The biological species concept declares an organism to be a separate species if it has undergone
evolution long enough for the emergence of statistically unique traits.
_____________ Indicate whether the statement is true or false.
F, evolutionary
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Place the following in the correct order of the
structures blood flows through beginning with the arrival of blood at the vena cavae and ending with the blood flowing to the lungs. 1. right atrioventricular valve 2. pulmonary artery 3. right ventricle 4. right atrium 5. pulmonary valve
a. 4-3-5-2-1 b. 4-1-3-5-2 c. 4-2-3-1-2 d. 3-1-4-5-2 e. 3-2-4-5-1
James Watson and Francis Crick ____
a. were both English researchers working at Cambridge University b. performed elegant experiments in DNA chemistry c. constructed an accurate model of DNA’s double helix structure d. performed experiments that convinced scientists that DNA is a double-stranded molecule e. used x-ray diffraction in all of their experiments
Which of the following best describes the physiological significance of the different oxygen-binding capabilities of hemoglobin and myoglobin?
(A) They prevent muscles from depleting oxygen levels in the blood. (B) They cause muscles to become anaerobic. (C) They prevent glycogen depletion in muscles. (D) They enhance movement of oxygen from the blood into the muscles.
The explanation of how eukaryotic cells came about is
A. the theory of spontaneous generation. B. the endosymbiotic theory. C. Oparin and Haldane's hypothesis. D. the theory of biogenesis.