The Cambrian Explosion Not Only Produced an Abundance of New

question 23

Multiple Choice

The Cambrian explosion not only produced an abundance of new animal species but also gave rise to the first shells,spines,and active swimmers.This suggests the important influence of ________ in driving animal evolution.

• A) photosynthetic organisms
• B) climate
• C) carnivorous predators
• D) filter-feeding organisms

---

Definitions:

Income Effect

How an individual's or an economic system's revenue shift affects the demand level for a particular good or service.

Substitution Effect

The economic principle that as the price of a good or service rises, consumers will replace it with cheaper alternatives, affecting the demand for goods.

Normal Good

A Normal Good is a type of good for which demand increases as the income of consumers increases and decreases when consumer income decreases, all else being equal.

Indifference Curve

A curve showing the different combinations of two products that yield the same satisfaction or utility to a consumer.