91Ó°ÊÓ

What is a likely reason to explain why vertebrate animals evolved an adaptive immune system rather than an innate system involving specific responses to specific pathogens? a. An adaptive immune system requires an immense amount of information to be stored, which allows vertebrate cells to be able to mount specific responses to every pathogen. b. As new pathogens evolve all the time, it is more conservative of energy and information storage to have an adaptive immune system that can respond to same pathogens in different ways. c. As new pathogens evolve all the time, it is more conservative of energy and information storage to have an adaptive immune system that can respond to different pathogens in a specific way. d. As new pathogens evolve all the time, it is more conservative of energy and information storage to have an adaptive immune system that can respond to different pathogens in a non-specific way.

Step by step solution

01

Understand the Question

The question asks why vertebrate animals evolved an adaptive immune system rather than an innate system involving specific responses to specific pathogens. The goal is to identify the evolutionary advantage of the adaptive immune system.

02

Examine Choice A

Choice A states that an adaptive immune system requires a large amount of information to be stored, enabling vertebrate cells to mount specific responses to every pathogen. While this is true, it does not directly address the reason from an evolutionary advantage perspective in terms of energy and information storage.

03

Analyze Choice B

Choice B claims that an adaptive immune system is more conservative of energy and information storage by developing responses to the same pathogens in different ways. This is incorrect because the adaptive immune system specifically tailors its response to individual pathogens.

04

Evaluate Choice C

Choice C points out that it is more energy and information conservative to have an adaptive immune system that can respond to different pathogens in a specific way. This is consistent with how the adaptive immune system operates by recognizing and responding specifically to new and evolving pathogens, providing a clear evolutionary advantage.

05

Consider Choice D

Choice D suggests that an adaptive immune system responds to different pathogens in a non-specific way. This describes an innate immune system rather than an adaptive one, as the latter is known for its specificity.

06

Select the Best Answer

Based on the analysis, choice C is the correct answer because it correctly identifies the role of the adaptive immune system in responding to various pathogens in a specific manner, providing an evolutionary advantage by conserving energy and information.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Evolutionary Advantage

The adaptive immune system grants vertebrates a significant evolutionary advantage. Unlike the innate immune system that provides general defense, the adaptive immune system can learn and remember specific pathogens. This allows it to mount precise attacks on invaders, efficiently eliminating them.
Due to this precise targeting, the adaptive immune system evolves alongside pathogens, providing continuous updates to our defense mechanisms. This ongoing adaptation helps vertebrates survive in environments filled with constantly changing pathogens.

Immune Response

The adaptive immune response is sophisticated compared to the innate immune response. It involves two main types of cells: B cells and T cells. These cells identify and remember specific pathogens. B cells produce antibodies that neutralize invaders, while T cells can directly kill infected cells.
This highly specific response means that, once exposed to a pathogen, the body can respond more swiftly and effectively if it encounters the same pathogen again. This capability is crucial for long-term immunity and protection.

Pathogen Specificity

One of the standout features of the adaptive immune system is its pathogen specificity. This means that the immune response is tailored to target distinct characteristics of different pathogens. B cells produce antibodies that bind to specific antigens on pathogens, marking them for destruction.
This specificity ensures that each immune response is effective and minimizes unnecessary damage to the host’s own cells. The system's ability to adapt to new pathogens provides an ongoing defense as new threats emerge.

Energy Conservation

Energy conservation is a critical aspect of the adaptive immune system. By targeting responses to specific pathogens, the system avoids the need for a constant high-energy innate response, which can be draining. Adaptive immunity allows for a quicker and more efficient response without extensive use of resources.
This targeted approach is not only energy-efficient but also information-efficient. The immune memory reduces the need for storing and processing large amounts of data continuously, allowing the organism to conserve energy and focus on immediate threats more effectively.