________ are characterized body tissues, radial symmetry, and tentacles with stinging cells.
A) Annelids
B) Sponges
C) Cnidarians
D) Roundworms
C) Cnidarians
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How would an abnormally large oval window in a mouse affect that animal's hearing?
A) The mouse could detect noise at much lower volumes. B) The mouse could detect noise in a much broader range of frequencies. C) Hearing ability would be reduced in comparison with normal mice. D) Hearing is not affected by the size of the oval window.
You are a doctor examining a patient's blood test reports. You are looking at the ratio of helper T cells and cytotoxic T cells. Helper T cells ___________; cytotoxic T cells __________. You can tell them apart by the type of protein they ____________
A. activate other immune system cells; kill altered host cells; secrete B. activate other immune system cells; kill altered host cells; express on their plasma membrane C. kill altered host cells; activate other immune system cells; secrete D. kill altered host cells; activate other immune system cells; express on their plasma membrane E. activate antigens; destroy antigens; digest
Which of the following does not stimulate the
production of males in water fleas? a. spring. b. warm water. c. salty water. d. high competition for resources. e. crowding.
Enzyme used in the synthesis of mRNA
A) DNA ligase B) DNA polymerase C) RNA polymerase D) Restriction enzyme E) Reverse transcriptase