BIOLOGY
5th Edition
ISBN: 9781265202859
Author: BROOKER
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Chapter 24, Problem 9TY
Summary Introduction
Introduction: The Hox genes are homeotic genes that are present in all animals and play a significant role in development. These genes are expressed along the anteroposterior axis during the development of the embryo.
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A. 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
Which 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.
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
Chapter 24 Solutions
BIOLOGY
Ch. 24.1 - Can you think of another example of two different...Ch. 24.1 - Prob. 1CSCh. 24.1 - Is temporal isolation an example of a prezygotic...Ch. 24.1 - Prob. 3CCCh. 24.2 - Prob. 1CSCh. 24.2 - Prob. 1EQCh. 24.2 - Prob. 2EQCh. 24.2 - Prob. 3EQCh. 24.2 - Prob. 1CCCh. 24.2 - Prob. 2CC
Ch. 24.4 - Evo-Devo: Evolutionary Developmental Biology...Ch. 24.4 - Prob. 1CSCh. 24.4 - Prob. 2CCCh. 24 - Macroevolution refers to evolutionary changes that...Ch. 24 - Prob. 2TYCh. 24 - Prob. 3TYCh. 24 - Prob. 4TYCh. 24 - Prob. 5TYCh. 24 - Prob. 6TYCh. 24 - Prob. 7TYCh. 24 - Prob. 8TYCh. 24 - Prob. 9TYCh. 24 - Prob. 10TYCh. 24 - What is the key difference between prezygotic and...Ch. 24 - What are the key differences between gradualism...Ch. 24 - Prob. 3CQCh. 24 - Prob. 1COQCh. 24 - Discuss the type of speciation (allopatric or...
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- The Brachyury and Tbx5 in vertebrates and the Ap3 gene in flowering plants a. are examples of Hox genes. b. are examples of co-opting a gene for a new function. c. are homologues for determining the body plan of eukaryotes. d. help regulate the formation of appendages.arrow_forwardWhich of the following pairs of structures is least likely to represent homology? Group of answer choices A. The mitochondria of a plant and those of an animal. B. The wings of a bird and those of an insect. C. The hemoglobin of a baboon and that of a gorilla. D. The brain of a cat and that of a dog. E. The wings of a bat and the arms of a human.arrow_forwardA. The earliest evolutionary change in the hominins was a. increased brain size. b. habitual bipedalism. c. changes in dentition. d. all of the above (they happened at the same time). B. Which of the following statements about endurance running is correct? a. Endurance running is found among all primates, but humans are most adapted for it. b. The ability to control body temperature is likely the most important running adaptation. c. Humans can outrun almost all other mammals, including horses, at short distances. d. Endurance running probably emerged with the appearance of Homo sapiens. Clear my choicearrow_forward
- In animals, Hox genes activate proteins to determine A. animal cephalic region B. animal physiology C. animal body plan D. animal caudal region E. animal reproductionarrow_forwardWhich of the following is NOT a derived trait in primates? A. Claws B. Opposable fingers/toes C. Postorbital bar/plate D. Trichromacyarrow_forwardOf the following, which one is an example of an evolutionary explanation (as opposed to a functional explanation)?A. People evolved a fear of snakes because many snakes are dangerous.B. Humans have a (tiny) tailbone because our ancient monkey-like ancestors had a tail.C. People evolved an ability to recognize faces because that ability is essential for cooperative social behaviors.D. People evolved a tendency to form long-term male–female bonds because human infants benefit from the help of two parents during their long period of dependence.arrow_forward
- Evolution results in an increase of organisms that are A. larger. B. more complex. C. better suited to the current environment. D. better able to adapt to changing environments.arrow_forwardWhich of the following statements about the hominoids is false?a. Hominoids include gorillas, chimpanzees, and humans.b. Hominoids have larger brains than other primates.c. Hominoids lack tails.d. Hominoids typically are bipedal and walk uprightarrow_forwardThe biological variation in living primates provides models for understanding A. Morphology, behavior, adaptation in the evolutionary past, and alternative forms of classification B. Alternative forms of classification C. The uses of anatomical and genetic evidence D. Morphology, behavior, and adaptation in the evolutionary pastarrow_forward
- Hox genes are activated in specific regions of the body (e.g. back of the head) and activate other genes to build specific structures in those regions. This was largely discovered by looking at the effects of mutants of the various hox genes. What other technique would provide information on the action of hox genes? Group of answer choices A. copy hox genes and place them in bacteria B. copy hox genes and place them in plants C. completely remove all hox genes from the genome D. change the control of hox genes so that they are expressed in different body regions E. reverse the order of the hox genes on the chromosomearrow_forwardThe 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.arrow_forwardAlthough many mammals have binocular vision, the anatomical adaptation(s) that set primates apart from these mammals is (are)a. prehensile tails.b. opposable digits on hands.c. mammary glands.d. hair-covered skin.arrow_forward
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