Following statements are regarding to the evolutionary conservation of homeotic gene organization and transcriptional expression in fruit flies and mice.

A. In fruit flies and mice genes with similar structures occupy the same relative positions on each of the four chromosomes, and paralogous gene groups display similar expression patterns.

B. Hom-C cluster on Drosophila chromosome 3 and the four Hox gene clusters in the mouse genome are similar and evolutionary conserved.

C. Those mammalian genes homologous to the Drosophila labial, proboscipedia, and deformed genes are expressed anteriorly and early, whereas those genes homologous to the Drosophila AbdB gene are expressed posteriorly and later.

D. In fruit flies and mice genes are orthologous Hox gene groups.

E. Those mammalian genes homologous to the Drosophila labial, proboscipedia, and deformed genes are expressed posteriorly and later, whereas those genes homologous to the Drosophila AbdB gene are expressed anteriorly and early.

Which of the following combination is correct?

#Question id: 5004

#Unit 11. Evolution and Behavior

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 11. Evolution and Behavior

Fossilized stromatolites

#Question id: 5006

#Unit 11. Evolution and Behavior

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 11. Evolution and Behavior

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 11. Evolution and Behavior

Adaptive radiations can be a direct consequence of four of the following five factors. Select the exception.

#Question id: 5009

#Unit 11. Evolution and Behavior

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