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
Maurinko [17]
3 years ago
15

A student set up an experiment to show that carbon dioxide is consumed by Elodea plants during photosynthesis. She filled two te

st tubes with distilled water and placed a piece of Elodea in one of the tubes. She added a drop of phenol red which is a pH indicator to both tubes. She blew in each tube to add carbon dioxide, which caused the distilled water to become more acidic. She exposed both tubes to the light and recorded any color changes in the liquid in the tubes. What is the negative control in this experiment
Biology
1 answer:
bixtya [17]3 years ago
8 0

Answer: The NEGATIVE CONTROl is the test tube that is filled with ONLY distilled water.

Explanation:

A negative control of an experiment is carried out alongside the main primary experiment except that the treatment is changed to something that is predicted to have no result. In the negative control, the student does not expect any response. This would help the student compare the result of a new experiment against an already known existing results.

Analysing the experiment carried out by the student, She filled two test tubes with distilled water and placed a piece of Elodea in one of the tubes, leaving the other without a plant. The other test tube that contains only distilled water is the negative control because she wasn't expecting any result from it. It's also served as a control sample to the primary experiment. This is observed as she blew in each tube to add carbon dioxide, which caused the distilled water to become more acidic. This would help the student know that the that experimental results are valid and to ensure that time is saved.

You might be interested in
All animals are A. autotrophs. B. biotrophs. C. heterotrophs. D. polytrophs.
masha68 [24]

Answer:

C. Heterotrophs

Explanation:

Heterotrophs cant make their own food. They cant make there own food so they eat animals and plats and all sorts of different things. Because of this heterotrophs are known as consumers. Anything that consumes/eats things are consumers.

4 0
3 years ago
Read 2 more answers
How is breathing related to cellular respiration
Minchanka [31]
When you breath in you breath in oxygen, which comes from plants, when you breath out, you breath out carbon dioxide, which is what plants breath.
7 0
3 years ago
Read 2 more answers
Which one of the following is the best definition of symbiosis?
Airida [17]
The appropriate answer is D !
7 0
3 years ago
Bacteria grow best in foods that are highly acidic true or false
Novay_Z [31]

Answer:

I think this is false. Bacteria grow best in an environment that is neutral or slightly acidic.

3 0
3 years ago
Summarize how earth atmosphere and surface receive energy
shusha [124]
Energy is transferred between the earth's surface and the atmosphere in a variety of ways, including radiation, conduction, and convection. The graphic below uses a campstove to summarize the various mechanisms of heat transfer. If you were standing next to the campstove, you would be warmed by the radiation emitted by the gas flame. A portion of the radiant energy generated by the gas flame is absorbed by the frying pan and the pot of water. By the process of conduction, this energy is transferred through the pot and pan. If you reached for the metal handle of the frying pan without using a potholder, you would burn your fingers! As the temperature of the water at the bottom of the pot increases, this layer of water moves upward and is replaced by cool water descending from above. Thus convection currents that redistribute the newly acquired energy throughout the pot are established
4 0
3 years ago
Other questions:
  • A 16-year-old girl has been admitted to the emergency department after ingesting 20 g of acetaminophen (tylenol) in a suicide at
    9·1 answer
  • In 2001, a small population of mice in Colorado had 150 births, 110 deaths, 12 immigrants to the population, and 2 emigrants fro
    14·1 answer
  • Why does epithelial tissue require a connective tissue?
    8·1 answer
  • How would cutting down trees affect the amount of evaporation in an area?
    14·1 answer
  • What will happen if one part of the system fails to carry out its fanction properly?
    12·2 answers
  • How is the air outside the cell different after photosynthesis than it was before?
    5·1 answer
  • A oceanic to continental convergence boundary would produce what type of volcano?
    6·1 answer
  • Summarize chargaff’s rule in a sentence or two
    14·1 answer
  • Penguins, which are birds, and seals, which are mammals, do not share a common ancestors, but both have flippers adapted for swi
    10·1 answer
  • Lab conclusion Mouse genetics one trait
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!