Why do scientists use light-year instead of Astronomical Units to measure the distances between stars?

Answers

Answer 1

Answer:

well AU is only for inside a star system and the number of AU would be too high, so light years are easier its like saying ur 6 feet instead of 72 inches or in centimeters

Explanation:


Related Questions

The graph below shows the breakdown of a protein in the human stomach without a digestive enzyme.

Answers

Answer:

B

Explanation:

Take the test

The breakdown of protein in the presence of enzyme has lower activation energy.

The breakdown of protein in the stomach is achieved with the loss of peptide bonds, and the complex is broken down into amino acids.

What is breakdown of protein?

The protein is broken down in the digestion at small intestine and stomach. The graph represents the energy of the reaction with the progress of protein degradation.

The energy of the reaction is highest when the protein breakdown activation is processed. The enzyme is the catalyst, that acts in fasting the reaction with the lowering of activation energy.

Thus, the breakdown of protein in the presence of enzyme has lower activation energy.

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Which soil conservation method makes good use of herbicides, pesticides, and minimum tilling?

A)

windbreaks

B)

terracing

C)

no-till agriculture

D)

crop rotation

Answers

Explanation:

C, no-tilll agriculture......

The correct answer is C

Consider the two samples of sedimentary rock seen here.Predict which rock would be more likely to undergo physical weathering. Explain how and why.
A) Sandstone. Sandstone has more obvious layers of sediments.
B) Shale. Shale is fine grained and is more likely to dissolve in water.
C)Sandstone. Sandstone is made of large sand-like grains and is easily eroded by wind
D)Shale. Shale contains iron which is an element that easily combines with the oxygen in the atmosphere to produce rust.​

Answers

Answer:  A) Sandstone. Sandstone has more obvious layers of sediments.

Step by step explanation: As you take a look at the given pictures, you notice that (Sandstone) Is more closed off than (Shale). So whenever rain comes, rain will seep into the little openings of the rock shale has, causing it to break down.Same for strong wind, since shale isn't as compacted as Sandstorm, then shale will not last very long. Therefore making Sandstone being able to undergo more harsh conditions.

What is the image
of the point (3, 1)
translated 8 units
left and 3 units
up?

Answers

Answer:

(-5,4)

Explanation:

cuz u take 3-8 witch gives u -5 and u do 3+1 witch gives u 4

also u can take the long way and count backwards from 3

People who live in __________ are the most likely to be exposed to nitrate and phosphate pollution in surface and ground water.
A)
fishing villages
B)
rural farming areas
C)
mountainous areas with reduced oxygen levels
D)
urban industrial areas

Answers

Answer:

B) rural farming areas

Explanation:

Phosphate and Nitrate are two common pollutants that affect surface and ground water. They result mostly from the fertilizer used in farming operations. This is because fertilizer contains these nutrients to improve the fertility of the soil in which the crops are planted, however, they manage to get eroded into water bodies when it rains.

Due to that fact that most farming occurs in RURAL AREAS, people that live in rural farming areas are most likely to be affected by the effects of nitrate and phosphate pollution in their water bodies (surface and ground).

Which of the following terms would be used to indicate a patient is suffering from neuropathic pain?
sensation
paresthesia
nociception
endorphin

Answers

Answer:

sensation and paresthesia

Explanation:

Sensation and paresthesia are the terms that would indicate a patient is suffering from neuropathic pain. Sensation is concrete, conscious experience resulting from stimulation of a specific sense organ or sensory nerve, or in the brain of an individual. Paresthesia is a type of abnormal sensation of the skin (tingling, chilling and burning etc) without any apparent physical cause in the body.

explain the advantage of the synaptic cleft being so small

Answers

Answer:

The size of the synaptic cleft is small which results in the neurotransmitters to pile up over time thus making the neurotransmitters' concentration increase and therefore can proceed with their function of sending nerve impulses. Hope that helped!

Explanation:

every cell in an organism has the same number of chromosomes except
a) skin cells
b) neurons
c) white blood cells
d) reproductive cells

Answers

Every cell in an organism has the same number of chromosomes except neurons.
The answer to your question is B.) neurons

What does dna code for

Answers

Answer:

deoxyribonucleic acid.

Explanation:

DNA

Answer:

DNA is an abbreviation of deoxyribonucleic acid

Explanation:

DNA is a blend of Deoxyribose and Nucleic Acid.

I hope this helps.

Raj drinks a glass of water in his kitchen. The water is at room temperature, and Raj decides to make it colder by adding ice. Which of the following describes why the ice cubes will melt?

Answers

Answer:

Heat from the water moves into the ice.

Explanation:

The ice has more heat than the frozen ice cube, so it will melt it.

Answer please! have a great day/night

Answers

Answer:

C= gene

U too have a great day/night.

Explanation:

True or False: A hypothesis makes a prediction

Answers

Answer:

A hypothesis is a kind of guess or proposition regarding a situation. It can be called a kind of intelligent guess or prediction, and it needs to be proved using different methods. Formulating a hypothesis is an important step in experimental design, for it helps to predict things that might take place in the course of research. -or- What this statement means is that a hypothesis is a guess that a researcher in academia or other fields make and then follows an extensive research to either prove or disqualify the developed hypothesis as true or false. In contrary, a prediction is just but a guess that an individual makes without backing it with the necessary research in hope that it will happen.

Explanation:

Answer:

True

Explanation:

as a
A cell with half the number of chromosomes (n) a
2n cell.
A. exons
B. operon
C. genome
D. diploid
E. nucleosome
F. recessive
G. restriction enzyme
H. haploid
I. dominant
J. gel electrophoresis

Answers

Answer:

H. Haploid

Explanation:

A cell that contains two of each chromosome, or 2n, is a diploid.  If a cell has half of those chromosomes, or just n, it is a haploid.


Some types of bacteria can go through the process of photosynthesis.
True
False

Answers

True
Explanation:
Oxygenic photosynthetic bacteria perform photosynthesis

Explain how each of the following factors affect the rate of photosynthesis 1) temperature 2) inorganic ions

Answers

The main variables which affect photosynthesis are light, water, CO2 concentration and temperature.
On a deeper level, other factors like amount of chlorophyll, availability of nutrients (eg Mg is needed for chlorophyll synthesis) will also affect the rate of photosynthesis, though these are rarely covered in discussion of this topic.
The thing is that photosynthesis will be held back by whichever factor is in shortest supply.
As I sit in my study in England, the sun is shining brightly, but the temperature outside is only 5ºC. I suspect the rate of photosynthesis is limited by temperature today.
Yesterday was a dull day, but in the middle of the day it was not cold and I suspect there wasn't enough light for photosynthesis. If I had turned the security lights on my house on, the plants in my garden might (possibly) have photosynthesised faster.
In summer, some farmers growing crops in glasshouses actually increase the amount of carbon dioxide in the air as all their plants have plenty of water and light and the temperature is near the best possible for photosynthesis.
A good way to investigate this might be with the help of algae and you can use the 'Immobilised Algae' practical for this.
Although water is needed as a raw material for photosynthesis, don't bother trying to investigate water as a variable - plants normally wilt and wither long before water restricts photosynthesis at the biochemical level. They need water to support the plant to face the sun as well as a raw material of photosynthesis.
The simplest equation for photosynthesis:-
Carbon dioxide + water -----(in light, with chlorophyll and enzymes)----> sugar + oxygen
Temperature speeds up all chemical reactions - photosynthesis is no exception.
Enzymes work better in warm conditions (up to about 50ºC when enzymes start to be destroyed by heat).
The idea to get across is that different conditions will be most important on different occasions. This morning, my garden could do with more warmth - yesterday, it could do with more light / sun!

Which organ(s) makes hormones that are important for keeping a consistent level of sugar in the blood?
ovaries
hypothalamus
testes
pancreas

Answers

The correct answer is the pancreas

Because of a snowstorm, your regular laboratory session was cancelled and the gram staining procedure performed on cultures incubated for a longer period of time. Examination of the stained B. cereus slides revealed a great deal of color variability, ranging from an intense blue to shades of pink. Account for this result.

Answers

Answer:

Bacteria start to die, thereby changing the dye concentration in the medium and producing different colors

Explanation:

Bacillus cereus are Gram-positive, rod-shaped bacteria that form orange-pink colonies in agar media (e.g., BACARA medium, which is used for detection and enumeration of B. cereus). In this case, it is expected that after a long time without taking care of the culture, the bacteria started to die. Subsequently, lysed bacterial cells lost their dye which accumulated in some areas of the medium, thereby showing different colors ranging from an intense blue (areas with dead bacteria) to shades of pink (areas with bacteria still alive and viable).

The color of some colonies are changing bacause of long incubation due to death of bacteria.

Bacara agar medium:

It is used for detection and enumeration of B. cereus. Bacteria gives orange-pink colonies in the media.

This detection method only detects the live bacteria, but here bacteria are dieing because of lake of food in media.

Therefore, the color of some colonies are changing bacause of long incubation due to death of bacteria.

To know more about Bacara agar medium:

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5. Which describes the variable that is changed to test the prediction?
experimental
control
dependent
independent

Answers

Answer:

Independent

Explanation:

An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

In an experiment , the variable being manipulated by an experimenter is known as an independent variable while the dependent variable is the event expected to change when the independent variable is manipulated.

Hence, independent variable describes the variable that is changed to test the prediction.

6. What is the name of the repeating units that make up DNA?"
O Nitrogen Base
O Nucleotide
O Phosphate Group
O Sugar-phosphate backbone

Answers

Nucleotides would be the answer!!
The answer is Nucleotides

Based on the original data collected from the population of 1,128 birds, what fraction of the population would be expected to have the SS genotype if the population was in Hardy-Weinberg equilibrium?

A. 0.466

B. 0.534

C. 0.285

D. 0.217

Answers

Complete question:

Beak Length in Finches

In a certain population of finches, a single gene controls beak length. There are two possible alleles: S, which leads to a short beak, and s, which leads to a long beak. Individuals with the genotype SS will have a short beak, individuals with the genotype ss will have a long beak, and individuals with the genotype Ss will have a medium-length beak. Scientists measure that in this population of 1,128 total birds, 321 birds have short beaks, 562 have medium-length beaks, and 245 have long beaks.

Based on the original data collected from the population of 1,128 birds, what fraction of the population would be expected to have the SS genotype if the population was in Hardy-Weinberg equilibrium?

A. 0.466

B. 0.534

C. 0.285

D. 0.217

Answer:

The correct option is C. 0.285

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Answer:

C. 0.285

Explanation:

Just wanted to confirm the answer.

How many X chromosomes do females have?

Answers

Answer:

Typically, biologically female individuals have two X chromosomes

Explanation:

hope this helps! :)

Females have two X chromosomes, which are identical. Males have one X and one Y chromosome, which are not identical.

What landforms can be found under the ocean?

Answers

mountains or volcanos

The ability to produce surviving offspring is called

Answers

Answer:

Fecundity

Explanation:

It can also describe the reproductive rate of an individual organism.

Fecundity

Fecundity is the ability to produce offspring. It can also describe the reproductive rate of an individual organism.
Hope that helps!

a short essay explaining how an earthquake below the ocean floor can affect the seas near the earthquake area.​

Answers

Earthquakes only happen in certain areas of the world

In which symbotic relationship does one organism benefit while the other organism is harmed?

Answers

paratism is the answer

Answer:

parasitic relationship is the answer

What are the reactants and products of photosynthesis? *
glucose and oxygen are the reactants; carbon dioxide and water are the products
carbon dioxide and oxygen are the reactants; glucose and water are the products
Carbon dioxide and water are the reactants, glucose and oxygen are the products
glucose and water are the reactants, carbon dioxide and oxygen are the products

Answers

Answer:

Explanation:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

Answer:

glucose and oxygen

Explanation:

A laboratory technician was working on some blood samples she noticed that if the samples were left to stand for five minutes before placing them in the centrifuge, they could not be separated properly, as they started to solidify. Use your knowledge of the functions of the parts of blood to explain this observation please help I have 20 mins left

Answers

Answer:

ijeje9w0qj19q0qo119191911919

is scorpion are vertebrate or invertebrate​

Answers

Answer:

invertebrates

Explanation:

hope this helped:))))))))))))))

The purpose of the endocrine system is to Select one: a. extract nutrients from food to meet the body s needs for energy and eliminate solid wastes. b. move blood throughout the body to supply cells with oxygen and nutrients and remove wastes. c. produce hormones that help regulate many body functions. d. provide the oxygen needed by body cells and remove the waste product carbon dioxide.

Answers

Answer: c. produce hormones that help regulate many body functions

Explanation:

The endocrine system helps in the release of hormones and regulating them into bloodstream and these hormones that are released then travel to the cells to perform different functions like growth and development, reproduction, controlling of ones mood, metabolism etc.

Therefore, the correct option is C "produce hormones that help regulate many body functions"

Biochemists working with proteins use a diverse set of treatments to analyze protein sequences. Denaturing agents unfold proteins. Some denaturing agents are reversible, and allow the proteins to be renatured after the procedure. A strong________ solution is a common reversible denaturant. Additional treatment with____________completely denatures proteins that contain disulfide bonds.

Answers

Answer:

Ethanol2-mercaptoethanol

See explanation below

Explanation:

Biochemists working with proteins use a diverse set of treatments to analyze protein sequences. Denaturing agents unfold proteins. Some denaturing agents are reversible, and allow the proteins to be renatured after the procedure. A strong ethanol solution is a common reversible denaturant. Additional treatment with 2-mercaptoethanol completely denatures proteins that contain disulfide bonds

A strong UREA solution is a common reversible denaturant. Additional treatment with 2-mercaptoethanol completely denatures proteins that contain disulfide bonds.

Denaturing reversible agents can alter the secondary/tertiary structure of a protein without altering its primary structure.

Urea is a reversible denaturant that breaks hydrogen bonds in the secondary structure of proteins without modifying the primary structure.

2-mercaptoethanol is a denaturing agent that cleaves disulfide bonds between cysteine residues.

In conclusion, a strong UREA solution is a common reversible denaturant. Additional treatment with 2-mercaptoethanol completely denatures proteins that contain disulfide bonds.

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