Being overweight, sluggish, intolerant of cold, confused, and depressed are symptoms of
a. hyperthyroidism.
b. Grave's disease.
c. acromegaly.
d. hypothyroidism.
e. Wilson's disease
D
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In an aqueous environment, the phospholipids of a membrane ____
a. are arranged in a single layer b. are arranged in a bilayer with the polar heads of each layer located at the membrane surface c. are arranged in a bilayer with the fatty acid tails located at the membrane surface d. are arranged in a bilayer but the phospholipids have no specific orientation e. dissociate into their lipid and protein components
Some organisms are not able to live in an environment where there is oxygen; these types of organisms are called
obligate anaerobes. Which explanation is most plausible for how they survive without oxygen?
a. They are able to survive using less energy than aerobes. b. All of their ATP is imported into the cell from an external source. c. Sulfur is used instead of oxygen because it is chemically similar. d. These organisms use photosynthesis to produce energy. e. Their mitochondria are damaged, and consequently they are short-lived.
The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s22s22p6 . What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?
A. 1s22s22p63s23p6 B. 1s22s62p23s63p2 C. 1s22s83p8 D. 1s22s23p64s25p6
What is the defining characteristic of the hornworts?
a. sporophytes b. broad leaves c. cones d. jointed stems