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21 questions
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- Q1Which of the following statements is TRUE about competition between organisms with the same needs when resources are limited?Animals are the only organisms that compete for resources.Both plants and animals compete for resources.Plants are the only organisms that compete for resources.Neither plants nor animals compete for resources.120s
- Q2Ants burrow into a thorn of the Acacia tree to live and eat sugar secreted by the tree. These ants are a benefit to the Acacia because they attack the tree's predators. What type of relationship do the ants and these trees share?MutualismCompetitionParasitismCommensalism120s
- Q3The picture shows different examples of decomposers. What is the main role of decomposers in food webs?to compete for oxygento provide food for the secondary consumersto recycle nutrients into soilto convert solar energy into food120s
- Q4When a bee drinks nectar from a flower, it gets pollen on its hind legs. When the bee visits another flower, it transfers pollen from the first flower to the second flower which helps the plants reproduce. What type of relationship is this?CommensalismPredator-PreyParasitismMutualism120s
- Q5Which of the following are examples of commensalism?Leeches sneak into a travelers nose as he drinks, and bites into a blood vessel for food. (leeches & human)Acacia trees provide nectar for ants to eat, and the ants sting and kill any bugs that try to eat the trees' leaves. (trees and ants)A mosquito bites your arm for a bloody snack. (mosquito & human)A cattlebird eats the insects that fly away as an ox walks along. (cattlebird & ox)120s
- Q6What is something that keeps a population size down (like weather, competition, disease, etc)?Limiting factorsCarrying capacityInvasive speciesImmigration120s
- Q7Mangrove swamps are found along the southern coasts of Florida. A mangrove swamp contains an ecosystem of many organisms living among the large roots of the mangrove trees. This food webs shows some of the relationships in that ecosystem. According to the food web, which organism is a producer in the mangrove?PelicanMoldCrabPhytoplankton120s
- Q8The diagram to the right shows feeding relationships among some of the organisms in an ecosystem. According to the diagram, which resources are some of the organisms competing over?HostsFoodHabitatWater120s
- Q9Scientists studied predator-prey relationships in a habitat. The diagram shows the feeding relationship among organisms that a scientist might find in a certain environment. Which animal is both a predator and prey?OwlCricketPlantSnake120s
- Q10A company is planning to build a new factory that uses freshwater pumped from a river to cool its machines while they operate. The company plans on constructing the new factory near an estuary. The freshwater used by the factory will be cooled back to outside temperatures and then released into the estuary. Which limiting factor in the estuary would be affected by the building of this new factory?Nutrient levels in the soilSalt levels in the waterSunlight penetrationTemperature of the water120s
- Q11Small birds called Egyptian plovers sometimes get their food by picking it off the hides of crocodiles. For this reason, they are also known as crocodile birds. Which kind of relationship do crocodiles and Egyptian plovers have?CommensalismPredatory preyMutualismParasitism120s
- Q12Why is water depth a limiting factor in the coral reef ecosystem?Sunlight does not penetrate deep water, so photosynthetic organism compete for light in shallow waters.Nutrients and gases that organisms need for respiration do not dissolve in water that is at high pressures in deep water.Shallower water has less dissolved salt, which can harm organisms that live in deeper, saltier waters.Deep water does not provide much room for movement, which fish and other marine animals need for respiration.120s
- Q13What happens to a population when a resource that is a limiting factor in the environment suddenly becomes scarce?The population size will fluctuate as individuals adapt to the reduced availability of the limiting factor.The population size will remain the same and make use of other, more abundant limiting actorsThe population size will increase until that limiting factor becomes abundant again.The population size will decrease to a size that can be supported by that limiting factor.120s
- Q14Food webs are scientific models. They are useful, but they are limited. What information is included in a food web?The amount of food energy available in an ecosystemThe number of different types of organisms in an ecosystemDefinitions of producer, consumer, and decomposerThe feeding relationships among organisms in an ecosystem120s
- Q15What type of ecological relationship is shown in the picture?MutualismCommensalismPredationCompetition120s
