MULTIPLE CHOICE QUESTION
You can get the common cold repeatedly because (mark all
correct)
1.Sometimes colds are really strong
2.Your excretory system is malfunctioning.
3.All illnesses repeatedly make you sick
4.Your WBCs may not recognize the antigen shape.
5.The antigen shape mutates

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.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

the answer is c a tornado