Which one of the following is the lowest level of biological organization in which evolutionary change can occur?
A) cell
B) organism
C) community
D) population
D
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Virulent strains of Shigella typically carry an R plasmid
Indicate whether this statement is TRUE or FALSE.
Toothed whales use low frequency clicks to make out the outline of potential prey
Indicate whether the statement is true or false
Following some minor surgery on a patient, the doctor notices that the patient's blood is not clotting
properly. The best way to help this patient would be to give the patient an injection of: a. a strong vasoconstrictor. b. histamine. c. heparin. d. vitamin K. e. erythropoietin.
Which of the following groupings of organs is responsible for the maintenance of water balance in the body?
A) liver, kidneys, hypothalamus B) heart, liver, posterior pituitary C) posterior pituitary, hypothalamus, kidneys D) kidneys, hypothalamus, liver E) posterior pituitary, bone marrow, kidneys