Natural Selection Unit Vocabulary

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Across
  1. 4. ancestor An organism that is believed to be the ancestor of two or more different species.
  2. 5. A group of living organisms that share common physical and genetic traits and can interbreed to produce fertile offspring.
  3. 10. by natural selection The process by which organisms develop traits that are better suited to their environment through natural selection.
  4. 11. The long bone located in the thigh, between the hip and the knee.
  5. 12. The units of heredity that are passed down from parents to offspring and determine an organism's traits.
  6. 15. advantage A trait or characteristic that gives an organism an advantage over others in its environment.
  7. 18. The disappearance of a species or group of organisms from the Earth.
  8. 19. reproduction Reproduction that does not involve the fusion of gametes, resulting in offspring that are genetically identical to the parent.
  9. 20. of descendants The sequence of individuals or organisms that are directly related through a series of parent-child relationships.
  10. 21. The process by which certain traits or characteristics are favored or selected for in a population.
  11. 22. A group of individuals of the same species that live in the same geographic area.
  12. 25. record The collection of all the fossils that have been discovered and studied by scientists.
  13. 28. The remains or traces of a prehistoric organism that has been preserved in rock or other materials over time.
  14. 29. A group of living organisms that share common physical and genetic traits and can interbreed to produce fertile offspring, as defined by modern scientific classification systems.
  15. 30. An organism in the earliest stages of development, from fertilization to the end of the eighth week of gestation in humans.
  16. 31. The way in which individuals or traits are spread out or distributed within a population.
  17. 33. A type of bacteria that can cause illness in humans and animals.
  18. 34. Different forms of a gene that can result in different variations of a trait.
  19. 35. A distinguishing feature or quality of a person, animal, or thing.
Down
  1. 1. interactions The ways in which living organisms interact with each other and their nonliving surroundings.
  2. 2. A characteristic or trait that can be passed down from one generation to the next through genetic information.
  3. 3. A subset of a larger group or population that is studied or analyzed to make conclusions about the larger group.
  4. 6. ancestors Parents, grandparents, or great-grandparents who directly precede an individual in their family tree.
  5. 7. selection The process by which organisms that are better adapted to their environment are more likely to survive and reproduce, passing on their advantageous traits to their offspring.
  6. 8. A change in an organism's DNA that can result in a new trait or characteristic.
  7. 9. Nonliving factors or components of an ecosystem, such as temperature or soil.
  8. 13. ancestors The earliest known human or animal relatives from long ago.
  9. 14. Living factors or components of an ecosystem, such as other organisms or food sources.
  10. 16. A group of people or animals who are born and live around the same time, and are typically of the same age group.
  11. 17. The long bone located in the upper arm, between the shoulder and the elbow.
  12. 23. A specific characteristic or feature of an individual.
  13. 24. The biological children or descendants of a parent organism.
  14. 26. information The hereditary material, such as DNA or RNA, that carries the instructions for the development and functioning of an organism.
  15. 27. Differences in physical or genetic traits among individuals within a population.
  16. 32. Whiplike structures on the surface of some cells that allow for movement.