Biology Crossword

5. An organism that primarily eats other animals.
8. Organism that makes its own food via photosynthesis or chemosynthesis.
9. The variety of life across genes, species, and ecosystems.
13. Capacity The maximum population size an environment can sustain over time without degrading resources.
16. Group of the same species living in one area.
17. Factor Environmental factor that restricts population growth.
18. A trait shaped by natural selection that increases survival or reproduction.
19. The ecological role of a species, including resource use and interactions.

1. Change in allele frequencies in a population over generations.
2. Struggle between organisms for limited resources.
3. Selection Differential survival and reproduction based on heritable traits.
4. The physical environment where an organism lives.
6. Community of organisms plus their abiotic environment.
7. An organism that hunts and consumes other organisms.
10. Drift Random shifts in allele frequency, strongest in small populations.
11. Close biological interaction between different species.
12. Web Network of interconnected food chains showing energy flow.
14. Formation of new species through reproductive isolation.
15. A change in DNA sequence that introduces new genetic variation.
20. An organism that obtains energy by consuming plants or algae.