Across
- 4. The way in which a species spends energy to produce viable offspring. (2 words)
- 5. Individuals in a population that are not yet sexually mature and can’t reproduce.
- 6. Phase of population growth where the birth rate and death rate become equal, and the population stops growing and reaches a relatively stable population size. (2 words)
- 7. How a population occupies space the space it inhabits. (2 words)
- 9. Phase of population growth where it begins to slow as the death rate and the birth rate get closer to one another.
- 12. Phase of population growth where it grows very slowly because there are few births.
- 13. Phase of population growth where the birth rate increases so it begins to increase at an accelerating rate. (2 words)
- 18. All of the different limiting factors that act on a population. (2 words)
- 20. The number of individuals that die per 1,000 individuals per year. (2 words)
- 21. Large organisms that have relatively long lives, produce few offspring, provide care for their offspring, and typically have populations that stabilize at the carrying capacity. (2 words)
- 23. This type of growth model results in a population increasing by the same percentage each year.
- 24. The maximum population size of a species that can be sustained by that specific environment. (2 words)
- 27. A group of individuals of the same species inhabiting an area.
- 30. Study of factors that cause populations to increase or decrease. (2 words)
- 33. This type of survivorship curve has a relatively constant decline in survivorship throughout most of the life span. Here, death is independent of age.
- 37. This type of limiting factor controls a population outside of it.
- 38. Type of limiting factors that become more severe as the size of the population increases. (2 words)
- 39. The movement from densely populated locations to new areas, thereby expanding the space or range within which they live. (2 words)
- 40. This type of curve graphically represents the change in a population growing exponentially over time. (2 words)
- 41. This type of limiting factor controls a population from inside the population itself.
- 42. Maximum reproductive capacity of an organism under optimum environmental conditions. (2 words)
- 44. The number of organisms per unit area. (2 words)
- 45. This type of survivorship curve has low survivorship early in life with few individuals reaching adulthood.
- 46. When an individual moves into a population in a given area.
- 47. Typically small organisms that have a short lifespan, produce a large number of offspring, and do not reach a carrying capacity. (2 words)
Down
- 1. The total number of individuals within a defined area at a given time. Denoted by the letter N. (two words)
- 2. Shows the proportion of individuals likely to survive to each age. (2 words)
- 3. Individuals in a population that are past the age of reproduction.
- 8. How much time is needed for a population to double in size. (2 words)
- 9. The idea that economies proceed through a series of stages, beginning with growing populations with high birth and death rates and low economic development and ending with stable populations with low birth and death rates and high economic development. (2 words)
- 10. Individuals in a population that are sexually mature and able to reproduce.
- 11. The birth rate minus the death rate of a population. (2 words)
- 14. This type of growth model describes a population whose growth is initially exponential, but slows as the population approaches the carrying capacity of the environment.
- 15. The number of deaths in a population over a particular time period.
- 16. This type of survivorship curve has high survival throughout most of the life span, but then individuals start to die in large numbers as they approach old age.
- 17. Type of limiting factors that are not related to the density of the population. (2 words)
- 19. When an individual moves away from a population in a given area.
- 22. The number of individuals added to the population through reproduction over a particular time period.
- 25. An organism’s ability and/or rate of producing offspring.
- 26. When a population becomes larger than the environment’s carrying capacity. (2 words)
- 28. A measure of the land area required to provide the resources and absorb the wastes of a population. (2 words)
- 29. Periods of relatively large populations followed by periods of small populations. (2 words)
- 31. The number of individuals born per 1,000 individuals per year. (2 words)
- 32. This type of curve graphically represents the change in a population growing logistically over time. (2 words)
- 34. The number of individuals of each age in the population. (2 words)
- 35. These types of factors prevent unlimited population growth.
- 36. The relative numbers of males and females in a population. (2 words)
- 43. Acronym/formula for the factors that interact to determine the impact of a society on the resources of its country.