![Medical Quiz](https://medicalquiz.net/files/logo.png)
Select your answer:
![](https://medicalquiz.net/files/wait.gif)
Topics:
Mitosis Hematology in Veterinary Medicine Health Issues and Concerns Lungs Immunology IBD Carbohydrates and Proteins Head and Neck Anatomy Physical Fitness Components SCI CH2-1 Hair Evidence Eye Physiology Plasmid Carbohydrate Metabolism Heart and Blood Vessels EpidemiologyOther quiz:
Genetics and Probability › ViewWhich of the following is a phenotype?
A. Aa
B. red hair
C. heterozygous
D. DNA
Cells › View
If you were some bad guy trying to sneak into an animal cell, who would be there to stop you?
A. nucleus
B. mitochondria
C. cell membrane
D. cell wall