Use the information and data table below to answer the question. A student performed an investigation on green single-celled organisms called Euglena. Two samples of Euglena were placed in two different containers of water taken from the same source. One sample of Euglena was kept in a dark area. The other sample of Euglena was kept in a lighted area. The student recorded the observations in the table below.What is the primary source of energy used by Euglena in Sample 2?

These 400+ 5th Grade science questions have been taken from the following state and regional science exams in the United States: AIMS-Arizona's Instrument to Measure Standards, Alaska Department of Education & Early Development, California Standards Test, MCAS-Massachusetts Comprehensive Assessment System, Maryland School Assessment, MEA-Maine Educational Assessment, MEAP-Michigan Educational Assessment Program, NAEP-National Assessment of Educational Progress, North Carolina End-of-Grade Assessment, New York State Educational Department Regents exams, Ohio Achievement Tests, TAKS-Texas... Show more

These 400+ 5th Grade science questions have been taken from the following state and regional science exams in the United States:
AIMS-Arizona's Instrument to Measure Standards, Alaska Department of Education & Early Development, California Standards Test, MCAS-Massachusetts Comprehensive Assessment System, Maryland School Assessment, MEA-Maine Educational Assessment, MEAP-Michigan Educational Assessment Program, NAEP-National Assessment of Educational Progress, North Carolina End-of-Grade Assessment, New York State Educational Department Regents exams, Ohio Achievement Tests, TAKS-Texas Assessment of Knowledge and Skills, Virginia Standards of Learning, & Washington MSP.
 

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