[Campbell Biology P.1106] According to Figure 47.17 and its description, which statement accu... | Practice Question

According to Figure 47.17 and its description, which statement accurately describes convergent extension?

  • A: Convergent extension involves cells elongating and crawling between each other, causing a sheet of cells to become longer and narrower.
  • B: Convergence is when a sheet of cells becomes longer, and extension is when it becomes narrower.
  • C: This process primarily leads to the thickening of a cell layer rather than elongation.
  • D: Convergent extension is a process exclusive to amphibian development.

Explanation

Figure 47.17 explicitly describes convergent extension as a process where 'cells elongate coordinately in a particular direction and crawl between each other convergence as the sheet becomes longer and narrower extension '. This aligns perfectly with option A.