Please answer this
The first reaction bubbled because a was formed.
gas
liquid
solid
2.
The yellow color seen in the second reaction was due to the presence of a solid known as a .
substrate
precipitate
3.
Changes in color and temperature indicate that a reaction has taken place.
chemical
physical

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 is the period of cell life when it is conducting

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes