What kind of symbiosis exists between a pneumonia bacterium and a human?

Question

What kind of symbiosis exists between a pneumonia bacterium and a human??  
A. Mutualism  
B. Parasitism  
C. Commensalism  
D. Competition

Accepted Answer

Correct Answer: (B)Parasitism. 
Rationale: The correct type of symbiosis is parasitism.A pneumonia-causing bacterium lives in or on the human body, gains nutrients and a place to reproduce, and in the process harms the human host by damaging lung tissue and interfering with normal breathing.A) MutualismMutualism is a relationship in which both organisms benefit.Examples include:Humans and gut bacteria that help digest foodBees and flowering plants during pollinationIn pneumonia infection, only the bacterium benefits. The human does not benefit and instead becomes ill. Therefore, this relationship is not mutualism.B) ParasitismParasitism is a relationship in which:One organism benefits (the parasite)The other organism is harmed (the host)Pneumonia bacteria such as Streptococcus pneumoniae or Klebsiella pneumoniae enter the lungs and:Use the host’s nutrientsMultiply inside lung tissueTrigger inflammation and fluid buildupDamage alveoli, reducing oxygen exchangeThis causes symptoms such as coughing, fever, chest pain, and difficulty breathing. In severe cases, it can be fatal.The bacterium benefits by surviving and reproducing, while the human is harmed. This exactly matches the definition of parasitism.C) CommensalismCommensalism occurs when:One organism benefitsThe other is neither helped nor harmedSome bacteria on human skin or in the intestines are commensal because they live on the body without causing disease.Pneumonia bacteria do not fit this category because they clearly cause harm to the human host. Therefore, this option is incorrect.D) CompetitionCompetition occurs when two organisms fight for the same limited resource, such as:Two animals competing for foodTwo plants competing for sunlightA bacterium infecting a human is not competing with the human for external resources. Instead, it is living inside the host and exploiting the host’s tissues. Therefore, this is not competition.ConclusionA pneumonia bacterium benefits by living and reproducing inside the human body, while the human is harmed by infection and disease. This interaction fits the definition of parasitism.The correct answer is B) Parasitism

What kind of symbiosis exists between a pneumonia bacterium and a human?

A
Mutualism

B
Parasitism

C
Commensalism

D
Competition

The correct type of symbiosis is parasitism.

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Related Questions

What kind of symbiosis exists between a pneumonia bacterium and a human?

A Mutualism B Parasitism C Commensalism D Competition

The correct type of symbiosis is parasitism.

Topic Flashcards

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Related Questions

A
Mutualism

B
Parasitism

C
Commensalism

D
Competition