Aphysical system is best characterized as a collection of:

energy that has distinct boundaries
energy that does work
matter that does work
matter that has distinct boundaries

deep-ocean lantern fish have special organs that use chemical energy to produce light. however, the light can only travel a certain distance through the water before it is no longer visible. how does this phenomenon validate the law of conservation of energy?

the fish is a closed system, so energy is allowed to exit the system.
the law of conservation of energy applies to biological, not physical, systems.
the light energy travels through the water until it is reflected or absorbed.
the light is not carried by matter and contains no energy.
retreating glaciers at kenai fjords national park in alaska leave conditions that allow scientists to study primary succession. what conditions would most likely be present in this region?

large trees growing in rich soil
organisms growing on bare rock
bare soil with little plant growth
a wide variety of organisms

over the last few decades, scientists have noticed that lobsters, which obtain heat from the environment rather than generating it themselves, are moving north at a rate of six kilometers per year. what is the best explanation based on these observations?

lobsters are adapting to cooler temperatures.
lobsters are looking for mates in northern regions.
lobsters can only reproduce in regions closer to the poles.
lobsters prefer warmer regions early in their life cycles.