Evolution And Natural Selection

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Across
  1. 3. a loss of genetic variation that occurs when a small group of individuals establishes a new population, leading to a new population with a different genetic makeup than the origina
  2. 5. the movement of genetic material (genes or alleles) from one population to another
  3. 9. the reciprocal evolutionary change between two or more interacting species, where each species' evolution is influenced by the evolution of the other(s).
  4. 11. the random fluctuation of allele frequencies within a population's gene pool, leading to changes in genetic composition over time, especially in small populations
  5. 12. the process by which organisms with traits better suited to their environment tend to survive and reproduce more successfully, leading to the gradual evolution of populations over time
  6. 15. the complete disappearance of a species from Earth, meaning no living individuals of that species remain.
  7. 16. the production of new organisms by the combination of genetic information of two individuals of different sexes
  8. 17. an extreme example of genetic drift that happens when the size of a population is severely reduced
  9. 18. organisms whose cells contain a nucleus and other membrane-bound organelles
  10. 19. a mode of reproduction in which a new offspring is produced by a single parent
  11. 20. the process whereby distantly related organisms independently evolve similar traits to adapt to similar necessities.
Down
  1. 1. organisms whose cells lack a nucleus and other organelles
  2. 2. the evolutionary process whereby an organism becomes better able to live in its habitat or habitats.
  3. 4. body parts in different species that have similar functions but evolved independently
  4. 6. the branch of biology that studies the formation and development of an embryo and fetus
  5. 7. any physical feature or body part of an organism that helps it survive and reproduce in its environment
  6. 8. the evolutionary process by which new species arise, often through reproductive isolation and the accumulation of genetic differences between populations
  7. 10. an anatomical feature or behavior that has lost its original function in the course of evolution, but is still present as a remnant of an ancestor's structure or behavior
  8. 13. the process where humans intentionally choose which organisms with desired traits will reproduce
  9. 14. the process where two or more related species become increasingly different over time