The osmoregulatory process called secretion refers to the _____
A) reabsorption of nutrients from a filtrate
B) selective elimination of excess ions and toxins from body fluids
C) formation of an osmotic gradient along an excretory structure
D) expulsion of urine from the body
B
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Which of the following is made during a secondary active transport process?
a. glucose b. oxygen c. ATP d. carbon dioxide
The ancestors of modern ________ performed the oxygenic photosynthesis responsible for converting our anoxic planet to an oxygenated one.
A. Firmicutes B. Cyanobacteria C. Crenarchaeota D. Proteobacteria
A host can harbor a pathogen without developing a disease.
a. true b. false
If a storm breaks off the top of a tree, within a year or two, one of the lower branches will grow upward and become the new tree top, while inhibiting other branches from doing the same. This is an example of
A) the presence of cytokinins. B) the influence of ethylene. C) the formation of an abscission layer. D) phytochrome inhibition. E) apical dominance.