Biology High School

An experiment in which only one variable is changed is a(an) __________ experiment.




A. randomized


B. natural


C. double blind


D. controlled

Answers

Answer 1

Answer;

D. controlled

An experiment in which only one variable is changed is a controlled experiment.

Explanation;

-A control experiment is an experiment where the researcher only changes one variable at a time in order to isolate the results.

In a controlled experiment, most conditions are constrained so that they do not change. One or two other conditions are then changed and measured by the experimenter. These are known as the independent variables.

For example; An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation.

Answer 2

An experiment that is only one variable that has changed is a controlled variable experiment.

the independent/controlled variable

is a variable that can be changed according to the purpose of the experiment

Further explanation

The development of chemistry begins with experiments that consist of chemical stages/processes. This method is a form of the scientific method that is commonly used by scientists in carrying out experiments.

Several experiments, trials, and errors will be carried out to test the hypothesis until the expected results are in the predetermined problem at the outset.

Variables, which can be determined in 2:

1. independent variable

, which is a variable that can be changed according to the purpose of the experiment

2. fixed variable, i.e. variable whose value is constant and observed to determine changes in independent variables

We can control independent variables according to the results of the experiments to find conditions that have the most optimal results so that the goals of the problems that have been set will be achieved.

The continuous investigation is so that the control variables are not out of the problem boundary

So the right choice is a controlled variable

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Keywords: scientific method, fixed variable, an independent variable

An Experiment In Which Only One Variable Is Changed Is A(an) __________ Experiment.A. Randomized B. Natural

Related Questions

Tsunamis are caused by _______. a. underwater volcanoes b. El Niño c. underwater earthquakes d. global warming

Answers

Tsunamis are caused by "Underwater Earthquakes" 

So, Option C is your answer! Hope this helps!
C is the correct answer

In a food web, arrows poinet in just one direction beacsue the show what?

Answers

It shows that flow of energy in the ecosystem is "Uni-directional" means energy flows only in one direction never reverse

Hope this helps!

When the cell excretes sodium from within, against the natural tendency of matter, it is performing

Answers

When the cell is removing and or excreting sodium from within the cell, against the natural tendency of matter, it is performing a type of active transport, called exocytosis, I believe. The sodium ions become associated with membrane enclosed structures called vacuoles, from the Golgi apparatus and later merge with the cell membrane of the cell to dispose the sodium carried within the vacuoles.

The coyote (canis latrans) is found across North America which makes it a specialist species.
true or false

Answers

The coyote (canis latrans) is found across North America which makes it a specialist species. Its false

its super False broooooo

What two components are often found as part of an enzyme?

Answers

Two components that are very common and often found are:
1. Simple Enzymes which are called like this cause usually are composed of proteins. It is peptide bonds that linked the amino acids 
2. Conjugated Enzymes. They have two parts. The protein and non protein portion.
Hope this helps you greatly

based on their molecular formulas, witch are not carbohydrates? a.c3h8o3, b.c10h18o9,c.c18h32o16, d.c4h8o2, e,c16h32o2, f
.c6h12o6

Answers

Its C6H12O2 because its a 1:2:1 ratio


Final answer:

Compounds c16h32o2 and c4h8o2 are not carbohydrates as they do not conform to the general molecular formula for carbohydrates, which is Cn(H2O)n where the ratio of Carbon to Hydrogen to Oxygen is 1:2:1.

Explanation:

The general formula for carbohydrates is Cn(H2O)n. It translates to the ratio of Carbon to Hydrogen to Oxygen is in the ratio 1:2:1. From the options: a.c3h8o3, b.c10h18o9,c.c18h32o16, d.c4h8o2, e.c16h32o2, and f.c6h12o6, Compound e (c16h32o2) and Compound d (c4h8o2) do not fit into this ratio and hence are not carbohydrates.

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How to understand the difference from active transport and passive transport?

Answers

Active transport needs to actively acquire energy to occur, while passive transport happens on its own without energy.

Which of the following blood vessels uses elasticity to push blood further along the bloodstream?

Arteries
Capillaries
Varicose veins
Atrioventricular node

Answers

The answer is Arteries 

Arteries carry oxygen-rich blood from the heart to capillaries. On the contrary, veins carry blood without oxygen from the capillaries to the heart. 
Arteries are very flexible and yet strong blood vessels so that efficient transport of oxygen-rich blood along the bloodstream through the organism is enabled.

Answer:

The answer is A. Arteries

Explanation:

1.Compare the natural greenhouse effect with the human-induced process.


2.What are the greenhouse gases? Which one is the biggest concern?


3.What are scientists doing to collect data?


4.What role does the carbon cycle play in this problem?


5.What are the political and economic factors that complicate this problem?


6.Why is the study of global warming so scientifically complicated?


7.Are there skeptics of global warming? What are their arguments?

Answers

1. The greenhouse effect is useful. Without it we would all freeze to death on an earth with no atmosphere. Research has shown that the level of greenhouse gases in the air drop and rise as a natural cycle. However, human induced activities has made the amount of gg in the atmosphere rise to an natural amount. This is due to: cars, the industrial revolution in 19th century etc. 

2. Water vapour, carbon dioxide, methane, nitrous oxide and ozone which occurs naturally. CO2 is the one which is currently the biggest concern as it is increasing the most. 
3. Scientist melt ice containing bubbles of air from millions of years ago and compare it with today to see this is natural. 

4. We cut down trees which photosynthesise and is the only process to remove CO2 from the air. 

5. It is not always economically viable for the government to issue a clean air act which could help reduce problems. They are unwilling to spend money. 

6. Global warming happens naturally as well as global cooling so scientists are not sure if it is us or not. 

7. Yes there are. They say that our activities can't possibly be contributing to global warming that much, though it has been suggested that something like this caused extinction of dinosaurs years ago.

Biologists have separated Monera into two kingdoms according to the differences between the two groups. In which classification does this separation occur?
A) Two kingdom clasification
B) five kingdom classification
C) Six kingdom classification

Answers

The answer is C) Six kingdom classification

6 kingdoms are:
- Archaea
- Eubacteria
- Protists
- Fungi
- Plants
- Animals

According to the previous classification, there were 5 kingdoms:
- Monera
- Protists
- Fungi
- Plants
- Animals

As can be concluded, in the 5-kingdom classification, Monera was the kingdom, but in the 6-kingdom classification, it was divided into 2 kingdoms: Archaea and Eubacteria.

Which of the following contain the genetic code?

1)carbohydrates
2)lipids
3)nucleic acids
4)proteins

Answers

3) Nucleic acid contains the genetic code.

Hope this helps!

Nucleic acids are the carriers of the genetic code. The molecules that carry and transmit genetic information in living things are called nucleic acids, specifically the deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) families. Therefore, the correct option is C.

The fundamental genetic material, DNA, is located in the nucleus of cells, while RNA is involved in gene expression and protein synthesis. Sequences of nucleotides, the constituent parts of nucleic acids, contain the genetic code. Proteins, lipids, and carbohydrates all play important roles in many cellular processes and functions within an organism, but none of them directly contain the genetic code.

Therefore, the correct option is C.

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Why do the sun and moon appear to be the same size when viewed from earth?

Answers

because they are far from earth look like a small stone on the sky

What is the endosymbiotic theory? (Cells)

Answers

The endosymbiosis theory explains how eukaryotic cells may have evolved from prokaryotic cells. Symbiosis is a close relationship between two different organisms.Later, a host cell engulfed a prokaryotic cell capable of photosynthesis. This is where the chloroplast and other plastids originated.

Please help me.. My question is about Science.( The skeletal system) the question is: A thick band of bone forms around a broken bone as it heals. In time, the thickened band disappears. Explain how this extra bone can disappear over time. -- PLEASE HELP ME!!1 ...?

Answers

This extra bone can disappear over time because of a bone cell called an osteoclast which breaks down bone tissue.

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Where do most earthquakes originate?
1) within Earth's core
2) along specific belts within the crust
3) randomly across the entire Earth's surface evenly spaced along the Moho interface

Answers

2) along specific belts within the crust
The best and most correct answer among the choices provided by your question is the second choice or number 2.

Most earthquakes originate along specific belts within the crust.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Which of the following statements about seafloor spreading is false?

A. Continents move as the seafloor spreads along a mid-ocean ridge.
B. The oldest crust is closest to the mid-ocean ridge.
C. Magma rises through the mid-ocean ridge, forming basalt.

Answers

B. The oldest crust is closest to the mid-ocean ridge.
Answer;

B. The oldest crust is closest to the mid-ocean ridge.

Explanation;Seafloor spreading refers to the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge. Seafloor spreading occurs at the mid-oceanic ridge where the divergent boundaries cause two plates to move away from each other resulting to the spreading of the sea floor.As the divergent plates move apart, new materials wells up and then cools at the edge of the plates. Seafloor spreading is important as it helps explain the continental drift in support of the theory of plate tectonics.

Is blood sugar regulated by positive or negative feedback?

Answers

Blood Sugar regulates by negative feedback in order to keep the body in Homeostasis. 

What is the main source of energy that drives the water cycle?

Answers

The sun is the main source of energy.
Final answer:

The sun is the primary source of energy that drives the water cycle. It provides the heat necessary for evaporation, the initial phase of the water cycle, and influences all subsequent stages of the cycle including condensation, precipitation, and surface runoff.

Explanation:

The main source of energy that drives the water cycle is the Sun. The sun's energy warms the oceans and other surface waters, which leads to the evaporation or sublimation of liquid or frozen water into the atmosphere. This water vapor then condenses into clouds, leading to precipitation that brings the water back to Earth's surface again, completing the water cycle.

Evaporation and sublimation are critical first steps in the water cycle. These processes involve the transformation of liquid water or ice into water vapor due to the Sun’s heat.

The water, now in a gaseous state, ascends into the atmosphere where it eventually condenses to form clouds due to lower temperatures at higher altitudes. This is referred to as condensation and it's often followed by precipitation, the process where water is returned to the Earth’s surface as rain, sleet, hail, or snow.

Upon reaching the surface, the water can take several paths. It can flow on the surface, leading to surface runoff, or it can seep into the soil contributing to subsurface water flow. Some of the water ends up in rivers and streams, referred to as streamflow, and eventually makes its way back to the ocean again, completing the cycle.

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Experiments in warmer waters have reported as much as a 50% decline in biomass in habitats that experienced
A. a 6-degree Celsius decrease in water temperature.
B. a 6-degree Fahrenheit decrease in water temperature.
C. a 6-degree Celsius increase in water temperature.
D. a 6-degree Fahrenheit increase in water temperature.

Answers

C 6 degree Celsius increase in water temperature

Answer:

C. A 6-degree Celsius increase in water temperature.

Explanation:

Took the Module 1 Exam.

Some studies have indicated that our eyes naturally travel from bottom left to top right, so putting the diagonal along that path can take advantage of our eye patterns.


True ort False?

Answers

This is true

If you put the diagonal along that path, this will help the photography form seeming split to people. You can also use it to exploit it and make people focus on other parts of the photo by making their pattern go differently while seeming as if it is going regularly.

Answer:

True

Explanation:

I just got 100% on this quiz

Gradpoint

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one way organisms interact is through competition what do organisms compete for

Answers

Food. Habitat. Anything to keep them alive, basically.
Organisms compete for food, water, territory, and dominance.

Most of the pollution that causes acid precipitation to fall in southeastern Canada is released from __________.

central Canada
Mexico
the midwestern and eastern United States
the southern United States

Answers

The answer is C, the midwestern and eastern United States

When bacterial cells participate in conjugation, the bridge between the cells through which dna passes is

Answers

that bridge is called "pilus" provided by F+ bacteria.

When errors occur in dna what activity do checkpoint controls inhibit

Answers

Checkpoint controls inhibit further progression through the cell cycle, preventing further DNA synthesis of DNA that has errors. 

What is combustion and how does ir affect the carbon cycle?

Answers

Combustion is the burning of a substance. It could be complete or could be incomplete. It changes the form of carbon and so it plays it's role in cycle

The large intestine absorbs most of the ________ from the food and some vitamins and minerals.

Answers

The large intestine absorbs most of the nutrients from the food and some vitamins and minerals.

Hope this helps! ^-^

water im [pretty sure because when i answered nutrients it was wrong

Which does not affect the quality or pattern of cloth as it is woven on a loom?
speed of weaving
type of thread used
how the loom is threaded

Answers

I think the answer is how the loom is threaded.
Im sorry but the correct answer here is the first option: Speed of weaving because the question is which does NOT affect. How the loom is threated and the type of thread used are important factors. The speed is not 

Select the FALSE statement below about the structure of myoglobin.

a. The O2-binding pocket of myoglobin contains several nonpolar amino acid sidechains that can interact favorably with a nonpolar molecule of O2.

b. The polypeptide of myoglobin provides a pocket for O2 to fit, and stabilizes the bound O2 via hydrogen bonding with the distal His.

c. The polypeptide of myoglobin protects the heme iron from oxidation.

d. The active site of deoxy myoglobin is 5-coordinate with a histidine occupying one axial position while the other axial position is left open for oxygen binding.

e. Myoglobin has a single polypeptide chain so it has 1o, 2o, 3o and 4o structure.

Answers

The answer is e. Myoglobin has a single polypeptide chain so it has 1o, 2o, 3o and 4o structure.

Myoglobin is an iron and an oxygen binding protein. It has a single polypeptide chain. Proteins with the single polypeptide chain cannot have quaternary (4o) structure. 4o structure of proteins includes an arrangement of multiple folded polypeptide chains (subunits) in a multi-subunit complex. Therefore myoglobin cannot have 4o structure as the single chain polypeptide. All other choices are correct.

There are many methods used to obtain energy for use in our daily lives. Some of these methods have possible environmental consequences to rivers, groundwater, and organisms. One type of pollution involves excess carbon dioxide being released into the air. Some of the carbon dioxide reacts with water to form acid rain. Which energy sources can release carbon dioxide and carbon monoxide waste into the atmosphere?

Answers

Answer: Coal,petroleum

Explanation:

he process that we call "burning" actually is chemical reactions with oxygen in the air. For the most part, the carbon combines with oxygen to form carbon dioxide (CO2), and the hydrogen combines with oxygen to form water vapor (H20).

Some  of the carbon dioxide reacts with water to form acid rain, and the energy sources can release carbon dioxide and carbon monoxide waste into the atmosphere through the burning of fossil fuels, coal, oil, etc.

What is the significance of burning fossil fuels?

Carbon dioxide, which is also considered a "greenhouse gas," and other greenhouse gases in the atmosphere trap heat from the sun but never let the heat pass through the earth's atmosphere and make the earth hot. This is caused by the combustion of fossil fuels and causes air pollution, which can be harmful to human health and the earth.

Hence, some of the carbon dioxide reacts with water to form acid rain, and the energy sources can release carbon dioxide and carbon monoxide waste into the atmosphere through the burning of fossil fuels, coal, oil, etc.

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What is the correct order for respiration?

A. Krebs cycle, electron transport chain, glycolysis
B. Glycolysis, electron transport chain, Krebs cycle
C. Glycolysis, Krebs cycle, electron transport chain
D. Krebs cycle, glycolysis, electron transport chain

Answers

Answer:

Its  C :)

Explanation:

The correct order of cellular respiration is Glycolysis > Krebs cycle > electron transport chain, hence option C is correct.

What is cellular respiration?

It is the cellular process through which cells get oxygen inside it and release carbon dioxide outside of it.

Cellular respiration is the metabolic process that starts with the degradation of metabolic products and ends with the complete oxidation of these products.

Glucose is oxidized via glycolysis and produces pyruvate as an end product of glycolysis, this pyruvate is further oxidized into the Krebs cycle and releases electrons for the synthesis of ATP.

Therefore, for correct order of cellular respiration inside the cell option C, Glycolysis, Krebs cycle, electron transport chain is correct.

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