An interaction between two species in which both species benefit is known as ____
a. mutualism
b. parasitism
c. commensalism
d. competition
e. predation
ANSWER: a
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Dinoflagellates became photosynthetic via secondary endosymbiosis
Indicate whether the statement is true or false.
The vascular cylinder of a root consists of ________
a. endodermis b. root apical meristem and the root cap c. cortex and pith d. primary xylem and phloem
Sickle-cell anemia is caused by the absence of the alpha chain of hemoglobin
Indicate whether the statement is true or false
When a person is exercising, CO2 builds up in the blood. What effect would this have on external respiration?
A) There would be increased diffusion of CO2 out of the blood and into the lungs and decreased ventilation to move it out of the body. B) There would be decreased diffusion of CO2 out of the blood and into the lungs and decreased ventilation to move it out of the body. C) There would be decreased diffusion of CO2 out of the blood and into the lungs and increased ventilation to move it out of the body. D) There would be increased diffusion of CO2 out of the blood and into the lungs and increased ventilation to move it out of the body.