Question

What is true of bacillariophyceae?

• A. Epitheca is smaller.
• B. Hypotheca is smaller.
• C. Both epitheca and hypotheca have same size.
• D. Any of the two can be larger.

Answer 1

The correct option is B Hypotheca is smaller.

• The diatoms (belong to Bacillariophyceae) have an external hard and porous layer called frustules.
• These frustules are composed of two sections (also called valves or thecae).
• The smaller thecae are called as hypotheceae.
• The correct answer is B.