Consider these phylogenetic trees. the first tree is based on physical characteristics. the second tree is based on structure, genetics, and evolutionary history. which can be concluded from a comparison of the two phylogenetic trees? a. phylogenetic trees are not subject to change. b. classification can change with new discoveries and evidence. c. classification does not change with more evidence. d. phylogenetic trees are inaccurate.

The classification for Opossum changes between the two trees. So the answer is B. Classification can change with new discoveries and evidence.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products