How many spiracles are present in cockroach_____________?
Correct answer: C. 20
- A. 5
- B. 10
- C. 20
- D. 40
Explanation
A cockroach has 10 pairs of spiracles, with two thoracic pairs and eight abdominal pairs. Therefore, 10 pairs x 2 spiracles per pair = 20 spiracles, so students who count pairs as individual openings may choose b.
Last updated
Related questions
The fluid mosaic model describes the plasma membrane as
The statement that all cells arise from pre-existing cells was added to the cell theory by
The large central vacuole of a mature plant cell is bounded by a membrane called the
Which structure is normally absent from the cells of higher plants?
Plasmodesmata are