Which environmental change would cause the greatest reduction in biodiversity of a large ecosystem?

Construct an explanation about the function of mitosis for multicellular organisms

When analyzing tree rings, what do scientists assume a thin ring indicates?

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 ?