Answer: B- An ex-high school standout, he enjoyed a stellar college career at the University of Kansas.
An hyphen is a punctuation mark, that is used to join two related words or to break a single word into parts or placed between words which have different meaning. The use of hyphen is called as hyphenation. Here, the hyphen should be present in between ex-high school, which is describing a relation of person with the high school, means that the person was previous scholar of the high school.
In facilitated diffusion molecules only move with the aid of a protein in the membrane. Normal diffusion requires molecules to move through a special doorway
The advantage of small cell size is that substances like organic molecules and ions can diffuse easily into the cells whereas wastes can diffuse easily out of the cells.
