What is a frustule?
A) The by-product of photosynthesis in diatoms
B) The rigid cell wall of a diatom
C) A microscopic phage that attacks diatoms
D) None of these choices
Question 2
Constructive interference in waves can cause ____.
A) an occasional wave greater than any noted before or after its occurrence
B) every other wave to be larger or smaller than those preceding or following
C) waves to get smaller within 24 hours
D) waves to double in height every 24 hours