What does detection of a fluorescent signal from one of the spots of a DNA microarray indicate?
A. The probe hybridized to the sequences present in that spot
B. The probe did not hybridize to that particular gene
C. The experiment was not conducted correctly
D. That the probe was non-specifically trapped by the material present in the spot.
A
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Coactivators are:
A. necessary only for initiation of transcription of housekeeping genes. B. factors that bind to other proteins, not to DNA directly. C. factors that complex directly with RNA Pol II to form a preinitiation complex. D. factors that bind to enhancers.
Answer the following statements true (T) or false (F)
1. Animal biomass exceeds plant biomass in most ecosystems. 2. Air pollutants can increase heritable mutations. 3. Insect densities tend to decrease in elevated CO2, all things being equal. 4. Biomagnification of chemicals such as DDT results in lower trophic levels becoming enriched in these chemicals.
Move long distances using sun and stars.
Choose the letter of the best match: A. cognition B. waggle dance C. navigation D. filial imprinting E. fixed action pattern
Phyla Ascomycota and Basidiomycota are considered ____ because they share a more recent common ancestor with
each other than either does with any other group. a. sister taxa b. homoplastic c. homologous d. paraphyletic e. monophyletic