収録問題のプレビュー

Many plants depend on animals to disperse their seeds. Birds, for example, consume fruits and later deposit seeds far from the parent tree. This movement can reduce competition for light and nutrients among young plants. It may also allow a species to colonize a new habitat. However, seed dispersal is not always beneficial. A seed deposited in a dry or heavily shaded location may fail to germinate. Researchers therefore distinguish dispersal distance from dispersal effectiveness: traveling farther does not necessarily improv

What distinction do researchers make in the passage?

• A. Dispersal distance versus effectiveness
• B. Animal size versus body weight
• C. Plant height versus fruit sweetness
• D. Forest age versus tree density