It’s probably B (I’m guessing)
Answer: Margin shape
Explanation:
In addition to the leaf shape (narrow and broad) and leaf vein arrangement (parallel and non-parallel), leaf <u>margin shape</u> is used to classify plants.
99% of calcium is found inside the cells of the body.
Sperm cells are produced in the Epididymis, to get to the urethra they must travel through the Vas deferens.