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Ch. 34 - The Origin and Evolution of Vertebrates
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All textbooksCampbell 11th EditionCh. 34 - The Origin and Evolution of VertebratesProblem 3

Chapter 34, Problem 3

Unlike eutherians, both monotremes and marsupials a. lack nipples. b. have some embryonic development outside the uterus. c. lay eggs. d. are found in Australia and Africa.

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Hello everyone here we have a question that asks which one of the following characters is present? Only in New Theory. Ins a nipples that is incorrect. Be complete embryonic development inside the uterus. That is correct. In monitoring and marsupials part the embryonic development occurs within the body and part of it occurs externally and marsupials. This is in an external pouch in the mother and a monitoring that is with an egg. So B. Is correct. See mammary glands that is incorrect and D. Eggeling that is incorrect. That is only found in prototype arians and memory glands are common characters of all mammals. So our correct answer here is be complete embryonic development inside of the uterus is a character present only in New Theory. Ines thank you for watching. Bye.
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