Even though the phylogenetic lineages for hominins are not definitive, four of the following statements describe possibilities. Which is NOT a possibility?
A. Homohabilis is the likely ancestor of our species.
B. Homo sapiens is the most recent.
C. Australopithecus is probably more ancient than Homo.
D. Homo erectus preceded Homo sapiens.
E. Chimpanzees and bonobos are the closest living relatives to modern humans.
Answer: A
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Which of the following is true of hydrogen peroxide?
A. It is a sterilant for inanimate objects and is quickly inactivated on living tissue. B. It leaves a toxic residue. C. It is broken down by catalase into water and oxygen. D. It is even more effective when used in combination with peracetic acid. E. It is a sterilant for inanimate objects and is quickly inactivated on living tissue; it is broken down by catalase into water and oxygen; AND it is even more effective when used in combination with peracetic acid.
Comparison of gene expression in different human tissues using the nuclear run-on transcription assay illustrates that
A) differences in protein production are mainly due to post-transcriptional mechanisms. B) few differences in protein production are detected between tissues. C) differences in protein production are mainly due to differential gene transcription. D) differences in protein production are not due to differential gene transcription. E) few differences in RNA production are detected between different tissues; thus differential protein production is mainly due to post-transcriptional mechanisms.
Which of the following are symptoms of septic shock?
What will be an ideal response?
Although the function of the flexible outer sheath in which the axial filaments of spirochetes lay is unknown, it is nonetheless essential (i.e., the bacteria will not survive if it is removed).
Answer the following statement true (T) or false (F)