The ________ is an accessory organ of the digestive system
A) esophagus
B) stomach
C) tongue
D) duodenum
E) anus
C
Bloom's Taxonomy: Comprehension
Section: Structures of the Digestive Tract
Learning Outcome: 23.2
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During anaerobic metabolism, pyruvate is broken down to __________
a. lactic acid b. water c. oxygen d. ATP
After melting a significant quantity of lab equipment during a previous experiment, your colleague decides to recoup his losses by synthesizing trendy vitamin-infused beverages for sale during his off time. He knows that the vitamins he’s chosen won’t dissolve in water, so he’s planning to dissolve them in oil and then blend the vitamin-oil solution into soda water. What’s the flaw in your colleague’s plan?
a. Soda water will leach vitamins from the oil, causing them to settle out of the beverages. b. Vitamins are only soluble in trans fats, which will negate the health benefits of his products. c. Oils are hydrophobic, so his beverages will separate before they can be consumed. d. Carbonation in soda water will cause the fatty acids to decompose into alcohol.
Carbon dioxide in the atmosphere
a. is destroying the ozone layer. b. has dramatically increased in the last few decades. c. is one of the prime reasons for acid depositions. d. is a waste gas produced by respiration and has no biological use. e. can change spontaneously to carbon monoxide in sunlight
Biologists cannot possibly study all living species. Instead, they try to understand cell behavior by studying a select subset of them
Which of the following characteristics are useful in an organism chosen for use as a model in laboratory studies? (a) amenability to genetic manipulation (b) ability to grow under controlled conditions (c) rapid rate of reproduction (d) all of the above