Glencoe Biology Chapter 3 Exam

Front

What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species, genetic diversity, and ecosystem diversity.

Front

What is the profundal zone?

Back

The profundal zone is a deep-water area in a large lake where light does not penetrate, and it is typically inhabited by organisms such as crayfish.

Front

What is the photic zone?

Back

The photic zone is the upper layer of a marine ecosystem where sunlight penetrates, allowing photosynthesis to occur.

Front

What distinguishes temperate grassland from tropical savanna?

Back

The main abiotic distinction is temperature; temperate grasslands have cooler temperatures, while tropical savannas are warmer.

Front

Why are lichens considered pioneer species?

Back

Lichens are considered pioneer species because they can survive in harsh conditions and secrete acids that help break down rock, facilitating soil formation.

Front

What is an abiotic factor?

Back

Abiotic factors are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.

Front

Define the benthic zone.

Back

The benthic zone is the lowest ecological zone in a body of water, consisting of the sediment surface and sub-surface layers.

Front

What role do plankton play in aquatic ecosystems?

Back

Plankton are crucial as they form the base of the aquatic food web, serving as primary producers and food for larger organisms.

Front

What is the significance of photosynthesis in the photic zone?

Back

Photosynthesis in the photic zone is significant because it produces oxygen and organic matter, supporting the entire aquatic food web.

Front

What are the characteristics of the abyssal zone?

Back

The abyssal zone is characterized by extreme depths, high pressure, low temperatures, and lack of light, making it inhospitable for most life forms.