CORRECT WELL DETAILED ANSWERS|LATEST
UPDATE!!!!2025/2026|GUARANTEED
PASS|GRADED A+
Select the characteristics of a microbe. Choose all that apply.
a. too small to be seen with unaided eye
b. composed of cells
c. primary role is to cause illness
d. found almost everywhere - ANSWER a. too small to be seen with unaided eye
d. found almost everywhere
Did Pasteur's work support the theory of biogenesis or the theory of spontaneous
generation? - ANSWER Supported the theory of biogenesis because there was no
growth in flask meaning living cells must be present to generate microbes
You discovered a unicellular organism that lacks a nucleus. The cell wall of this organism was
found to contain peptidoglycan. To which domain does this organism belong to? -
ANSWER Domain Bacteria
Which of the following bacterial names is written correctly?
a. Staphylococcus Aureus
b. staphylococcus aureus
c. Staphylococcus aureus
d. Staphylococcus aureus - ANSWER C. Staphylococcus aureus
1
, This is correct because the name needs to be italicized and the first name needs to be
capitalized and the second name needs to be lowercase
A bacterial cell is measured to be 4000 nm (nanometers). Express this measurement in
micrometers (um). - ANSWER 4 um (micrometers)
4000 nm/1000 nm = 4 um
What is the total magnification with a 10x ocular lens when using the high-dry objective
(40x)? - ANSWER 400x
10x (40x) = 400x
Why is immersion oil necessary when using 100x objective (1000x total magnification), but
not when using the lower power objectives? - ANSWER The 100x objective lens is
smaller than the lower power objective lens
To achieve high magnification with goodgood resolution, the objective lens must be very
small. Immersion oil is used with this lens to prevent refracted light from being lost.
Because the refractive index of the oil and the glass slide are the same, the light is not
refracted and can enter the objective lens.
Why are viruses not included in the three domain system of classification? -
ANSWER Viruses are not alive and viruses do not have cells
The three domain system is based on the structure of the cell. Viruses, however, do not have
cells. They consist of genetic material (DNA or RNA) surrounded by a protein coat. Thus,
viruses can not be classified into a domain defined by cellular structure.
2
UPDATE!!!!2025/2026|GUARANTEED
PASS|GRADED A+
Select the characteristics of a microbe. Choose all that apply.
a. too small to be seen with unaided eye
b. composed of cells
c. primary role is to cause illness
d. found almost everywhere - ANSWER a. too small to be seen with unaided eye
d. found almost everywhere
Did Pasteur's work support the theory of biogenesis or the theory of spontaneous
generation? - ANSWER Supported the theory of biogenesis because there was no
growth in flask meaning living cells must be present to generate microbes
You discovered a unicellular organism that lacks a nucleus. The cell wall of this organism was
found to contain peptidoglycan. To which domain does this organism belong to? -
ANSWER Domain Bacteria
Which of the following bacterial names is written correctly?
a. Staphylococcus Aureus
b. staphylococcus aureus
c. Staphylococcus aureus
d. Staphylococcus aureus - ANSWER C. Staphylococcus aureus
1
, This is correct because the name needs to be italicized and the first name needs to be
capitalized and the second name needs to be lowercase
A bacterial cell is measured to be 4000 nm (nanometers). Express this measurement in
micrometers (um). - ANSWER 4 um (micrometers)
4000 nm/1000 nm = 4 um
What is the total magnification with a 10x ocular lens when using the high-dry objective
(40x)? - ANSWER 400x
10x (40x) = 400x
Why is immersion oil necessary when using 100x objective (1000x total magnification), but
not when using the lower power objectives? - ANSWER The 100x objective lens is
smaller than the lower power objective lens
To achieve high magnification with goodgood resolution, the objective lens must be very
small. Immersion oil is used with this lens to prevent refracted light from being lost.
Because the refractive index of the oil and the glass slide are the same, the light is not
refracted and can enter the objective lens.
Why are viruses not included in the three domain system of classification? -
ANSWER Viruses are not alive and viruses do not have cells
The three domain system is based on the structure of the cell. Viruses, however, do not have
cells. They consist of genetic material (DNA or RNA) surrounded by a protein coat. Thus,
viruses can not be classified into a domain defined by cellular structure.
2
