Environmental influences appear to contribute to cellular mutations that lead to tumor growth. For example, certain diets lead to higher incidence of colon cancers, and overexposure to sunlight leads to higher incidence of skin cancers

The tissues in closest contact with a carcinogen or mutagen (anything that causes genetic mutations) are obviously the ones most likely to develop tumors. Carcinomas and melanomas account for well over half of all cancers. What type of tissue would you guess the term carcinoma and melanoma is most closely associated with?
A) connective
B) muscle
C) epithelial
D) nervous


Answer: C

Biology & Microbiology

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If we are analyzing the origin of new families, orders, etc. over time, we are studying

a. microevolution b. mutation c. macroevolution d. natural selection e. anagenesis

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To conserve water, desert plants may have leaves that are reduced are entirely absent in which case a plant stems can perform photosynthesis

a. true b. false

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During which phase of the cell cycle are the chromosomes duplicated?

A) Interphase B) Mitosis C) Meiosis D) Cytokinesis

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When a seed germinates, the embryo emerges from its dormancy and begins which phase of the plant life cycle?

A. Alternate generation B. Monocot generation C. Sporophyte generation D. Gametophyte generation E. Dicot generation

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