biodiversity

2. (POPULATION): A group of individuals of the same species living in the same area at the same time and sharing resources. (10 letters: POPULATION)
4. (NATIVE): A species that naturally occurs and has evolved in a particular region or ecosystem without human introduction. (6 letters: NATIVE)
8. A species that is native to and found exclusively in a specific geographic location and nowhere else on Earth. (7 letters)
9. A species facing a high risk of extinction in the wild if the conditions threatening its survival continue. (10 letters: ENDANGERED)
10. A species introduced to an environment outside its natural range, often brought by human activity. (13 letters: EXOTIC SPECIES)
11. A species that no longer exists anywhere on Earth; gone forever with no living members remaining. (7 letters: EXTINCT)
12. The variety of life on Earth, including all living organisms, their genetic information, and the ecosystems they form. (12 letters)

1. (SPECIES BIODIVERSITY): The number and variety of different species found within a specific area or ecosystem. (7 letters: SPECIES — as part of SPECIES BIODIVERSITY)
3. A species that has a disproportionately large effect on its ecosystem relative to its abundance — its removal causes dramatic ecological collapse. (8 letters)
5. The variety of different habitats, biological communities, and ecological processes found across a region. (9 letters: ECOSYSTEM)
6. A group of organisms of the same kind that can interbreed and produce fertile offspring; the basic unit of classification. (7 letters: SPECIES)
7. A non-native species that spreads aggressively, causes harm to the environment, economy, or human health. (8 letters: INVASIVE)
8. The variety of genes within and between populations of a species; the raw material for evolution and adaptation. (7 letters: GENETIC)
9. A species that is likely to become endangered in the near future if threats to its survival are not addressed. (9 letters: THREATENED)