Skip to main content
Pearson+ LogoPearson+ Logo
Ch. 36 - Plant Nutrition
Back
Previous problem
Next problem
All textbooksFreeman 8th EditionCh. 36 - Plant NutritionProblem 2

Chapter 35, Problem 2

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

Verified Solution
Video duration:
2m
This video solution was recommended by our tutors as helpful for the problem above.
469
views
Was this helpful?

Video transcript

Welcome back everyone. The next question is the maximum surface area for the absorption of materials in the route is provided by. Well let's look through our answer choices here. Choice A. Says root Asylum. Asylum is the vascular structure that carries the water and nutrients up from the roots. It doesn't provide surface area for absorption. Asylum is in the interior. So that's not our correct choice. Choice B. Says root. And ah dermis. Well this is also not a maximum source of surface area. The endo dermis is the layer in between the outer cortex and the inner vascular system. So that's not going to be our answer here. Choice C. Says the root cortex while the root cortex is that outer layer of the route. But if we look down at choice D. Choice D. Is root hairs. And the root hairs are hair like projections from the surface of the root. And their primary purpose is providing extra surface area for absorption of nutrients and water. So and you can kind of think of them as analogous to the villi on your intestines. Same thing where those little projections from the surface provide this extra surface area to allow more absorption. So since that is their primary purpose, choice D. Will be our correct answer. And will eliminate choice see the cortex. So the maximum surface area for absorption of materials in the route provided by choice D. Root hairs
Previous problemNext problem
Related Practice
Textbook Question

Consider the following statements regarding limiting nutrients. Select True or False for each statement. T/F Nitrogen (N), phosphorus (P), and potassium (K) are common examples. T/F Their presence limits the availability of micronutrients. T/F Their availability tends to limit plant growth. T/F Certain macronutrients and micronutrients can be considered limiting nutrients.

577
views
Textbook Question

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.

316
views
Textbook Question

Why is the presence of clay particles important in soil? a. They provide macronutrients—particularly nitrogen, phosphorus, and potassium. b. They bind metal ions, which would be toxic if absorbed by plants. c.They allow water to percolate through the soil, making oxygen-rich air pockets available. d. The negative charges on clay bind to positively charged ions and prevent them from being leached out of the soil.

473
views
Textbook Question

Suppose that certain root cells have an overall charge that is more negative than normal. What impact would this likely have on the uptake of anions such as NO3−? a., Anions would be less likely to enter roots. b. Anions would be more likely to enter roots. c. This would have no impact on the ability of anions to enter roots. d. This would make anions and cations equally likely to enter roots.

273
views