What do you know about an organisms parents if it is heterozygous for a certain trait ?
a. both parents supplied the same allele
b. the parents had different traits
c. the parents supplied different alleles
d. the parents have the same traits

b. they present different traits

Explanation:

they are diffrent because heterozygous isnt allways the same.

what's the question ?

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.