Biology 1st Quarter 2012 1 - 10: Question Preview (ID: 10373)


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The total magnification of a light microscope with an eyepiece magnification of 10X and an objective lens set on 40X is -
a) 50X b) 400X c) 410X d) 4000X
Why do students place cover slips over slides ?
a) prevent the formation of air bubbles b) prevent the organism from moving c) increase the magnification d) prevent the slide from breaking
Which unit represents a measure of liquid volume?
a) Milliliter b) Gram c) Gram/cm³ d) Millimeter
A belief based upon prior knowledge or experience is a/an -
a) observation b) inference c) wild guess d) prediction
A student wants to determinme if sugar substitutes will have an effect on the fermentation process when making bread. What's the dependent variable in such an experiment?
a) time it takes to perform the experiment b) height of the bread c) type of sugar used d) temperature of the oven
Tables, diagrams, and graphs are used by scientists primarily to -
a) recognize the dependent variables. b) organize and manage data. c) test the hypothesis. d) design a research plan for an experiment.
Which of the following is always graphed on the y (vertical) axis?
a) the controlled variable b) independent variable c) dependent variable d) numbers
Which is organelle of the cell stores DNA
a) cytoplasm b) vacuoles c) nucleous d)
Jenny put four squares of paper towel and soaked each in different soap. She wanted to see the effectiveness of antibacterial soap. What can she do to improve her experiment?
a) use larger petri dishes b) use the same size squares of paper towl for each of the different soaps c) use only one type of soap d) decrease the time the paper towl was allowed to sit in the soap and bacteria.
What is the best way to justify a hypothesis?
a) use scientific literature b) repeated trials c) write a research proposal d) by choosing the correct experimental methodology
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