Answer:
i believe it is a
Explanation:
earth's orbit should not have an effect.
Answer:
A should be your answer. I know this was yesterday, but if this was it, let me know
Explanation:
A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
Nervous system and neuropipet compounds
Particle size of soil and aeration capacity play important roles in plant growth
