Unit Test — Unit test Answers
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Examine the diagram of a cell.
A
chloroplastB
mitochondrionC
nucleusD
ribosome22
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Which is a component of cell theory?
A
Cells come from bacteria.B
Cells come from cells.C
Cells come from nonliving matter.D
Cells come from non-cells.23
When scientists first started mapping human genes, they estimated that there were about 2 million genes. By the late 1990s, it was thought that there were only 100,000 genes, and then that number shrank to 19,000 in 2001. Most scientists now believe that humans have about 21,000 genes.Which statement describes these estimates?
A
They became more accurate over time.B
They became less accurate over time.C
They were more accurate and then less accurate.D
The accuracy remained the same.24
During which stage of a scientific investigation is it most useful to organize information in graphs and tables?
A
research related informationB
identify a problem or needC
analyze the resultsD
design an investigation25
Which shows the correct order of stages of technological design?
A
design a solution, identify a problem, evaluate the solution, implement the solutionB
design a solution, implement the solution, evaluate the solution, identify a problemC
identify a problem, design a solution, implement the solution, evaluate the solutionD
identify a problem, evaluate the solution, design a solution, implement the solutionDid you find these answers helpful?
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