If one bacterial species is removed from an ecosystem, sometimes another species which performs a...
If one bacterial species is removed from an ecosystem, sometimes another species which performs a similar ecological role can take its place by carrying out the same function. What is the ecological term to describe this phenomenon?
Homework Answers
Keystone species is the term used to describe the phenomenon. When one species is removed from the ecosystem, then the ecosystem is shifted towards new niche where the replacement of the lost species will be done by other species, to maintain sustainability of the ecosystem. Keystone species play a very important role in the ecosystem as they help in the maintainace of the ecosystem.
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If one bacterial species is removed from an ecosystem, sometimes
another species which performs a...
What role does a bacteriophage play in transferring DNA from one bacterial cell to another?
What role does a bacteriophage play in transferring DNA from one bacterial cell to another?
Question 42 1 pts What carries a gene from one bacterial cell to another bacterial cell?...
Question 42 1 pts What carries a gene from one bacterial cell to another bacterial cell? A electrophoresis gel A restriction enzyme Polymerase chain reaction A plasmid Question 43 1 pts What is a genetically modified organism (GMO)? Any agricultural organism produced by breeding or biotechnology A hybrid organism A plant with certain genes removed An organism with an artificially altered genome
Define and provide examples of the following concepts: Environment, ecosystem, abiotic and biotic factors, natural and...
Define and provide examples of the following concepts: Environment, ecosystem, abiotic and biotic factors, natural and experimental boundaries, flows of matter and energy. Explain how the boundaries of an ecosystem may differ from those like national parks, county, state or national borders. Explain how natural features of the landscape (ex: a watershed) or biological phenomena (ex: a species range) can be used to define the boundaries of an ecosystem. Explain how ecosystems vary in size and scale, and how some...
Which of the following features is NOT a typical characteristic of a degraded ecosystem? a. dominance...
Which of the following features is NOT a typical characteristic of a degraded ecosystem? a. dominance by small, short-lived species b. simplicity in structure and function c. low rates of productivity d. rapid rate of decomposition Which of the following is a key characteristic of chemicals that bioconcentrate? a. highly abundant in the ambient environment b. organochlorines c. of low molecular weight d.fat soluble Which of the following characteristics is fundamental to a resilient ecosystem? a. the ability to return...
If a bacterial species is positive in nitrate reduction test, which one of the following best...
If a bacterial species is positive in nitrate reduction test, which one of the following best describes this bacterium? Select one: O a. It can convert nitrite or nitrogen gas to nitrate in an aerobic respiration process. b. It can convert nitrite or nitrogen gas to nitrate in a lactose fermentation process. c. It can transfer electrons to nitrate in an anaerobic respiration process. O d. It can transfer electrons from nitrate to glucose in a fermentation process,
Consider an important protein like beta-galactosidase, which breaks down lactose. Many bacterial species have beta-galactosidase. But...
Consider an important protein like beta-galactosidase, which breaks down lactose. Many bacterial species have beta-galactosidase. But that doesn't mean that the amino acid sequence of beta- galactosidase in all those bacterial species is exactly the same. Far from it. As bacteria diversified into different species over evolutionary time, beta-galactosidase encoded in the genomes of the bacteria also diversified. However, we can assume that even though beta-galactosidase diversified, it was under pressure to maintain structure and function, because the reaction it...
31. Which of the following is NOT an anti-predator defense mechanism? A. Plant chemicals, including coffee...
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A substitution mutation is one in which one nucleotide base is changed to another
2. A substitution mutation is one in which one nucleotide base is changed to another Suggest ONE substitution A G mutation in the DNA that would cause the first amino acid in the "# of Eyes" gene to change from alanine (Ala) to valine (Val). In the table below, write the original.3. There is a substitution mutation in the gene for Fangs in which the first DNA base changes from guanine to thymine. The mutation results in a genetic disorder...
from thegh Match each definition in the left column with a term Definition Terms Any relatively...
from thegh Match each definition in the left column with a term Definition Terms Any relatively discrete event in time that disrupts ecosystem,a. Disturbance community, or population structure and changes resources, substrate availability, or the physical environment. Developed the traditional succession theory in which all species act c. Clements d. Gleason Question 18. Question 19. Question 20. together throughout the very predictable pattern of succession. Climax A community that occurs late in succession whose populations remain stable until disrupted by...
4. Short response (2 sentences max, 6pts each) A. Many yeast species have only one cyclin-dependent kinase (Cdk), which activates protein targets that drive events in multiple phases of the cell cycl...
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Question 42 1 pts What carries a gene from one bacterial cell to another bacterial cell? A electrophoresis gel A restriction enzyme Polymerase chain reaction A plasmid Question 43 1 pts What is a genetically modified organism (GMO)? Any agricultural organism produced by breeding or biotechnology A hybrid organism A plant with certain genes removed An organism with an artificially altered genome
If a bacterial species is positive in nitrate reduction test, which one of the following best describes this bacterium? Select one: O a. It can convert nitrite or nitrogen gas to nitrate in an aerobic respiration process. b. It can convert nitrite or nitrogen gas to nitrate in a lactose fermentation process. c. It can transfer electrons to nitrate in an anaerobic respiration process. O d. It can transfer electrons from nitrate to glucose in a fermentation process,
Consider an important protein like beta-galactosidase, which breaks down lactose. Many bacterial species have beta-galactosidase. But that doesn't mean that the amino acid sequence of beta- galactosidase in all those bacterial species is exactly the same. Far from it. As bacteria diversified into different species over evolutionary time, beta-galactosidase encoded in the genomes of the bacteria also diversified. However, we can assume that even though beta-galactosidase diversified, it was under pressure to maintain structure and function, because the reaction it...
from thegh Match each definition in the left column with a term Definition Terms Any relatively discrete event in time that disrupts ecosystem,a. Disturbance community, or population structure and changes resources, substrate availability, or the physical environment. Developed the traditional succession theory in which all species act c. Clements d. Gleason Question 18. Question 19. Question 20. together throughout the very predictable pattern of succession. Climax A community that occurs late in succession whose populations remain stable until disrupted by...
4. Short response (2 sentences max, 6pts each) A. Many yeast species have only one cyclin-dependent kinase (Cdk), which activates protein targets that drive events in multiple phases of the cell cycle. Why doesn't this Cdk activate G1-, S-, G2-, and M-phase proteins all at the same time? B. Please describe how cell death by apoptosis can play a beneficial role in the body's healthy growth. C. For a cell starting in G1, place the following cell cycle events in...
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Amplitude=3;
fs=8000;
n=0:399;
t=0:1/fs: n*1/fs-1/fs;
signal=3+3*cos(2*pi*1100*t)+3*cos(2*pi*2200*t)+3*cos(2*pi*3300*t);
fftSignal= fft(signal);
fftSignal=f ftshift (fftSignal);
f=fs/2*linspace(-1,1,fs);
plot(f,abs(fftsignal);
xlabel('Frequency(Hz)’)
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