In the presence of DNA-binding protein Sp1, transcription is:
A. increased if H1 is at low levels.
B. decreased if H1 is at low levels.
C. increased if H1 is at high levels.
D. not affected by H1.
A
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You observe that chimps use sticks to collect termites for food. Which of the following would indicate this the use of the stick is a learned behavior?
A. The chimp is the only member of his or her population that exhibits this behavior. B. The chimp prefers eating termites to other types of insects. C. Food is abundant in the chimp's environment. D. Chimpanzees raised in isolation do not use sticks.
Darwin and Wallace
1.developed our system of classification. 2.described natural selection. 3.discovered DNA. 4.described the functions of genes.
Recent studies have shown that some Clostridia species have peptidoglycan between an inner and outer membrane, and were therefore properly reclassed as Gram-negative because of their unrelatedness.
Answer the following statement true (T) or false (F)
The dyes fluorescein and rhodamine
A. are used to identify pathogens of chlamydiosis, Legionnaires' disease, and others. B. are observed using fluorescence microscopy. C. can be used to label antibodies in immunofluorescence tests. D. emit visible light in response to ultraviolet radiation. E. All of the choices are correct.