tudents put the same type of bacteria in 15 Petri dishes. Antibiotic A was applied to 5 dishes, Antibiotic B was applied to 5 dishes and Antibiotic C was applied to 5 dishes. At the end of 2 weeks, the number of bacteria colonies were counted. What is the independent variable?

Answers

Answer 1

Answer:

The type of Antibiotic.

Explanation:

The independent variable is the variable that is changed in an experiment.

In this case, there are different types of antibiotics in this experiment.


Related Questions

What properties of carbon explain carbon's ability to form different large and complex structures?

Answers

The properties that allow this are the carbon's four valence electrons, and the fact that they can bond with other carbon atoms.

In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?

A. stratosphere
B. asthenosphere
C. magnetosphere
D. lithosphere​

Answers

Answer:B

Explanation:The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. It lies between about 100 kilometers (62 miles) and 410 kilometers (255 miles) beneath Earth's surface. The temperature and pressure of the asthenosphere are so high that rocks soften and partly melt, becoming semi-molten.

Which tree harvesting method removes whole trees in rows in several cuttings over several years?
seed-tree cutting
shelterwood cutting
strip logging
whole-tree harvesting

Answers

Answer:

shelter wood cutting is the answer

Explanation:

hope it may help you

Organisms need ?to conduct essential life activities

Answers

Explanation: Living organisms must take in *energy* via food, nutrients, or sunlight in order to carry out cellular processes. The transport, synthesis, and breakdown of nutrients and molecules in a cell require the use of energy. hope this help!!

Answer:

im pretty sure the answer is cells.

HELP ME 40 POINTS!!!
1.A single statement that describes the purpose or reason for conducting an 1 point
experiment without making a prediction.
2. The word simply states that the results obtained were due to chance and not the independent variable that the researcher changed or the situation that they engineered
3. This is a statement predicting the direction of a relationship between variables
4 it predicts the findings of study

Answers

To determine what sort of data table will be most useful or The purpose of an experiment is to test a hypothesis at least that's what i know.  I do think "3. This is a statement predicting the direction of a relationship between variables" Is the right ansswer. Sorry if i'm wrong. :c

Which statement associated with mosquito helps understand that malaria is a
communicable disease?
(a) The causative agent of malaria is a protozoan.
(b) The mosquito carriers the parasite Plasmodium that causes malaria.
(c) The mosquito lays its eggs in water collected in tyres, coolers, and open pits.
(d) The parasite is transferred inside the body of a health person along with the
mosquito bite.

Answers

Answer:

(d) The parasite is transferred inside the body of a healthy person along with the mosquito bite.

What cell parts are common to all of these cells?

Use complete sentences.

Answers

Answer:

between an animal cell and a plant cell there are some parts that are similar and carry out the same function like:

both have a cell membrane which selects what goes in the cell.

both have cytoplasm which holds the protoplasm(the living part of the cell)

both have a nucleus which carries out all cell activities and holds threads of DNA called chromosomes

both have a mitochondria which is the power house of the cell

both have golgi bodies which modify and carry proteins from sites of synthesis to sites of reaction

I hope this helps

Mitosis undergoes 4 stages. PICK ONE stage and outline what happens in this stage?

Answers

Prophase;
nucleolus disappears
nuclear membrane disintegrates
chromatids shorten and thicken and appear to lie side by side in pairs, joined by a centromere.
centrioles migrate to opposite poles
spindle fibers begin to form.

¿De qué forma se puede aprovechar los fenómenos naturales para solucionar los problemas de alimentación?

Answers

no tiene sentido la pregunta, supongo que tiene pros y contras pero los problemas no se solucionan con más problemas

describe the human population growth curve over the past 10,000 years, and identify the type of population growth curve it represents


p.s I will give brainless

Answers

Explanation:

Global human population growth is around 75 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 7 billion in 2012.

Although the direst consequences of human population growth have not yet been realized, exponential growth cannot continue indefinitely.

In the late 1970s, China’s “one-child” policy tried to control population growth, but restrictions were relaxed in the early 2000s.

How are disaccharides formed?

Answers

Person above me seems smart

Which of the following types of compounds is unlike the other three?
A-wax
B-saturated fat
C-phospholipid
D-polysaccharide

Answers

Answer:

D-polysaccharide

Explanation:

A polysaccharide is a carbohydrate while the others have to do with lipids.

How does an mRNA strand reach the site for Translation?
A. It moves across the membrane through Active Transport
B. It exits the Nucleus through a Nuclear Pore
C. It is already where it needs to be, Translation occurs as soon as the mRNA is processed
D. A tRNA molecule carries it to the Ribosome

Answers

The strand of mRNA passes from the A to the P sites of the ribosome before exiting at the E site. At the A site, tRNA molecules connect to the codons of mRNA before moving to the P site, where their amino acid is added to the growing polypeptide chain.

The correct answer is B: it exits the nucleus through a nuclear pore.

During Anaerobic respiration:
A. glucose is converted into Lactic Acid.
B. glucose is converted into ATP.
C. ATP is converted into Lactic Acid.
D. glucose is not used as the energy source, since there is no oxygen.

Answers

The answer is A as during anaerobic respiration, as there is no oxygen, glucose is converted into ethanol and lactic acid to produce some energy.

During the process of anaerobic respiration, glucose is converted to lactic acid in the absence of oxygen. So the correct option is A.

What is anaerobic respiration?

The type of respiration in which the sugars are broken down in the absence of oxygen. Here the final electron acceptor is not oxygen. The organisms that perform anaerobic respiration have evolved to use other substances as their electron acceptors.

Aerobic respiration happens in presence of oxygen. In both of these types of respiration, glucose is broken down into pyruvate and then it enters a series of reactions using an electron transport chain to produce ATP. This is where they require a final electron acceptor which can be oxygen, nitrate or sulfates etc.

The process of breakdown of glucose is called glycolysis. and after that two pyruvate molecules are produced. In anaerobic respiration, these molecules undergo reactions in the cytoplasm to produce ATP with the help of sulphur, sulfates, nitrates, fumarates etc as the final electron acceptor.

Anaerobic respiration produces less ATP compared to aerobic repiration.

Read more about Anaerobic respiration, here

https://brainly.com/question/12605249

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A new video game manufacturer has claimed to make an entertaining action games that can improve your vision

Answers

Answer:

The video game manufacturer will have to provide evidence to support their findings. If you wanted to test their claim, first write a null and alternate hypothesis and do tests that provide data that can either reject or fail to reject the null hypothesis

Explanation:

Assertion : Parenchyma cells help in storage of food. Reason : Parenchyma cells are the main seats of photosynthesis.

Answers

Answer:

Assertion and reason are true and reason is the correct explanation of assertion

Social issues that could lead to environmental injustices?​

Answers

Answer: can you exsplain you question a little better i will edit my answer when you do.

Explanation:

If a red fox, sage shrub, fence lizard, and grasshopper were arranged which one has the least amount of energy

Answers

Sage shrub (I'm so sorry if it's wrong)

Explanation:

Sage shrub >>> grasshopper>>>fence lizard>>>red fox

Pepsin and Trypsin are enzymes. At what pH do they have the highest rate of reaction?

Answers

Answer:

It has an optimum pH of about 1.5. Trypsin's optimum pH is about 8.

Explanation:

This active trypsin acts with the other two principal digestive proteinases — pepsin and chymotrypsin — to break down dietary protein into peptides and amino acids. These amino acids are essential for muscle growth, hormone production and other important bodily functions.

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How is the DNA described and what does this mean ?

Answers

Answer:

DNA stands for deoxyribonucleic acid, which is a molecule that contains the instructions an organism needs to develop, live and reproduce. These instructions are found inside every cell and are passed down from parents to their offspring.

Answer:

DNA is made up of molecules called nucleotides each nucleotide contains a phosphate group, a sugar group and a nitrogen base. the four types of nitrogen bases are adenine (A), thymine (T), guanine (G), and cytosine (C). Deoxyribonucleic acid or DNA is a molecule that contains the instructions an organism needs to develop, live and reproduce. These instructions are found inside every cell, and are passed down from parents to their children.

5. Identify Patterns To analyze the characteristics of life, why is it useful to identify
patterns at the level of molecules and cells?
NOTEBOOK

Answers

334333till cdftgj vnnnmm

jelaskan bagaimana cara kerja pengawet dalam mengawetkan makanan.

Answers

i really like the gibberish

Which organisms feed on host organisms, causing them harm
A. herbivores
B. parasites
C.carnivores
D.omnivores

Answers

Answer: C. Parasites

An example of this would be a Flea or Tick feeding on a cat- the host.
parasites, i jst took a test on this.

Can anyone help
Me if y’all know this?

Answers

Answer:

62 dg = 0.62 dag

72,448 mm = 72.448 m

0.641 L = 641 mL

10,000 cm = 0.1 km

0.998 dL = 0.0998 daL

78,548 m = 78,548,000 mm

45 hg = 4500000 mg

97,123,582 mm = 97.123582 km

0.00741 kL = 7,410 mL

745 g = 74,500 cg

25 mm = 2.5 cm

0.005741 kL = 574,100,000 cL

5 example of balanced and 5 example of unbalanced​

Answers

Answer:

I think you asked for balanced and unbalanced chemical equations. your answer is in the attachment !

I'm not sure if you're talking about forces or not, but ill answer anyways.

Balanced Forces:

A person standing/sitting stillAn object floating in the waterPicture frames on a wallA jacket hanging on a coat rackA tug of war game where neither side is winning

Unbalanced Forces:

A car acceleratingAn object sinking in waterAn object getting knocked over by the windA fruit dropping from a treeRiding a skateboard

In what layer of the epidermis does mitosis
occur?

Answers

Answer:

Mitosis occurs in the deepest layer of the epidermis, which is called the stratum basale.

Definition: Any living thing with one or more cells.
Example: You
Term?

Answers

Answer:

multicellular organism

Explanation:

Which of the following would not be facilitated diffusion?
A: A water molecule passes through a semi permeable membrane
B: A large glucose molecule enters the cell through a pore protein
C: An amino acid exit the cell through an integral protein
D: A chlorine ion (CI-) unlocks a protein channel, and passes through

Answers

Answer:

A. A water molecule passes through a semi permeable membrane

Explanation:

Facilitated diffusion is the diffusion of a molecule without any assistance from a protein or protein channel.

In facilitated diffusion, a molecule will diffuse by itself through a semi permeable membrane, such as the cell membrane.

Answer choices B, C, and D are incorrect because they are all examples of facilitated diffusion. The molecules required assistance from a protein.

Answer choice A is correct because the water molecule was able to pass through by itself.

So, the correct answer is A. A water molecule passes through a semi permeable membrane

Neon is a colorless gas that is not known to reach with any other substance. Which other element is most likely to be a nonreactive gas?
A. Xe, number 54
B. F, number 9
C. Cs, number 55
D. Na number 11

Answers

Xenon is a noble gas. As it has a full valence (outer) shell, it is usually inert (unreactive)

You are building a birdhouse when you cut your finger. Predict which body systems would be immediately involved with your reaction to the cut.

Answers

I think it is the immune system I'm not sure

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