Functions of epithelial include all of the following except :
Supporting muscle cells
Producing specialized secretions
Controlling permeability
Providing physical protection

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions