Each of the following is an abiotic factor in the environment EXCEPT

1. Each of the following is an abiotic factor in the environment EXCEPT • plant life • soil type • Rainfall • temperature

2. Which is a biotic factor that affects the size of a population in a specific ecosystem? • average temperature of the ecosystem • type of soil in the ecosystem • number and kinds of predators in the ecosystem • concentration of oxygen in the ecosystem

3. During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. This behavior is probably due to • its need to find different foods to eat • the change in an abiotic factor in its environment • its need to find a new habitat • the change in a biotic factor in its environment

4. An interaction in which one organism captures and feeds on another organism is called • Competition • Symbiosis • Mutualism • Predation

5. A symbiosis in which both species benefit is • Commensalism • Mutualism • Competition • Parasitism

6. The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of • mutualism because the flower provides the insect with food, and the insect pollinates the flower • parasitism because the insect lives off the nectar from the flower • commensalism because the insect does not harm the flower and the flower does not benefit from the relationship • predation because the insect feeds on the flower

7. When individuals in a population reproduce at a constant rate, it is called • logistic growth • growth density • exponential growth • multiple growth

8. As resources in a population become less available, population growth • declines rapidly • increases slowly • reaches carrying capacity • enters a phase of exponential growth

9. In a logistic growth curve, exponential growth is the phase in which the population • reaches carrying capacity • grows quickly and few animals are dying • growth begins to slow down • growth stops

10. A biotic or an abiotic resource in the environment that causes population size to decrease is a • carrying capacity • limiting nutrient • limiting factor • growth factor

11. All of the following are limiting factors EXCEPT • Immigration • Competition • Predation • Human disturbances

12. If a population grows larger than the carrying capacity of the environment, the • death rate may rise • birthrate may rise • death rate must fall • birthrate must fall

13. Which of the following is characteristic of parasitism?  • One organism kills and consumes another. • Two organisms live together and neither is harmed • Two organisms feed side by side from the same food. • One organism lives in or on another and benefits. 

14. An ecosystem is made up of: • living things only • Physical environment only • living things and the physical environment • living things and decaying matter

15. When a rabbit population in a meadow cannot grow any larger, it has reached the • Climax community • Carrying capacity • Limiting factor • Minimum size

16. A population of rabbits is at its carrying capacity when the population • Reproduces • becomes extinct • stops growing • can’t survive

17. An unusually cold winter causes the squirrel population to decrease. This is an example of temperature as a • carrying capacity • Limiting factor • Climax community • Pattern in space

18. Many individuals of the same species living together in a defined area form a/an  • Community • Ecosystem • Population • Biome

19. Which of the following is characteristic of parasitism?  • One organism kills and consumes another. • Two organisms live together and neither is harmed • One organism lives in or on another and benefits. • Two organisms nourish each other; both benefit.

20. Which list of terms is in the correct order, from simplest to most complex? • organism, community, population, ecosystem, biome • organism, population, community, biome, ecosystem • organism, population, community, ecosystem, biome • organism, community, ecosystem, population, biome

21. All the leopard frogs in a pond make up the pond’s leopard frog: • Population • Niche • Habitat • Community

22. Biotic factors in an ecosystem may include: • bacteria, soil, and water • plants, animals, and bacteria • temperature, water, and soil • animals, fungi, and temperature

23. Certain bacteria living in a human's large intestine help to produce vitamin K. This relationship is an example of • Parasitism • Mutualism • Commensalism • Predation

24. An herbivore population may • oscillate up and down as its major predator increases and decreases in number. • exceed its carrying capacity if its major predator is removed. • exceed its carrying capacity when it is introduced to a new community. • all of the above are true.

25. Which of the following IS NOT an example of mutualism? • a flowering plant and its pollinator species • a host species and its parasite. • root fungi (mycorrhizae) and tree species • nitrogen-fixing bacteria and their host species