Every year one hundred trees remove approximately _______ from the atmosphere.
What percent of the trees cut down are used for something other than paper?
Arboreal animals are animals that _______.
How do trees improve water quality?
Which of the following statements about human impact on trees is true?
Explain how trees help maintain air quality.
Trees absorb carbon dioxide and release oxygen through photosynthesis. Their leaves also trap dust, pollen, and airborne pollutants, helping to clean the air.
Approximately how many plant made pharmaceuticals are currently under different stages of discovery?
Which of the following statements about human impact on trees is true?
Explain how biopharmaceuticals can be created using plants.
Scientists can insert genes into plants so that the plants produce useful medical compounds such as vaccines or proteins used in drugs; these compounds can then be extracted from the plant material.
How has human use of trees had both a positive and negative impact?
Human use of trees provides resources such as wood for building and paper, and supports economies, but has also caused deforestation, loss of habitats, and increased carbon dioxide levels.
Arboreal animals are animals that _______.
Compare the relationship of trees with other plants and with insects.
Trees compete with other plants for sunlight, water, and nutrients. In contrast, many insects depend on trees for food and shelter, while some insects pollinate trees or help control pests, creating mutualistic relationships.
How do trees improve water quality?
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