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Related Concept Videos

Taxonomy01:31

Taxonomy

Taxonomy is the science of defining and naming groups of biological organisms based on shared characteristics. It uses a hierarchy of increasingly inclusive categories with Latin names. The smallest units of taxonomy, species and genus, are used to assign a formal, taxonomic name to each species in a system. This classification system, referred to as binomial nomenclature, was formalized by Carolus Linnaeus in the 18th century.Hierarchy of TaxonomyThe hierarchy that Carolus Linnaeus first...
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Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a pivotal role in the...
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Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...
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Inclusive Fitness

Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.
Tonicity in Animals00:59

Tonicity in Animals

The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
Tonicity in Animals01:16

Tonicity in Animals

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Related Experiment Video

Updated: Jul 13, 2026

Helminth Collection and Identification from Wildlife
09:37

Helminth Collection and Identification from Wildlife

Published on: December 14, 2013

All creatures great and small.

Phillip Gray1

  • 1Rural Clinical School, Australian National University. gray.qbn@effect.net.au

Australian Family Physician
|August 7, 2007
PubMed
Summary

A common multisystem infection can present diagnostic challenges, even in a holiday setting. General practitioners should remain vigilant for this potentially serious febrile illness.

Area of Science:

  • Infectious Diseases
  • Clinical Medicine
  • Pediatrics

Background:

  • The case illustrates diagnostic challenges in identifying febrile illnesses, particularly in non-traditional clinical settings.
  • Highlights the importance of considering common yet potentially serious infections in primary care.

Observation:

  • A febrile illness presented diagnostic difficulties during a holiday, impacting a man and his grandson.
  • The case underscores the need for thorough diagnostic evaluation in primary care.

Findings:

  • The article details the clinical course and diagnostic considerations of a multisystem infection.
  • Emphasizes the potential severity and varied presentation of common infections.

Implications:

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Last Updated: Jul 13, 2026

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  • Reminds general practitioners of the diagnostic complexities associated with common infections.
  • Suggests a need for heightened awareness and diagnostic preparedness among primary care physicians for febrile illnesses.