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31 (5 marks) (a) Outline ONE adaptation of a specific pathogen that facilitates its entry into a host - HSC - SSCE Biology - Question 31 - 2019 - Paper 1
Question 31
31 (5 marks) (a) Outline ONE adaptation of a specific pathogen that facilitates its entry into a host. (b) Explain how the mode of transmission of pathogens influe... show full transcript
Worked Solution & Example Answer:31 (5 marks) (a) Outline ONE adaptation of a specific pathogen that facilitates its entry into a host - HSC - SSCE Biology - Question 31 - 2019 - Paper 1
Step 1
Outline ONE adaptation of a specific pathogen that facilitates its entry into a host.
Answer
The bacterium Helicobacter pylori is adapted to survive in the acidic environment of the stomach. It has a flagellum that enables it to move through the mucus lining of the stomach, allowing it to penetrate the barrier and establish infection.
Step 2
Explain how the mode of transmission of pathogens influences the spread of diseases.
Answer
The mode of transmission of pathogens significantly impacts the spread of diseases. For example, diseases spread through droplet transmission, such as the influenza virus, can quickly infect individuals in crowded areas. When pathogens are transmitted through vectors, like mosquitoes with malaria, the spread can be influenced by environmental factors.
Additionally, if an intermediate host is present, it can slow the transmission rate, altering the dynamics of disease spread. Understanding these modes allows for better control strategies and public health measures.