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3 years ago

Describe the competitive exclusion principle, and explain how competitive exclusion may affect community structure.

Biology

1 answer:

VARVARA [1.3K]3 years ago

8 0

Answer and Explanation:

The <u>principle of competitive exclusion</u> says that two different species that share the same niche in the same habitat can not coexist in a stable way. This is because species with identical niches have the same necessities, which means that they will compete for the same resources. If these species have the same requirements, they can not coexist.

When two competing species coexist, this is because one of the species evolved and uses a different resource, occupies a different area or makes use of the resources at different times during the day. The result of these changes is that the species involved use different niches, a process known as <u>niche partitioning </u>or <u>niche differentiation</u>. Niche specialization might produce genotypic separation that provokes that the subpopulations of a species diverge to a completely new species.

Two species can not coexist indefinitely on the bases of the same limited resource. Exclusion occurs when the effective niche of the dominant competitor entirely fills the fundamental niche of the inferior competitor. If there is not any differentiation between them or the habitat makes it impossible to differentiate, the dominant species displaces the weak species, monopolizing the resources. The other weaker species makes use of new resources, migrates or gets extinguished.

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What is the phenotypic and genotypic ratio of a cross between 2<br> heterozygous green pea plants?

irga5000 [103]

Answer: 1:2:1

Explanation:

The genotypic ratio is 1:2:1 whereas, the phenotypic ratio is 3:1 in the monohybrid cross. 2. Dihybrid cross: It is simple defined as the cross between two pairs of contrasting characters or parental alleles. Pea shape and color are used to conduct the dihybrid cross test.

Use these 2 links to help you with more problems like this

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https://www.chegg.com/learn/biology/introduction-to-biology/cross-between-two-pea-plants

https://www.albert.io/blog/dihybrid-cross-ap-biology-crash-course/#:~:text=A%20cross%20between%20two%20plants%20that%20are%20heterozygous,alleles%29%20parents%20this%20will%20always%20be%20the%20ratio.

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3 years ago

What Is a variation?

Mumz [18]

A change or a slight difference

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3 years ago

The large population of microbes that contribute to the gut microbiota and have an important role in food processing are called:

postnew [5]

The large population of microbes that contributes to the gut microbiota and have an important role in food processing are called <u>Commensal microorganisms</u> .

The human body is host to trillions of microbes or bacteria. Most of these are useful but may become harmful when out of control.

The microbiota consists of a wide variety of bacteria, viruses, fungi ,and other microorganisms present in a singular environment such as the human digestive tract.

<h3>Gut microbiota : </h3>

The gut microbiota is vast and complex collection of microorganisms that profoundly affects human health gut microbiota are present in the digestive tract of vertebrates including humans.

The function of gut microbiota in body function includes harvesting energy from digested food, protecting against pathogens, regulating immune system and strengthening biochemical barriers of the gut and intestine changes in microbiota composition can affects these functions.

The normal gut microbiota have specific functions like host nutrition metabolism, maintenance of structural integrity of the gut mucosal barrier, helps in immunity, protect against pathogens.

<h3>Commensal microorganisms:</h3>

Commensal microorganisms are those type of microbes that reside on either surface of the body or at mucosa without harming human health . commensal bacteria are 10 times more than the cells present in our body.

Example - Streptococcus oralis and Streptococcus salivarius .

Commensal microorganisms plays an important role against pathogens including respiratory pathogens. It acts on the host's immune system to induce protective response that prevents colonization an invasion by pathogens. On the other hand these bacteria can directly inhibits the growth of respiratory pathogens by producing antimicrobial products .it also competing for nutrients and adhesion sites. Provides the host with essential nutrients.

<h3>What are microbes ?</h3>

Microbes are tiny living things that are found all around us and are too small to be seen by eye. They live in soil, water and in air. The human body is the home of trillions of microbes.

Learn more about Commensal microorganisms here:

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Organisms with small, expandable bodies, extremely large mouths, and efficient teeth are likely to be found in the:

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