The structure labeled "B" is the
a. right ventricle.
b. right atrium.
c. left atrium.
d. left ventricle.
e. superior vena cava
B
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Microbially produced glycolipid surfactants are used for
A. emulsification and increasing detergency, which aids in biodegradability. B. prevention or reduction of microbial growth on surfaces, decreasing transmission of disease. C. solubilization of hydrophobic compounds, which enhances cleanup and recovery of oil from spills. D. both emulsification and increasing detergency and solubilization of hydrophobic compounds. E. both emulsification and increasing detergency and prevention or reduction of microbial growth on surfaces.
The 16-kb mitochondrial genome encodes 13 proteins. How can there be more than 13 mitochondrially inherited conditions?
A) Some conditions are due to nuclear genes. B) Many of the conditions are due to translation errors. C) There are different kinds and numbers of mutations per gene. D) Each parent may contribute different mutations. E) Exon shuffling allows different polypeptides to form.
Which of the following is most likely to be correct?
A) Each successional stage always makes conditions more favorable for the next successional stage. B) Each successional stage always makes conditions less favorable for the next successional stage. C) Each successional stage modifies the environmental conditions of the site.
Which of the following genes would most likely play a role in promoting kin selection?
A. the genes important for the development of large antlers in the caribou B. Major Histocompatibility Complex (MHC) genes -- allow mammals to recognize related individuals C. SRY -- the gene that initiates male sex determination D. wingless -- critical for the formation of wings in fruit flies