Trace the route of most mineral ions from entering a plant to being used for the plant's metabolic reactions.
What will be an ideal response?
Ans: Most mineral ions enter plants through roots, passively dissolved in water. Some mineral ions enter root cells immediately, whereas others travel in solution between cells until they meet the endodermis sheathing the root's stele. Here, the ions are actively transported into the endodermal cells and then into the xylem for transport throughout the plant. Inside cells, most mineral ions enter vacuoles or cell cytoplasm, where they become available for metabolic reactions.
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The movement of water through a plant is
driven by
a. the drying power of the air. b. osmosis. c. active pumping using ATP. d. root pressure. e. a combination of more than one of these
The body loses fluids by four of the following means. Which is the exception?
a. urine b. evaporation from lungs c. retention of salts d. sweating e. elimination of feces
Dialysis is a treatment that can replace kidney function in some patients with kidney failure, while they await transplantation. Based on your knowledge of kidney function, how do you expect dialysis to work?
A) Dialysis extracts metabolic wastes from the blood. B) Dialysis exchanges gases between the blood and the atmosphere. C) Dialysis delivers nutrients to the blood. D) Dialysis produces heat in the blood.
Analyze the following growth of a bacterial colony
Medium Growth Complete with glucose Yes Complete with lactose (no glucose) Yes Minimal No Minimal media plus biotin, threonine, leucine, methionine, and lactose Yes Minimal media plus biotin, leucine, and glucose No Minimal media plus threonine, leucine, and lactose No Minimal media plus leucine, methionine, and glucose Yes What is the genotype of the bacterium? A) bio+, thr+, leu+, met+ B) bio+, thr+, lac? C) leu+, met+, lac+ D) leu+, met+, lac? E) bio+, leu+, lac?