A human population that is shrinking would be characterized by a(n):
a. large proportion of prereproductive individuals.
b. small proportion of prereproductive individuals.
c. large proportion of reproductive individuals.
d. equal number of individuals of all age groups.
e. small proportion of postreproductive individuals.
b
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Nitrogen fixation in the hindgut of the termite is carried out by ________.
A. spirochetes B. deinococci C. cyanobacteria D. Bacteroides
The transfer of DNA fragments from a dead cell to a live, competent recipient cell that results in a changed recipient cell is termed ________.
A. transduction B. conjugation C. transformation D. mitosis E. transmission
Answer the following statements true (T) or false (F)
1.The right ventricle sends blood to the systemic circulation. 2.While arteries are usually full of oxygenated blood, the one major exception is the pulmonary artery. 3.In an open circulatory system, the heart pumps fluid through open-ended vessels into spaces where the fluid bathes the body's cells. 4.If you compared the blood pressure of an insect to that of a mammal, you would expect the pressure to be lower in the insect. 5.The pulmonary vein transports deoxygenated blood from the lungs to the heart.
Females who are carriers for hemophilia Select one:
a. All of the answer choices are correct. b. theoretically pass the allele for hemophilia to half of their daughters. c. usually do not show any symptoms of hemophilia. d. theoretically pass the allele for hemophilia to half of their offspring. e. theoretically pass the allele for hemophilia to half of their sons.