An animal cell has a nucleus but no cell wall.
Answer:
In an ecosystem, energy enters in the form of solar energy or light energy from sun. Solar energy is transformed into various other types of energies like kinetic energy, chemical energy, potential energy, etc; but it eventually leaves the ecosystem in the form of heat energy.
The answer is true because the weight of all of the parts is 2300 when you put them together they will stay 2,300
Non point source pollution is a greater threat than point source pollution because non point source pollution disrupts the water cycle.
