An insect bite can transmit a disease-causing _____ to a human host
a. trypanosome c. ciliate
b. apicomplexan d. both trypanosome and apicomplexan
D
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Which occurs only in anaerobic metabolism of glucose?
A. acetyl CoA formation B. glycolysis C. lactate fermentation D. oxidative phosphorylation E. citric acid cycle
following a scent; others
are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. A dog homozygous for both dominant traits is mated to a droopy-eared, silent follower. The phenotypic ratio expected in the F1 is a. 9:3:3:1. b. 100 percent of one phenotype. c. 1:1. d. 1:2:1. e. 3:1.
A researcher suspects that the food in an ecosystem has been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?
A) the amino acids within proteins produced by organisms living in the area B) the starch produced by plants in the area C) the DNA of the organisms in the area D) All of the above are true.
Imagine that you conduct a phylogenetic analysis of sticklebacks and their relatives
You find that even though stickleback males are the only ones that show red coloration as a derived trait, female preference for red color is indeed found throughout the stickleback relatives. In sticklebacks, red color intensity in males is positively correlated with health, which led researchers to invoke the good genes model for the evolution of red coloration. Do your results change this conclusion in favor of sensory bias as an explanation? a. No, we can exclude sensory bias, as red coloration is still an honest indica-tor of male health. b. Yes, according to the new results the sensory bias model is the most parsi-monious explanation and good genes can be excluded. c. Not necessarily, one model does not exclude the other. d. If females have healthier offspring when they mate with red males, sensory bias can be excluded. e. A and D.