Which statement helps to explain why ice is less dense than liquid water? (2)
What will be an ideal response?
1 Water molecules make hydrogen bonds at definite angles
2 Cold molecules move less than warm molecules
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Body functions such as heart rate, blood flow, and digestion are controlled by the:
A. autonomic nervous system. B. somatic nervous system. C. automatic nervous system. D. sympathetic nervous system.
Paralytic shellfish poisoning occurs when humans eat shellfish that have fed on
A. Gonyaulax spp. B. Salmonella spp. C. Vibrio cholerae. D. E. coli.
What are the inputs to the process of photosynthesis?
A) sunlight, oxygen, and sugar B) sunlight, water, and carbon dioxide C) carbon dioxide and water D) water and carbon dioxide E) water and sugar
Place the processes occurring in the digestive tract in the correct order.IPeristaltic waves of contraction propel the food along the esophagus.IIGastric juices are secreted with the arrival of food into the duodenum.IIIThe acidic chyme is transferred through the pyloric sphincter.IVHCl and pepsin begin digestion of proteins into shorter polypeptides.
A. I, IV, and III B. II, III, and IV C. I, II, and III D. I, II, and IV E. IV, III, and II