Concept explainers
The source of the necessary elements of life is
- a. an inorganic environmental reservoir.
- b. the sun.
- c. rocks.
- d. the air.
Introduction:
The essential elements are acquired by all living beings in their basic forms as nutrients from their inorganic reservoirs in the environment. These reservoirs of elements are constantly recycled by the organisms, so they are a permanent source of elements. The compounds found in these reservoirs can contain more than one element.
Answer to Problem 1MCQ
Correct answer:
The source of essential elements of lifeis an inorganic environmental reservoir. Therefore, option (a) is correct.
Option (a) is given as “An inorganic environmental reservoir”.
Explanation of Solution
Justify reasons for the correct statement:
An organic environment reservoirisa permanent source of elements.
Hence, option (a) is correct.
Justify reasons for the incorrect statements:
Option (b) is given as “the sun”.
Sun is the ultimate source of energy. Hence, it is a wrong answer.
Option (c) is given as “rocks”.
Rocks are the reservoir of minerals. Hence, it is a wrong answer.
Option (d) is given as “the air”.
Air is the source of essential gases required for survival like oxygen. Hence, it is a wrong answer.
Hence, options (b),(c), and(d) are incorrect.
The inorganic environmental reservoirs are the only source of essential elements that are acquired by living beings in the form of nutrients. Sun, air,and rocks are not the sources of these elements.
Want to see more full solutions like this?
Chapter 7 Solutions
Loose Leaf Version for Microbiology: A Systems Approach
- An ecosystem is made up of plants, animals and microbes on one hand and air, water and mineral soil on the other hand. Discuss how these factors are connected to form the ecosystem.arrow_forwardWhich of the following pairs of words are most clearly opposites? a. biodegradable, recalcitrant b. activated sludge, sewage c. carbon dioxide, methane d. SIV, HIVarrow_forwardWhich organisms are considered the “recyclers” of our planet? (a) consumers (b) producers (c) phytoplankton (d) decomposersarrow_forward
- Which of the following is True about ocean ecosystems?a. Surface waters typically have abundant sunlight but lowlevels of nutrients.b. Because there isn’t enough sunlight for photosynthesis,deep waters typically have no life.c. Surface waters in the open ocean have the highestproductivity.d. Life near hydrothermal vents relies on photosynthesisfor energy.arrow_forwardExplain the difference between an ecosystem and a habitat. Why are some microbial habitats unsuitable for plant and animal life?arrow_forwardWhich of the following is NOT a question suitable for scientific inquiry? Select an answer a Which fossil fuel is the dirtiest to burn? b Is it ethical to put heavily polluting industries in low-income neighborhoods? c Does the burning of fossil fuels contribute to global warming? d Does the use of renewable energy sources contribute to ozone depletion?arrow_forward
- What process brings nitrogen from the atmosphere into living system? A. Methanogenesis B. Denitrification C. Anammox D. Nitrogen fixation E. Nitrificationarrow_forwardNitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false? A. By cyanobacteria B. By electrical discharges in the atmosphere C. By industrially synthesised fertilizer D. By denitrificationarrow_forwardAn organism is able to live well in its environment because of special characteristics called * a) Abiotic factors B) Biotic factors C)Aggregates D)Adaptationsarrow_forward
- Which of the following would not be included in a description of an organism’s niche? a. its trophic level b. the humidity and temperature it prefers c. when it reproduces d. its number of chromosomesarrow_forwardThe study of nutrient cycling though the environment is an example of which of the following? a. organismal ecology b. population ecology c. community ecology d. ecosystem ecologyarrow_forwardWhich of the following is not a fossil fuel? a. natural gas b. coal c. wood d. petroleumarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education