Monotremes, which lay eggs, and marsupials and placentals, which are live-bearing, are three types of vertebrates calledMultiple choice question.amphibians.mammals.nonavian reptiles.avian reptiles.

Monotremes are mammals that ______, while marsupials and placental mammals ______.Multiple choice question.have mammary glands; lack mammary glandslack mammary glands; have mammary glandslay eggs; are live-bearingare live-bearing; lay eggs

Monotremes are mammals thatMultiple choice question.carry their developing young in a pouch.do not produce milk.are live-bearing.lay eggs.

Egg-laying mammals such as the echidna and duckbilled-platypus belong to a group of mammals called theMultiple choice question.monotremes.placentals.archosaurs.marsupials.

Animals with deuterostome development, bilateral symmetry as larvae, and five-part radial symmetry as adults are calledMultiple choice question.sponges.echinoderms.mollusks.cnidarians.

The two broad groups that animals have been divided into based on the presence or absence of a backbone areMultiple choice question.roundworms and flatworms.autotrophs and heterotrophs.vertebrates and invertebrates.deuterostomes and protostomes.