Tina, an environmental scientist, is protesting the use of polychlorinated biphenyl (pcb). which act will tina support her protest?
a.

clean air act

b.

clean water act

c.

toxic substances control act

d.

endangered species act

e.

water quality act

Aplant has an egg with 34 chromosomes how many chromosomes does a leaf cell of that plant have

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 ?

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.