Lichens are symbiotic relationships established
between
a. a club fungus and a green alga.
b. a club fungus and a cyanobacterium.
c. sac fungi and green algae.
d. sac fungi and cyanobacteria.
e. sac fungi and green algae or cyanobacteria
E
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Which of the following is an example of stabilizing selection?
A. selection for average birth weight in humans B. antibiotic resistance in bacteria C. decrease in the number of birds with intermediate-sized beaks who are unable to eat large or small seeds D. breeding dogs from wolves
Which of the following genera include bacteria with stalks?
A. Campylobacter B. Vibrio C. Rhizobium D. Caulobacter
Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n) _________
A. theory. B. data set. C. hypothesis. D. conclusion. E. experiment.
Breathing helps move blood from lower parts of the body toward the heart by which of the following mechanisms?
A) Inhalation increases the size of the thoracic cavity, which reduces pressure and draws blood toward the heart. B) Inhalation decreases pressure in the abdominal cavity, which opens veins and pushes blood toward the heart. C) Breathing does not help return blood to the heart. D) Inhalation increases the size of the thoracic cavity and increases pressure in the abdominal cavity.