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
One of the central themes in biology is how DNA, RNA, and proteins are related. Describe how genetic information flows between t
Alborosie

Answer:

ycegiybioubn wybhfuilnero4vvwey y7vwetfbulwefb y8oh eoh 8oh o0 7 hyihbhybkrbkbewybweybeybeybecweybyleebwe guu hu yhuhbb  8hybdfbfbdgbbdg

Explanation:

6 0
3 years ago
brainscape: Restriction enzymes: A) act at the membrane to restrict the passage of certain molecules into the cell. B) are highl
PolarNik [594]

Answer:

C) are sequence-specific DNA endonucleases

B) degrade foreign DNA that enters a bacterium.

Explanation:

Restriction enzymes are the proteins that cut the DNA at a specific sequence.

<u>Restriction enzymes are also known as restriction endonuclease produced by bacteria that recognizes a specific sequence on DNA and split it by catalyzing the hydrolysis or addition of water molecule. </u>So, Restriction enzymes are sequence-specific DNA endonucleases.

The biological role of restriction enzymes is to restrict the entry of foreign DNA into the bacterium. <u>Restriction enzymes have the ability to restrict the number of bacteriophage strains that affect bacteria.</u>

Hence, the correct options are "C and B"

8 0
3 years ago
Plants are made up of _________________, _______________________, ________________________, ________________________, and ______
aksik [14]

Answer:

nucleus, chloroplasts, cell wall, cell membrane, mitochondria, cytoplasm and vacuole

Explanation:

I think this is right.

I hope this helps! :)

5 0
4 years ago
Read 2 more answers
Which trait distinguishes between the kingdoms of Bacteria and Archaea?
Arisa [49]

Answer:

I would say that the best answer is A.

Explanation:

Both Bacteria and Archaea, lack a nucleus and are unicellular. Most Archaea have a Cell wall, however there are a few exceptions, all Bacteria have a cell wall. Maybe the biggest difference between the two however, is where they thrive. Archaea live in extreme conditions, while bacteria don't. Due to this, I would say that the best answer is A, because this is the only question with a major difference in answers.

5 0
3 years ago
Read 2 more answers
Why does gees fly together in a V formation
Elina [12.6K]

Explanation: One of the highest probabilities is because of the bird in the front (the one in the point of the v) takes the command in leading to others in the flock to there location which explains for that as in there is no new members of there flock doing so.

Another reason could be is air resistances and helps the flock fly.

6 0
3 years ago
Other questions:
  • Why is the earth's gravity stronger than the moon's gravity? A:The moon is so far away from earth. B:The earth is more massive t
    9·2 answers
  • Which of the following is not a product or use of tropical rainforests?
    6·1 answer
  • Which organism would you most likely find in the most extreme habitats on earth?
    6·1 answer
  • 2. What is the purpose of the agarose gel?
    10·1 answer
  • which technique uses an enzyme to replicate dna regoins from a small sample of dna for use in dna finger printing
    14·1 answer
  • What cycles on earth does Solar radiation fuel?
    6·1 answer
  • How are national debt and deficit related?
    12·2 answers
  • The genetic code is the set of instructions that
    11·1 answer
  • Explain why the blue color of starch-iodine complex disappears upon heating?
    5·2 answers
  • Put the last 6 (Creep to Avalanche) in order from Fastest to Slowest.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!