Charles Darwin observed an orchid flower with very long,thin tubes that prevent many species from feeding on flower nectar and pollinating the flower.He offered a prediction that some species of pollinator would eventually be found that can feed and pollinate through the small tube.You decide to test Charles Darwin's proposal by placing nets over some orchids that allow small pollinators to enter,but prevent the large sphinx moth from entering.You then compare the number of seeds produced by plants with and without the nets.The seed production is

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Quizplus · Accepted Answer

Seed production is the dependent variable in this experiment, as it is being measured and expected to change based on the manipulation of the pollinators allowed to access the flowers. The independent variable would be the type of pollinators allowed access to the flower. A theory is a well-supported explanation for a phenomena, so it is not applicable in this experiment. A standardized variable is one that is kept constant throughout the experiment, which is not relevant in this scenario. A hypothesis is a proposed explanation for a phenomena, which could have been used to formulate the experiment, but it is not the variable being measured.

Charles Darwin Observed an Orchid Flower with Very Long,thin Tubes