#Question id: 5004
#Unit 9. Evolution & Diversity of Life Forms
Pax-6 usually causes the production of a type of light-receptor pigments. In vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. The rh gene, like Pax-6, is ancient. In the marine ragworm, for example, the rh gene causes production of c-opsin, which helps regulate the wormʹs biological clock. Which of these most likely accounts for vertebrate vision?
#Question id: 5005
#Unit 9. Evolution & Diversity of Life Forms
Fossilized stromatolites
#Question id: 5006
#Unit 9. Evolution & Diversity of Life Forms
The oxygen revolution changed Earthʹs environment dramatically. Which of the following adaptations took advantage of the presence of free oxygen in the oceans and atmosphere?
#Question id: 5007
#Unit 9. Evolution & Diversity of Life Forms
Select the factor most likely to have caused the animals and plants of India to differ greatly from species in nearby Southeast Asia.
#Question id: 5008
#Unit 9. Evolution & Diversity of Life Forms
Adaptive radiations can be a direct consequence of four of the following five factors. Select the exception.
#Question id: 5009
#Unit 9. Evolution & Diversity of Life Forms
A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back helped to make possible the evolution of the tetrapod limb. This type of change is illustrative of