Protists and bacteria are grouped into different domains because _____
A) protists eat bacteria
B) bacteria are not made of cells
C) protists have a membrane-bounded nucleus, which bacterial cells lack
D) bacteria decompose protists
E) protists are photosynthetic
Answer: C
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How do citrus fruits such as lemons cause the basic taste of sour?
A) The more acidic the food is, the more depolarization of the sensory receptor occurs. B) Ascorbic acid binds to sensory receptors on the plasma membrane of taste cells, which leads to the triggering of cellular activity that trigger a sour taste response. C) Sugars and ascorbic acid bind sensory receptors on the plasma membrane of taste cells, which leads to the triggering of cellular activity that trigger a sour taste response. D) Citric acid amplifies the sour taste of vitamin C when it binds to specialized receptors on the taste cells.
Which of the following terms best fit with the
theory of uniformity?
a. gradual b. catastrophic c. abrupt d. extinction e. more than one of these
The random orientation of different pairs of homologous chromosomes on the metaphase plate is responsible for
A. asexual reproduction. B. crossing over. C. independent assortment. D. random fertilization.
A fetus can get an infection when a pathogen in the mother's blood is capable of crossing the placenta to the fetal circulation and tissues.
Answer the following statement true (T) or false (F)