Ared pigment that allows the erythrocytes to pick up and drop off oxygen molecules

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.

Which of these organisms have the greatest amount of cell specialized

What is the average speed of a car that traveled 300.0 miles in 5.5 hours