Question

an individual is infected with a pathogen that absorbs nutrients from its environment. in which category does this pathogen belong?
a. bacteria
b. fungi
c. protozoa
d. virus
please select the best answer from the choices provided.
a
b
c
d

Explanation:

• Bacteria: They can obtain nutrients through various means like photosynthesis (some), chemosynthesis (some), or by consuming organic matter. But the key characteristic of absorbing nutrients from the environment in a more typical saprophytic (feeding on dead organic matter) or parasitic (feeding on living hosts) way with the absorptive mode is more strongly associated with fungi among the options.
• Fungi: Fungi are heterotrophic organisms. They secrete digestive enzymes into their environment (extracellular digestion) and then absorb the digested nutrients. This absorptive mode of nutrition is a hallmark of fungi.
• Protozoa: Protozoa can have different modes of nutrition. Some are autotrophic (e.g., euglena in the presence of light), but many are heterotrophic. However, their mode of nutrition is often holozoic (ingesting food particles) rather than purely absorptive like fungi.
• Virus: Viruses are not considered living organisms in the traditional sense. They do not have a metabolism of their own. They rely on host cells for replication and do not absorb nutrients from the environment in the way described.

Answer:

B. fungi