Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 22, Problem 7RQ
Halophiles are organisms that require
- a salt concentration of at least 0.2 M
- high sugar concentration
- the addition of halogens
- all of the above
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Extreme halophiles survive in environments that contain a high level of _______.
Question 7 options:
A)
vitamin K
B)
halogen
C)
chlorine
D)
salt
Halophiles are organisms that require________. a. a salt concentration of at least 0.2 M b. high sugar concentration c. the addition of halogens d. all of the above
You find yourself in a deep dark cave in a karstic environment and it smells like rotten eggs. In a stream you find white filaments that look like they could be microbes. You quickly realize that your shoes are being quickly damaged by the stream water that causes major irritation to your skin. Unfortunately, you do not have a pH meter and you can't really test the pH.
1. Please identify potential sources of energy, electron and carbon for these microbes.
2. What could be a possible terminal electron acceptor?
3. Name these organisms using nomenclature.
4. What could be the pH of the stream water?
Chapter 22 Solutions
Biology 2e
Ch. 22 - Figure 22.8 Compared to free-floating bacteria,...Ch. 22 - Figure 22.16 Which of the following statements is...Ch. 22 - Figure 22.19 Which of the following statements...Ch. 22 - The first forms of life on Earth were thought to...Ch. 22 - Microbial mats. are the earliest forms of life on...Ch. 22 - The first organisms that oxygenated the atmosphere...Ch. 22 - Halophiles are organisms that require a salt...Ch. 22 - Many of the first prokaryotes to be cultured in a...Ch. 22 - The presence of a membrane-enclosed nucleus is a...Ch. 22 - Which of the following consist of prokaryotic...
Ch. 22 - The cell wall is ___________ . interior to the...Ch. 22 - Organisms most likely to be found in extreme...Ch. 22 - Prokaryotes stain as Gram-positive or Gramnegative...Ch. 22 - Pseudopeptidoglycan is a characteristic of the...Ch. 22 - The lipopolysaccharide layer (LPS) is a...Ch. 22 - Which of the following elements is not a...Ch. 22 - Prokaryotes that obtain their energy from chemical...Ch. 22 - Ammonification is the process by which. ammonia is...Ch. 22 - Plants use carbon dioxide from the air and are...Ch. 22 - Cyanobacteria harness energy from the sun through...Ch. 22 - A disease that is constantly present in a...Ch. 22 - Which of the statements about biofilms is...Ch. 22 - Which of these statements is true? An antibiotic...Ch. 22 - A person in England arrives at a medical clinic...Ch. 22 - MRSA has emerged as a serious infectious disease,...Ch. 22 - Which of these occurs through symbiotic nitrogen...Ch. 22 - Synthetic compounds found in an organism but not...Ch. 22 - Bioremediation includes. the use of prokaryotes...Ch. 22 - In addition to providing yogurt with its unique...Ch. 22 - Describe briefly how you would detect the presence...Ch. 22 - Why do scientists believe that the first organisms...Ch. 22 - A new bacterial species is discovered and...Ch. 22 - Mention three differences between bacteria and...Ch. 22 - Explain the statement that both types, bacteria...Ch. 22 - A scientist isolates a new species of prokaryote...Ch. 22 - Think about the conditions (temperature, light,...Ch. 22 - Farmers continually rotate the crops grown in...Ch. 22 - Imagine a region of soil became contaminated,...Ch. 22 - Explain the reason why the imprudent and excessive...Ch. 22 - Researchers have discovered that washing spinach...Ch. 22 - Your friend believes that prokaryotes are always...Ch. 22 - Many people use antimicrobial soap to kill...
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- Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: the temperature is close to 37°C the atmosphere does not contain oxygen sugar is provided to the cells light is provided to the cellsarrow_forwardBacteria that serve as decomposers are ___ . a. photoautotrophs b. photoheterotrophs c. chemoautotrophs d. chemoheterotrophsarrow_forwardAn organism characterized as a photoautotroph obtains energy from _____ and carbon from _______. (a) light; organic molecules (b) light; CO2 (c) organic molecules; organic molecules (d) organic molecules; CO2 (e) O2; CO2arrow_forward
- An obligate halophile requires higha. pH b. temperature c. salt d. pressurearrow_forwardWhat will happen if we place a Halophilic Bacteria in hyponotic solution? Please answer at your own easy words. Answer should be to the point, maximum 100-150 words.arrow_forwardWhich of the following is most likely to be used for sewage treatment? View Available Hint(s) for Part D Acidophiles Methanogens Halophiles Hyperthermophilesarrow_forward
- An aquatic microbe that can grow only near the surface of the water is probably which of the following? a chemotroph a phototroph a heterotroph an anaerobe a lithotropharrow_forwardWhat are Halophilic Bacteria? How can we isolate Halophiles bacteria using selective media? Please answer at your own easy words. Answer should be to the point( maximum 100-150 words)..arrow_forwardFor a bacterium that prefers a neutral pH and has an optimal (best) growth pH of 7, how would growth of this bacterium at pH 4 most likely compare to growth at pH 7? Growth would be slower (or the bacterium might die) at pH 4 Growth would be faster at pH 4 Growth would be the same at both pH valuesarrow_forward
- The most efficient disinfectant chlorine, discuss why? ( subject: medical microbiology lab )arrow_forwardWhich of the following coud describe a microbe that causes a lemon left untouched in your refrigerator to spoil? Thermophile Obligate anaerobe none of these alkaliphile mesophilearrow_forwardAn acidophile would grow best at a pH of: A.6 b.2 c.12 d.7 e 9arrow_forward
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