Which of the following is(are) totipotent? (Select all correct choices.)
A. the fertilized egg
B. cells of the inner cell mass
C. cells of the ectoderm
D. cells of the endoderm
E. cells of the mesoderm
A
Biology & Microbiology
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Which of the following are examples of proteins encoded by oncogenes?
A. genome integrity proteins B. transcription factors C. DNA repair enzymes D. intracellular signaling proteins E. growth factor receptors
Biology & Microbiology
What term describes an innate response to a simple and specific stimulus?
a. imprinting b. instinct c. learned behavior d. habituation e. a conditioned response
Biology & Microbiology
anion or cation? potassium
What will be an ideal response?
Biology & Microbiology
The first successful land plants, even though they lacked vascular tissue, were the
A. mosses. B. coniferous trees. C. ferns. D. liverworts and hornworts.
Biology & Microbiology