Ecological Factors
Food Webs
Symbiosis
100
Some species are symbiotic to each other, meaning they live together in a close, long-term association. What is the term for a symbiotic relationship in which one species benefits and the other is neither harmed nor helped?
A. symbiosis
B. commensalism
C. mutualism
D. parasitism
B. commensalism
100
What would most likely happen in the ecosystem shown in the above food web if the fox population significantly increased?
A. The population of mice would increase.
B. The population of mice would decrease.
C. The population of black bears would increase.
D. The population of bees would increase.
B. The population of mice would decrease
100
Humans and dogs often have a relationship in which the dog provides protection and companionship in return for food and shelter. What type of relationship does this illustrate?
A. parasitism
B. competition
C. mutualism
D. predator/prey
C. Mutualism
200
A bird builds its nest in a tree. The bird and the nest do not harm the tree in any way.
Which type of relationship does this represent?
A. parasitism
B. competition
C. mutualism
D. commensalism
D. commensalism
200
Which of the following describes a way that decomposers are important to an ecosystem? (Choose two letter answers)
A) Decomposers break down dead plant and animal matter in an ecosystem.
B) Decomposers use sunlight to make food for an ecosystem.
C) Decomposers recycle essential nutrients back into an ecosystem.
A and C
200
A bee lands on a flower to collect nectar needed to make food. Pollen from the flower sticks to the bee’s body. The bee then flies to another flower to collect more nectar. While there, the pollen from the first flower rubs off, pollinating the plant. This allows the plant to reproduce.
Which type of relationship does this represent?
A. competition
B. commensalism
C. mutualism
D. parasitism
C. Mutualism
300
One limiting factor that impacts the sea turtle population is their nesting sites. Which of the following actions would continue to limit the nesting sites of sea turtles?
A. removal of beaches to build new businesses
B. monitoring reproductive rates of the sea turtles
C. relocating the sea turtle nests to a less populated area
D. restricting human access to the beaches during the breeding season
A. removal of beaches to build new businesses
300
Look at the food web shown above.
In this ecosystem, sperm whales are considered to be _______.
A. Decomposers
B. Producers
C. Consumers
C. Consumers
300
A fox hunts a rabbit. When the fox captures the rabbit, he consumes it. What is the primary reason for this organism interaction?
A. reproduction
B. companionship
C. nourishment
D. protection
C. nourishment
400
Which of the following describes a native population where there has been a decrease in the availability of food?
A. An extinct wolf population remains extinct in a local forest.
B. A goldfish population that has fewer individuals than the prior year.
C. A pigeon population that has the same number of offspring as the past two years.
D. A frog population has more adults in a pond than when they were counted last year.
B. A goldfish population that has fewer individuals than the prior year.
400
Which of the following best describes a relationship in the food web?
A. The mouse is a producer because it consumes the green plant.
B. The goat is a primary consumer because it is consumed by the jackal.
C. The wild cat is a secondary consumer because it consumes the rabbit.
D. The green plant is a decomposer because it is consumed by the rabbit.
C. The wild cat is a secondary consumer because it consumes the rabbit.
400
A population in an ecosystem cannot grow indefinitely. There are limiting factors in each ecosystem that keep a population within a certain size range. Which of the following is most likely NOT a limiting factor for a population of deer in a forest ecosystem?
A. the number of perching birds present
B. the amount of space in the forest
C. the amount of edible plants available
D. the number of mountain lions present
A. the number of perching birds present
500
Gopher tortoises create their homes by digging holes in well-drained sandy soils throughout the southeast region of the United States. Sometimes, a Florida pine snake will use the empty hole to shelter from weather or fire. Which of the following demonstrates the same symbiotic relationship as the tortoise and the snake?
A. Tapeworms live in the digestive system and eat partially digested food which eventually harms the host.
B. A Pseudoscorpion is a tiny scorpion with no stinger that moves from place to place by hitching a ride on much larger insects.
C. The goby fish lives in a tunnel in the sand with the blind shrimp. When a predator is near, the goby fish will touch the shrimp to warn it.
D. Moths lay eggs in the seedpods of the yucca plant. The moth larvae hatch and feed on some but not all the seeds and the moth acts as a pollinator for the plant.
B. A Pseudoscorpion is a tiny scorpion with no stinger that moves from place to place by hitching a ride on much larger insects.
500
According to the food web above, which of the following is true about lizards?
A. Ants consume lizards.
B. Lizards are not consumers.
C. Lizards consume ants.
D. Lizards eat snakes
C. Lizards consume ants