Bio 198 Exam 2 Practice Questions and Correct Answers

The process of ____________ makes energy available to most terrestrial ecosystems, and ________________ are doing this process. A) sun; plants B) photosynthesis; autotrophic organisms C) eutrophication; autotrophic organisms D) photosynthesis; heterotrophic organisms E) eutrophication; fungi B) photosynthesis; autotrophic organisms An ecosystem can be defined as A) all of the organisms regardless of species living in a defined area. B) all of the organisms of a single species living in a defined area. C) all of the Bison living on the Konza Prairie. D) all of the organisms living in a defined area and the abiotic components of that area. E) all of the humans living in Manhattan. D) all of the organisms living in a defined area and the abiotic components of that area. ____________ states that "energy cannot be created nor destroyed" and this means that a(n) ____________ needs a source of energy in order to function properly. A) First Law of Thermodynamics; molecule B) Second Law of Thermodynamics; cell C) First Law of Thermodynamics; ecosystem D) Gravity; universe E) Ecological theory; ecosystem C) First Law of Thermodynamics; ecosystem If there is an ______________ flowing through an ecosystem, there is a corresponding ___________ cycling within the ecosystem. A) increase in photosynthesis; decrease in cellular respiration B) increase in energy; decrease in energy C) increase in nutrients; increase in energy D) autotrophic organism; heterotrophic organism E) increase in energy; increase in nutrients E) increase in energy; increase in nutrients _________________ are an important component of the ecosystem and have a key role in moving nutrients from the biotic to the abiotic reservoirs of the ecosystem. A) Decomposers B) Photoautotrophs C) Autotrophs D) Producers E) Nitrogen fixers A) Decomposers