Bio 1400 (Exam Questions And Answerscomplete Solutions) #3 Practice Questions With Answers

Which is the correct of bodily responses to increased temperature ? 1. Thermostat in hypothalamus activates cooling mechanisms 2. Body temperature decreases 3. Body temperature increases 4. Sweet glands secrete sweat and blood vessels in skin dilate A. 3,1,4,2 B. 1,2,3,4 C. 3,4,1,2 D. 4,3,2,1 {Ans: a) 3,1,4,2}Which of the following statements about nematode (or round) worms is incorrect ? a) Nematodes are found in most aquatic habitats b) They have no circulatory system c) They include many species that parasitize plants and animals d) They play roles in decomposition and nutrient cycling e) Trichinella spiralis has become a model research organism in biology {Ans: e) Trichinella spiralis has become a model research organism in biology}Which of the following chordate groups has all four key chordate characteristics as an adult ? a) lancelets b) tunicates c) frogs d) humans {Ans: a) lancelets}Development must occur in the order of which of the following sequences? {Ans: cleavage-morula-blastula-gastrula}Which of the following traits is shared by all vertebrates, at least in some developmental stages, except the lampreys ? a) notochord b) vertebrae c) cartilaginous skeleton d) cranium (head) e) mouth and jaws {Ans: e) mouth and jaws}In which of