Answer:
true
Explanation:
Doctors (or scientists) usually use this to make sure people aren't lying about the experience.
For example, some people might expect that if they take ibuprofen or Tylenol, they won't feel as much pain, so they might make themselves believe that they aren't feeling said pain. If you use a placebo group, you are less likely to have situations like that occur, and so your data becomes more accurate.
12. Cows digest proteins into smaller molecules called peptides through the use of an enzyme called pepsin.
Aqueous solutions taken from the contents of a cow's stomach are found to have many more hydrogen ions
(H+) than hydroxide ions (OH-). A veterinarian is attempting to conduct an experiment that mimics protein
digestion and has the following four test tubes set up. Which would you expect to have the greatest
concentration of peptides?
(A) Test tube 1: protein and pepsin in water at pH 1.4
(B) Test tube 2: protein and pepsin in water at pH 8.2
(C) Test tube 3: protein in water at pH 7.6
(D) Test tube 4: pepsin in water at pH 1.7
1. What happens when matter changes state?
a. Its chemical properties change.
b. Its physical properties change.
c. The energy of its particles remains the same. hape
d. two of the above
Answer:
Matter either loses or absorbs energy when it changes from one state to another. For example, when matter changes from a liquid to a solid, it loses energy. The opposite happens when matter changes from a solid to a liquid. For a solid to change to a liquid, matter must absorb energy from its surroundings.
Answer:
d.
Explanation:
Its chemical and physical properties changes as a result of a change in temperature (increase or decrease in temperature).
PLEASE HELP ASAP ILL GIVE YOU BRAINLEST
explain what density is. How is it different from weight and mass?
Hey there! I'm happy to help!
Density is how much mass there is per amount of space. The formula for it is mass divided by the volume. How much mass is there per (per means divide) amount of space?
Think of it like a room in a house. If the room only has one person, it isn't going to be very dense with people because there is only one person in the entire room. If there were 100 people, it would be very crowded in that room and the whole room would weigh a lot more. If we make our room the size of a huge convention hall though, 100 people wouldn't make it very crowded,. and it would be less dense. So the amount of people (mass) and the size of the room (volume) affect density.
In that sense, density is kind of like how crowded a thing is.
A hollow watermelon has less density than one that isn't because a watermelon that isn't hollow has more substance inside of it (more mass).
Mass is a factor of density because it measures how much of something there is. It can be related to the people in the room.
Weight is mass but with gravitational influence. A watermelon in space is going to weigh less than a watermelon on Earth because in space there is no gravity and it is floating around, but it will still have the same density just like our room full of people would still be crowded even if the people weighed nothing and were floating around.
On Earth though, we measure mass with terms like pounds, kilograms, etc. We use the term mass over weight because it is more scientifically accurate when calculating density.
Have a wonderful day and keep on learning! :D
The study and manipulation of DNA on a molecular level is known as
A biochemistry.
B genomes.
C molecular genetics.
D evolution.
Answer:
It is known as molecular genetics
Answer:
C. The study and manipulation of DNA on a molecular level is known as molecular genetics..
I have a few biology questions!
2. What statement about crossing-over is true?
a. The genetic variability of the off spring is reduced.
b. It occurs during meiosis.
c. Genes located far apart on a chromosome are less likely to be separated.
d. It occurs between chromosomes that are NOT homologous.
4. The lac genes are turned off when
a. lactose is present.
b. RNA polymerase binds to the promoter.
c. the repressor binds to the operator.
d. RNA polymerase binds to the repressor.
10. Which of the following is NOT a factor that affects photosynthesis?
a. temperature
b. water availability
c. light intensity
d. heterotroph availability
12. In the Krebs cycle, pyruvic acid is
a. generated so that glycolysis can continue.
b. broken down into carbon dioxide.
c. used to convert ATP into ADP.
d. broken down into glucose.
Answer:
2)a
4)a
10)d
12)b
can someone plz help me
Answer:
ITS A
Explanation: BC I IS
Isabel is researching the effects of deforestation using online sources. She finds an environmental study on the relationship between deforestation and local weather.
Which of the following characteristics should this study have in order for its results to be considered valid?
1. Empirical observations
11. Evidence that can be replicated
III. Outcomes that don't change with new experimentation
OI and 11
O II and III
O I and III
O I only
Answer:
ll and lll
Explanation:
I did the math
The characteristics that the study have in order for its results to be considered valid are:
Empirical observationsOutcomes that don't change with new experimentation.Since Isabel is carrying out research and found an environmental study on the relationship between deforestation and local weather, it's important that the material should be valid in order to be accepted.
Therefore, to be valid, it should have the feature of an empirical observations and the outcomes should not change with new experimentation.
Empirical observations simply means the observations that are derived from experiments or based on experience.
In conclusion, the correct option is C.
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Cell theory applies to...
A. only cells that have cell walls.
B. all cells.
C. only to prokaryotic cells.
Answer:
a only cells that have cell walls
Explanation:
Have a good day
sound travels to your eardrum by way of the------?
Answer:
el conducto auditivo
Explanation:
Answer:
External auditory canal
apakah satu-satunya bahan yang wujud secara semula jadi dalam ketiga-tiga keadaan jirim?
Answer:
air
Explanation:
air boleh wujud dalam keadaan gas iaitu wap air, keadaan cecair iaitu air dan pepejal iaitu ais
Which methods were used by the eastern woodland native Americans to acquire food?
A: bows and arrows, fishing, farming
b: men farmed, children gathered
c: trapping, trading, and using guns
d: women built traps and fashioned weapons
Answer:
if you believe in me a random stranger it is A
Explanation:
just cause Trust
Why do minerals that have the nonsilicate crystalline structure called closest packing have high density?
Answer:
The native elements of a nonsilicate crystal have very high densities because their crystal structures are based on the packing of atoms as close together as possible.
what method did jesus use to lead the rabbis to a clearer understanding of God's plan?
Jesus used the parables to lead the rabbis to a clearer understanding of God's plan.
In christian religion, Jesus used a method of teaching called parables to expatiate a most topics he handled. This was for the better understanding of God's plans.
The parables are defined as the short stories that demonstrates a moral lesson.
A typical example of a parable used by Jesus is the parable of the lost coin.
Here Jesus told a story of a woman that had ten coins and lost one of them. He said that the woman searched carefully until she finds it. she went ahead to call her neighbors to rejoice with her as she has found the lost coin.
In this parable, Jesus passed a clearer understanding of God's plan for a repented sinner. HE said that there is rejoicing in the presence of God over one sinner who repents.
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do fertilizer also increase the number of bacteria as they do for plants, or do they increase when the decomposition of plants occur?
Answer:
my views
Explanation:
bacteria helps in the decomposition of wastes ,and after the decomposition of waste material by bacteria it leads to the creation of nitrogen's oxides and this nitrogen's oxides works as fertilizer which leads to the good crops and we don't need of any chemicals' made fertilizer
Answer:
Farmers can add nitrogen fertilizer to produce better crops, but too much can hurt plants and animals, and pollute our aquatic systems.
Explanation:
explain how enzymes catalyst chemical reactions.
Answer:
Enzymes lower the activation energy of a reaction so it can happen more quickly.
Explanation:
What is the benefit to doing epidemiological studies?
A.) Patients do not have to unwillingly be exposed to harmful substances
B.) Patients are never exposed to harmful substances
Answer:
bbbbbbbbbbbbbbbbbbbbbbbbbbbb
the wight of a child taken over the first 18 years of their life by a type of
Answer:
what subject is this and do we need an equation for it
Explanation:
Exosperm is the food storage tissue in an anthophyte seed that supports development of the growing embryo.
Please select the best answer from the choices provided
OT
OF
Answer:
the answer of this questions is ot
Explanation:
the answer is anove
what is the method of transport used by single celled animals and small, thin aquatic animal
Answer:
Most animals and plants consist of different types of cells organised as tissues, organs and systems. The human respiratory system is a body system adapted for efficient gas exchange.
hope it helps mark me as brainliest please
Explanation:
Which age structure is most likely for a population that has not completed the demographic transition?
a. 50 percent of people below age 15
b. 15 percent of people below age 15
c. 5 percent of people aged 10–14
d. 10 percent of people aged 50–54
Sustancia formada por dos átomos de hidrógeno en la asados por uno de oxígeno
Answer:
El agua es una molécula simple, se produce cuando un par de átomos de hidrógeno y uno de oxígeno quedan atrapados juntos.
pllllllllllllllzzzzzzzzzzzzzzzzz help
Answer:
independent variable
Explanation:
control is what stays the same and dependent is the results from the changes made not sure if im 100% correct
How should you test a hypothesis
Decomposers in the forest come in many different shapes and sizes. Shelf fungus is a
fungus that grows on the sides of trees. It grows into the tree and decomposes it slowly.
Have you ever been walking through the woods and come across a dead log that falls
apart and is full of dirt? That is because decomposers have been eating and digesting
that log for several years, turning it into dirt that is wonderful for plants.
a) What process is taking place as wood turns into dirt?
b) Decomposers are the cleaning agents of the environment. Justify the statement
c) What is the energy source for producers?
fast pls
Answer:
b no
Explanation:
cause decomposers are those who decyed
why water essential to complete the life cycle of a mosquitoes?
Explanation:
Water provides a safety net for mosquitoes to move into developmental periods and grow. In the egg stage, the female lays roughly 300 eggs that float atop the water's surface. This is why it is so important to eliminate any standing water around your property.
10. Which of these statements is correct about the circulatory system?
It transports hormones
Capillaries have thicker walls than veins Systemic circulation carries blood to and from the lungs
All are true
Answer:
all are true mark brainleast plz pleaseQuestion 3.A statement in the introduction read, “All other factors remained the same between the two groups.” Make a list of factors that must remain constant in the experiment.
4. Referring to question 3, why is it essential that these factors be kept constant?
The factors that must remain constant in the experiment are:
TemperatureRelative humidityLight intensityUsually in an experiment, the factor that is remained the same or are kept constant through out the period of the experiment are called the controlled variables or controlled factors.
Examples of such factors include:
TemperatureRelative humidityLight intensityTake for example, in an experiment to test for the effect of different fertilizers on the growth of a plant, the temperature, relative humidity and light intensity should be kept constant.
The temperature, relative humidity and light intensity here are the external factors that affects the outcome of an experiment and must be kept constant.
That is why is it essential that these factors be kept constant.
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(02.01 LC)
Which of the following is a risk for someone who chooses to abuse drugs?
O Increased risk of an accident while driving under the influence
Decreased risk of developing lung disease and some kinds of cancer
O Reduced chance of developing mental health disorders
O Reduced possibility of contracting sexually transmitted diseases
Question 20 Multiple Choice Worth 5 points)
(02.01 LC)
A person who chooses to take drugs has an increased risk of accidents from driving, hence option A is correct.
What is drug abuse?Overuse of alcohol, painkillers, or illicit narcotics. It could cause injury to one's body, relationships, or emotions. Drug addiction is a sickness that drives people to consume substances compulsively in spite of negative effects.
Abuse of drugs can lead to seizures, strokes, brain damage, lung illness, issues with memory, concentration, and decision-making, as well as rises in body temperature.
Additional signs and symptoms include a rapid pulse, dilated pupils, raised blood pressure, nausea or vomiting, and dilated pupils, in additional behavioral changes including agitation and poor judgment.
Therefore, increased risk of an accident while driving under the influence, hence option A is correct.
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pls answer this guys
Answer:
D.None of the Above
Explanation:
Hope it helps you
What kind of life forms were found in the blood falls and what kind of environment did they thrive in?
Answer:
Most autotrophs—organisms able to produce their own energy—are photosynthetic: They require sunlight and oxygen. The extremophiles of Blood Falls, however, do not use photosynthesis. They use a more unusual process called chemosynthesis. Chemosynthetic organisms are able to convert sulfur and iron compounds (not sunlight and oxygen) into energy. As Blood Falls’ chemosynthetic bacteria extract iron from the rocks they come in contact with, they gradually erode the bedrock around the lake.
Explanation: