CONNECT ACCESS FOR BIOL 01204 <C>
12th Edition
ISBN: 9781264443123
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 21, Problem 7U
The possession of fine fur in 5-month human embryos indicates
a. that the womb is cold at that point in pregnancy.
b. humans evolved from a hairy ancestor.
c. hair is a defining feature of mammals.
d. some parts of the embryo grow faster than others.
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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 slits
The following diagram is of the blastopore stage of embryonic development. Based on the information in the diagram, which of the following statements is correct
a. Most animals exhibit this pattern of development.
b. It would have formed by spiralian cleavage.
c. It would exhibit determinate development.
d. All of the choices are correct.
Using the following list, describe the proper sequence for the events of animal development:
1. Tissues, organs, and other body structures in each segment are formed.
2. Axes of the entire animal are determined.
3. Cells become differentiated.
4. The entire animal is divided into segments.
a. 2, 3, 4, 1
b. 1, 2, 4, 3
c. 2, 4, 3, 1
d. 3, 2, 4, 1
e. 2, 4, 1, 3
Chapter 21 Solutions
CONNECT ACCESS FOR BIOL 01204 <C>
Ch. 21.1 - Prob. 1LOCh. 21.1 - Prob. 2LOCh. 21.2 - Prob. 1LOCh. 21.2 - Distinguish between demonstrating that evolution...Ch. 21.3 - Contrast the processes of artificial and natural...Ch. 21.3 - Prob. 2LOCh. 21.4 - Prob. 1LOCh. 21.4 - Prob. 2LOCh. 21.4 - Prob. 3LOCh. 21.5 - Explain the evolutionary significance of...
Ch. 21.5 - Prob. 2LOCh. 21.6 - Prob. 1LOCh. 21.6 - Prob. 2LOCh. 21.7 - Characterize the criticisms of evolutionary theory...Ch. 21.7 - Prob. 2LOCh. 21 - Suppose that a male with a beak depth of 10 mm...Ch. 21 - Prob. 1IQCh. 21 - Prob. 2IQCh. 21 - Prob. 3IQCh. 21 - Why might the evolutionary line leading to...Ch. 21 - Artificial selection is different from natural...Ch. 21 - Gaps in the fossil record a. demonstrate our...Ch. 21 - The evolution of modern horses (Equus) is best...Ch. 21 - Homologous structures a. are structures in two or...Ch. 21 - Convergent evolution a. is an example of...Ch. 21 - Prob. 6UCh. 21 - The possession of fine fur in 5-month human...Ch. 21 - In Darwins finches, a. occurrence of wet and dry...Ch. 21 - Prob. 2ACh. 21 - Convergent evolution is often seen among species...Ch. 21 - What conditions are necessary for evolution by...Ch. 21 - Explain how data shown in figure 21.2a and b...Ch. 21 - Prob. 3SCh. 21 - Refer to figure 21.5, artificial selection in the...Ch. 21 - The ancestor of horses was a small, many-toed...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is the correct order for the four developmental phases in animals? A. Segmentation of the body B. Determination C. Cell differentiation D. Formation of body axes a. A, B, C, D b. A, D, C, B c. D, A, B, C d. D, A, C, Barrow_forwardObservation of the development of embryos in sea stars shows the mesoderm forming pouches bulging from the archenteron to form the coelom. From this observation, you can predict that A. the cleavage of the embryo is radial. B. the adult animal will have bilateral symmetry. C. the mouth forms from the first opening in the gastrula. D. the animal is diploblastic.arrow_forwardwhich of the following a correct development sequence a. Neural plate, proliferation, neural groove, neural tube b. Neural plate, neural groove , neural tube, proliferation c. Neural groove, neural tube, proliferation, neural plate d. Proliferation, neural plate, neural groove , neural tubearrow_forward
- Which of the following is not true about avian eggs? Choose all possible answers. a. exhibit holoblastic cleavage b. first cleavages are perpendicular to the plane of the blastodisc, and approximately at right angles to one another c. at the time of the fourth cleavage, a furrow running parallel to the circumference of the blastodisc separates central from peripheral forming blastomeres. d. portion of the undersurface of the blastoderm that is farthest from the source of gravity becomes the anterior end of the embryo. e. All of the following are true about eggs of frogs.arrow_forwardAt which of the following stages of development is a frog embryo composed of the most cells? Group of answer choices A. blastula B. neural tube stage C. gastrula D. zygote (fertilized egg)arrow_forwardCharacteristics that evolved in birds to allow for flight includea. reptilian-like scales on the legs.b. a hard-shelled amniotic egg.c. internal fertilization.d. thin, hollow bones in the skeleton.arrow_forward
- If cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface of a second gastrula where skin would normally develop, the transplanted cells will still develop into tissues of the nervous system. This experiment shows that the transplanted cells areA. differentiated.B. totipotent.C. discontinuous.D. determined.E. endodermal.arrow_forwardWhat are the correct pairings of developing and embryonic structures in the gastrulation of chickens? Multiple answers is possible. If no correct option is given write the proper pairings. a. Epiblast – ectoderm b. Secondary hypoblast – endoderm c. Primary hypoblast – endoderm d. Migrating cells - mesodermarrow_forwardThe chick represents a well-studied vertebrate model of development. Thinking about how the body plan of chick is established, define each term AND indicate its role in patterning the chick embryo. A. Henson’s node B. Ingression C. Posterior marginal zone D. Retinoic Acidarrow_forward
- The parts of the limbs develop a. in a proximal-to-distal sequence. b. in a distal-to-proximal sequence. C. at approximately the same time. d. before the primitive streak is formed.arrow_forwardWhich of the following gives rise to the skin cells? a. ectoderm b. endoderm c. mesoderm d. none of the abovearrow_forwardWhich 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.arrow_forward
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