chemical defense
- noun
- /ˈkɛmɪkəl dɪˈfɛns/
- Specialized
- Sponge recruitment to a shipwreck confirms chemical defense trade-off.
- sponge chemical defenses
- chemical defenses in Caribbean
- trade-off between chemical defenses
Examples
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Although the specific compounds responsible for chemical defense against hermit crabs and seastars were not determined, it seems likely that sponge chemical defenses may be broadly effective against vertebrate and invertebrate predators.
Academic text (2011) -
Unlike terrestrial plants, Caribbean reef sponges rely primarily on chemical defenses (when they have them at all) and not on defenses associated with their skeletons or on low nutritional quality.
Academic text (2011) -
Study of the natural sources of many animals' chemical defenses is providing new insights into nature's medicine chest.
Academic text (1999) -
Even the most toxic of chemical defenses requires a nibble from a predator.
Academic text (1999) -
Some insects have evolved the ability to thwart plant chemical defenses; in some cases, they store and use the metabolites to protect themselves from their own predators.
Academic text (2011) -
Caribbean sponges provide an important alternative to terrestrial plant and insect communities for testing basic ecological theories about chemical defenses and resource allocation.
Academic text (2011) -
The rapid recruitment of chemically undefended sponge species to the wreck is evidence of a resource trade-off between chemical defenses and growth or reproduction among Caribbean sponge species.
Academic text (2011) -
Organizations implement chemical defense strategies to safeguard workers from hazardous substances during manufacturing.
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The army trained soldiers in chemical defense techniques to prepare them for potential attacks with toxic agents.
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Research on chemical defense methods aims to enhance safety protocols for dealing with harmful chemical spills.
How Effective
- Specialized
Surface Forms
Morphology
The meaning is directly compositional: 'chemical' (relating to chemical agents) modifies 'defense' (measures for protection), so a learner who knows both words can infer 'measures to protect against chemical agents'. This adjective+noun combination follows common, cross-linguistic compounding patterns and should be immediately understandable to a B1 learner.
Etymology
Chemical defense may come from the simple image of people wearing suits and gas masks to stop dangerous chemical attacks, acting like a strong defense or shield. So, it now means 'steps to protect people from dangerous chemicals'.