Monocots demonstrate which of the following characteristics? Select all correct choices
A. vascular bundles located around the outer
circumference of the stem
B. a vascular cambium that produces
secondary xylem
C. new roots that consistently form at the
bases of stems
D. nodes giving rise to single leaves
C,D
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Which of the following is NOT an antibody class in humans?
a. IgA b. IgD c. IgE d. IgF e. IgG
The process illustrated in the accompanying figure is:
a. DNA synthesis. b. translation. c. transcription. d. a frame shift mutation. e. protein synthesis.
Many chromosome abnormalities (trisomies and monosomies) are not observed in the human population because
a. they are lethal and cause spontaneous abortion of the embryo early in development. b. all trisomies and monosomies are lethal early in childhood. c. meiosis distributes chromosomes to daughter cells with great precision. d. they are so difficult to count. e. the human meiotic spindle is self-correcting.
Treponema pallidum is the organism that causes syphilis, a sexually transmitted disease. This organism moves around freely, making it well adapted to traveling within bodily fluids and being spread from host to host during intimate contact
It possesses a single chromosome and has relatively few genes. The overall shape of this single-celled organism is similar to a corkscrew, with many twists and turns along its length. Based on this information, Treponema is most likely what type of cell? A) A prokaryotic spirillum B) A prokaryotic bacillus C) A prokaryotic coccus D) A flagellated eukaryote E) A ciliated eukaryote