Large olfactory organs in sharks help to A. See further B. Hear better C. Think
ID: 78617 • Letter: L
Question
Large olfactory organs in sharks help to A. See further B. Hear better C. Think faster D. Detect prey at longer distances Which one of the these terms refers to bony plates connected to muscles and covers the gills? A. Diverticulum B. Teleosts C. Operculum D. Coelacanth What is the most dramatic event in animal evolution? A. The transformation from juvenile to adult B. The molting of the outer skeleton C. Movement from water to land D. The process of reproduction Which of these is a physical difference that must be addressed when moving from water to land? A. Oxygen is more abundant in air B. Air is 100x less dense and 50 x less viscous C. Air fluctuates in temperatures more rapidly than water. D. A variety of terrestrial habitats allow greater opportunities for adaptation. E. All of the above Amphibians depend on external sources of heat and are therefore A. Ectothermic B. Endothermic C. Dependent D. Independent What is the special membrane, which enclosed a fluid filled cavity to protect the embryo? A. Amnion B. Allantois C. Chorion D. None of the above The adjoining picture represents the lunge of __. A. Mammals B. Amphibians C. Fishes D. Birds E. Lizard In the gills fishes the __ allows for maximum absorptions of dissolved oxygen from water. A. Air sacs B. Current flow D. Ventilation E. None of the aboveExplanation / Answer
18. Hear better – Only one ear present in Sharks with three inner chamber which can detect sound, acceleration.
19. Operculum – Operculum is the hard bony which can cover the gill slits and it can protects the gills of fish.
20. Movement from water to land - During dry period, freshwater environment is unstable and the water in streams are evaporated easily. So the gills are not freely live in the environment and their filaments are collapsed.
22. Ectothermic - Ectotherms mainly depends on the external heat sources and the temperature from external source will affect the body temperature.
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