Homework 24: Unit 2 Biological Concepts and Processes

Front

What is a biofilm?

Back

A biofilm is a collection of microorganisms that stick to each other and often to a surface, forming a protective layer that helps bacteria evade the host's immune system.

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What are selective pressures?

Back

Selective pressures are environmental factors that influence which individuals survive and reproduce, guiding evolutionary change.

Front

How do bacteria resist antibiotics?

Back

Bacteria can resist antibiotics by producing enzymes that degrade the antibiotics, making them ineffective.

Front

What triggers the immune response?

Back

The immune response is triggered by the presence of pathogens, which are harmful microorganisms that can cause disease.

Front

What is antibiotic resistance?

Back

Antibiotic resistance is the process by which bacteria develop the ability to survive exposure to antibiotics, often through genetic changes.

Front

What role do toxins play in bacterial infections?

Back

Toxins are harmful substances produced by bacteria that can damage host tissues and contribute to disease.

Front

What is the function of the immune system?

Back

The immune system protects the body from pathogens by identifying and destroying harmful microorganisms.

Front

What is genetic drift?

Back

Genetic drift is a mechanism of evolution that involves random changes in the frequency of alleles in a population, which can lead to significant changes over time.

Front

What is the difference between pathogens and non-pathogens?

Back

Pathogens are microorganisms that cause disease, while non-pathogens do not cause disease and can even be beneficial.

Front

What is the significance of cell wall permeability in bacteria?

Back

Cell wall permeability affects how substances, including antibiotics, can enter or exit bacterial cells, influencing their susceptibility to treatment.