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Introduction:
Hydrogen is a chemical element that is the lightest in the entire periodic table. Oxygen is also an essential element that is vital for the sustenance of life on the earth.
Answer to Problem 1SA
Correct answer:
The main source(s) of hydrogen and oxygen for plants are water and air. Hence, the correct answer is option d.
Explanation of Solution
Reason for correct answer:
Option d. is given as “water and air.”
The nutrients that are required by the plants are mostly found in water and air. The water is a source for hydrogen and oxygen in plants, whereas, air is a source for oxygen. Closure of stomata would hamper the process of photosynthesis which will make plants devoid of food and nutrients. Both water and air are essential sources of hydrogen and oxygen that are required in plants.
Reason for incorrect answer:
Option a. is given as, “soil and air.”
Air is the main source of oxygen for plants, but the soil is neither the main source of oxygen nor hydrogen. Hence, option a. is incorrect.
Option b. is given as, “water and soil.”
The main source of both hydrogen and oxygen for plants is water, but the soil is not a source for both of them. Hence, option b. is incorrect.
Option c. is given as, “water and fertilizer.”
Water is an essential source of both hydrogen and water, but fertilizer is not the main source. Hence, option c. is incorrect.
Hence, the options a., b., and c. are incorrect.
Water and air are the main sources of hydrogen and oxygen for plants. Thus, the correct option is d.
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Chapter 26 Solutions
MINDTAP BIOLOGY FOR STARR/EVERS/STARR'S
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- Chemical fertilizers: a. supplement carbon fixation by crops. b. cause eutrophication. c. provide additional nitrogen for crops. d. provide additional phosphorous for crops. e. Only b. c. and d.arrow_forwardBased on temperature requirements which of the following is not correct?* a. Coconut and mango are tropical crops b. Asian rice and wheat are cool season crops c. Citrus species are sub-tropical crops d. Cruciferous vegetables are cool season cropsarrow_forwardWhich factors affect soil quality? a. chemical composition b. history of the soil c. presence of living organisms and topography d. all of the abovearrow_forward
- (a) Younger plant parts/materials decompose faster compared to older more lignified plant parts/materials; (b) Materials with narrow C:N ratio will decompose more easily compared to materials with wider C:N ratio. A. If statement A is true B. if statement B is true C. both statement A and B are true D. statement A nor B are truearrow_forwardApple cider is used as the sugar in the process shown in the picture. What is the gas that is being collected in th balloon? A oxygen B)carbon dioxide nitrogen D) waterarrow_forwardWhy do land plants have stomates (sometimes called stomata)? a. To allow plants to take in carbon dioxide from the atmosphere. b. All of the choices are true; none are false. c. To control water loss while allowing for the uptake of some raw materials of photosynthesis. d. They allow the plant to have some control over transpiration rates.arrow_forward
- In a growing condition with limited air supply, which of the following processes will be directly affected? a. Photosynthesis b. Translocation c. Respiration d. A and Carrow_forwardPlants use ________ as an energy source to drive photostnthesis. a. sunlight b. hydrogen ions c. O2 d. CO2arrow_forwardWhich essential chemical must be “fixed” by soil-dwelling bacteria before it can enter the food chain? a. Carbon b. Nitrogen c. Phosphorous d. Both a. and b.arrow_forward
