____ have four pairs of walking legs attached to their cephalothorax and no antennae
a. Ticks and mites
b. Insects
c. Crustaceans
d. Myriapods
e. Arachnids
e
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A culture of an organism believed to cause intestinal symptoms is viewed under the microscope, and the microbiologist observes a cell membrane, flagella, mitochondria, and some dark unrecognizable structures within each cell. The microbiologist notes that the cells are eukaryotic because
A. only eukaryotic cells have flagella. B. the dark structures must be the cell nuclei. C. only eukaryotic cells have a cell membrane. D. only eukaryotic cells have mitochondria.
If adenine bonds with guanine, and thymine bonds with cytosine, the DNA molecule would
a. be constricted along its entire length. b. bulge where cytosine bonds with thymine. c. constrict where adenine bonds with guanine. d. partially constrict and partially bulge along its length. e. be highly reactive.
What does excess tissue fluid become once it is picked up by lymphatic vessels?
A) chime B) blood C) plasma D) lymph
Which one of the following quantities best represents the respiratory heat lost by plants in an ecosystem?
A. Gross primary productivity - standing crop biomass B. Net primary productivity C. Gross primary productivity D. Gross primary productivity - secondary productivity E. Gross primary productivity - net primary productivity