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HACTEHA [7]
3 years ago
6

Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, ki

lled almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease. The population shares the public water source. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?
Biology
2 answers:
Luba_88 [7]3 years ago
7 0
The limiting factor was pure water
fenix001 [56]3 years ago
4 0

Answer:

The correct answer is- density dependent factor.

Explanation:

Density dependent limiting factor is only relevant where carrying capacity exceeded in a particular habitat . Density dependent factor is a factor that limiting the population size whose effect depend on the number of individuals or people in a population.

Densely packed populations can easily read the disease such as typhoid due to close proximity to one another of the individuals of the population.

Thus, the correct answer is - density dependent factor.

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How has nearly all the food we eat been "genetically modified" in the broadest sense of the term?
sveta [45]
In the broadest sense of the term, we have modified the genes of almost everything. We used selective breeding to breed the most resistant form of crops, the largest sized chickens, and others. In recent years we have even modified them through gene splicing and other methods. Nearly everything we eat, including including "organic" foods have been changed from their original DNA structure, in fact we do not even know anything's original genetic structure because of this. Genetic modification could also include mutations. Some crops have mutated due to pollution, disease, or other effects such as climate change. Without genetic modification our world would differ from what it looks like today.
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3 years ago
Which of the following is NOT likely to cause increased rates of mutation in an organism
alekssr [168]

Answer:

B. exposure to bacteria

Explanation:

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3 years ago
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The land management technique of _____ helps limit topsoil loss.
ValentinkaMS [17]

(strip cropping)   cultivation of crops in strips following the contours of the land to minimize erosion..... 

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In the spotted tulip, white flowers are dominant to yellow (gene Y), and axial flowers are dominant terminal flowers (gene T). E
aleksklad [387]

Answer:

<em>9/16 A_B_ White colour, axial flower </em>

<em>3/16 A_bb White colour, terminal flower</em>

<em>3/16 aaB_ Yellow colour, axial flower</em>

<em>1/16 aabb Yellow colour, terminal flower</em>

Explanation:

Let the flower colour allele be represented by A and the flower position by B. The dominant white colour would be A while the alternate version (the yellow colour) would be a. Also, the dominant axial flower position would be B while the alternate terminal position would be b.

The Punnet's square result of crossing two plants that are heterozygous for both traits is as in the attached image.

AaBb   x   AaBb

Possible Offspring

<em>9/16 A_B_ White colour, axial flower </em>

<em>3/16 A_bb White colour, terminal flower</em>

<em>3/16 aaB_ Yellow colour, axial flower</em>

<em>1/16 aabb Yellow colour, terminal flower</em>

3 0
3 years ago
g The Electron Transport Complex (ETC) consists of four proteins. How many of these proteins directly contribute to the proton g
vladimir2022 [97]

Answer:

Three proteins directly contribute to the proton gradient by moving protons across the membrane

Explanation:

The Electron transport chain is a group of proteins and molecules incrusted in the internal mitochondrial membrane and organized into four complexes, I, II, III, and IV. These complexes contain the electron transporters and the enzymes necessary to catalyze the electron transference from one complex to the other. Complex I contains the flavine mononucleotide -FMN- that receives electrons from the NADH. The coenzyme Q, located in the lipidic interior of the membrane, conducts electrons from complex I and II to complex III. The complex III contains cytochrome b, from where electrons go to cytochrome c, which is a peripheric membrane protein. Electrons travel from cytochrome c to cytochromes a and a3, located in the complex IV. Finally, they go back to the matrix, where they combine to H+ ions and oxygen, to form the water molecule. As electrons are transported through the chain, protons are bombed through three proteinic complexes from the matrix to the intermembrane space. These are complexes I, III and IV.  

6 0
3 years ago
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