Biology
Medium
Question
The skeleton of sponges is made up of___________?
A
Calcium
B
Silica
C
Both of these
✓ Official correct answer
D
None of these
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
Calcium
No member explanations yet for this option.
B
Silica
No member explanations yet for this option.
C
Both of these
No member explanations yet for this option.
D
None of these
No member explanations yet for this option.