defense

(noun)

The action of defending or protecting from attack, danger, or injury.

Related Terms

Examples of defense in the following topics:

  • Plant Defenses Against Pathogens

    • The first line of defense in plants is an intact and impenetrable barrier composed of bark and a waxy cuticle.
    • If the first line of defense is breached, the plant must resort to a different set of defense mechanisms, such as toxins and enzymes.
    • Additionally, plants have a variety of inducible defenses in the presence of pathogens.
    • Mechanical wounding and predator attacks activate defense and protective mechanisms in the damaged tissue and elicit long-distancing signaling or activation of defense and protective mechanisms at sites farther from the injury location.
    • Some defense reactions occur within minutes, while others may take several hours.

  • Plant Defenses Against Herbivores

    • The first line of defense in plants is an intact and impenetrable barrier composed of bark and a waxy cuticle.
    • If the first line of defense is breached, the plant must resort to a different set of defense mechanisms, such as toxins and enzymes.
    • Mechanical wounding and predator attacks activate defense and protective mechanisms in the damaged tissue and elicit long-distancing signaling or activation of defense and protective mechanisms at sites farther from the injury location.
    • Some defense reactions occur within minutes, while others may take several hours.
    • The spines on cactus plants are modified leaves that act as a mechanical defense against predators.

  • The Cabinet

    • The secretary of state and secretary of defense play key roles in assisting the president with foreign policy.
    • This includes the secretary of state and the secretary of defense.
    • The Secretary of Defense is the head and chief executive officer of the Department of Defense, which is an Executive Department of the Government of the United States of America .
    • Secretary of Defense is a statutory office.
    • It is the general provision in administrative law that provides that the Secretary of Defense has "authority, direction and control over the Department of Defense. " The Secretary of Defense is further designated by the same statute as "the principal assistant to the President in all matters relating to the Department of Defense. " Ensuring civilian control of the military, an individual may not be appointed as Secretary of Defense within seven years after relief from active duty as a commissioned officer of a regular (i.e., non-reserve) component of an armed force.

  • Collective Military Force

    • Collective defense is an arrangement, usually formalized by a treaty and an organization, among participant states that commit support in defense of a member state if it is attacked by another state outside the organization .
    • The North Atlantic Treaty Organization (NATO) is the best known collective defense organization .
    • Collective defense entails benefits as well as risks.
    • On the other hand, collective defense also involves risky commitments.
    • Compare and contrast the concepts of collective security and collective defense

  • Dover Castle in England

    • The architecture of Dover Castle was largely influenced by defensive considerations.
    • It was founded in the twelfth century and has been described as the "Key to England" due to its defensive significance throughout history .
    • By the Tudor age, the defenses themselves had been superseded by gunpowder.
    • William Twiss, the Commanding Engineer of the Southern District, as part of his brief to improve the town's defenses, completed the remodeling of the outer defenses of Dover Castle.
    • Twiss also constructed Canon's Gateway to link the defenses of the castle with those of the town.

  • Predation, Herbivory, and the Competitive Exclusion Principle

    • These defenses may be mechanical, chemical, physical, or behavioral.
    • This type of defensive mechanism is called aposematic coloration, or warning coloration .
    • The (a) honey locust tree (Gleditsia triacanthos) uses thorns, a mechanical defense, against herbivores, while the (b) Florida red-bellied turtle (Pseudemys nelsoni) uses its shell as a mechanical defense against predators.
    • (d) The North American millipede (Narceus americanus) uses both mechanical and chemical defenses: when threatened, the millipede curls into a defensive ball, producing a noxious substance that irritates eyes and skin.
    • Distinguish between predation and herbivory and describe defense mechanisms against each

  • Providing National Security

    • These organizations include the Department of Defense, the Department of Homeland Security, the Central Intelligence Agency, and the White House National Security Council.
    • The Department of Defense is responsible for coordinating and supervising all agencies and functions of the government concerned directly with the U.S.
    • The Department—headed by the Secretary of Defense—has three subordinate military departments: the Department of the Army, the Department of the Navy, and the Department of the Air Force.

  • Host Range

    • The defenses mounted by the host may act directly on the virus or indirectly on virus replication by altering or killing the infected cell.
    • Non-specific host defenses function early in an encounter with a virus to prevent or limit infection, while the specific host defenses function after infection in recovery to provide immunity for subsequent challenges.
    • The host defense mechanisms involved in a particular viral infection will vary depending on the virus, dose, and portal of entry.
    • These represent the first line of defense, which functions to prevent or limit infection Examples of natural barriers include but are not limited to skin, the expression of surface receptors such as CD4, complement receptors, glycophorin, intercelullar adhesion molecule 1 (ICAM-1) , mucus, a ciliated epithelium, low pH, and humoral and cellular components.

  • Defending the Nation

    • One of the most important functions of the U.S. government is to provide common defense and security for its citizens.
    • The United States has the largest defense budget in the world.
    • The President helps form military policy with the United States Department of Defense.
    • The United States has the largest defense budget in the world .
    • The United States has the largest defense budget in the world.

  • National Security

    • At the same time, the NME was renamed as the Department of Defense.
    • The radio program Stars for Defense combined hit music with civil defense advice.
    • The Federal Civil Defense Administration produced a short movie called Our Cities Must Fight.
    • However, civil defense officials still worked to prepare evacuation plans.
    • Civil Defense literature such as Survival Under Atomic Attack was common during the Cold War Era.