|
1.1 The study of life Read Online
Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.
Chapter 46: Ecosystems MCQ Multiple Choices Questions Quiz Test Bank
46.1 Ecology of Ecosystems
46.2 Energy Flow through Ecosystems
46.3 Biogeochemical Cycles
Question: The primary producers in an ocean grazing food web are usually ________.
Choices:
plants
animals
fungi
phytoplankton
Question: The weight of living organisms in an ecosystem at a particular point in time is called:
Choices:
energy
production
entropy
biomass
Question: Decomposers are associated with which class of food web?
Choices:
grazing
detrital
inverted
aquatic
Question: What law of chemistry determines how much energy can be transferred when it is converted from one form to another?
Choices:
the first law of thermodynamics
the second law of thermodynamics
the conservation of matter
the conservation of energy
Question: A re-created ecosystem in a laboratory environment is known as a ________.
Choices:
mesocosm
simulation
microcosm
reproduction
Question: Organisms that can make their own food using inorganic molecules are called:
Choices:
autotrophs
heterotrophs
photoautotrophs
chemoautotrophs
Question: In the English Channel ecosystem, the number of primary producers is smaller than the number of primary consumers because________.
Choices:
the apex consumers have a low turnover rate
the primary producers have a low turnover rate
the primary producers have a high turnover rate
the primary consumers have a high turnover rate
Question: The position of an organism along a food chain is known as its ________.
Choices:
locus
location
trophic level
microcosm
Question: Which term describes the process whereby toxic substances increase along trophic levels of an ecosystem?
Choices:
biomassification
biomagnification
bioentropy
heterotrophy
Question: The ability of an ecosystem to return to its equilibrium state after an environmental disturbance is called ________.
Choices:
resistance
restoration
reformation
resilience
Question: What term describes the use of mathematical equations in the modeling of linear aspects of ecosystems?
Choices:
analytical modeling
simulation modeling
conceptual modeling
individual-based modeling