If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATE (stop)?
A. Insertion
B. Silent
C. Deletion
D. Missense
E. Nonsense
Answer: E
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The endocrine gland that produces hormones that help regulate blood calcium is the
A. pancreas. B. parathyroid gland. C. adrenal gland. D. pineal gland. E. testis.
Thomas Malthus proposed that
a. the food supply increased faster than the population. b. the population increased faster than the food supply. c. the food supply and population increased at the same rate. d. artificial selection was the key to evolution. e. natural selection was the key to evolution
You a given a plant tissue in the lab and asked to determine if the tissue is a source or a sink. Microscopic analysis reveals an abundance of colorless parenchyma cells with plastids. Only one biochemical test reacts positively with your sample. In the presence of iodine, the plastids turn a dark purplish color. Based on this information, you determine your sample is
A. a source because your sample contains plastids. B. a source because your sample is rich in carbohydrates. C. both a source and sink because it contains both plastids and carbohydrates. D. a sink because your sample is rich in carbohydrates.
During swallowing, __________ closes off the __________ so food cannot enter the lower airway
a. the pleural membrane; trachea b. cartilage; larynx c. the pharynx; esophagus d. the Adam's apple; trachea e. the epiglottis; larynx