Natural selection cannot occur without

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

Witch type of microscope is used to view very small cell components like proteins and dna?

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy