All living species in the Osteichthyes clade have endoskeletons composed entirely of cartilage
a. True
b. False
ANSWER: False
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The forward thrust of swimming stingrays is created by:
a. the pectoral fins. b. the pelvic fins. c. the dorsal fin. d. the caudal fin. e. the anal fin.
An industrial ecologist's goals would NOT include:
a. increasing resource use efficiency by altering manufacturing processes. b. designing products that are durable and can be de-manufactured. c. identifying points in the product lifecycle at which waste products can be used in other processes. d. identifying points in the product lifecycle at which waste products can be landfilled.
Signaling molecules in animals are
a. neurotransmitters. b. hormones. c. pheromones. d. local signaling molecules. e. all of these.
Which system(s) control digestion?
a. the nervous system b. the endocrine system c. both the nervous and endocrine systems d. the lymphatic system e. both the nervous and lymphatic systems