Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 45, Problem 1CT
With antibiotic resistance rising, researchers are looking for ways to reduce use of these drugs. Some cattle once fed antibiotic-laced food now get probiotic feed that can bolster population of helpful bacteria in the animal's gut. The idea is that if a large population of beneficial bacteria is in place, then harmful bacteria cannot become established or thrive. Which ecological principle is guiding this practice?
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Explain Why bacteria do not cause food-borne illness until they are allowed to grow and increase their population density to a threshold number, like when being left out at room temperature for 12 hours or more.
What happens as the bacteria grow in numbers? What do pathogenic bacteria synthesize?
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What is one of the primary benefits of bioremediation?
Group of answer choices
A. to improve human health with the help of living organisms such as bacteria
B. to clean up areas polluted with toxic compounds by using bacteria
C. to improve soil quality for plant growth by using bacteria
D. to improve bacteria for production of useful chemicals
In the previous simulations we overlooked a very important component of ecosystems:
the soil microbial communities. In the following examples we will see how their
community succession changes the entire system. Going from the ecosystems that we
picture in our minds: -forest landscapes and such- to our gut microbiome or even the
artificial ecosystems created to produce food like wine or tea, microbes are everywhere.
The first example is from: Development of microbial community during primary
succession in areas degraded by mining activities
"During open-cast coal mining, large amounts of spoil material overlying coal layers are
excavated and deposited aboveground. This process leads to land degradation because it
destroys the existing ecosystems or buries them under the deposited spoil material,
which is a substrate with very low initial biological activity (Frouz & Nováková, 2005).
The type of succession here would
The second example is from: Trait-
infant gut microbiome
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Chapter 45 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 45 - Testing Biological Control Biological control...Ch. 45 - Testing Biological Control Biological control...Ch. 45 - Testing Biological Control Biological control...Ch. 45 - Prob. 4DAACh. 45 - The type of physical environment in which a...Ch. 45 - Which cannot be a symbiosis? a. mutualism b....Ch. 45 - Prob. 3SQCh. 45 - ______ can lead to resource partitioning. a....Ch. 45 - Prob. 5SQCh. 45 - Lizards that eat flies they catch on the ground...
Ch. 45 - By a currently favoured hypothesis, species...Ch. 45 - With ______, one species evolves to look like...Ch. 45 - Growth of a forest in an abandoned corn field is...Ch. 45 - Prob. 10SQCh. 45 - If you remove a species from a community, the...Ch. 45 - Prob. 12SQCh. 45 - Prob. 13SQCh. 45 - Prob. 14SQCh. 45 - Prob. 15SQCh. 45 - With antibiotic resistance rising, researchers are...Ch. 45 - Flightless birds on islands often have relatives...Ch. 45 - Some attempts to use biological controls prove...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- I think my reasoning is wrong because I keep getting Italy as the answer choice. It seems odd to me that I got Italy three times. The other option is Burkina Faso. So, it is either Italy or Burkina Faso. Please carefully review my answer choices because I could be WRONG. Richness refers to the total number of species of microbe in the gut microbe. Italy, Europe seems to have greater gut microbe richness. Diversity- It is the variety of species Italy has a greater variety of species. Evenness refers to the distribution of abundance across the species in the community. Italy seems to have greater evenness as the species percentage is almost similar.arrow_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_forwardYou place two species of bacteria in a 50%/50% ratio into a test tube with nutrients that favor the growth of both bacterial species. After two days the ratio is 80%/20%. Assuming that the bacteria do not attack each other, do you think this is an example of competition?arrow_forward
- Under ideal conditions, a population of bacteria can grow to more than 1036 in 24 hours. This is a statement of the populations: a. Density b. Carrying capacity c. Growth rate d. Biotic potentialarrow_forwardWhich of the following factors would explain why there is a decreasing trend of microbial population from top to bottom? A. There is a shift in the condition form oxic to anoxic. B. All statements are acceptable. C. The soil particles become larger and not weathered. D. There is a decrease in the available nutrients.arrow_forwardwhat is mutualism? mention any two example where the organisms involved are commercially exploited in modern agriculture.arrow_forward
- Large amounts of nitrates in fertilizer can indirectly harm sea otters and even more directly degrade ecosystems because nitrates contain large quantities of bacteria that cause infections in sea otters they stimulate the growth of algae, increasing kelp growth they reduce seaweed growth, degrading kelp forest habitat and reducing the number of sea urchins for sea otters to eat nitrates contribute to tree growth along beaches, dramatically changing ocean habitats nitrates encourage sea urchin growth, meaning that there is not enough food for the sea ottersarrow_forwardAnswer these two questions A) What are the abiotic factors that support different types of life? B) Explain how ecosystem diversity results in species diversity in a healthy biospherearrow_forwardAll of the following choices are autotrophic organisms, EXCEPT for Select the correct response: The Titan Arum "Methusalah" - Bristlecone Pine The Corpse Flower "Hyperion" - Redwoodarrow_forward
- Identify one problem created by the introduction of the invasive species. Provide a solution for the removal of the invasive species. Explain your solution for the removal of the native species, economy and/or social impacts? How long do you think it will take to return to the original biodiversity of the ecosystem based on your solution and why?arrow_forwardConsider figure 49.8 in the textbook. Note the red versus blue squares and the red versus blue bars in the graph. Please choose all applicable options. a.The difference in color (red versus blue) corresponds to a difference in an abiotic factor. b.The difference in color intensity (dark red versus light red) corresponds to a difference in a biotic factor. c.The difference in color (red versus blue) corresponds to a difference in a biotic factor. d.The difference in color intensity (dark red versus light red) corresponds to a difference in an abiotic factor.arrow_forwardThe picture shows two food chains in a paracitic community study it and complete the following statementarrow_forward
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