How many factors should a well-designed experiment test at one time?
a) 1 time
b) 2 times
c) 3 times
d) depends on the number of experiment variables

Answers

Answer 1

Answer:

Just look it up

Explanation:


Related Questions

Which describes a group of organisms that are members of species

Answers

Can you include a photo please?

What are two specific examples of where this division occurs in nature?

Answers

Answer:

There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells.

Explanation:

hope this  helps you.

what are the biological important of tomatoes​

Answers

Answer:

They protect heart health

Tomatoes contain an antioxidant called lycopene, which is responsible for their red color. Research suggests that in terms of heart health benefits, it's more effective to eat tomatoes and tomato products than take lycopene supplements

Explanation:

Tomatoes are the major dietary source of the antioxidant lycopene, which has been linked to many health benefits, including reduced risk of heart disease and cancer.

They are also a great source of vitamin C, potassium, folate, and vitamin K.

Usually red when mature, tomatoes can also come in a variety of colors, including yellow, orange, green, and purple. What’s more, many subspecies of tomatoes exist with different shapes and flavor.

What characteristics of organisms does the Linnaean system of classification use to give organisms their specific name?

A. genetic
B. evolutionary
C. environmental
D. physical

Answers

Answer:

D, Physical

Explanation:

Linnaean classification uses visible physical features. It has a kingdom-to-species taxonomy. Each species has a distinct two-word Latin name. Therefore, option (D) is correct.

What is Linnaean system of classification?

The Linnaean system classifies organisms according to their outward morphological and behavioural similarities. A hierarchy of taxonomic levels, from the kingdom down to the species, makes up this structure. A distinct, two-word Latin name is bestowed for each and every species.

Carl Linnaeus, the "Father of Taxonomy," named and organised species. His hierarchical categorization scheme and binomial nomenclature system were major advances to taxonomy (two part naming method). The Linnaean system organises organisms into Kingdom, Phylum, Class, Order, Family, Genus, and Species. Latin names are global. A species' scientific name includes its genus. Italics or underlining cover the name. Humans, for instance. It's Homo sapiens.

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Explain why ecological succession occurs.

Answers

Ecological succession occurs due to the changes in physical environment and population of species. In an ecosystem, a species requires a particular set of environmental conditions under which they grow and reproduce.

Ecological succession occurs due to the changes in physical environment and population of species. In an ecosystem, a species requires a particular set of environmental conditions under which they grow and reproduce.

What is an Ecological succession?

Ecological succession is the process by which plant communities develop over a period of time on the land where there was no vegetation.

The succession begins with a pioneer species such as lichens, some fungi species. Species such as lichen begins to secrete acids that begin to break the barren land into small particles.

The small particles mix with lichen remains and starts soil formation.

Thus, Ecological succession occurs due to the changes in physical environment and population of species.

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What happened in the 1980’s with environmental laws and regulations because some people claimed that the laws and regulations were hurting the economy?

Answers


Environmental regulations remain deeply contested and cause concern for some that the costs will simply be too high. ... Furthermore, these benefits outweigh the cost. The outdated traditional view pits the environment against the economy, inferring that regulation is detrimental to economic prosperity.

Environment laws were stricter in the 1980s. Thus, people contested them saying that this will increase inflation.

What are environmental laws?

Several environmental laws have been adopted over the last five decades in the United States. These laws have resulted in dramatic effects on the air and water quality of the nation. These have also reduced the exposure of people to toxic chemicals.

Various generations of the American public have benefitted from the legacy of leadership that has taken environmental issues as their primary priority. The benefits achieved by these laws and efforts have been controversial, to say the least.

Some of these laws have resulted in the utilization of huge amounts of public funds. Because of the misconception of a large number of the public that environmental issues are not serious or real, people believe that spending huge sums of money on environmental issues is a waste of a form of corruption.

Therefore, because the environmental laws were stricter in the 1980s, people contested them saying that this will increase inflation.

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1. List five things you use daily whose production is a direct result of microbial action. In addition to the product include what produces the products (bacteria. mold etc). and the brand names of the products. (This is a list and does not require grammatically correct sentences.)

Answers

Answer:

Various day to day use item are made because of direct from a huge amount of different microorganisms. microscopic organisms, molds, or a blend of these. Microorganism which are utilized in food creation such as alcohols, bakery products and esters are formed with fermentation.

1. Drinks like brew and wine ' - Saccharomyces cerevisiae

2. Cheese: Penicillium roqueforti and camemberti  

3. Soy sauce: by utilizing aspergillus species particularly A. oryzae

4 Bread and pastry shop items : Saccharomyces cerevisiae  or Yeast by producing Co2 by the process of fermentation.

5. Fermented milk items : Lactobacillus, Bifidobacterium and lactococcus.

Drew observed in an experiment that algae in a nearby lake could be found at six meters below the water's surface on a clear day. On a cloudy day, Drew noted that the algae sat only one meter below the surface of the water. What was the dependent variable in Drew's experiment? the lake that Drew observed the depth at which Drew found the algae the amount of algae measured the sky conditions on a particular day

Answers

Answer:

The depth at which Drew found the algae

Explanation:

The dependent variable was the depth at which he found the algae, because that is what he measured on each day.

The independent variable was the sky conditions, since that changed from clear to cloudy, which impacted the dependent variable/the depth of the algae.

How many amino acids must be obtained in the diet because they cannot be made by the body?
O 2
O 5
O 10
O 20

Answers

The answer would be 10. Its also mentioned on a quizlet flash card. Hope this helps

Answer:

C

Explanation:

Edge 2021 did the quiz and got 100%

Which stage of the cell cycle can lead to uncontrollable reproduction in mutated cells? (2 point)
O G2
O G1
O S
O M

Answers

I think it’s.... Stage S

Which disease can be transmitted by ticks?

Answers

lyme disease, ehrlichiosis, rocky mountain spotted fever, and tularemia

Thursday/Friday:
(Read and write/answer question in yellow)
A student wants to test if giving dogs a toy to play
with makes their tail wag more. He gives dog toys to
one group, while another group of dogs does not
get any toys. He counts the number of times each
dog wags their tail.
What is the Independent Variable?(tested) The
Dependent Variable?(measured)
Yes

Answers

Answer:

I/V = giving the dogs toys

D/V =  how many times the dogs wag their tails

Explanation:

dependent variable DEPENDS on the independent variable. If he gave a dog a toy and their tail wagged, he made that happen by giving the dog a toy, which is the independent variable because he made that happen, by changing the circumstance aka the independent variable aka the toys!


WILL GIVE BRAINILY

Answers

Answer:

You need to make a graph of this data that is given to you.

Explanation:

Explain the health effects of excess discretionary calorie consumption on the body. What alternative sweetener and fat choices can help address excess consumption of discretionary calories? Will the use/consumption of these alternatives address body weight?

Answers

Answer:

Descretionary calories are the calories left over after an individual meets his/her day by day supplement requirements.The result of Descretionary calories is high muscle fat ratio and weight gain or obesity.

Health risk :

Here and there high optional calorie intake may lead to weight on a people body optional calorie are high in fats, sugars and phenomenal admission of these kinds of food expands your danger factors for type 2 diabetes,heart ailment and disease.

Alternative sweetener and fat choices:

Fruits and vegetable with dressing as they are natural and high in sugar content and use fructose which absorbs in small intestine. The natural sweetener that can be alternatively use are stevia, aspartum, agave syrup, saccharin and sucralose and other natural alternatives.

Avoid oils high in saturated fat and include PUFA and omega rich unsaturated fat which is god for health.

These alternative food choices are known for providing less fat and no to less calories that help direct and indirectly in weight loss and lowers the risk of diseases.

Which feature of model 1 best illustrates how biological information is coded in a DNA molecule?


The 5′ and 3′ labels at the ends of each strand

The 5′ and 3′ labels at the ends of each strand
A

The labeling of the hydrogen bonds between base pairs

The labeling of the hydrogen bonds between base pairs
B

The lines connecting sugars and phosphate groups that represent covalent bonds

The lines connecting sugars and phosphate groups that represent covalent bonds
C

The linear sequence of the base pairs

Answers

Answer:

The correct answer is - option C. The linear sequence of the base pairs .

Explanation:

The double helix structure is presented in the model which exhibits the two major and important characteristic of the DNA molecule. The first major property of the double helix model shows that each strand of the molecule acts as a template for the creation of the complimentary strand.

The second  major property is that the genetic information can be be store in the linear sequence of the nucleotide or the base pair along with the backbone of the molecule.

Thus, the correct answer is - option C. The linear sequence of the base pairs .

The FRAP technique occurs in a series of steps. Select every statement that correctly describes a step in the FRAP procedure.A. The speed of repair of the fluorescent marker is measured.B. All fluorescent molecules in the cell are irreversibly bleached.C. The relative mobility of the fluorescently labeled molecule is measured.D. The molecule of interest is fluorescently labeled.

Answers

Answer:

The answer is "Option C and Option D"

Explanation:

FRAP is used only for protein motion management.  It travels throughout two dimensions in the plasma membrane. It includes many available-moving or immobile proteins.  This technology uses globally marked fluorescent bleaching products, and also includes the fluorescent proteins, but one particular area is washed.  

Its protein arc changes are detected by fluorescence reappearance. The fluorescence reappears at a certain stage if the protein can move freely. When the proteins aren't able to move quickly, fluorescent dyes are recovered after a little period, and fluorescence would not resurface during that point if the enzyme is immobile.

What phenomenon is observed due to adhension

Answers

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another (cohesion refers to the tendency of similar or identical particles/surfaces to cling to one another). The forces that cause adhesion and cohesion can be divided into several types.

Which of these molecules would you least expect to easily dissolve in water?a. sucrose b. potassium chloride c. acetone d. 2-methylpropane e. acetic acid

Answers

Answer:

D. 2-methylpropane

Explanation:

The ability of a substance to dissolve in water is dependent on whether the molecules of the substance are polar or non-polar . Since water is a polar molecule, polar molecules readily dissolve in it in accordance with the principle of "like dissolves like".

Sucrose is a polar molecule since like water, it has bonds between electronegative oxygen, and electropositive hydrogen. Thus, it dissolves in water.

Potassium chloride is an ionic and hence polar molecule. It readily dissolves in water.

Acetone is a polar molecule due to the polar nature of the carbon-oxygen double bond in the molecules. Thus, it easily dissolves in water.

2-methylpropane is a non-polar molecule. The C-H bonds present in its molecules are non-polar, so it does not readily dissolve in water.

Acetic acid is a polar molecule due to carbon-hydrogen bond as well as oxygen-hydrogen bond. It readily dissolves in water and forms hydrogen bonds with water molecules.

For the following question, which is the best hypothesis "Does exposure to radon (a source of natural radiation) in your home cause an increased risk of cancer?"


Everyone who is exposed to radon will die from cancer.

People should not risk exposure to radon!

Cancer may be caused by many different factors, including exposure to radiation, chemicals and too much stress in a person's life.

I am immune to cancer because there is no history of cancer in my family.

People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.

Answers

Answer:

People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.

Explanation:

Hypothesis of an experiment is a testable explanation or a suggested solution that aims to answer a question asked or solve an observed problem. The hypothesis must be able to be tested via experimentation and must not be true. A good hypothesis should include the independent and dependent variables in it.

For the problem/question asked in this experiment that: Does exposure to radon (a source of natural radiation) in your home cause an increased risk of cancer?"

The best hypothesis that provides a testable answer to this question is: People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.

From the above hypothesis, we can see that it contains the independent variable, which is exposure to radon, and the dependent variable, which is cancer rate

People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.

Mutations are alterations in the DNA (nucleotide) sequence of the genome of an organism.

Cancer is a multifactorial disease that is associated with mutations in DNA.

Radon is a mutagenic agent that increases the risk of mutation leading to cancer.

In conclusion, people who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.

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The excerpt is from an article that Roberto read for science class called “Using the Scientific Method to Study Tomatoes.”

The student performed an experiment to test his hypothesis about sunlight and plant height using two plants. He kept everything the same between two tomato plants except he exposed them to different amounts of sunlight. He also used a third plant as a control group, or a group in which no variables are manipulated to confirm the results.
Roberto critiqued the work. Which problem did Roberto most likely identify?
The sample size is too small.
Too many variables are manipulated.
It is not possible to keep the conditions the same.
Controls should only be used in studies of animals.

Answers

Answer:

The sample size is too small.

Explanation:

The process of elimination helped me find this answer.

It is possible to keep the conditions the same.

there are only 2 plants and one control, that's obviously not a lot.

and controls can be used on more than studying animals.

When using the scientific method you can use as many test subjects as you can so it can help you confirm. two plants are not a lot.

I've also had a teacher confirm that this is the correct answer.

edge 2020

The problem that Roberto most likely identify is the sample size is too small. The correct option is A.

What are scientific methods?

Scientific methods are a series of methods that are done to extract correct and logical results. The method includes making a hypothesis, going through the process of calculations, making a conclusion, and then the result.

Roberto is studying the growth of tomatoes under sunlight. The hypothesis is that sunlight affects the height of the tomatoes. He took plant samples, but the study took time because the plant samples were too small. So taking the right size of plants is very necessary otherwise the whole study will do in vain.

Thus, the correct option is A. The sample size is too small.

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Is the overall air quality in this country is better now than it was 40 years ago.

Answers

Yes there is better air quality


Minos, king of Crete, had made war upon Athens. He had come with a great fleet of ships and an army, and had burned the merchant vessels in the harbor, and had overrun all the country and the coast even to Megara, which lies to the west. He had laid waste the fields and gardens round about Athens, had pitched his camp close to the walls, and had sent word to the Athenian rulers that on the morrow he would march into their city with fire and sword and would slay all their young men and would pull down all their houses, even to the Temple of Athena, which stood on the great hill above the town. Then Aegeus, the king of Athens, with the twelve elders who were his helpers, went out to see King Minos and to treat with him.

–“The Cruel Tribute,”
James Baldwin

Which detail from the passage creates the most suspense for the reader?

“Minos, king of Crete, had made war upon Athens.”
“He had laid waste the fields and gardens round about Athens.”
“Then Aegeus, the king of Athens . . . went out to see King Minos and to treat with him.”

Answers

Answer:

“Then Aegeus, the king of Athens . . . went out to see King Minos and to treat with him.”

Explanation:

just took the test

It is likely that the detail that creates the most suspense for the reader is "He [Minos]  king of Crete, had made war upon Athens.”

What was the confrontation between Minos and Athenian ruler?

It is likely that the detail that creates the most suspense for the reader is "He [Minos] had sent word to the Athenian rulers that on the morrow he would march into their city with fire and sword and would slay all their young men and would pull down all their houses, even to the Temple of Athena, which stood on the great hill above the town."

This detail implies that the confrontation between Minos and the Athenian rulers will be violent and destructive, and the reader may be left wondering what will happen as a result. Additionally, the fact that Minos has already laid waste to the surrounding area and burned the merchant vessels in the harbor suggests that he is a formidable and potentially dangerous opponent, further increasing the suspense for the reader.

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What was the result of the overhunting of sea otters along the Pacific Coast?

The sea otters on the Pacific Coast went extinct.
The sea urchin population expanded and consumed the kelp and damaged the habitat.
The sea urchin population was reduced to dangerous levels.
The kelp grew rapidly and created new habitat for fish.

Answers

Answer:

The sea urchin population expanded and consumed the kelp and damaged the habitat.

Explanation:

Sea otters prey on sea urchin and keep their population under control. Without sea otters, the sea urchin population cannot be kept in check and they will over consume kelp.

Devastating effects resulted from the excessive sea otter hunting around the Pacific Coast. Because sea otters are a keystone species in the ocean, they have an outsized impact on their surroundings. They eat kelp forests, which in turn eat sea urchins.

What happened without the sea otters ?

Without sea otters to control their numbers, the sea urchin population grew and ate up the kelp, harming the environment. Fish depended on the kelp forests for cover, hence this led to a drop in the fish population. The sea otter species came dangerously close to extinction as a result of the rapid population fall.

The government has designated sea otters as a species of special concern in the United States, so this was very alarming.done action to safeguard them. The Pacific Coast environment was affected by the sea otter population collapse, which also had an impact on the fish population and kelp forests.

The overhunting of sea otters has led to the implementation of many conservation initiatives. Reintroducing sea otters to the Pacific Coast is one such initiative.

By lowering the sea urchin population and enabling the kelp to regenerate, this has helped to restore the ecosystem's equilibrium. In order to safeguard the species and assure its survival, the government has also imposed limitations on the hunting of sea otters.

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Which of the following processes do not take place in the mitochondria? a) citric acid cycle b) conversion of pyruvate to activated acetyl groups c) oxidation of fatty acids to acetyl CoA d) glycogen breakdown

Answers

Answer:

D

Explanation:

The breaking down of glycogen-glycogenolysis takes place in the cytosol of cells of the liver and muscles.it is the compensatory process for providing glucose depleted cells with extra glucose. It is the opposite of Glucogengenesis the formation of glycogen in cells.

it involves the activities of enzymes glycogen phosphorylase which catalysis the removal of alpha1-4glycosidic bonds from the glycogen molecules.Thus freeing the glucose molecules from the glycogen while retaining the 1-6 glycosidic bonds.

Its stimulation is by  epinephrine hormone.while  the hormones glucagon from the pancreas control its release into the blood stream,Thus the low levels of glucose in the blood stream caused glucagon to initiate  the breakdown of glycogen in the liver and muscles down to glucose.As the level of this rise in the blood stream Insulin stimulates the entry of the glucose into the cells reducing the levels of blood glucose,inhibiting glucagon levels ,and therefore stopping Glycogenolysis.

Stem cells renew tissues but are all lost in childhood.a) trueb) false

Answers

Answer:

False

Explanation:

Stem cells are different type of cells in human body that can develop into different other body cells like muscles cells or brain cells and they gave the capability to renew themselves through mitotic cell division.

Stem cells are not lost in childhood but can be use to treat diseases or infection, it can be use to grow new cells and replace damaged body cells.

Bread and pasta are carbohydrates commonly consumed by people what chemical feature of carbohydrates makes them necessary food?

Answers

Answer:

It gives the body energy and calories

Which is true about visible light?
A. It travels fastest through a medium, such as water or air.
B. It is the only part of the electromagnetic spectrum that
we can see.
C. It cannot travel through a vacuum.

Answers

Answer:

B

Explanation:

Light travels through medium but is fastest through vacuum, so C is wrong, and A is wrong. B is the correct answer.

Answer is B because light travels through medium

biogechemical cycles on earth serve on earth serve a variety on different purpose. what do the biogechemical cycles have in common

Answers

Answer:

Son procesos naturales que reciclan elementos en diferentes formas químicas desde el medio ambiente hacia los organismos, y luego a la inversa. Agua, carbón, oxígeno, nitrógeno, fósforo y otros elementos recorren estos ciclos, conectando los componentes vivos y no vivos de la Tierra

Explanation:

A student wonders whether removing the nucleus from a cell would result in a new prokarytic cell. Why would this procedure fail to produce a prokaryotic cell

Answers

The cell would lack genetic information.

Answer: Yes the cell would lack genetic information

Explanation:

Sedimentary rock is converted into metamorphic rock with the addition of
A.nuclear energy
B. Kinetic energy
C. Potential energy
D. Heat energy

Answers

D. Heat Energy


Sedimentary rock is converted into metamorphic rock with exposure to heat, pressure, heated mineral solutions, or a combination of any of them.
D. Heat Energy

When sedimentary rocks are buried deep beneath the earth’s surface, great pressure and tremendous heat change these rocks into new rocks containing different minerals. These are metamorphic rocks.
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Select the appropriate shape for the given volume formula If an event were to have occurred about 5000 years ago, it would haveoccurred in which of the following years? *O 5000B.C.O 5000A.D.O 3000B.C.O 3000A.D. Distribute the expression (u - 6) x 4. "It was as simple as that. Once he had yearned for choice. then, when he had had a choice, he had made the wrong one: the choice to leave. And now he was starving. But if he had stayed... His thoughts continued. If he had stayed, he would have starved in other ways. He would have lived a life hungry for feelings, for color, for love." pahe number Minerva McGonagall ordered pizza and a steak fordinner.A) Add a CommaB) Don't Add a Comma There are 67 questions on an exam. If you miss 8 of these questions your grade is _______ %. plane. Explain your reasoning.MOVIES An online DVD rental company charges $15 a month for unlimited rentals. Determine whether the total paid after each month isproportional to number of months by graphing on the coordinate plane. Explain your reasoning.InhuOa. No, because the graph of the line does not pass through the origin.Ob. Yes, because the graph is a straight line that passes through the origin.Oc. No, because the graph of the line passes through the origin.Od. Yes, because the graph is a straight line that does not pass through he origin.huThu"huesRes please heeeelp me It is late Tell me all the properties of algebra An owner of a small firm needs to hire some managers. Assume that each manager has time todo only one task. Task A is worth $100,000 to the owner, Task B is worth $75,000, and Task C isworth $50,000. The owner hires only two managers, having one to do Tas A and the other TaskB. What is the opportunity cost of Task B? In order to be called afoodbore illness outbreak,what is the minimum numberof people who must get sick?A 1B 2C 3D 4 Which temperature scale measures water boiling at 373 degrees?A.FahrenheitB. Kelvin C. Celsius D. Newton Lana is studying the deer that live in a forest. She concludes that all of the deer are members of the sameChooselybecausethey look alike and breed with one another. Next, she observes how the deer Choose...Choose...interand otherhydrosphereliving things of the forest Choose...geosphereecosystemspecies Factoring expressions 3x+ 12 What is the size of South America in Comparison to the other continents?? Why is the U.S. Constitution one of the most respected political documents in the world today? MULTIPLE CHOICE QUESTIONWhat type of exponent needs absolute value bars?linkoddeven Radha said I did not sing put the puntuation atoms and molecules that make up a rock a>never move b>are in constant motion c>move when the rock is broken d>move when the rock is melted If a healthcare professional previously practice midwifery what position might she be able to transition to easily