In What Way Are Monotremes Similar to More Ancestral Chordate

question 18

Multiple Choice

In what way are monotremes similar to more ancestral chordate lineages, as opposed to more recently evolved mammals?

• A) Monotremes lay eggs; other mammals bear live young.
• B) Monotremes perform little parental care; other mammals use lactation to feed offspring.
• C) Monotremes do not have jaws; other mammals do.
• D) Monotremes are ectothermic; other mammals are endothermic.
• E) Monotremes perform external fertilization; other mammals perform internal fertilization.

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