BIO 108 LAB MIDTERM EXAM
QUESTIONS AND ANSWERS GRADED A+
2026
A statement of the expected results of an experiment based on the hypothesis is the
____________________. - ANS prediction
A hypothesis must me testable and ___________________. - ANS falsifiable
Based on the evidence, stomach ulcers are most likely caused by _________________. -
ANS bacteria
Scientists investigating the effects of a range of temperatures on the occurrence of allergens in
urban environments measured the number of days that ragweed pollen was present in
downtown Kansas City lots and in the nearby rural fields in early spring and late summer
months.
What is the independent variable, dependent variable and the control group? -
ANS independent variable: range of temperatures (spring/summer)
dependent variable: number of days pollen was present
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
1
, control group: where pollen was present
Reminder: be able to suggest a control group to a given scenario for an experiment.
Answer *ok* to this question - ANS ok
Compound light microscopes have ____________________. - ANS at least two lenses
Switching from a low power to a high power lens on your microscope will allow you to see
____________________. - ANS a few cells at once
The dissolving agent in a solution is called the ____________. - ANS solvent
Osmosis is the movement of water from a ___________ water concentration to a __________
water concentration. - ANS high; low
Animals get both their energy and carbon from organic compounds. Therefore, animals are
____________________. - ANS chemo-heterotrophs
For a compound microscope, what is the total magnification if you are using the 4X objective? -
ANS 40X
For a compound microscope, if you move a specimen to the left, then the image will move
____________________. - ANS to the right
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
2
QUESTIONS AND ANSWERS GRADED A+
2026
A statement of the expected results of an experiment based on the hypothesis is the
____________________. - ANS prediction
A hypothesis must me testable and ___________________. - ANS falsifiable
Based on the evidence, stomach ulcers are most likely caused by _________________. -
ANS bacteria
Scientists investigating the effects of a range of temperatures on the occurrence of allergens in
urban environments measured the number of days that ragweed pollen was present in
downtown Kansas City lots and in the nearby rural fields in early spring and late summer
months.
What is the independent variable, dependent variable and the control group? -
ANS independent variable: range of temperatures (spring/summer)
dependent variable: number of days pollen was present
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
1
, control group: where pollen was present
Reminder: be able to suggest a control group to a given scenario for an experiment.
Answer *ok* to this question - ANS ok
Compound light microscopes have ____________________. - ANS at least two lenses
Switching from a low power to a high power lens on your microscope will allow you to see
____________________. - ANS a few cells at once
The dissolving agent in a solution is called the ____________. - ANS solvent
Osmosis is the movement of water from a ___________ water concentration to a __________
water concentration. - ANS high; low
Animals get both their energy and carbon from organic compounds. Therefore, animals are
____________________. - ANS chemo-heterotrophs
For a compound microscope, what is the total magnification if you are using the 4X objective? -
ANS 40X
For a compound microscope, if you move a specimen to the left, then the image will move
____________________. - ANS to the right
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
2
