Chapter 36: Problem 14
Explain why carnivorous and parasitic plants are most common in nutrient-poor habitats.
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Chapter 36: Problem 14
Explain why carnivorous and parasitic plants are most common in nutrient-poor habitats.
These are the key concepts you need to understand to accurately answer the question.
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Where does most nutrient uptake occur in roots? a. at the root cap, where root tissue first encounters soil away from the zone of nutrient depletion b. at the Casparian strip, where ions must enter the symplast before entering xylem cells c. in the symplastic and apoplastic pathways d. in root hairs, in the zone of maturation
Why are proton pumps in root-hair plasma membranes important? a. They pump protons into cells, generating a membrane potential (voltage). b. They allow toxins to be concentrated in vacuoles, so the toxins do not poison enzymes in the cytoplasm. c. They set up an electrochemical gradient that makes it possible for roots to absorb cations and anions. d. They set up the membrane voltage required for action potentials to occur.
Why is it important for plants to exclude certain ions? Summarize the difference between active and passive exclusion mechanisms.
Why are \(\mathrm{N}, \mathrm{P}\), and \(\mathrm{K}\) considered limiting nutrients? a. They tend to be found in extremely low levels within plants. b. Their presence limits the availability of micronutrients. c. Their availability tends to limit plant growth. d. They limit the amount of cation exchange taking place in roots.
Carnivorous plants and legumes (e.g., peas, soybeans) both absorb key nutrients directly from other organisms. How is nutrient acquisition in pitcher plants similar to that in legumes? How is it different?
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