You Want to Test Charles Darwin's Prediction That an Orchid

question 18

Multiple Choice

You want to test Charles Darwin's prediction that an orchid with long pollen tubes has a pollinator with long,thin mouthparts that can reach the bottom of the elongated nectar tube.You place nets over some orchids,which allows pollinators with small,short mouthparts to enter but prevents the entry of pollinators with long,thin mouthparts.Next,you compare the number of seeds produced by plants with and without the nets.In this experiment,seed production is a(n)  

• A) dependent variable.
• B) hypothesis.
• C) theory.
• D) independent variable.
• E) standardized variable.

---

Definitions:

Nonexcludable

Nonexcludable goods are those that cannot feasibly or reasonably be kept from individuals who do not pay for them, one of the characteristics of public goods.

Nonrival

A characteristic of a good whereby one person's consumption does not prevent or decrease the ability of others to enjoy it as well.

Private Good

A product or service that is consumed by a single individual or household and cannot be used or consumed by others simultaneously.

Pizza

A popular Italian dish consisting of a usually round, flat base of leavened wheat-based dough topped with tomatoes, cheese, and often various other ingredients, which is then baked at a high temperature.