ASAP Need CORRECT Penn foster answer

What's developed as a result of the electron transport chain?
A. Membrane potential
B. Proton gradient
C. Phospholipid bilayer
D. New cells
I can't tell if it's proton gradient or Membrane potential

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

Will mark brainliest. (20 points) many have pigments structures known as eyespots that detect direction of light. a. b. archaebacteria c. protists d. none of the above