Consider that the room is a closed system. ryan uses the chemical energy in his muscles to create the energy of motion. he uses this energy of motion to pull the string on the clapper of a bell to produce a sound. sound fills the room.

which describes the energy in this room?

a. while energy has taken different forms, total energy remains the same.

b. as energy changes forms, total energy decreases.

c. while energy is changing forms, total energy at first increases, then decreases.

d. as energy changes forms, total energy increases.

Which macromolecules are polymers made of nucleotides (a) fatty acids (b) nucleic acids (c) carboxylic acids (d) amino acides

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution