How is the world population projected to change in the next few decades? a.
It is projected to level off.
b.
It is projected to decrease steadily.
c.
It is projected to increase steadily.
d.
It is projected to double within 5 years.

wait any answer choices plz

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.