Systemic lupus erythematosus (SLE) is an example of a disease caused by type ________ hypersensitivity
A) I
B) II
C) III
D) IV
Answer: C
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The primary component of the plasma membrane is:
A) carbohydrate. B) cholesterol. C) phospholipid. D) protein.
Which of the following is least important in deciding whether a fossil should be classified as a hominin?
A) tooth structure B) brain size C) bipedalism D) slope of the face
The oldest well-documented flowering plant fossils date to about ____ years ago
a. 1.5 billion b. 420 million c. 125 million d. 250 million e. 17 million
Which of the following is FALSE?
a. Multicellularity allows organisms to become larger than physiologically possible for a single cell b. A cell can grow infinitely large as long as there is adequate nutrition in its extracellular environment c. In a multicellular organism, all cells must be exposed to either the environment or a circulatory system d. Adaptations that increase surface area, such as invagiations or flattened cell shape, allow cells to become larger e. Development and cell specialization is a consequence of multicellularity f. All of these are true g. All of these are false