4/9/22, 2:30 PM Graded Exam 1
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BIO250_Saylor_V5 | Unit 3: Tools of the Laboratory
Started on Sunday, March 6, 2022, 3:45 PM
State Finished
Completed on Sunday, March 6, 2022, 4:04 PM
Time taken 18 mins 43 secs
Grade 81.00 out of 90.00 (90%)
Feedback You’re off to a good start. A course grade of 70% is required to request a
transcript. You’ve met that for the first exam already, but if you want to reattempt
for a higher grade you can retake this assessment. Study hard for each exam,
and consider using tutoring anytime you get stuck. Remember that 10 hours of
tutoring are provided to you through your StraighterLine membership.
Question 1
Agar is a complex polysaccharide that comes from a/an ______.
Correct
4.50 points out Select one:
of 4.50 a. green plant
b. fungus
c. bacterium
d. algae
e. marine invertebrate
This study source was downloaded by 100000836546216 from CourseHero.com on 04-26-2022 13:29:50 GMT -05:00
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, 4/9/22, 2:30 PM Graded Exam 1
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Question 2 Which type of microscope does not use light in forming the specimen image?
Correct
4.50 points out Select one:
of 4.50 a. Bright-field
b. Dark-field
c. Phase-contrast
d. Fluorescence
e. Electron
Question 3
A nutrient medium that contains at least one ingredient that is not chemically
Correct defined is termed ______.
4.50 points out
of 4.50 Select one:
a. complex
b. reducing
c. enriched
d. synthetic
Question 4 NASA has published a list of criteria for identifying fossil bacteria in samples from
Correct Mars, as part of a search for evidence of life. Which of the following is good
4.50 points out
evidence for the presence of bacterial cells?
of 4.50
Select one:
a. Cell size of 0.5 to 2 microns
b. Three-dimensional organization of cells in a starburst pattern
c. Absence of carbon in the material
d. No evidence of water in the surrounding mineral
This study source was downloaded by 100000836546216 from CourseHero.com on 04-26-2022 13:29:50 GMT -05:00
https://moodle.straighterline.com/mod/quiz/review.php?attempt=4374603 2/9
https://www.coursehero.com/file/143991873/Graded-Exam-1pdf/
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BIO250_Saylor_V5 | Unit 3: Tools of the Laboratory
Started on Sunday, March 6, 2022, 3:45 PM
State Finished
Completed on Sunday, March 6, 2022, 4:04 PM
Time taken 18 mins 43 secs
Grade 81.00 out of 90.00 (90%)
Feedback You’re off to a good start. A course grade of 70% is required to request a
transcript. You’ve met that for the first exam already, but if you want to reattempt
for a higher grade you can retake this assessment. Study hard for each exam,
and consider using tutoring anytime you get stuck. Remember that 10 hours of
tutoring are provided to you through your StraighterLine membership.
Question 1
Agar is a complex polysaccharide that comes from a/an ______.
Correct
4.50 points out Select one:
of 4.50 a. green plant
b. fungus
c. bacterium
d. algae
e. marine invertebrate
This study source was downloaded by 100000836546216 from CourseHero.com on 04-26-2022 13:29:50 GMT -05:00
https://moodle.straighterline.com/mod/quiz/review.php?attempt=4374603 1/9
https://www.coursehero.com/file/143991873/Graded-Exam-1pdf/
, 4/9/22, 2:30 PM Graded Exam 1
0
My Account
Question 2 Which type of microscope does not use light in forming the specimen image?
Correct
4.50 points out Select one:
of 4.50 a. Bright-field
b. Dark-field
c. Phase-contrast
d. Fluorescence
e. Electron
Question 3
A nutrient medium that contains at least one ingredient that is not chemically
Correct defined is termed ______.
4.50 points out
of 4.50 Select one:
a. complex
b. reducing
c. enriched
d. synthetic
Question 4 NASA has published a list of criteria for identifying fossil bacteria in samples from
Correct Mars, as part of a search for evidence of life. Which of the following is good
4.50 points out
evidence for the presence of bacterial cells?
of 4.50
Select one:
a. Cell size of 0.5 to 2 microns
b. Three-dimensional organization of cells in a starburst pattern
c. Absence of carbon in the material
d. No evidence of water in the surrounding mineral
This study source was downloaded by 100000836546216 from CourseHero.com on 04-26-2022 13:29:50 GMT -05:00
https://moodle.straighterline.com/mod/quiz/review.php?attempt=4374603 2/9
https://www.coursehero.com/file/143991873/Graded-Exam-1pdf/
