People and The Earth's Ecosystem

2. Adds weight to animals and farmers do this to increase sale price.
3. Any living component that affects the population of another organism, or the environment.
7. The region on, above, and below the Earth’s surface where all living organisms (plants, animals, and bacteria) exist.
9. Zones that serve as a physical barrier between human encroachment of a protected area.
11. Mass production of agricultural products.
12. Pattern of growth that has an S-shaped showing a stabilization of the population size.
13. Rate of reproduction or birth per unit time.
15. The transitory stage between open habitats such as grassland and closed canopy woodland.
16. Refers to the number of deaths.
18. The primary, habitual method of terrestrial locomotion for humans, involving walking upright on two legs.

1. The availability of this is a primary factor in population growth.
4. Refers to a group of all the organisms of the same species that inhabit a specific geographical area.
5. Large areas characterized by its vegetation, soil, climate, and wildlife.
6. Raising of animals and/or growing of crops to acquire food for consumption or distribution.
7. The development of a much larger brain in the human species than that of other primates.
8. Is the study of how organisms interact with their living environment or other organisms and with their nonliving environment.
10. The statistical study of a population and is dependent on mortality patterns and age distribution.
14. Most of these species have type I or type II survivorship curves.
17. Animal, plant, or microbe whose DNA has been altered using genetic engineering techniques.
19. The consequence of natural selection over thousands of years.