Gene duplications during vertebrate evolution have led toA. the control of body segmentation in mice by four copies of Hox genes.B. the abundance of somites in vertebrate embryos.C. the loss of other genes.D. a long development period of feathers in the chicken embryo.E. All of the above
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Gene duplications during vertebrate evolution have led to
A. the control of body segmentation in mice by four copies of Hox genes.
B. the abundance of somites in vertebrate embryos.
C. the loss of other genes.
D. a long development period of feathers in the chicken embryo.
E. All of the above
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- Scientists compare the structures of a chicken embryo and a human embryo at the same stage of development. They find that both vertebrates have similar shapes and structures, including the presence of gill slits and tails. How is this comparison of the embryos used as supporting evidence of evolution? A. The similarities suggest that chickens and humans are the direct descendants of modern day fish with tails and gill slits. B. The similarities suggest that vertebrates passthrough each of the adult stages of their evoluntionary history as they develop. C. The similarities suggest that vertebrates can undergo genetic changes during development that lead to the evolution of new species D. The similarities suggest that chickens and humans descend from ancestors with genes that code for the development of tails and gill slitsAccording to the film, "Your inner reptile," which of the following did we inherit from our reptilian ancestors? A) A yolk sac which is present in our embryonic stage B) our skin C) remnants of yolk-producing in our genome D) All of the aboveA. According to Gould and Vrba (1982), when the original cooling function of insect appendages was changed to flying, this is an example of a. inheritance. b. exaptation. c. apatation. d. adaptation. B. When primates first evolved away from their mammalian ancestors, they a. developed a larger and more complex brain. b. increased their reliance on the sense of smell. c. increased the number of canines (for meat-eating). d. all of the above
- How can evolutionary relationships among organisms be determined by comparing embryonic development? A. Embryos of fish and mammals share no similarities B. Embryos retrace their ancestral stages during embryonic development C. Embryos of more closely related organisms show greater similarities in development D. Embryos that develop inside eggs lack similarities to placental mammalsA genetic change that caused a certain Hox gene to be expressedalong the tip of a vertebrate limb bud instead of farther backhelped make possible the evolution of the tetrapod limb.This type of change is illustrative of(A) the influence of environment on development.(B) paedomorphosis.(C) a change in a developmental gene or in its regulation thataltered the spatial organization of body parts.(D) heterochronyThe bones in the front fins of whales and the bones in the human arm evolved from a common ancestor but carry out different functions. This is an example of A. homologous structures. B. vestigial structures. C. analogous structures. D. embryonic structures.
- Kettlewell's experiment is included in most biology texts as an example of evolution How do we know that the moths evolved?Which gene family was found to control the development and differentiation of limbs in vertebrate lineages? A) Hox B) Sonic hedgehog C) Noggin D) EyelessWhich of the following examples from class show that a mutation can have evolutionary benefits? Group of answer choices C) Hox mutations that lead to legs developing on fruit flies where antennae should be A and B A, B, and C B) Hox mutations leading to limbs with digits forming from lobe fins A) Stickleback fish mutation
- Which statement is true of hox genes? Group of answer choices A. they regulate development of body regions and are found in all animals B. they control the functioning of cells and are found in all life C. they control growth and development in plants D. they are only found in insects and control segmentationWhich of the following statements is FALSE? a. Only vertebrates possess HOX genes. b. HOX genes are transcription factors. c. Hox genes are very highly conserved in the genome location and function among organims. d. HOX genes are activated in a very predictable pattern.A swim bladder is a gas-filled sac that helps fish maintainbuoyancy. The evolution of the swim bladder from the airbreathing organ (a simple lung) of an ancestral fish is anexample of(A) exaptation.(B) changes in Hox gene expression.(C) paedomorphosis.(D) adaptive radiation