How does energy flow through different organisms?
It starts with sunlight, which gives plants radiant energy to make glucose. Then stored chemical energy within plants provide animals with energy to function in their daily lives.
Complete this statement: Energy ___________ through an ecosystem, whereas nutrients are ____________.
flows, recycled
When an ecosystem is said to have great biodiversity, it means:
the variety of organisms in an ecosystem.
Which situation will most likely cause the sustainability of an ecosystem to weaken?
A disease wipes out several plant species.
Which 2 organisms from the food web above could be classified as a predator?
Sea Turtle and Jellyfish
Which organism from the food web above is a primary consumer?
Crustaceans
If two species were to occupy the same niche, what would happen?
They would compete with one another for the same food and other resources in the environment. Eventually, one species would be likely to outcompete and replace the other.
What best describes a similarity between photosynthesis and the changes in energy represented by the diagram?
During photosynthesis, a plant’s leaves change solar energy into chemical energy, and then the chemical energy is used for the plant’s life functions
Which proposed solution would have the GREATEST impact on regaining the balance between producers and consumers in water-based ecosystems?
limiting the use of fertilizers used to grow food on farms
What best explains why decomposers are an important part of this food web?
They make nutrients available to plants.
What best explains the difference in the amount of available energy in the trophic levels of a desert ecosystem?
There is less available energy in the fourth trophic level because of the loss of energy through metabolism in each of the lower trophic levels.
What is a possible effect of rising temperatures in coastal cities?
Warmer temperatures will may change climates, and rising water from melting glaciers may flood coastal cities.
A series of chemical reactions that convert light energy, water, and carbon dioxide into glucose (food/energy) and give off oxygen is called what?
Photosynthesis
Humans have influenced Earth’s surface and atmosphere through their actions over a long period of time. What human activity currently has most affected Earth’s atmosphere?
burning fossil fuels
The algae capture sunlight and perform photosynthesis, providing oxygen and other nutrients to the coral polyp that aid in its survival. In turn, the algae is provided with the carbon dioxide expelled by the polyp that it needs to undergo photosynthesis.
What type of relationship is this?
mutualistic
What are 3 examples of a limiting factor?
food
space
weather conditions
Which describes energy through the food web below?
Snakes get energy from salamanders and mice.
Which group of organisms obtains energy for life processes by converting sunlight into chemical energy?
Producers
Which piece of data from the graph supports the conclusion that human interaction with insects decreases the population of insects?
A significantly smaller number of insects live in the human created habitats of a yard and a parking lot compared to the natural forest habitat.
What are three explanations for the change in the pheasant population between Point B and Point C?
increased birth rate of its predators
lack of food for the pheasants
lack of nesting space for the pheasants
What are the 2 products of photosynthesis?
Oxygen and Glucose
If wolves were eliminated from this ecosystem, how will the population of plants be indirectly affected?
The population of plants will be reduced because of the overgrazing of plants by elk. Overgrazing occurred because the elk population was no longer controlled or checked by the wolves (their predator).
What is an organism that a parasite lives with, in, or on, and provides a source of energy or a suitable environment for the parasite to live?
host
What are 3 threats to biodiversity.
Habitat Loss
Invasive species introduction
Overconsumption
What is a nonliving part of an organism’s habitat?
abiotic factor
Much of the greenhouse gases come from____________________ , and the amount of greenhouse gases contributed by humans is the________________ .
Burning Fossil Fuels, Carbon Footprint
What is the difference between the air inside and the air outside of a greenhouse, and why?
The air inside the greenhouse is warmer than the outside air because of the trapped solar energy inside.
What do plants do for ecosystems besides act as producers? Give 3 examples.
They are a source for oxygen
Remove greenhouse gas from the air
Provide a habitat for many animals
What is needed for cellular respiration to occur?
Oxygen and Glucose
In a Louisiana forest food web, an oak tree is a________.
producer
What is a type of symbiosis in which both species benefit from living together?
mutualism
A biosphere is the sum of all the __________ established on planet Earth.
ecosystems
Vultures, which feed on the bodies of dead organisms, are
scavengers
Why are producers important in an ecosystem?
They are the beginning of the food chain, and bring energy into the ecosystem through photosynthesis.
What human activity currently has most affected Earth’s atmosphere?
Burning Fossil Fuels
How do the flowers benefit from the bees?
The bees pollinate from flower to flower.
Why is glucose important?
It is a sugar that acts as the food source for plants, which can then be converted to energy in cellular respiration.
People make clothing using fibers that come from natural materials and from synthetic materials. How do these materials differ from one another?
Natural fibers are fibers produced from materials made by plants or animals, while synthetic fibers are produced from a series of chemical changes to a natural resource.
What is the difference between abiotic and biotic factors in an ecosystem?
Biotic factors are living and abiotic factors are nonliving. Most abiotic factors can survive without biotic factors
What is the largest population that a particular environment can support?
carrying capacity
In the food web below, the hawk would be considered a:
2nd level Consumer(Secondary Consumer)
Organisms in the same ecosystem will compete for limited food. If there is a reduction in egg-cloud availability in the reef ecosystem, which organism’s access to food would be least affected?
Phytoplankton because they are producers and create their own energy from sunlight and do not depend on the availability of the egg cloud for their food.
Most disposable diapers use a chemical called Sodium Polyacrylate. The chemical is a polymer and it helps diapers stay dry longer. What is the correct order of materials to make a diaper?
crude oil --> polymer --> diaper
What conclusion can you make from this graph about the type of habitat most insects are successful in?
Most of the insect types live in the successional forest, so I can conclude that insects are most successful in the forest.
How do photosynthesis and cellular respiration work together?
Photosynthesis creates the glucose and oxygen that cellular respiration needs to make energy. Cellular respiration creates the carbon dioxide and water that photosynthesis needs.
What is the largest population that a particular environment can support?
carrying capacity
What best explains the energy in trophic levels in this energy pyramid?
Only about 10% of the energy available at one trophic level is transferred to the next trophic level.
Certain gases in the atmosphere - water vapor, carbon dioxide, methane- help to maintain the Earth's temperatures and climate. These are called ____
Greenhouse gases
What would happen on Earth if there were no greenhouse gases in the atmosphere?
The atmosphere would cool and would not support life.