Answer:
It allows water and other molecules to enter and exit the system.
Explanation:
Plants have both a cell membrane and a cell wall. These allow needed molecules, such as water, to enter the cell. Both the cell wall and the cell membrane are semi permeable, which means that they choose what can enter and leave the cell. Molecules like water and other useful things to the cell enter it, and things such as waste leave the cell through the membrane and wall.
Remember that only plant cells have cell walls. Animal cells only have a cell membrane. But both the wall and membrane have the same purpose.
Microwaves Vs Infrared Rays
Microwaves have a shorter wavelength than Infrared Rays
(That makes A false)
Infrared Rays have a lower frequency than Microwaves
(This makes B true)
Microwaves have more energy than Infrared Rays
(Therefore C is false)
No waves have the same frequency
(Which means D is false)
Hope this helps!
Answer:
Most likely erosion.
Explanation:
Erosion breaks down big pieces of rock over time, and simply listed in 3rd grade geography, the appalachian mountains were worn down by erosion too.
