Which of the following would be most likely to lead to the development of cancer?
A. the activation of a tumor suppressor gene
B. the activation of a proto-oncogene
C. the activation of an oncogene and an
inactivating mutation in a tumor suppressor
gene
D. the activation of an oncogene and the
activation of a tumor suppressor gene
C
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The most direct ancestors of land plants were probably _____.
A. green algae B. kelp (brown alga) that formed large beds near the shorelines C. liverworts and mosses D. photosynthesizing prokaryotes (cyanobacteria)
The best contraceptive device to prevent the spread of sexually transmitted diseases is the
A. condom. B. diaphragm. C. IUD. D. contraceptive pill.
The dry tissue that no longer carries water and solutes is called ________.
A. Heartwood B. Vascular cambium C. Sapwood D. Bark E. Periderm
The end product of transcription is the production of a(n) ________
Fill in the blank(s) with correct word