Food Webs & Roles
Effects on Populations
Past Science
Relationships in Ecosystems
100
In order to figure out the roles that organisms play in a food web, which role do you have to identify first?
Producers
100
What term is used to describe an area on Earth that has lost almost all life; the area becomes bare and erosion easily moves the exposed dirt around.
desertification
100
Which organelles in plant cells, some bacterial cells, and some protist cells allow for the organism to capture light energy and store it as chemical energy in sugar?
Chloroplast
100
What are the three "-isms" of symbiosis?
parasitism, mutualism, commensalism
200
This zombie appears to be missing large chunks of muscle and skin. What food web role is responsible for breaking down this dead material?
Decomposers
200
Which food web role is most essential to an ecosystem? (Without it, other organisms would starve.)
Producers
200
What organelle found in most eukaryotic cells allows organisms to release the chemical energy found in sugar? This organelle becomes the "power house" of the cell.
Mitochondria
200
Regardless of the type of ecosystem relationship, one of the two species always ___________ from the relationship.
benefits
300
What type of consumer is three energy arrows away from a producer?
Tertiary consumer.
300
What's one change that would happen to this ecosystem's populations if most of the snakes were to die from disease?
1. The owl's population would get smaller (without as much food to eat).
2. The frog's population would get bigger (without as many predators.)
300
Sound waves move fastest in which state of matter?
Solid
300
What relationship occurs between two organisms that help each other out?
mutualism
400
What is terribly wrong with this food web?
Arrows are backwards.
400
Which two species would see a drop in numbers if a virus killed off many of the grasshoppers?
Robins (bird) and the mice.
400
What landform is built at the subduction zone (a kind of convergent boundary) between the Pacific Ocean and South America?
Volcano
400
Mistletoe, known for being a place to kiss below in the winter, is a plant that grows on host trees. The mistletoe sends its roots into the host tree and steals nutrients, food, and water from it. What type of relationship does mistletoe have with other trees?
parasitism
500
Identify 5 Secondary Consumers
Human, Trout, Salamander, Bald Eagle, Frog
500
Based on the graph below, what likely caused the wolf population to decline?
A drop in deer population (wolves eat deer for food).
500
What classification would be given to an organism that has the following characteristics:
heterotroph
single-celled
eukaryote
protist
500
Follicle mites grow inside the hair follicles and oil glands of your face. About 50% of you will end up having them in your lifetime. That being said, the follicle mice use your skin for a place to live and eat the waste oil that you produce. Humans, in turn, are usually unaffected by this relationship. Which of the following relationships is most similar to that of the mites and humans?
Mosquitoes bite humans and suck their blood.
Ants defend acacia trees from predators, while the trees provide sugar for the ants.
A tiny remora attaches itself to a sea turtle for a free ride.
A lion hunts a gazelle, kills it, and eats it.
The remora and the sea turtle. (the remora benefits, and the sea turtle is unaffected. Both the humans & mites AND the remora & sea turtle are commensalism relationships.)