Food webs
Which of the following is NOT a consumer?
A. Plants
B. Caterpillars
C. Frogs
D. Snakes
A. Plants
Give an example of predator-prey
When there is a lack of resources such as food, water, sunlight, shelter, and space this is often called...
limiting factors
Classify the roles of mushrooms and grass
Mushrooms: decomposers
Grass: producer
A crab eats the scraps left behind from a frog. What type of relationship is this?
Commensalism
If a predator population increases, the prey population will...
decrease
Which of the organisms in this food web gets energy from both producers and consumers?
Shrimp
Aphids are small insects that feed by burrowing their heads into the stems of plants, like orange trees, and feed on sap. When an orange tree loses its sap, it gets weaker because sap contains all the nutrients that a plant needs. As aphids live in large colonies, their number can quickly cause extensive damage to orange trees. What type of relationship is this?
Parasitism
The maximum amount of organisms an ecosystem can support is called the...
carrying capacity
Which of the following is most likely to cause the greatest decrease in the population of species B?
A.increase in species E
B.decrease in species C
C.decrease in species D
D.decrease in species A
B. decrease in species C
Ostriches and gazelles are two animals that live in Africa. They graze for food near each other because they help each other spot predators. The gazelle has excellent eyesight, but poor hearing, and the ostrich has excellent hearing, but poor eyesight. These two animals will alert one another when danger is near. What type of relationship is this?
Mutualism
How would a drought impact an ecosystem?
Answers may vary
Describe one way that energy from the sun might flow through the food web from a producer to the owl?
Answers may vary
Ex: The rabbit eats the plant and the owl eats the rabbit.
A tiny shrimp lives among the poisonous spines of a sea animal called the fire urchin. The spines provide the shrimp with protection from enemies. The fire urchin gains no benefit from the shrimp, but the shrimp causes it no harm. What type of relationship would this be?
Commensalism
Using only the relationships between the organisms shown in the diagram, what will happen to the number of N if most of the O are killed and why?
The number of N will decrease because there will be more M to eat the L, so fewer L will be available for the N to eat.