Answer:
Biologists and other scientists use the scientific method to ask questions about the natural world. The scientific method begins with an observation, which leads the scientist to ask a question. She or he then comes up with a hypothesis, a testable explanation that addresses the question.
A hypothesis isn't necessarily right. Instead, it's a "best guess," and the scientist must test it to see if it's actually correct. Scientists test hypotheses by making predictions: if hypothesis \text XXstart text, X, end text is right, then \text YYstart text, Y, end text should be true. Then, they do experiments or make observations to see if the predictions are correct. If they are, the hypothesis is supported. If they aren't, it may be time for a new hypothesis.
How are hypotheses tested?
When possible, scientists test their hypotheses using controlled experiments. A controlled experiment is a scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant. We'll look closely at controlled experiments in the next section.
In some cases, there is no good way to test a hypothesis using a controlled experiment (for practical or ethical reasons). In that case, a scientist may test a hypothesis by making predictions about patterns that should be seen in nature if the hypothesis is correct. Then, she or he can collect data to see if the pattern is actually there.
Controlled experiments
What are the key ingredients of a controlled experiment? To illustrate, let's consider a simple (even silly) example.
Suppose I decide to grow bean sprouts in my kitchen, near the window. I put bean seeds in a pot with soil, set them on the windowsill, and wait for them to sprout. However, after several weeks, I have no sprouts. Why not? Well...it turns out I forgot to water the seeds. So, I hypothesize that they didn't sprout due to lack of water.
To test my hypothesis, I do a controlled experiment. In this experiment, I set up two identical pots. Both contain ten bean seeds planted in the same type of soil, and both are placed in the same window. In fact, there is only one thing that I do differently to the two pots:
One pot of seeds gets watered every afternoon.
The other pot of seeds doesn't get any water at all.
After a week, nine out of ten seeds in the watered pot have sprouted, while none of the seeds in the dry pot have sprouted. It looks like the "seeds need water" hypothesis is probably correct!
Let's see how this simple example illustrates the parts of a controlled experiment.
Explanation:
Chromosomes are visible within cells during mitosis.
O True
O False
During most of the cell cycle, inter-phase, the chromosomes are somewhat less condensed and are not visible as individual objects under the light microscope. However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells.
so true?
Janelle thinks that genetic engineering could be used to
make a larger fruit rather than cloning the fruit. Which would best support her point of view? A. Genetic engineering does not cost as much.
B. Genetic engineering does not result in genetically identical organisms. C. Genetically engineered foods never cause allergies in people. D. Genetically engineered foods have not been modified.
Genetic engineering is the process by which scientists choose a particular group of genes and insert them into an organism in such a way that the resulting features will be beneficial to the organism. Therefore, option (B) is correct.
What is genetic engineering?The modification and manipulation of an organism's genes through technology is known as genetic engineering, often referred to as genetic modification or genetic manipulation.
Genetic engineering, often known as genetic alteration, is a technique that modifies an organism's DNA using technology developed in labs. This could entail altering a single base pair (A-T or C-G), erasing a section of DNA, or incorporating new DNA. Therefore, option (B) is correct.
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Answer:b
Explanation:
Environmental scientists collect air samples so they can test the quality of the air. They start with rigid metal containers that are completely empty the air has been popped out of them. What happens to the pressure inside the container and the volume of the container as air enters it?
Answer:
The air popped out of the empty rigid metal containers because the pressure inside the container is high.
This is so because as air enters the container it tries to spread out and its volume increases as particles started occupying the empty space. With the occupying volume of particles, the air particles move faster and hit the container harder that increases the pressure inside the container, and air-popped out.
The word comet comes from the greek word kometes, meaning "long hair". Why do you think this word is used?
Answer:
Its because when you see a comet falling in the night sky, most of the time, you see a long white streak right behind it.
Answer:
Porque un cometa tiene un núcleo y un rastro luminoso de gases que parece una cola
Explanation:
Peter wants to figure out which insects have 4 legs, 6 legs, and 8 legs. He decides to do this by
A.
collecting several types of insects and counting the number of legs.
B.
making a model of an insect and counting the number of legs.
C.
trying to remember how many legs each type of insect has.
D.
performing experiments on several types of insect legs.
Answer:
A
Explanation:
All the other answers are based on memory or a single leg.
Two identical twins live in the same city; one smokes and one doesn’t. The one who smokes develops lung cancer. What is the best reason for this?
A.
mostly genetics factors
B.
genetics and environmental factors
C.
mostly environmental factors
D.
it was not related to their genetics or environment
Work divided by time is the formula for- (W = T)
O Force
Work
Power
Energy
Answer:
Power
Explanation:
The formula work divided by time is the expression for finding the power consumed or expended by a body.
Power is defined as the rate at which work is done.
Power = [tex]\frac{work done}{time taken}[/tex]
The unit is always expressed in watts and symbolized as W
Work done is force applied to move a body through a certain distance.
Organisms, such as animals, can be organized by their smaller components. An animal, such as a dog, can be described by its smaller units.
In this case, the dog is the organism, which is made up of organ systems such as the nervous system. The nervous system is made up of organs such as the brain.
Describe the last three units of organization left in the dog from largest to smallest and be sure to give an example of each.
Answer:
Naming system that gives each organism a two-word name. ... the first system of classification. Aristotle. Branch of biology that groups and names organisms. taxonomy. Designed a system of classifying organisms based on their physical and structural similarities ... Mountain lion and the domestic dog. The are similar because their
They must identify traits that are common to all animals as well as traits that can be used to distinguish among related groups of animals. The animal classification system characterizes animals based on their anatomy, morphology, evolutionary history, features of embryological development, and genetic makeup.
Explanation:
The last three units of organization left in the dog from largest to smallest are as follows:
Organs < Tissues < Cells. What are the units of organization in living animals?The units of organization in living organisms can be initiated with the cell. This is because a cell is the basic structural and functional unit of life. And all organisms are composed of cells.
The cluster of cells togetherly forms tissue in order to play the same function. The arrangement of tissues gives rise to organs. Examples of cells include smooth muscle cells, nerve cells, etc. Examples of tissues are connective tissues, muscle tissue, nervous tissues, etc.
While examples of organs include the stomach, liver, blood vessels, muzzle, kidneys, etc.
Therefore, the last three units of organization left in the dog from largest to smallest are Organs < Tissues < Cells.
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Why is cooperative binding of hemoglobin adaptive?
Which of these best describes the change in population of a country where
the total fertility rate exceeds the replacement fertility rate, without
considering immigration rate, emigration rate, or death rate?
Answer:
Rising
Explanation:
Picture proof
Clay 30%, Silt 60%, Sand 10%
What would it be classified as?
What reasons do people have for protecting the environment?
can someone please help me figure this out! due in 10 mins!! 20 POINTS!!!!
How many milliliters of water would be needed to fill a one liter glass jar?
100
10,000
1,000
10
Answer:
1,000
Explanation:
Can someone help me write a short speech for this? I’ll give brainliest
Answer:
I sure hope this helps you!
Explanation:
Flying through the air I feel in need of food. Down under me is a beautiful ocean. On that oceans surface, there are lots of phytoplankton. Enough for me, enough for my family. This phytoplankton down under me has lived its life, eaten other organisms, and those organisms eat organisms. Now, is my turn. Tis the circle of life, they eat, I eat. Someday, something will eat me. Eating is very important to the living kind. It helps us stay healthy and alive. This, is my story of The Importance of Upwelling.
help ASAP please don’t understand
Use the diagram to answer the question. Between which parts of the molecule must the bonds be broken to form an ADP molecule?
The parts of the molecule whose bond must be broken to form an ADP molecule would be between C and D. Thus, option A would be correct.
The image is an illustration of the structure of ATP, Adenosine Triphosphate. The hydrolysis of the terminal phosphoanhydridic bond in ATP yields energy for metabolic reactions in biological systems and ADP (Adenosine Diphosphate) is formed as a result.
In this case, the terminal phosphoanhydridic is D. Thus, the bond between D and C must be broken for ADP to result.
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There are ________________________ amendments to the Constitution.
Answer:
27 amendments as of 2020
Explanation:
Hope i helped!
why does an ecosystem have a carrying capacity?
in a flower sperm is made by the filament pistil ovary or anther
Answer:
It is the anther.
Explanation:
The anther is comparable to the make testis. These give rise tomale sperm cells.
H
E
L
P
A
S
A
P
Which is a nonrenewable resource?
soil
fish
wood
coal
Answer:
fish
Explanation:
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What is the relationship between global warming and global climate change?
Answer:Global warming” refers to the rise in global temperatures due mainly to the increasing concentrations of greenhouse gases in the atmosphere. “Climate change” refers to the increasing changes in the measures of climate over a long period of time – including precipitation, temperature, and wind patterns.
Explanation:
According to the article, which best describes Nikki’s life before she experienced cyberbullying? She was somewhat socially awkward. She was active on many social media sites. She was successful and involved in many activities. She was more interested in academics than friendships.
The statement which best describes Nikki’s life before she experienced cyberbullying is that she was successful and involved in many activities. Thus, the correct option for this question is C.
What is Cyberbullying?Cyberbullying may be defined as a kind of bullying or harassment that is significantly done or provoked by electronic means. It typically includes sending, posting, or sharing negative, harmful, false, or mean content about someone else.
Cyberbullying can include sharing personal or private information about someone else causing embarrassment or humiliation. Some cyberbullying crosses the line into unlawful or criminal behavior. According to the article, Nikki was successful and involved in many activities that utilize electronic gadgets and components.
Therefore, the statement which best describes Nikki’s life before she experienced cyberbullying is that she was successful and involved in many activities. Thus, the correct option for this question is C.
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Which sentence uses a verb in the active voice?
A. Speed bumps were installed on our road by the Public Works Department because there had been several accidents due to speeding.
B. Detectives investigated the disappearance of five bicycles from the bike racks.
C. A get-together was planned for our neighborhood because few people know each other.
D. The softball game was filmed and broadcast by the local television station.
Answer:
B. Detectives
Explanation:
Ive done the quiz
The sentence which uses a verb in the active voice is "Detectives investigated the disappearance of five bicycles from the bike racks". Thus, the correct option is B.
What is active voice?An active verb is when the verb is clearly the subject in the sentence, or 'the doer,' of the sentence. Active verb is a word which basically shows an action within the sentence itself. Active verb sentences are used more frequently and are more engaging and can help in better writing, whereas the passive voice can be used when emphasize the object rather than the subject of the sentence.
The examples of active voice of verb include the sentence "Detectives investigated the disappearance of five bicycles from the bike racks", this sentence uses a verb in the active voice as the subject Detectives are performing the action described by the verb investigated.
Therefore, the correct option is B.
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A scientist finds that a sample of matter contains three types of atoms. The sample can be any of the following, except:
A. compound
B. molecule
C. element
D. mixture
Answer:
D. mixture
Explanation:
because the mixture is not part of an atom
As per the given scenario, the sample can be any of the following, except element. The correct option is C.
What is an element?A substance that is unable to broken down chemically into smaller molecules.
An element is made up of atoms with the same atomic number, which means that each atom possesses the same count of protons in its nucleus as the other atoms in the element.
A chemical compound is a chemical substance made up of many identical molecules made up of atoms from multiple elements that are held together by chemical bonds.
A molecule made up of only one element's atoms is thus not a compound.
A scientist discovers three types of atoms in a sample of matter. Except for elements, the sample can be any of the compound, molecule or mixture.
Thus, the correct option is C.
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True or False: If a planet were to stop moving relative to the sun, gravity would draw that planet into the sun.
Answer:
True
Explanation:
Even though sunlight looks white, what is it really made up of?
Answer:
White light means your not missing any of the visible color spectrum, so all the colors.
Explanation:
What is one of the causes of mechanical weathering? A. acid rain B. oxidation C. animal actions D. carbon dioxide
Answer:
animal actions so its c
Explanation:
What is the difference between near surface ozone and high altitude ozone?
The difference between near-surface ozone and high altitude ozone is that high altitude ozone is adequate ozone as it is a UV shield and the surface zone is destructive ozone as it is harmful to life forms.
What are the major reasons responsible for ozone depletion?The major reasons for ozone depletion include the excessive accumulation of greenhouse gases, CFCs, propellents, manufactured chemicals, etc.
High altitude ozone is found at the topmost height in the region of the stratosphere, while surface ozone is found just above the troposphere.
Therefore, it is well described above.
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hiiiiiiiii!!!!!!!! ______-_-
Answer:
haiiiiiiiiiii :) :) :)
Answer:
.
Explanation: