Karl describes an ecosystem that he visits frequently. The plant life in the ecosystem is mostly grass, about 3 feet tall. The grass is in a muddy area that floods each afternoon with a mix of freshwater and saltwater. There is a small river present.

Food webs in the rainforests of Asia contain thousands of species of animals and support many large, predatory animals. Others biomes, such as the taiga of Northern Europe, contain less than 100 animal species and have only a few large predators. Wha

What is the correct series of steps for the movement of energy in a food chain?

What is the first source of energy for all food webs?

Autotrophs are organisms that produce their own food. Which do scientists classify as autotrophs?

Which biome receives between 0 and 25 centimeters of precipitation each year, has a temperature range from –27° to 5° Celsius, has frozen soil, and is home to hares, caribou, and wolves?

Which of these describes a mutually beneficial relationship between two organisms?

What is the role of the Sun in a forest ecosystem?

Which of the following symbiotic relationships is considered parasitic?

Oxygen is released into the air by

What is the function of the cell membrane?

The cells of green plants are capable of producing relatively large amounts of oxygen and simple sugars. Which cell structure is necessary for most green plants to carry out these processes?

What pair of cell structures are found in plant cells, function in protecting the cell and making food, and are not found in animal cells?

What is the primary function of mitochondria in a cell?

Albert is studying food web relationships in wetland ecosystems. He learned that hawks feed on shrews and shrews feed on cattails. What is the original source of energy for wetland ecosystems?

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