could be answered?

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.

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

What kinds of molecules can pass through the cell membrane without any problem?