Exam 3: Energy Flows and Ecosystems

The kingdom characterized by a lack of a cell nucleus is called ________.

Explain the implications of a meat-based diet compared to a vegetarian diet in terms of trophic energy efficiency.

The competitive exclusion principle tells us that many species can occupy the same niche, at the same time, in the same area.

The ocean's most productive zone is the ________.

________ is/are NOT an abiotic ecosystem component.

________ has same trophic level as an Arctic flower.

A species may act as a keystone species in some communities but not in others.

Life in Earth's oceans originated ________ years ago and came onto land ________ years ago.

About ________ of the sun's incoming energy is reflected back into space.

As energy disperses, entropy increases.

Starting with energy emitted from the sun, explain how energy flows through land-based, ecological systems.

Explain why tropical forests have such high levels of biodiversity.

A species' niche is ________.

The competitive exclusion principle tells us that ________.

Biome distribution is principally determined by ________.

________ is/are NOT an auxiliary energy flow.

Organisms that require access to oxygen to survive are known as ________.

As energy flows through ecosystems, entropy ________.

How do food webs differ from food chains?

Water availability is often the critical factor determining differences between terrestrial communities.