Which kingdom or supergroup is characterized by organisms that are saprotrophic by absorption?
A. Fungi
B. Animal
C. Protists
D. Plant
Answer: A
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How efficient is cellular respiration in extracting the energy stored in the bonds of glucose?
a. 20 percent b. 30 percent c. 40 percent d. 50 percent e. 80 percent
When the pituitary gland releases thyroid-stimulating hormone (TSH), the hormone circulates throughout the entire bloodstream, yet only the cells of the thyroid gland respond. This specificity is due to the presence of _____ in the cell membranes of the thyroid
1.adhesion proteins 2.receptor proteins 3.recognition proteins 4.transport proteins
Which of the following is the usual cause of heartburn?
A) backflow of chyme from the stomach into the esophagus B) retention of food at the bottom of the esophagus by a sphincter that is reluctant to open C) irritation of the lower esophagus by substances in spicy food D) compression of the lower esophagus by an overfilled stomach
A consequence of asexual reproduction in a plant is that __________.
A. pollen dispersal is critical to survival B. a partner is needed for reproduction C. its entire genetic legacy can remain intact D. gametes are produced in large numbers