1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mandarinka [93]
3 years ago
15

A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and

distilled water. While the four disks were soaking in their respective solutions, she streaked a sterile nutrient agar dish with a culture of E. coli bacteria. Then, she placed each disk carefully onto the nutrient agar dish, placed the lid on the dish, taped it shut, and incubated the dish at 37°C for several days. The diagram shows how the nutrient agar dish looked on Day 1 and Day 4. The shaded portion of the plate on day 4 indicates the bacterial growth. What is the control in the experiment?<br />
a. Disk soaked in disinfectant 1<br />
b. Disk soaked in disinfectant 3<br />
c. Disk soaked in disinfectant 2<br />
d. Disk soaked in distilled water
Biology
1 answer:
andrey2020 [161]3 years ago
7 0
Correct me if i get this wrong but im gonna go  with letter D it just feels right!
You might be interested in
What type of electrical energy is used in homes and businesses in California and is produced from the heat energy of magma close
azamat

Answer:

The type of energy your looking for is geothermal energy.

Explanation:

Geothermal energy is energy that comes from deep within the earth, From such things as magma or heat. In California at the Geysers there is a Dry Steam Power Station which uses geothermal energy in order to make energy. The way that works is Steam rises to a turbine which spins a generator that produces energy.

7 0
3 years ago
Read 2 more answers
Which of the following statements provides an example of responsiveness?​
vovikov84 [41]
I was wondering too??
7 0
3 years ago
Human activities can disturb natural ecosystems which is a human activity that can change local ecosystems
Bad White [126]

Answer:

There are many way's we change local ecosystems one way is urbanization.

Explanation:

If the human race keeps building on more land ecosystems will die out and animals will become extinct.

8 0
3 years ago
__________ refers to the breadth and depth of material covered.
Tanzania [10]
The answer is called Scope. Hope this helps.
3 0
3 years ago
What happens when u have too many yellow blood cells
zmey [24]

Answer:

Explanation:

The increased number of red blood cells, white blood cells, or platelets in the blood can cause bleeding problems and make clots form in blood vessels. This can increase the risk of stroke or heart attack.

5 0
3 years ago
Other questions:
  • What determines the similarities in anatomical or physical features among organisms
    11·2 answers
  • The skin condition caused by hyposecretion of the oil glands and is an inherited condition is known as
    5·1 answer
  • People plz help me!! I’ll give u brainiliest
    7·1 answer
  • A living cell is placed into a hypotonic solution . Compare the solute and solvent concentration inside the cell with the concen
    10·1 answer
  • Bicuspid valve prevents backflow into
    8·1 answer
  • The amount of inertia an object has depends on its blank
    11·2 answers
  • I will make you brain list pls help!! 14 points
    13·1 answer
  • Choose four wordsdescribing growing food
    11·1 answer
  • What happens during aerobic respiration? A Oxygen is produced. B Glucose is produced. с Lactic acid and oxygen are produced. D A
    10·1 answer
  • Which problem does the Montreal Protocol attempt to remedy?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!