The amino acid chains making up hemoglobin in different species:
a) differ depending on how long it has been since the species last shared a common ancestor.
b) differ depending on whether the species are marine or terrestrial.
c) are identical--otherwise the hemoglobin cannot function properly.
d) reflect differences in how the hemoglobin functions in the species.
e) can only be compared among mammalian species since non-mammalians do not possess hemoglobin.
Answer: a) differ depending on how long it has been since the species last shared a common ancestor.
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A. sexual reproduction. B. transduction and conjugation. C. meiotic recombination. D. meiotic recombination and conjugation. E. horizontal gene transfer and sexual reproduction.
Euglena use a contractile vacuole for osmotic regulation.
Answer the following statement true (T) or false (F)
Two functions of bacterial appendages are ________ and ________.
A. antibiotic resistance; motility B. attachment; energy production C. motility; energy production D. attachment; motility
Which of the following statements concerning the causative agent of syphilis is TRUE?
A) It is a large helically coiled bacterium motile by means of endoflagella. B) It is an intracellular parasite. C) It is a non-motile comma-shaped bacterium. D) It is a large bacillus with peritrichous flagella. E) It is pleomorphic and motile by means of gliding motility.