ws; ws; ws+; ws+; ws+; ws+; ws; ws
In Neurospora, the white-spore allele (ws) results in white spores rather than the wild-type black spores. Diploid ws / ws+ cells undergo meiosis followed by one round of mitosis to form ordered tetrads. Indicate if the pattern of spores seen in the tetrads are consistent with first-division or second-division segregation.
A) first-division segregation pattern
B) second-division segregation pattern
B) second-division segregation pattern
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A. role. B. position. C. ecosystem. D. niche.
Sea stars are not sensitive to desiccation and hence are found in the high intertidal
Indicate whether the statement is true or false
A cover, or ________, is used by certain gastropods when they retreat into their shell and close the opening
a. operculum b. periostracum c. univalve d. radula
After an oil spill, bacteria that can metabolize hydrocarbons are released for bioremediation. After a month, two areas affected by the spill show different levels of improvement. Which factor should be measured to determine the difference in effectiveness between the two sites?
A. Nutrient levels B. pH C. Salinity D. Oxygen levels E. Temperature F. All of these factors may play a role.