Susan sat out in the sun watching a baseball game. She developed small blisters on her unprotected shoulders and neck. What type of burn is represented by the formation of the blisters?
a. first-degree burn
b. second-degree burn
c. third-degree burn
d. full-thickness burn
Answer: b. second-degree burn
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In which of the following structures of a vascular plant would you expect to find totipotent cells? Select all correct choices
A. mature leaves B. shoot apical meristem C. cell elongation zone D. axillary buds
When a cell acquires a new function, it usually has acquired:
A. additional nutrients. B. additional energy. C. additional volume. D. a new enzyme.
The yolk sac is indicated by
a. A. b. B. c. C. d. D. e. E.
Answer the following questions true (T) or false (F)
1. Having defective proteins in the cell membrane can cause disease. 2. The hydrophilic heads of phospholipids in the plasma membrane face a water-based environment. 3. Cholesterol is a hormone receptor in the plasma membrane.