A terrestrial food web is shown below.
Which of the following lists only organisms that are secondary consumers in this food web?
Which of the following molecules typically contains both nitrogen and phosphate?
The carbon cycle includes processes that release carbon into the atmosphere and places that act as carbon reservoirs. The diagram below shows both major processes that release carbon and major carbon reservoirs.
Which of these disruptions would cause an excess output in the carbon cycle?
The Nile River flows into the Mediterranean Sea. The Aswan High Dam contains the flow of water from the river and reduces the annual fall flooding. The floodwater is trapped behind the huge dam, allowing irrigation for agriculture. Sediments that would be washed away by the annual floods are also trapped behind the dam. The graph shows the water flow from the Nile that enters the Mediterranean Sea.
How has this dam most likely affected the Mediterranean Sea ecosystem?
A student is studying the ecology of a playa lake, which forms after a rainfall in a dry lake bed. The table lists the organisms that the student observed.
Which level of biological organization has the student described in the table?
The Texas blind salamander (Eurycea rathbuni) lives in the Edwards Aquifer region around San Marcos. Along with other species the salamander lives in total darkness in the underground crevices and caves of the aquifer region. The table lists some of the organisms that live in this environment and their food sources.
In an energy pyramid for these aquifer cave dwellers, which of the following would be placed at the bottom?
A student sets up a compost bin outdoors. Inside the bin microorganisms convert the student’s vegetable and paper scraps into rich fertilizer. Which of the following best describes the role that these microorganisms play in natural habitats?
The graph shows the basic changes in a forest community after a disturbance occurred.
The information shown in the graph suggests that the changes in the forest community were caused by —
A remora is a fish that has an adhesive disk on the back of its head that it uses to attach itself to a large shark. When food floats away from the shark’s mouth as it feeds, the remora collects the scraps. Drawings of a shark with a remora attached and a remora’s adhesive disk are shown below.
The relationship between the remora and the shark is an example of —
An estuary collects sediments from the ocean and rivers that feed into it. The sediments swirl around and then settle to form a mudflat. Eel grass is then established on the mudflat. The ecosystem changes over time and ultimately develops into a salt marsh that contains mangrove trees. Which of the following is likely NOT involved in this example of ecological succession?
This diagram demonstrates why the ocean is a large carbon sink.
An increase in the amount of carbon dioxide in the atmosphere can cause atmospheric temperatures to increase. Which statement explains how this could affect the ocean as a carbon sink?
The energy pyramid below shows the energy made available by producers.
Based on the energy flow between trophic levels in an energy pyramid, how much energy would be expected to be found at the secondary consumer level in this pyramid?
Roads are often built through forests for industrial purposes or as land is developed for residential and commercial needs. How would road construction through a forest most likely affect the ecosystem?
37 Four common relationships between organisms are listed in the box.
Which statements best describe these relationships?
Photosynthesis and cellular respiration both involve the use and release of gases. Which statement correctly identifies the role of gases in the two processes?
Which of the following gases is NOT considered a greenhouse gas?
What is a possible consequence of an enhanced greenhouse effect?
What is the greenhouse effect?
Examine the graph below
What is the dependent variable?
Examine the graph below
Examine the graph below
Examine the graph below
Examine the data table below.
How has atmospheric CO₂ changed from 1950 to 2020?
Examine the data table below.
What trend is shown by ocean surface pH between 1950 and 2020?
Examine the data table below.
What is the projected ocean surface pH for 2060?
Examine the data table below.
What happens to shell-building organisms as aragonite saturation decreases?
What role do zooxanthellae play in coral reefs?
What happens to corals when they lose their zooxanthellae?
How does ocean acidification contribute to coral bleaching?
What kind of organisms are found at the base of aquatic food chains?
Examine the data table below.
Which aquatic ecosystem has the highest biodiversity according to the table?
Examine the data table below.
What is the effect of salinity on the biodiversity level?
What is the primary cause of coral bleaching?
Coral bleaching occurs when corals expel which essential organism?
Which gases contribute most to the greenhouse effect on Earth?
Which human activities contribute to an increase in greenhouse gases?
The table below shows the percentage of coral reefs affected by bleaching events in different regions over the past decade. Based on the data, which region experienced the highest average percentage of coral bleaching events?
The graph below shows the sea surface temperatures (SST) in a coral reef ecosystem over the past decade.
Based on the graph, which conclusion about coral bleaching events is supported?
The relationship between coral and the essential organism, is an example of which symbiotic relationship?
In aquatic ecosystems, the photic zone is characterized by:
In the aphotic zone of the ocean, autotrophs obtain energy to produce sugars from
The graph below shows the trend of atmospheric carbon dioxide levels over the past century. Based on the graph, which statement about carbon dioxide levels is most accurate?
Using the graph below, what is the dependent variable?
