Why is it important to have a control group?

Why is it important to control certain variables?​

Answers

Answer 1
1.A control group is important to an experiment because it allows you to eliminate and isolate those variables.
2. Controlling variables is important because slight variations to the experiment set up could affect the outcome significantly

Hope this helps :)

Related Questions

What is a Constant? In a scientific form

Answers

Answer:

The part that does NOT change during an experiment.

Explanation:

Because that's what a constant is. I think this is what you meant by this question.

Answer:

the scientific defintion of a constant is a part of an experiment that remains the same throuout everything

Explanation:

hope this helps

Which value represents a population density? A. 3,000 fish in a certain lake B. 1,500 shrimp per cubic meter of sea water C. 1,300 shrimp in a certain ocean D. 500 adult crabs along the entire intertidal zone

Answers

Answer: D. 500 adult crabs along the entire intertidal zone

Explanation:

Answer:

D. 500 adult crabs along the entire intertidal zone

Explanation:

HELP ME PLEASE!! THIS IS A TEST!!! PLEASE!!!

Stuart is listing the changes to matter and energy that occur during the process of photosynthesis which of these examples should he include in his list?

A.) changes in chemical energy converts carbohydrates into smaller molecules
B.) changes in light energy convert chemical energy stored in carbohydrates
C.) changes that convert chemical energy into heat and light
D.) changes in nuclear energy converts hydrogen and oxygen into carbon
PLEASE AND THANK YOU!!!! HELP MEEE!!!​

Answers

the answer would be C. None of the other answers choices have anything to do with photosynthesis

Which two scientists proposed an atomic model with a nucleas

Answers

Answer:

Thomson and Rutherford

Explanation:

Answer:

Rutherford and Bohr

Explanation:

A specific type of cell is being studied by a scientist. She notices the cell contains a nucleus, lysosomes, a cell membrane and cell wall. What is the correct classification of this cell?

A prokaryotic animal cell

B. A prokaryotic plant cell

C. A eukaryotic animal cell

D. A eukaryotic plant cell

Answers

Answer:

it would be answer c

Explanation:

A eukaryotic plant cell is the correct classification of this cell. So, the correct option is D.

What is a Eukaryotic cell?

A eukaryotic cell is defined as the type of cell that has a true nucleus, and other organelles are well defined and enclosed in a membrane that has a large and complex cell that distinguishes them from prokaryotes.

This is the cell with a true and well-defined nucleus, lysosomes, cell membrane, and a cell wall is a characteristic of a plant cell because they are enclosed in a cell wall, unlike animal cells. Eukaryotic cells are found in animals and plants, while bacteria and archaea have prokaryotic cells.  

Therefore, a eukaryotic plant cell is the correct classification of this cell. So, the correct option is D.

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What happens in Interphase?
a. The cell grows & replicates DNA
b. The cell splits in two
c. The chromosomes move to the middle
d. The cell starts to cleave

Answers

Answer:

A, Cell grows and replicates DNA

Explanation:

you can also just look this one up on googlo

What are the components of a multicellular organism?

Answers

Answer:

Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions. In humans, cells differentiate early in development to become nerve cells, skin cells, muscle cells, blood cells, and other types of cells.

Answer:

Because the first multicellular organisms were simple, soft organisms lacking bone, shell or other hard body parts.

A DNA sequence is shown.

AAT - CGA - GGT

Which sequences show the result of a deletion mutation in the DNA? Check all that apply.

1.CAA - TCG - AGG - T
2.CAT - CGA - GGT
3.AAT - CAG - GT
4.AAT - CGA - GGT
5.AAT - CGA - GT
i think theres 2-3 answers

Answers

TAC CCA GGG

ATG GGT CCC

TAC CCA GG

ATG GGT CC

Answer:

C - ATT - CAG - GT

and E - AAT - CGA - GT

Explanation:

Deletion. Its right in the name. Deletion is when a part of the DNA is removed. If you look, you see the DNA is AAT - CGA - GGT, but in C and E, theres DNA removed. Hope this helps! Have a wonderful day! :3

6. One of the main functions of the semi-permeable cell membrane is to maintain
homeostasis for the cell. Semi-permeable means that only some molecules are
allowed to cross the membrane and others are not.
What molecule enables large molecules to cross the membrane?
-carbohydrates
-proteins
-nuclear acids
-lipids

Answers

Answer:

proteins

Explanation:

im not sure tho, hope it helps

F. Identify these animals and write the names of their body covering.​

Answers

1.polar bear - white fur like coat
2.snail- the Gastropod shell
3.sheep-the outer coat takes the form of hair, and beneath this lies a short undercoat of fine wool that has been developed into the fleece of domesticated sheep.
4.peacock-Feathers are an epidermal growth that form the outer covering peacocks
5.Fish-The outer body of many fish is covered with scales, which are part of the fish's integumentary system.
polar bear - white fur
snail - shell
sheep - sheepskin
peacock - feathers
fish - scales

Uncle Smiley, who is heterozygous for a yellow face, married a woman with a green face. Both of them have always wanted a large family! If they were to have 12 children, how many of the 12 children would have yellow faces? How many of the 12 children would have green faces? Create a Punnett square to to help you find your answers. Hint: Yellow face is dominant to green face

Answers

Answer:

Since Yellow is dominant over green then almost all of the children will have yellow faces. The punnet square below will show what the offspring will have but my guess is

50% will have yellow faces

50% will have both yellow and green

1% will have a green face

But since Yellow is dominant over green the 50% of both colors will mostly show a yellow dominant.

I apologize if my drawing looks messy.

Hope this is correct

The cycle of the moon’s phases repeats in a predictable way. About how long does it take to cycle from one new moon to the next new moon?

C. about one day
A. about one day
D. about one month
B. about one year

Answers

C- About one month
Hope this helps

what is the reaction of dehydration

Answers

Answer:

Explanation: people get headaches, dry skin and die

How is reception different than transduction?

Answers

Answer:

Sensory transduction is the process of converting that sensory signal to an electrical signal in the sensory neuron. The process of reception is dependent on the stimuli itself, the type of receptor, receptor specificity, and the receptive field, which can vary depending on the receptor type.

Explanation:

A hurricane forms when a
gains strength over ocean waters.
O A. typhoon
B. polar storm
C. occluded front
D. tropical depression

Answers

Answer:

D.

Explanation:

it's a hurricane tropical depression is a storm that turns into a hurricane

A hurricane forms when a tropical depression gains strength over ocean waters.

It is usually accompanied by rain, thunder, and lightning, and that sometimes moves into temperate latitudes.When a hurricane approaches land, tremendous damage can occur to coastal cities and towns. Hurricanes impact natural environments along a coast too.What is tropical depression?

It is a tropical cyclone that has maximum sustained surface winds of 38mph or less.

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which statement best describe the relationship between the products of photosynthesis and the reactants in cellars respiration

Answers

Answer:

Photosynthesis products serve as a chemical energy suppliers for reactants and cellular respiration.

Since photosynthesis creates oxygen and oxygen needed for cellular respiration in the production of carbon dioxide and energy, carbon dioxide is used to generate plant energy and oxygen.

Explanation:

Photosynthesis products produce chemical energy by reacting to cellular respiration. Photosynthesis products interact to extract ATP from cells in cellular breathing reactants.

Photosynthesis products inhibit the reactants in the presence of light in cellular breathing.

every rock has been every type of rock
true or false

Answers

Answer:

false

Explanation:

because not every rock has granite in it

100 points and brainliest
Quick first to answer this. How old is sir Alex Ferguson

Answers

Answer:

78 years old

Explanation:

he's born in Dec 31 - 1941

Which statement best summarizes how human lifestyles are currently affecting the sustainability of resources on Earth?

Answers

Answer:

A reduction of carbon by half would stop the increase in global temperatures immediately and preserve the majority of resources on Earth

Explanation:

WILL GIVE BRAINLIEST!!!!!!!
A normal cell has a high concentration of potassium on the inside and a low concentration of potassium on the outside. Also, a normal cell has a low concentration of sodium on the inside and a high concentration on the outside. Yet, the net movement of potassium is into the cell and the net movement of sodium is out of the cell. What type of transport is involved?

Osmosis

Facilitated diffusion

Active transport

Diffusion

Answers

Answer:

Is there a higher concentration of potassium inside or outside the cell?

The sodium and chloride ion concentrations are lower inside the cell than outside, and the potassium concentration is greater inside the cell. These concentration differences for sodium and potassium are due to the action of a membrane active transport system which pumps sodium out of the cell and potassium into it.

Explanation:

hope it helps

What force is present at a divergent boundary?
A. Shearing
B. Torsion
C. Tension
D. Compression

Answers

Tension force is present at a divergent boundary. Therefore, option (C) is correct.

What do you mean by tension force?

Tension is defined as the force transmitted through a rope, string or wire when pulled by forces acting from opposite sides. The tension force is directed over the length of the wire and pulls energy equally on the bodies at the ends.

Tension formula is articulated as. T=mg+ma. Where, T= tension (N or kg-m/s2) g = acceleration due to gravity (9.8 m/s2)

All physical objects that are in contact can exert forces on each other. We give these contact forces different names based on the types of objects in contact. If one of the objects exerting the force happens to be a rope, string, chain, or cable we call the force tension.

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define logical operator

Answers

Answer:

logical operator is a symbol or word used to connect two or more expressions such that the value of the compound expression produced depends only on that of the original expressions and on the meaning of the operator.

Answer:

A logical operator is a symbol or word used to connect two or more expressions such that the value of the compound expression produced depends only on that of the original expressions and on the meaning of the operator. Common logical operators include AND, OR, and NOT.

Explanation:

bleh can you help? ill give brainleist to best awnser :3 (if i can)

How does cellular respiration happen?

Answer in a minumum of 5 complete sentences

Answers

Answer:

Definition : "Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products."

Simplified : Cellular respiration is used to take in food, then is used to create ATP. ATP is a chemical the cell uses for energy. This process is called aerobic respiration. The process uses oxygen, and has four stages known as  Link reaction, glycolysis, the Krebs cycle, and the electron transport chain.

You might want to re-word the simple version a little, I worded it the best I could but I used information from wiki.

When an organism can tolerate specific chemicals meant to kill it, it is said that the organism has developed a(n) ______________________ to the chemical.

Answers

Answer:

Immunity.

Explanation:

The organism has developed an immunity to the chemicals meant to kill it. An immunity allows the organism to not be effected anymore by it and survive.

Hope this is correct, have a great day!

When an organism can tolerate specific chemicals meant to kill it, it is said that the organism has developed an Immunity to the chemical.

What is meant by the term Immunity ?

Immunity pertains to an individual body’s ability to restrict the incursion of pathogens. Pathogens are foreign disease-generating substances, which includes bacteria and viruses, and humans are susceptible to them on a daily basis.

Antigens are attached to the surface of pathogens which further arouses an immune response in the body of an individual. Immune response or immunity refers to the body’s capability to defend and to fight against antigens and protect the body.

There are various types of immunity, which consists of innate immunity, passive immunity, and acquired/active immunity.\

1) Innate immunity refers to standard protection that a person is born with already acquired since birth, consisting physical barriers (skin, body hair), defense mechanisms (saliva, gastric acid), and generic immune reactions (inflammation).

2) Passive immunity refers to an individual body’s ability to resist pathogens by “borrowing” antibodies. For illustration, antibodies could be transmitted to a baby from a mother’s breast milk, or via blood products consisting antibodies like immunoglobulin that can be diffused from one person to another.

Thus, when an organism can tolerate specific chemicals meant to kill it, it is said that the organism has developed an Immunity to the chemical.

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Can a virus reproduce outside a living thing?

no

yes

Answers

Answer:

no it cannot

Explanation:

No , it can’t reproduce outside a living thing

What are things governments can do to prevent more deaths?

Answers

Answer:

Shut down the city more due to rona , put more money toward hospitals , and be at peace with the world

Explanation:

Answer:

Shut down the city more due to rona , put more money toward hospitals , and be at peace with the world

Explanation:

help me plz
its for 9th grade biology or 10th grade​

Answers

Answer:

The answer should be [tex]X^{A} Y^{A}[/tex]

Since the pedigree has two different letters, it will have one letter of each, but the DNA will still be A.

What are organelles and which type of cell has organelles? *

Answers

Answer:

An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.

eukaryotes have organelles

Answer:

membrane bound and nonmembrane bound .  Non-membrane bound organelles are ribosome and cytoskeleton whereas membrane bound organelles are nucleus and endoplasmic.

Explanation: Prokaryotic cells have organelles

Comparing Asexual and Sexual reproduction ​

Answers

Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique.

Explanation:

Which layer ground is made up of solid rock?

mantle

bedrock

subsoil

topsoil

Answers

Answer:

Bed rock .!!!!!!!!!!!!

Bedrock is made up of solid rock











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