せいぞん生存seizon
1.

The state or condition of a living organism continuing to be alive and functioning within its environment.

2.

The act of remaining alive and sustaining life, often in the context of overcoming challenges or threats to one's existence.

3.

The phenomenon of life persisting over time, particularly in relation to competition and adaptation within ecosystems.

Example:

その子の生存に対する希望は急速に消えつつある。

せいぞんしゃ生存者seizonsha
1.

A person who continues to live, especially after a challenging or life-threatening event.

2.

An individual who remains after a severe incident, often in the context of an accident or disaster.

Example:

その地震の生存者は2名だけだった。

せいぞんきかん生存期間seizonkikan
1.

A span of time during which a living organism remains alive, encompassing all experiences and events from birth until death.

2.

The duration of existence attributed to an individual, often considered in the context of their biological, social, and psychological activities.

3.

The total length of an individual's life, typically measured from the moment of birth to the moment of passing away, reflecting the potential for growth and development within that period.

てきしゃせいぞん適者生存tekishaseizon
1.

A phenomenon in which only those organisms that are best adapted to their environment survive and reproduce, while the less suited are eliminated.

2.

The concept that, in the struggle for existence, the species most suited to a particular environment will thrive and perpetuate its lineage, highlighting the role of natural selection.

3.

An idea originating in evolutionary theory that emphasizes the importance of adaptability in the survival of organisms within competitive ecosystems, where the most fit individuals prevail.

Example:

これはいわゆる適者生存の例である。

せいぞんきょうそう生存競争seizonkyousou
1.

A concept in evolutionary theory, originally articulated by Darwin, which describes the natural competition among organisms for limited resources, leading to the survival of those best adapted to their environment, while others are eliminated.

2.

A broader application of the idea, referring to the fierce competition within human society for survival and the attainment of status, often characterized by a "survival of the fittest" mentality.

3.

The ongoing contest among living beings where they strive to outlive one another, often resulting in the expulsion of weaker members from their environment or niche.

4.

The inherent challenge faced by organisms due to finite resources, which necessitates competition both within and between species, influencing population dynamics and ecosystem balance.