Rotifers would be considered __________ feeders
a. bulk
b. filter
c. liquid
d. predatory
B
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Isotopes of the same element differ from each other in the number of ____
a. electrons and protons b. neutrons only c. protons and neutrons d. electrons only e. protons, neutrons, and electrons
When plants colonized land, they dramatically changed conditions on Earth by altering the global ____ cycle
a. carbon b. hydrologic c. nitrogen d. phosphorus e. sulfur
Environmentalism is ________.
A. the study of ecosystems B. a philosophical and social movement concerned with preserving the environment C. the study of how energy flows through an ecosystem D. the same discipline as ecology
What might be a result of hunting sea otters to extinction for their fur?
A) loss of killer whales B) loss of sea urchins C) loss of kelp beds D) loss of barnacles