The Rickettsial diseases, Rocky Mountain spotted fever, is transmitted via
What will be an ideal response?
tick bites
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What is the proper specimen for culture and identification of the agent of acute sinusitis?
a. Aspirated material that has been collected by puncture of the maxillary sinus b. Drainage material found in the upper res-piratory passages that has been collected with a swab c. Coughed up sinus drainage collected in a sterile cup d. Sinus drainage
The region of DNA where RNA synthesis begins is the ________
A) start codon B) promoter C) stop codon D) terminator
In sticklebacks, females prefer to mate with males that have higher red color intensity. Why is the figure below consistent with runaway sexual selection as an evolutionary mechanism for the evolution of this preference?
a. Environmental factors cause brothers and sisters to have corresponding degrees of preference and intensity. b. Male trait and female preference are genetically correlated. c. Male trait and female preference are caused by the same genetic locus. d. The data shown in the figure are not consistent as they are far too noisy. e. B and C.
MPF activity was discovered when cytoplasm from a Xenopus M-phase cell was injected into Xenopus oocytes, inducing the oocytes to form a mitotic spindle
In a control experiment, Xenopus interphase cytoplasm was injected into oocytes and shown not to induce the formation of a mitotic spindle. Which of the following statements is not a legitimate conclusion from the control experiment? (a) The piercing of the oocyte membrane by a needle is insufficient to cause mitotic spindle formation. (b) An increased volume of cytoplasm is insufficient to cause mitotic spindle formation. (c) Injection of extra RNA molecules is insufficient to cause mitotic spindle formation. (d) Components of an interphase nucleus are insufficient to cause mitotic spindle formation.