Invasive Species, Cycles, Food Webs, Symbiotic Relationships, Po1. The amount of energy at each level of a food pyramid is about _______ of what it was on the level below.
50 percent, 25 percent, 20 percent, 10 percent
2. Organisms which can use the energy from the sun to produce their own food are called:
Autotrophs, Heterotrophs, Parasites, Bacteria
3. The close relationship between two species which interact in an ecosystem is called
Parasitism, Mutualism, Commensalism, Symbiosis
4. Factors such as food, space, and disease which limit a populations growth are known as:
the carrying capacity, limiting factors, 10 %25 law, biotic factors
5. When plotted on a graph, a population of field mice over time shows a J-shaped curve. This curve indicates that:
the population is growing linearly, the population is growing exponentially, the population is growing logistically, the population is declining
6. Part 2: When plotted on a graph, a population of field mice over time shows a J-shaped curve. This curve indicates:
The population is crashing. interactive learning , Predators of the mice are increasing., There may be no predators., Food supply is low.
7. crossword maker When populations increase, a short-supply of resources such as food or water could lead to:
exponential growth, linear growth, increased competition, decreased competition
8. Which of the following is a biotic factor in an ecosystem?
the number of predators english , the amount of light, average precipitation, average temperature
9. The most common gas in the atmosphere is:
Oxygen, Nitrogen, Carbon, Methane
10. What is the importance of nitrogen-fixing bacteria?
It decomposes dead organic material, It converts sunlight into energy, It converts the nitrogen in the air into a usable form for plants, It is a source of food for many sea creatures
11. For a non-native species to be considered invasive, which of the following must occur:
It must be introduced intentionally by humans. teacher , It must harm the environment, economy, or human health. test , It must grow very rapidly., It must be a predator of a native species.
12. sun --%3e grass --%3e deer --%3e mountain lion This is an example of:
a food chain, a food web short answer questions , mutualism, population dynamics
13. The arrows in a food web indicate:
The flow of energy, The flow of carbon, The flow of nutrients, Population growth
14. Which form of symbiosis always involves one species being harmed?
Mutualism, Commensalism, Parasitism, Conservationism
15. invite students Which form of symbiosis could always be considered a win-win situation, beneficial to both species?
Parasitism, Predation, Mutualism, Commensalism
16. Tapeworms, fleas, ticks, lice, and mosquitoes are all considered:
Predators, Producers, Parasites, Players
17. Kudzu, cane toads, zebra mussels, and giant salvinia are all considered:
Producers, Autotrophs, Invasive species, Predators
18. Exponential growth of a population tends to slow down and even-out on a graph as the population reaches:
The carrying capacity, The growth limit, The population ceiling, The top of the food web
19. The number of organisms of a single species in an environment is known as a:
Community, Biome, Ecosystem, Population
20. Populations can grow due to reproduction and immigration. Populations decline due to:
Death and emigration, Parasitism and mutualism, Carrying capacities, Competition and climate
21. Which of the following could lead to a RISE in carbon dioxide levels in the air?
Deforestation, Lowering emissions from cars and trucks, Using dams to produce electricity, Symbiosis
22. The process by which water travels through plants and evaporates through the pores in leaves, stems, and flowers is known as:
Transpiration, Condensation, Respiration, Concentration
23. The process by which poisons, toxins, and pollutants accumulate in the tissues of living organisms is called:
Bioaccumulation, Biomagnification, Symbiosis, Biomass
24. web tool Human populations have been able to grow exponentially for a long period of time because we have been able to:
Eliminate the most common limiting factors, Lower reproductive rates worldwide, Grow our own food, Leave habitats when the resources are depleted