Filamentous organisms such as Sphaerotilus and Thiothrix can lower the efficiency of activated sludge processes by causing ________.
A. building sludge
B. acidified sludge
C. bulking sludge
D. anaerobic sludge
Answer: C
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An example of commensalism involves which two organisms?
a. acacia trees and ant colonies b. bacteria and legumes c. cattle egrets and cattle d. plants and pollinators e. tapeworms and pigs
In cats the allele B produces black, whereas b
produces yellow. Neither gene is dominant, and in the heterozygous state the phenotype is a combination of yellow and black spots called tortoiseshell. The alleles B and b are X-linked. If a tortoiseshell cat has three tortoiseshell kittens and two black kittens, give the genotype and phenotype of the tomcat that produced them, and give the sex of the kittens. What will be an ideal response?
In _______, neither allele is dominant over the other. In such a case, a heterozygous individual will produce both phenotypes side-by-side.
a) incomplete dominance b) codominance c) complete dominance d) simple dominance
Biomining takes advantage of prokaryotes ability to ________ metals.
A. reduce B. reduce the solubility of C. oxidize D. directly solubilize E. bioaccumulate