Sugars are loaded into sieve tubes via simple diffusion
____________________ Indicate whether the statement is true or false.
F, active transport
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What factors cause oxygen to be released from hemoglobin? Select all correct choices
A. a change in the acidity or pH of blood B. an increase in CO2 in the bloodstream C. the formation of lactic acid by muscles D. an increase in aerobic respiration
The inhalation of cigarette smoke and similar pollutants has a gradual effect on cilia lining the respiratory tract, first causing the beating to slow and eventually stop. How does this change in cilia most directly impact the resistance mechanisms of the host?
A. Acquired immunity due to antibody response would be lost B. Innate host immunity due to mechanical barrier protection would be lost C. Both acquired and nonspecific immunity would be lost D. Neither acquired nor nonspecific immunity would be lost
As electrons move through the proteins that reside between Photosystem II and Photosystem I, they lose energy. What is that energy used for?
a. The energy is used to pump water from the stroma of the chloroplast, maintaining osmotic balance. b. The energy is used to harvest photons from sunlight on the leaves of the plants. c. The energy is used to move hydrogen ions from the stromal side of the membrane to the thylakoid lumen. d. The energy is used to break water to replenish lost electrons in an earlier step of the process.
Incidental catch refers to:
a. catch above a given quota. b. illegal fish catch. c. catch of noncommercial fish species. d. catch of endangered species. e. all the fish caught on a particular day.