Which statement regarding the scientific method is FALSE?
(a). Experimental results are reported in scientific journals.
(b). Hypotheses are finally proven as absolutely true or false.
(c). The control is not subjected to the experimental variable.
(d). Statistical tests may be used to analyze experimental results.
(e). Experimental results are often summarized in a graph or table.
(b). Hypotheses are finally proven as absolutely true or false.
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All of the following situations are passive modes of penetration for the invasion of host tissues by opportunistic pathogens EXCEPT
A. a bacterium adhering to intravenous tubing, forming a biofilm. B. a hiker being bitten by a tick. C. a child falling and scraping her knee. D. a firefighter receiving third-degree burns on the skin.
What type of root does ginger use to reproduce asexually?
a. bulb b. tuber c. stolon d. rhizome
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ions?
A. Ca2+ only B. K+ only C. Na+ only D. Both Ca2+ and K+ E. Both Na+ and K+
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.