Why do scientists conduct experiments?
A. To test a hypothesis.
B. To test a conclusion,
C. To explain an observation.
D. To test their results.

Answers

Answer 1

Answer:

A).

Explanation:

In the scientific method, an experiment is an empirical procedure that arbitrates competing models or hypotheses. Researchers also use experimentation to test existing theories or new hypotheses to support or disprove them.

Answer 2
The answer is A. To test a hypothesis

Related Questions

given the Dna Strand: ATG-CAG-AGA how would i transcribe the corresponding RNA Strand ?

Answers

Answer:

The RNA strand that is transcribed from the DNA strand sequence ATG-CAG-AGA is UAC-GUC-UCU, according to the complementarity of nitrogenous bases.

Explanation:

In order for DNA to RNA transcription to occur, one must be aware that:

The transcription meets the criteria of base complementarity, where a purine binds to a pyrimidine. In RNA there is no thymine, so it is replaced by uracil.  

Given a given sequence of bases the RNA resulting from transcription will be governed by these rules:

DNA: ATG-CAG-AGA

RNA: UAC-GUC-UCU

Where:

Adenine is transcribed in Uracil. Thymine (DNA) is transcribed into Adenine. Cytosine is transcribed into Guanine. Guanine is transcribed into Cytosine.

Plants participate in both short- and long-distance signaling. Explain how nerve cells show these two functions, as well. (3 points)


Nerve cells release chemical signals into synapses between them (short distance). They also transverse their lengths with an electrical signal that can result in signal travel along a series of cells (long distance).


Nerve cells release hormones into the synapses between them (short distance). These hormones can also transverse the bloodstream (long distance).


Nerve cells release neurotransmitters into gap junctions between them (short distance). They also use electrochemical gradients that can travel the length of each cell quickly, along a network of cells (long distance).


Nerve cells use plasmodesmata to communicate between them individually (short distance). They also use ion-gated channels to create an electrochemical signal that can be propagated over long distances in their network (long distance).

Answers

Answer:

Nerve cells release chemical signals into synapses between them (short distance). They also transverse their lengths with an electrical signal that can result in signal travel along a series of cells (long distance).

Explanation:

Nerve cells release neurotransmitters in the synaptic cleft which are capable of affecting nearby cells such as other nerve cells and muscle cells. Neurotransmitter molecules include, among others, serotonin, acetylcholine, dopamine, norepinephrine and histamine. Moreover, the synaptic cleft is the space that separates a neuron cell and its target cell. On the other hand, neurons transmit signals through electrical impulses. Electrical impulses travel long distances in the body carried by axons of the nerves. Thus, nerve impulses connect the brain and spinal cord and they carry signals to different parts of the body.

a cell was poisoned by a substance that destroyed all of its mitochondria. which cell transport processes would be able to still continue?​

Answers

Answer:

Nothing

Explanation:

If a cell's mitochondria were destroyed it would die. Mitochondria are the power houses of the cell and without energy, necessary reactions could not take place .

If a mitochondria stopped working the cell would not have its respiratory function such as to use carbon dioxide, water, and energy in which the cell needs to survive so the cell would eventually stop moving and slowly die out with no nutrients and energy.

a variable that stands alone and isn’t changed by the other variables you are trying to measure

Question 6 options:

independent variable


test-o-matic group


dependent variable


control group

Answers

Answer: independent variable

What do scientists use to refer to organisms because common names can create confusion? *

Answers

Answer:

Scientific Name

Explanation:

Scientists use a two-namesystem called a Binomial Naming System.

They name animals and plants using the system that describes the genus and species of the organism.

Scientists use a two-name system called a Binomial Naming System.

The increase of carbon dioxide in the atmosphere is contributing to a global rise in Earth's temperature, known as.....________ & ________ ​

Answers

Answer:

Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide

Explanation:

17. Which of the following best describes how amino acids affect the tertiary structure of a
protein?
a) The number of amino acids determines the tertiary structure of the protein.
b) The interactions of the different R-groups with other R-groups and with their environment
determine the tertiary structure of the protein.
c) The R-group of the last amino acid that is added to a growing polypeptide chain
determines the next amino acid that is added to the chain.
d) The sequence of the amino acids in the polypeptide chain determines the protein's
primary structure but has no effect on its tertiary structure.

Answers

Answer:

It is B

Explanation:

I had this question on my test last week

The tertiary structure of the protein is determined by the interactions of the different R-groups with other R-groups and with their environment in the protein (Option B).

An R-group (also called variable group) is a side chain that is attached to the α-carbon of the amino acids, the building blocks of proteins.

The linear sequence of amino acids within a protein is the primary structure of proteins.

The second structure of proteins is determined by the pattern of hydrogen bonding in the peptide backbone. The most common secondary structures of the proteins are alpha-helices and beta-sheets.

The protein tertiary structure is the 3D (tridimensional) shape of the protein, which is due to interaction among R groups of amino acids and with their environment.

The most common tertiary structures of the proteins are globular and fibrous structures.

Finally, the quaternary structure of the proteins is determined by the interaction of several protein chains or subunits.

In conclusion, the tertiary structure of the protein is determined by the interactions of the R-groups and with their environment in the protein (Option B is correct).

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which of the following statements best explains why plants wilt​

Answers

Answer:

needs more context bro

Plants wilt due to lack of water. Dehydration of the plant will cause it to collapse. They also wilt sometimes to prevent damage from high temperatures and the sun. Hope this helps.

A researcher is comparing sugar molecules that a cell takes in with amino acid molecules that the cell produces. Highlight all the statements that are true about amino acids but not true about sugars,
Always contain carbon
3. an input in glycolysis
C.typically contain nitrogen
D. can be used as an energy source
E can bond together to form proteins

Answers

Answer:

The correct statements for amino acids but not for sugars are :

C. typically contain nitrogen

E can bond together to form proteins

Explanation:

Both Sugars and amino acids always contain carbon molecules and both macromolecules can provide energy so are the source of the energy. Sugar molecule more specifically glucose molecule enters glycolysis during the cellular respiration process.

Amino acids always contain the nitrogen molecule in the structure along with carbon, oxygen, and hydrogen, there is a side chain present. Amino acids are the building blocks of the protein, peptide bonds are formed by amino acids together to make a poly peptide chain of a protein molecule.

if you answer this in a short paragraph I'll answer your newest question, give you brainliest, 5 star rating, and thanks. <3

How are precipitation and temperature different between the polar and tropical climate zones?

Answers

Answer:

Ok ill do it :D

The polar and tropical region temperature and preticaplation are different in many ways. The tropical climate temperature is warm compared to the Polar temperature The Tropical region precipitation is rain and lots of rain. The polar regions precipitation is mostly snow and hail.  These two climate zones are different because where they are located on the globe. All in all there are many differences between these two regions.

Hope this helps ;D

Explanation:

Tissue → Organ → → Organism
13. Which of the following levels of organization would accurately fill the gap in the diagram above?
A cell B molecule C organism system D population

Answers

I think it is a or ABCD I don’t

Which of the following nitrogen bases is present only in RNA and not in DNA?

Answers

Answer:

The nitrogen base uracil is only present in RNA. It replaces the Thymine used in DNA and bonds with Adenine.

Explanation:

What are the characteristics of this layer that make it the ideal layer for the Concorde to travel?

Answers

Answer:

The temperature increases with weight

Explanation:

Characteristics of the layer that make Concorde to travel is The temperature increases with weight.

How did Concorde fly so high?

Concorde fly so high because the higher it flew, the thinner the air was that it encountered. This consequently led to less drag and fuel burn.

Did the Concorde fly in the stratosphere?

Able to cruise at a near-stratospheric altitude of 60,000 feet at 1350 miles per hour, the plane cut travel times on its routes in half. But speed and altitude were not the only factors that made Concorde so remarkable.

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18.
14. In which situation is speciation MOST likely to
occur?
A. A large number of the population is exposed to
a viral infection.
B. A few members of the population develop
mutations in somatic cells.
C. A large number of the population migrates
over a great distance
D. A few members of the population are isolated
from the others.

Answers

Answer: D

Explanation:

Use Darwin’s finches as example they were separated and speciation occurred in the changed beaks

In which situation is speciation MOST likely to occur is few members of the population are isolated from the others.

What can cause speciation?

The speciation process usually occurs due to adverse conditions imposed by the environment. Briefly, two causes are attributed for the process to occur: Geographical Isolation: When lineages of a species separate from the rest of the species for environmental reasons.

In this case, a species no longer identifies with it and thus it isolates itself from its environment.

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PLEASE HELP! :(


According to the graph, what condition is best for enzyme activity?

Answers

Answer:

C

Explanation:

Highest peck in enzyme activities

During a schoolyard survey, students observe a litter of baby rabbits with brown and white offspring. Explain how it is possible for two brown furred rabbits to have a white furred offspring. Use evidence to support your answer.

Answers

Answer:

Its a recessive gene

Explanation:

It was passed down by their grandparents, or great grandparents

A proton is a very tiny particle inside an atom. The mass of the proton is estimated to be 0.00000000000000000000000167 g. What is the mass of a proton in specific notion?
A. 1.67 x 10 24 g
B. 16.7 x 10 -25 g
C. 167 x 10 -26 g
D. 1.67 x 10 -24 g

Answers

Answer:

The proton is 1.6726×10−27 kg

Answer:

1.67 x 10-24g

Explanation:

DESCRIBE THE FUNCTION OF A CELL MEMBRANE AND ITS RELATIONSHIP TO WHAT HAPPENS INSIDE A CELL

Answers

Answer:

cell membrane's main function is to act as a selectively permeable barrier to the transport of materials across it. Membrane is made up of phospholipids arranged in a bilayer fashion. The phospholipids are amphipathic in nature, that is, contain both a hydrophobic and a hydrophilic end.

Explanation:

A brown eyed person (BB) and a blue eyed person (bb) have several children. Which of these statements describe the probable eye color of their children?

1.All will have blue eyes
2.All will have brown eyes
3.Half will have brown eyes, and half will have blue eyes
4.Less than half will have brown eye

Answers

Answer:

2. B. All will have Brown Eyes

Explanation:

Brown is dominant, so all children will have Bb, brown eyes

Answer:

Im pretty sure theyll have brown eyes if not my bad

Explanation:

Describe how the process of natural selection can result in an increase in frequencies of certain traits found in a population.

Answers

An individual may carry a very beneficial genotype with a resulting phenotype that, for example, increases the ability to reproduce

Answer:

Natural Selection (Answer Below)

Explanation:

Natural Selection is the selection of a more beneficial trait. For example, if trees get covered in soot all the white beetles and butterflys are going to stand out like a sore thumb, but the beetles and butterflies that adapted and evolved now have better traits that help them hide predators. The predators have a harder time finding the now black colored butterflies and beetles due to the black soot meaning the beetles and butterflies will have a higher survivability

Exercise 4 (Module 6.9) Glycolysis is the first of three steps in cellular respiration. Review glycolysis by matching each phrase on the right with a term on the left. Some terms are used twice.
_____ 1. Compound formed between glucose and pyruvic acid
_____2. Not involved in glycolysis _____3. Fuel molecule broken down in glycolysis
_____ 4. Produced by substrate-level phosphorylation
_____5. Invested to energize glucose molecule at start of process
_____ 6. Reduced as glucose is'oxddized _____7. Glucose converted to two molecules of this
_____8. Assembled to make ATP
_____9. "Splitting of sugar"
_____10. Carries hydrogen and electrons from oxidation of glucose
A NADH
B. Pyruvic acid
C. ATP
D. NAD+
E Glucose
F. Glycolysis
G. ADP and P
H. Oxygen
I. Intermediate

Answers

Answer:

Explanation:

?????????? i don't undrssanted

Some types of yogurt are probiotic, meaning they contain active bacteria. Why would someone most likely eat probiotic yogurt?

to decrease the amount of antibiotics in the body
to increase the amount of antibiotics in the body
to decrease the amount of harmful bacteria in the body
to increase the amount of helpful bacteria in the body

Answers

Answer:

D to increase the amount of helpful bacteria in the body.

Explanation:

I did it on edge 2020 hope this helps you :)

What goes in the blank ?

Answers

Answer:

I would say the answer is cells, because you basically need cells to live

Explanation:

________ is an example of the moon's gravitational force on Earth.​

Answers

Answer:

Waves!

Explanation:

Answer: tides

Explanation:

Tides are an example of the Moon's gravitational oull on the planet of Earth. The ocean rises because the moon and elements in the core act like magents, and the water goes up.

I just don’t know the last system

Answers

Answer:

The Endocrine System

Explanation:

Because a hormonal mechanism is created by the kidneys for the maintenance of blood pressure by stabilizing blood volume.

type a paragraph summarizing cellular division and differentiation
PLS HELP!!! PROJECT DUE IN 30 MINUTES!!

Answers

Answer:

Cellular differentiation is the process in which a cell changes from one cell type to another. Usually, the cell changes to a more specialized type. ... Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and during normal cell turnover.

Answer:

Cellular differentiation is when a cell changes from one cell type to another—usually, the cell changes to a more specialized class. Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and average cell turnover.

Explanation:

IM A DIFFERENT BREED!

The nucleus _____.
A.has a net negative charge

B.contains the electrons, protons, and neutrons

C.is the center core of an atom

Answers

Answer:

C

Explanation:

Answer:

C.

Explanation:

A. is wrong because the electrons are on the outermost of the atom; that would also mean that B. is wrong. C is correct because the nucleus is, in fact, the center core of the atom.

1. Luca made the following chart for Earth's four basic movements, what needs to be correct on his chart?

Rotation Speed Revolution Speed Solar System Speed Milky Way Speed
0.3 miles/sec
18.5 miles/sec
370 miles/sec
150 miles/sec

The rotation speed and revolution speed should be switched

The revolution speed and solar system speed should be switched

The rotation speed and Milky Way speed should be switched.

The solar system speed and Milky Way speed should be switched.

Answers

Answer:

The solar system speed and Milky Way speed should be switched.

Explanation:

The speed of the Earth is with respect to how it moves around it's own axis (rotation speed), the Sun (revolution speed), solar system (solar system speed), and the milky way galaxies (milky way speed) etc.

According to this question, Luca made a chart for this Earth's four basic movements. The chart with their respective speed are as follows:

Rotation Speed - 0.3 miles/sec

Revolution Speed - 18.5 miles/sec

Solar System Speed - 370 miles/sec

Milky Way Speed - 150 miles/sec

Luca, however, made a mistake in his chart.

- The rotation speed of the Earth around its axis is correctly 0.3miles/sec

- The revolution speed of the Earth around the sun is correctly 18.5 miles/sec

- The solar system speed of the Earth i.e. around the solar system is about 150miles/hour

- The milky way speed of the Earth i.e. around local group of galaxies is about 370miles/hour.

Based on the comparison of Luca's chart and correct speed illustration, THE SOLAR SYSTEM SPEED AND MILKY WAY SPEED SHOULD BE SWITCHED.

Long lashes (L) are dominant over short eyelashes (l). Complete a Punnett Square crossing two parents that are both heterozygous for long eyelashes.

Answers

I believe the answer would be
L. l
Top- L LL, Ll,
Bottom- l Ll, ll.

For lunch, Pat had a baked potato and Erin had a hamburger with no bun. They each consumed the same amount of biomass, but from different trophic levels. In comparison to the amount of land required to produce Pat’s potato, how much land was required to produce Erin’s hamburger?
a. about 10% as much land to produce the hamburger
b. about the same amount of land to produce the hamburger and the potato
c. about 10 times as much land to produce the hamburger

Answers

I think the answer is B

The land was required to produce Erin’s hamburger is about the same amount of land to produce the hamburger and the potato. Option B. This is further explained below.

What is land production?

Generally,  land natural resource required to generate commodities and services is included.

In conclusion,  we see that It takes roughly the same amount of land to produce a hamburger as a potato.

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