All bacterial cells have ________.
A. capsules
B. flagella
C. a chromosome
D. the ability to produce endospores
E. an S-layer
Answer: C
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Plant stem cells are able to do which of the following?
A. They grow into leaves. B. They are mature cells. C. They are located in the developed part of the vascular tissue. D. They are undifferentiated cells that can produce new tissues. E. They are mostly found at the tip of leaves.
. Which organisms are believed to be closely related to arthropods based on molecular analysis?
a. mollusks b. annelids c. brachiopods d. nematodes
Which one of the following statements best summarizes the use of transgenic crops over the last 10
years? A. It has increased significantly in both industrialized and developing nations. B. It has increased significantly, but only in industrialized nations that have the expertise. C. It has increased significantly, but only in developing nations where regulations are loose or non-existent. D. It has barely increased at all because of technical difficulties and safety concerns. E. It has fallen due to technical difficulties and safety concerns.
Which of the following statements regarding the end of the first trimester is TRUE?
A. All major organ systems are in place by the end of the first trimester. B. The face appears embryonic. C. The fetus cannot yet be sexed. D. Secondary ossification centers are present. E. Significant subcutaneous fat is present.