Which of the following is true about sponges (Porifera) and comb jellies (Ctenophora)? CHOOSE ALL THE TRUE RESPONSES. Sponges lack a true nervous system Sponge larvae have hairs that act like proto-neurons. Comb jellies lack a nervous system. Researchers do not agree on the basal group of animals; they are divided between Porifera and Ctenophora.
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Match the organisms with the appropriate description. $$ \text {sponges} \quad \quad \text {a. most diverse vertebrates} $$ $$ \text {cnidarians} \quad \quad \text {b. no true tissues, no organs} $$ $$ \text {flatworms} \quad \quad \text {c.jointed exoskeleton} $$ $$ \text {roundworms} \quad \quad \text {d. mantle over body mass} $$ $$ \text {annelids} \quad \quad \text {e. segmented worms} $$ $$ \text {arthropods} \quad \quad \text {f. tube feet, spiny skin} $$ $$ \text {mollusks} \quad \quad \text {g. have specialized stinging cells} $$ $$ \text {echinoderms} \quad \quad \text {h. lay amniote eggs} $$ $$ \text {amphibians} \quad \quad \text {i. feed young secreted milk} $$ $$ \text {fishes} \quad \quad \text {j. unsegmented, molting worms} $$ $$ \text {birds} \quad \quad \text {k. first terrestrial tetrapods} $$ $$ \text {mammals} \quad \quad \text {l. tailless primates} $$ $$ \text {apes} \quad \quad \text {m. bilateral with a saclike gut} $$
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