40. The validity of scientific theories and laws depends on evidence. Which of the following
statements of evidence supports a law rather than a theory?
A. Electrons orbit the nucleus of an atom within a certain radius.
B. DNA analysis reveals that a modern species is related to an extinct species.
C. Seafloor spreading occurs at a rate of three centimeters per year in the mid-Atlantic.
D. The amount of matter in a closed system is the same at the start of a reaction as at the end of
the reaction.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

it will increase due to the time span

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher