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Ch. 32 - Deuterostome Animals

Chapter 31, Problem 6

Compare amniotic eggs to placentas.

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Hello everyone here we have a question asking us which of the following statements about the similarities between an amniotic egg and a placenta is false. A. They both nourish and protect the rowing embryo. This is correct. B. They are both made of korean and neon and yolk sac. This is correct. See they are both retained within the mother's uterus. This is incorrect. The main difference between the amniotic egg and a placenta is that amniotic eggs are deposited outside of the mother's body and it's protected with a shell filled with album while the placenta is retained within the mother's uterus and relies on the exchange of nutrients waste and gasses with the mother and D. They're both adaptive strategies for land on life. This is correct. So our answer here is C. They both are retained within the mother's uterus. Thank you for watching. Bye.
Related Practice
Textbook Question

Most species of hominins are known only from Africa. Which species have been found in other parts of the world as well?


a. early Homo—H. habilis and H. ergaster

b. H. erectus, H. neanderthalensis, and H. floresiensis

c. Australopithecus afarensis

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Textbook Question

Which statement is true about endothermy in mammals and birds? a. They both inherited this trait from a common ancestor. b. Birds are more closely related to mammals than to reptiles. c. Endothermy arose independently in these two lineages. d. Birds are reptiles and all reptiles are ectothermic.

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Textbook Question

To estimate the relative abundance of the major phyla, calculate how many named species of arthropods, mollusks, and nematode worms exist per named species of chordate (the phylum containing vertebrates, including humans; see Table 30.1). Do you think these calculations are likely to be underestimates or overestimates? Why?

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Open Question

Which of the following nested monophyletic groups are correctly organized from largest (most inclusive) to smallest (least inclusive), showing your place in the tree of life?


a. Deuterostomes>Chordates>Vertebrates>Mammals

b. Animals>Mammals>Vertebrates>Primates

c. Chordates>Primates>Mammals>Hominins

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Textbook Question

Draw a phylogeny of major populations of modern humans that would reject the out-of-Africa hypothesis.

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Textbook Question

Consider the evolution of protostomes and deuterostomes (this chapter): (1) Compare adaptations in protostomes and deuterostomes for living on land. (2) Recall that changes in the expression patterns of tool-kit genes in arthropods such as insects enabled a dramatic diversification of their segmented appendages and bodies. Design an experiment to test whether this concept applies to vertebrates.

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