Multiple choice

Presence of gill slits in the embryos of all vertebrates support the theory of

  1. organic evolution

  2. biogenesis

  3. metamorphosis

  4. recapitulation

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The presence of gill slits in vertebrate embryos is a classic example used to support the recapitulation theory (biogenetic law), which suggests that an organism's development (ontogeny) repeats its evolutionary history (phylogeny).