[tex]
\[
\begin{tabular}{|l|l|}
\hline
4. & A graph showing the likelihood of survival within a group or population by age \\ \hline
5. & A group of individuals that interbreed and have fertile offspring \\ \hline
7. & A characteristic of the environment that restricts population growth \\ \hline
9. & The pattern of population growth where the population increases by a fixed percentage each year \\ \hline
11. & The number of individual organisms present in a population at a given time \\ \hline
12. & The members of a species in an area \\ \hline
14. & All of the population in a particular area \\ \hline
17. & Nonliving parts of an ecosystem \\ \hline
20. & The pattern of population growth in which exponential growth is slowed and finally stopped by limiting factors \\ \hline
\end{tabular}
\]
\]

[tex]
\[
\begin{tabular}{|l|l|}
\hline
1. & The seasonal movement by people into and out of a given area \\ \hline
2. & The living parts of an ecosystem \\ \hline
3. & The regions of the surface, atmosphere, and hydrosphere of the Earth (or analogous parts of other planets) occupied by living organisms \\ \hline
6. & The number of individuals in a population per unit area \\ \hline
8. & The largest population a given environment can support \\ \hline
10. & The natural home or environment of an animal, plant, or other organism \\ \hline
13. & The movement of individuals away from a given area \\ \hline
15. & The proportion of males to females in a population \\ \hline
16. & A biological community of interacting organisms and their physical environment \\ \hline
18. & The movement of individuals into a given area \\ \hline
19. & The relative number of organisms of each age within a population \\ \hline
\end{tabular}
\]
\]