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.


Answer: A

Biology & Microbiology

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