EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 57, Problem 4Q
Summary Introduction
To review:
The problem of hypoxia in aquaculture operations and the effect of total organic carbon (TOC) on oxygen levels.
Given:
Aquaculture farming such as mussel farming can cause hypoxia or low level of oxygen, which is available in water.
Introduction:
Aquaculture farming, which is also known by the name of aquafarming, is the farming, which involves rearing of mollusks, fishes, plants, crustaceans, algae, etc. for a commercial purpose. The concern with aquaculture is the amount of waste and organic matter, which is produced by it, which can eventually cause pollution if these substances get released to into the coastal waters or other aquatic ecosystems.
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Can you please help answer this question regarding the graph it shows?
You can determine the Z-value for both organisms by calculating the temperature change required to reduce the D value by 1 log cycle.
(Observations: Notice the difference in the two organisms. One has a steeper downward slope, but is offset higher. It is slightly more heat-tolerant, but slightly more susceptible to increases in temperature.)
Question: Raw milk can be contaminated by several common pathogenic bacteria (i.e. Staphylococcus, M. tuberculosis) and therefore must be pasteurized. Your goal is to find the minimum temperature and time required to destroy these organisms. If you know the Z-values for staphylococcus and M. tuberculosis, do you have enough information to set the appropriate heating parameters?
Using the data in the photo of the two syringes below, answer these six questions:
QUESTIONS
1. Which syringe had the most floating disks? Why?
2. What is the gas being released by the leaf disks?
3. Which syringe is the control?
4. Which syringe is the experimental?
5. What is the experimental variable in this experimental design?
6. List at least two controls in this experimental design.
Chapter 57 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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