What types of tissue comprise the skin?
What will be an ideal response?
Epithelium and connective tissue.
The epidermis is epithelial tissue and the dermis is dense connective tissue.
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When an F' plasmid acts as the donor in a mating, which of the following do(es) not happen?
A. The plasmid is transferred, including the chromosomal genes now on the plasmid. B. Some chromosomal genes not on the plasmid are transferred. C. The recipient becomes F'. D. All of the choices are correct.
Resistance of sickle cell disease carriers to malaria illustrates
A) genetic drift. B) a population bottleneck. C) balanced polymorphism. D) a founder effect.
Which statement about the geologic time scale is false?
a. Mammals originated early in the Mesozoic era. b. Radiations of marine invertebrates took place in the Mesozoic era. c. Mass extinction of the dinosaurs occurred about 65 million years ago. d. Reptiles originated during the Paleozoic era. e. Eukaryotes originated during the Proterozoic eon.
The genus Mycobacterium ________.
A. are strict anaerobes and catalase positive B. are strict anaerobes and catalase positive and have cell walls similar to Gram-negative bacteria C. stain acid-fast D. have cell walls similar to Gram-negative bacteria