BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 32, Problem 1A
The following diagram is of the blastopore sage 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.
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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.
Observation 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.
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, B
Chapter 32 Solutions
BIOLOGY
Ch. 32.1 - Prob. 1LOCh. 32.2 - Prob. 1LOCh. 32.2 - Prob. 2LOCh. 32.2 - Prob. 3LOCh. 32.3 - Prob. 1LOCh. 32.3 - Prob. 2LOCh. 32.3 - Prob. 3LOCh. 32.4 - Prob. 1LOCh. 32.4 - Prob. 2LOCh. 32.5 - Prob. 1LO
Ch. 32.5 - Prob. 2LOCh. 32.5 - Prob. 3LOCh. 32.6 - Prob. 1LOCh. 32.6 - Prob. 2LOCh. 32 - Prob. 1IQCh. 32 - Prob. 1UCh. 32 - Animals are unique in the fact that they possess...Ch. 32 - In animal sexual reproduction the gametes are...Ch. 32 - The evolution of bilateral symmetry was a...Ch. 32 - A fluid-filled cavity that develops completely...Ch. 32 - Which of the following statements is NOT true...Ch. 32 - Which of the following characteristics is used to...Ch. 32 - With regard to classification of animals, the...Ch. 32 - The coelom a. is a synapomorphy for the clade...Ch. 32 - A coelomate organism may have which of the...Ch. 32 - Which of the following cell types of a sponge...Ch. 32 - Prob. 12UCh. 32 - Prob. 13UCh. 32 - The following diagram is of the blastopore sage of...Ch. 32 - Prob. 2ACh. 32 - Prob. 3ACh. 32 - Which of the following cell layers is not...Ch. 32 - Prob. 2S
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- Which of the following animals has indirect development (larvae)? A. Salamander B. Bony fish C. Butterfly D. B and C only E. A, B, and Carrow_forwardHow 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 mammalsarrow_forwardScientists 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 slitsarrow_forward
- The 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_forwardUsing vertebrates as an example, how does comparative embryology prove evolution?arrow_forwardProtostomes and deuterostomes can be classified based ona. cleavage pattern.b. destiny of the blastopore.c. whether the fate of the embryonic cells is fixed early duringdevelopment.d. all of the above.arrow_forward
- Which of the following are mismatched? (a) endoderm; lining of the digestive tube (b) ectoderm; circulatory system (c) mesoderm; notochord (d) mesoderm; reproductive system (e) ectoderm; sense organsarrow_forwardThe idea that the development of an animal embryo follows the evolutionary history of its species is key in which theory? A. Embryology B. Recapitulation C. Phylogeny D. Evolutionarrow_forwardAt which stage of embryonic development does the embryo have a blastopore? Group of answer choices A.Blastula B. Zygote C. Morula D. Gastrulaarrow_forward
- According to this picture of embryos (early developmental stages), which two organisms are most closely related?arrow_forwardThe similarities in embryonic development shown in the diagrams suggest that these organisms-arrow_forwardOne of the earliest experimental embryology experiments was conducted by Wilhelm Roux, who used a hot needle to kill one of the cells in an amphibian embryo at the two-cell stage. In the experiment, the remaining living cell formed only half of an embryo. However, later vertebrate experiments showed that by completely separating cells in early embryos, each can make complete individuals. What could explain the discrepancy in these experiments?arrow_forward
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