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
Pachacha [2.7K]
3 years ago
13

A group of biology students tests the growth of bacteria under different conditions. The students apply the same amount of bacte

ria to identical Petri dishes enriched with nutrients, then place each plate at a different temperature. The bacteria are allowed to grow for three days, after which the number of bacterial colonies on each plate is counted. What is the dependent variable in this experiment?
A.
the time of day that the experiment is performed
B.
the number of bacterial colonies after three days
C.
the temperature at which the colonies grew
D.
the nutrient type present in the Petri dishes
Biology
2 answers:
mylen [45]3 years ago
7 0

Answer:

Answer: B. The number of bacterial colonies that grew

Explanation: The number of bacterial colonies that grew depend on the temperature, nutrients, and time of day.

Explanation:

bija089 [108]3 years ago
6 0

Answer:

B. the number of bacterial colonies after three days

Explanation:

As you may already know, a scientific experiment is composed of dependent and independent variables, being necessary that you know how to recognize each one of them.

In summary, an independent variable is one that influences a situation to happen, it influences another variable and it is not necessary to suffer any influence to cause a result. The dependent variable, on the other hand, is influenced by the independent variable and needs that influence to demonstrate a result.

As we saw in the experiment above, the students applied the same amount of bacteria to identical Petri dishes enriched with nutrients and put each plate at a different temperature. This temperature will influence the growth of bacteria for three days. Thus, we can conclude that temperature is the independent variable, while the growth of bacterial colonies is the dependent variable.

You might be interested in
Evidence that supports the prokaryotic origins of mitochondria and chloroplasts are all of the following except __________.
hodyreva [135]

Your question was incomplete (please check below the full content). The evidence that supports the prokaryotic origins of mitochondria and chloroplasts do not include multiple DNA copies associated with inner membranes.

<h3>What is organellar DNA?</h3>

The organellar DNA is the genome contained within mitochondria and chloroplasts, which is independent of nuclear eukaryotic DNA.

The organellar DNA contains multiple DNA molecules, which are found in association with the inner membrane, ant is not found in prokaryotic life forms.

The complete question in this case is: "Evidence that supports the prokaryotic origins of mitochondria and chloroplasts are the presence of mitochondria, a eukaryote engulfing prokaryotic photosynthetic cells, and non-photosynthetic eukaryotes, EXCEPT."

The endosymbiotic theory states that mitochondria and chloroplasts evolved from prokaryotic microorganisms that entered into a primitive eukaryotic cell.

This theory is supported by certain features of mitochondria and chloroplasts such as a similar size to prokaryotes.

In conclusion, evidence do not include the arrangement of the organellar DNA.

Learn more about mitochondrial DNA here:

brainly.com/question/1563697

#SPJ1

8 0
1 year ago
Help me please and hurry!!!
Bezzdna [24]

Answer:it is important to preserve nature because it helps us get resources. Helps us breathe and survive. Ans we wouldn’t have many things if it weren’t for nature

Explanation:

5 0
3 years ago
Read 2 more answers
PLEASE ANSWER
djyliett [7]

Answer:

The make-up of the earth's interior.

Explanation:

I took the quiz and got all of them right. Hope it helps!

6 0
3 years ago
Read 2 more answers
2. The number of protons in its nucleus determines an atom’s _____. weight charge properties mass
adoni [48]
Answer: The answer is charge. Protons have charge. Neutrons don't.
6 0
3 years ago
I WILL GIVE BRAINLIEST if you answer number 5
Nuetrik [128]

Answer:

The two main forms of solar energy transformation technologies are photovoltaic and thermal.

Explanation:

7 0
3 years ago
Other questions:
  • What is the difference between a food chain and a food web?
    10·1 answer
  • Which would least likely result from a chromosomal change?
    12·2 answers
  • What would be the answer to Friday?
    5·2 answers
  • What makes up the cell wall
    14·1 answer
  • Can you use different gender urine if on period for drug test
    12·1 answer
  • Which of the following lists the steps of technological development in the
    13·2 answers
  • A go cart rolling at a speed of 2 m/s begins to accelerate down an inclined street at a constant rate of 1.5 m/s¶. It takes the
    10·1 answer
  • Who provides the most energy in an ecosystem
    12·1 answer
  • A restaurant offers 10 appetizers and 12 main courses. How many ways can a person order a​ two-course meal? There are______ ways
    8·1 answer
  • if a dna strand has the nucleotide sequence of CCGAGTTG, what is the nucleotide sequence of the complementary strand
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!