Connective tissue is different from epithelial tissue in that connective tissue:
A) is not made up of cells.
B) has cells that are usually separated and scattered in an extracellular material.
C) has a structure called basement membrane.
D) is found only in joints.
Answer: B
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In humans with a very mild form of anemia, the hemoglobin molecule is affected by which of the following mutations?
A. Base-pair substitution B. Deletion C. Insertion D. Frameshift mutation E. Intron mutation
Which T cell is responsible for releasing cytokines?
a. Cytotoxic T cells b. Helper T cells c. Regulatory cells d. Memory Cells
Which of the following statements about DNA libraries is true?
(a) Production of a DNA library involves the direct insertion of short DNA fragments into bacteria through transformation. (b) By placing the library DNA into bacteria, the bacteria can be used to amplify the desired DNA fragments from the DNA library. (c) Individual bacteria that have taken up most of the library DNA are selected for during the construction of a DNA library. (d) The library DNA within the bacteria will only be replicated when it hybridizes to a DNA probe.
A monophyletic group is defined by:
a. clades. b. DNA sequences. c. shared derived characters. d. shared ancestral characters. e. most common recent ancestor.