Patella is the word you are looking for
Answer:
Variation explains the difference in traits between all living organisms.
Explanation:
Without variation it would be pretty impossible to notice any "differences" in traits, especially between living organisms.
The answer is the second one: an underactive pituitary gland
A b c d e f g h i j wow sir
Exoskeleton and Segmented Bodies and Jointed Appendages and Bilateral Symmetry and <span>Open Circulatory System</span>
