Answer:
The first colorimeter is reliable but not valid
The second colorimeter is valid and reliable
A chemical analysis of the colored solution was done. The readings of the first colorimeter are not the actual readings while the second colorimeter gives the readings same as the actual readings. So statements A and B are the implications of the readings.
What is a colorimeter?Colorimeter is a device that is used to measure the ability of a colored solution to transmit light through it. The concentration of the light-absorbing solute is determined using the colorimeter. When a light beam passes through a colored solution, some part of the incident light is reflected back, some part is absorbed into the solution while some part is transmitted. The colorimeter is sensitive to light and it measures the amount of light that is transmitted and absorbed by the solution.
The colorimeter is based on the principle of absorption of a certain light wavelength by the colored compounds present in the solution.
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Any change in plant communities over time is called
Answer:
ECOLOGICAL SUCCESSION
A change in plant communities over time is called succession, which is an important concept in ecology. Succession can be categorized into primary and secondary.
Explanation:Any change in plant communities over time is called succession. This is a significant concept in ecology which describes how the structure of a biological community evolves over time. Succession can be primary or secondary. Primary succession occurs in an area that has never previously been colonized by life, like a new volcanic island, while secondary succession happens in areas where a community previously existed but was removed or disturbed, such as after a forest fire.
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Which gases each make up less than 1 percent of Earth's atmosphere? Check all that apply.
argon
oxygen
nitrogen
water vapor
carbon dioxide
Answer: a.argon ,d.water vapor, e.carbon dioxide .........on edge:)
Explanation:
Changing the number of
_would change an atom into an atom of a different element.
Answer: protons
Explanation:
Changing the number of protons would change it into an atom of a different element.
Hello! Your answer is protons.
There are three main parts of any atom. The proton, neutron, and electron. The proton and neutron form the center of the atom, or the nucleus, while the electrons float around them.
The protons determine the element. The number of protons is the atom's atomic number. For example, if there were 6 protons, the element would be the one with an atomic number of 6, or carbon. If there was just one, it would be hydrogen as that has an atomic number of 1.
When you change the number of neutrons, you get isotopes. This changes the atomic mass, as neutrons' main impact is mass. This also can mainly change stability. When you change the number of electrons, you change the charge of an atom. Electrons' main purpose is to bond + charge the atom. Electrons don't weigh much, they barely weigh anything. They instead give a negative charge to an atom (while the proton gives a positive)
Hope this helps!
3. Looking at some pond water under the microscope, you notice an unfamiliar rod-
shaped cell about 200 mm long. Knowing that some exceptional bacteria can be as
big as this or even bigger, you wonder whether your cell is a bacterium or a
eukaryote. how will you decide? if it is not a eukaryote, how will you discover
whether it is a bacterium or an archaeon? [20]
Answer:
1. The cells of eucaryotes are characterized by the presence of a nucleus and membrane-bound organelles. Bacteria, on the other hand, do not possess a nucleus or membrane-bound organelles.
2. As bacterial cell walls are made of peptidoglycan (protein and sugars), and archaeal cell walls are composed of polysaccharides (sugars). I would add a lysis solution that separates the cell wall and integral molecules. Then, I could use High-performance liquid chromatography to quantify the chemical composition differences of both walls.
Explanation:
1. The cells of eucaryotes are characterized by the presence of a nucleus and membrane-bound organelles. Bacteria, on the other hand, do not possess a nucleus or membrane-bound organelles.
2. Both archaea and bacterial cells lack membrane-bound organelles and nucleus, but they both possess a cell wall. Therefore, if I realize that the cell is definitely a prokaryote and not a eukaryote, then, to determine if it is from an archaeon or bacterium, I would analyze the integrity of their cell walls as bacterial cell walls are made of peptidoglycan (protein and sugars), whereas archaeal cell walls are composed of polysaccharides (sugars).
I could add a lysis solution that separates the cell wall and integral molecules. Then, I could use High-performance liquid chromatography to quantify the chemical composition differences of both walls.
Also, the majority of archaea cannot be cultured within the laboratory setting. So that could also work as another method, except it wouldn't be as reliable as the others.
What are methods of combating toxic pesticides?
Answer: -Buy organic and locally grown fruit and vegetables.
- Wash fruits and vegetables before eating.
- Use non-toxic methods for controlling insects in the home and garden.
Explanation: Doing the following will help eliminate toxic pesticides because in season fruits and veggies from your local market is the best assurance of pesticide-free produce.
Answer:
Pesticides are usually used to kill or control the growth of pests.
Pesticides can be toxic and can cause several health effects such as respiratory problems to cancer.
There are several methods combating toxic pesticides as mentioned below:
1) People should use non-toxic methods for the purpose of controlling pests in agricultural practices.
2) All fruits and vegetables are should be washed before eating for example a diluted solution of mild dish-washing detergent can be made for this purpose.
3) Always prefer to buy organic in-season fruits present in market having high assurance of pesticide free.
4) Planting own organic vegetables an d fruits is best way to keep yourself away from toxic pesticides.
5) Should have knowledge of ways of testing toxicity.
________ waves need to interact with particles of either a solid, liquid, or gas to travel.
Mechanical waves waves need to interact with particles of either a solid, liquid, or gas to travel.
Explanation:
In the world, the dispersal of energy is under the control of two important waves called electromagnetic waves and mechanical waves. Waves in water and sound waves in air are two instances of mechanical waves. Mechanical waves are brought about by an unsettling influence or vibration in particles of either a solid, liquid, or gas to travel.
Water waves are formed by vibrations in a fluid and sound waves are shaped by vibrations in a gas (air). These mechanical waves travel through a medium by making the atoms to interact with one another.
I'm pretty sure it's Sound waves.
Explanation: I know this is most likely for a DBA and for science notes.
Which of the following statements does not explain what a geneticist, someone who specializes in genetics, does?
A) performs experiments on pea plants to determine how self- and cross-pollination occur
B) studies a family's history to identify who carries the trait for a genetic disorder C)identifies new genetic disorders
D) researches ways scientists can better track trait inheritance
The incorrect statement about what a geneticist does is A) performs experiments on pea plants to determine how self- and cross-pollination occur, as this describes Gregor Mendel's historical work, not a typical activity of modern geneticists.
The statement that does not explain what a geneticist does is: A) performs experiments on pea plants to determine how self- and cross-pollination occur. This task was specifically performed by Gregor Mendel in the 19th century and forms the historical basis of the field of genetics. Modern geneticists conduct a wide range of activities that include studying familial histories for genetic disorders, identifying new genetic disorders, and researching how traits are inherited, but they do not typically engage in mendelian pea plant experiments as a primary activity.
Geneticists specialize in the study of heredity and the variation of inherited characteristics. They conduct experiments and investigations that may build upon Mendel's principles, but do not often replicate his historic pea plant experiments unless for educational purposes. Instead, their work tends to utilize advanced techniques and technologies to understand complex genetic interactions and their implications on health and disease.
Irrigation at night using recycled water and drip sprinkler irrigation are ways not to conserve water t or f
The statement 'Irrigation at night using recycled water and drip sprinkler irrigation are ways not to conserve water' is b. false.
Both irrigation at night using recycled water and drip sprinkler irrigation are methods that conserve water.
Drip irrigation is a highly efficient method of delivering water directly to the crop roots, hence minimizing water wastage through evaporation and runoff.
This practice is extensively used in places like Israel, which are known for their advanced water conservation techniques. Recycled water, often referred to as grey water, is treated wastewater that can be reused for agricultural purposes.
Irrigating at night significantly reduces the amount of water lost to evaporation compared to daytime irrigation. As a result, more water reaches the plants, further enhancing efficiency.
Complete question:
Irrigation at night, using recycled water, and drip sprinkler irrigation are ways not to conserve water
Please select the best answer from the choices provided
a. T
b. F
The combined gradient that affects ions like potassium and their potential to diffuse across the cell membrane
is described as _________?
A. passive
B. extracellular
C. electrochemical
For sediment to be transformed into rock, which set of processes must take place?
Answer:
Step 1: weathering of pre-existing rocks Step 2: Transport the weathering rocks Step 3: Desposition of the rocks Step 4: Compaction Step 5: Cementation for the sediment to form a rock.
Explanation:
Answer:
For sediments to be converted into rocks, initially a rock body or a source rock must be weathered as a result of which these broken materials are produced. This broken rock fragments are then transported from one place to another by the agents such as wind, water and ice. This materials are deposited at a different place where they are subjected to compaction and lithification, resulting in the formation of a clastic sedimentary rock.
The word 'clastic' refers to the broken rock fragments.
For example, shale, sandstone, conglomerate and breccia.
what organelle pacakage and distributes secretions?
Answer:
the golgi apparatus
Explanation:
help me!!! picture is provided!!!
Answer:
The species attracted new predators
Explanation:
What is the name of a complex group of organisms that are connected and interact with one another
An ecosystem is a complex network of interacting organisms and their environment. It includes a food web that illustrates the transfer of energy between producers, consumers, and decomposers. Ecosystems are vital for maintaining ecological balance and the flow of nutrients.
The term for a complex group of organisms that are connected and interact with one another is an ecosystem. In an ecosystem, different populations of organisms coexist and form a community that interacts not only among themselves but also with the physical environment. This level of ecological study helps us understand the intricate connections that allow diverse life forms to thrive together. For example, in an ecosystem, a food web illustrates how energy and nutrients flow from one organism to another, demonstrating the dependence and relationships between producers, consumers, and decomposers.
Each organism plays a specific role within this system, contributing to the broader biogeochemical cycles that sustain life on earth. The primary producers, such as plants and algae, harness energy from the sun to create biomass through photosynthesis. This biomass serves as the foundation for all other organisms within the food chain, with consumers and decomposers relying on it for their survival. The complex interactions and feedback mechanisms within ecosystems are essential for maintaining balance and resilience against environmental changes.
"Conservation of energy" refers to the fact that _____
Answer:
Energy cannot be destroyed or created, it is instead transferred.
"Conservation of energy" refers to the fact that energy can neither be created nor destroyed.
What does that mean?This means that energy is always renewing itself.This means that energy is inexhaustible.The principle of conservation of energy is present in Newton's first law and refers to the fact that energy, as a generalized concept, cannot be completely depleted, cannot be created from anything, but is in a constant process of renewal and transformation.
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Is the question is it ethical to eat meat testable?
I need help with the independent variables. (This isn't biology, but they didn't have a normal science category.)
Explanation:
The independent variable is the variable in the experiment that is deliberately changed.
1. The independent variable is the use of a calculator- Some used calculators, others didn't. This variable will affect the results. For example, it would be expected that the students who used calculators would perform better.
2.The independent variable is the age of the students.
3.The independent variable is the use of vocabulary flash cards.
Select the correct location on the image.
The diagram shows an unfertilized female sex cell at different locations within the reproductive system. At which location can it correctly be
termed an oocyte?
Unfertilized female sex cells which are present in the covering of blue regions are correctly termed oocytes.
What is Oocyte?An Oocyte may be defined as a female unfertilized female sex cell or immature egg cell that is present in the ovary and may undergo meiotic division to form an ovum.
According to the diagram, the portion of the female reproductive system which is blue in color is known as the ovary that produces the egg cells in the females and is termed an oocyte.
Therefore, it is well described above.
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Answer:
Explanation:
the second box
PLEASE HELP!!!!!!!!!!! ANSWERS ONLY!!!!!!!!!!!
Scientists have genetically engineered crops to be resistant to herbicides. This allows farmers to kill weeds with small doses of herbicides that don’t harm the crops. Why, then, are people concerned that transgenic plants may lead to an increase in the use of herbicides?
Cross-pollination could cause the crops to lose their herbicide resistance.
Weeds may naturally develop herbicide resistance with each dose.
Herbicide-resistant crops may grow out of control and become weeds.
Cross-pollination could pass herbicide-resistant genes to the weeds.
Answer:
The correct option is Option C i.e. Herbicide-resistant crops may grow out of control and become weeds.
Explanation:
1. The herbicide resistance is a genetic character that is introduced into the plant with help of genetic engineering.
2. Now crops are not sexually reproduced. New seeds are planted every season. So chance of losing the herbicide resistance is less.
3. The risk of weeds becoming herbicide resistant is there even with genetic engineered crops.
4. Cross-pollination between two different species doesn’t occur generally.
5. But if these plants are not killed by any herbicides, they themselves can grow too fast as weeds.
Answer:
A. Cross-pollination could cause the crops to lose their herbicide resistance.
Explanation:
Herbicide resistance is the acquired capacity of plants to endure and imitate following introduction to a portion of herbicide typically deadly to the wild kind. Herbicides don't actuate opposition in weed species, rather they basically select for resistant individuals that normally happen inside the weed populace.
Herbicide resistance, communicated by a recessive allele, advances and spread generally gradually as the dominant heterozygotes and homozygous prevailing phenotypes are dispensed with by use of the herbicide to which resistance created.
This is truthful for cross-pollinating species, be that as it may, in exceptionally self-pollinating species, the resistant alleles can spread rapidly as selfing increments the recurrence of homozygotes to the detriment of heterozygotes.
which events caused the oceans to form
Answer:
About 3.8 billion years ago, the water condensed into rain which filled the basins that are now our oceans. According to this theory, the ocean formed from the escape of water vapor and other gases from the molten rocks of the Earth to the atmosphere surrounding the cooling planet.
White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cells do not live for very long on their own. To keep the B cells growing for a long time in laboratories, scientists fuse the B cells with cancer cells (fused B-cancer cells) that do grow for a very long time. The particular cancer cells used for the fusion are treated with chemicals that make them unable to produce the nitrogenous bases adenine and guanine, but the B cells with which they are fused do produce these nitrogenous bases. The scientists grow the large fused B-cancer cells in a growth medium that contains necessary nutrients for the cells and includes a source of carbon.
(a) Describe the role of carbon in biological systems.
Answer:
Carbon is the basic compound for making of molecules in biological systems. IN growth medium, carbon sources are added to provide energy.
Explanation:
Without carbon, there would be no life on earth. Carbon molecules have the ability to form bonds that are stable with a vast number of molecules. It can also form bonds with itself. The proteins, amino acids, DNA, RNA, lipids all contain carbon molecules. Hence, it serves as the basic compound for making molecules of life.
In the growth culture media, Carbon is added in the form of carbohydrates like glucose or glutamine as it provides main source of energy.
Carbon is a necessary component of all life on Earth. Carbon intake and outflow are a part of every plant and animal life, whether they take in carbon to help build food or release carbon as part of respiration. Carbon is always moving from one location to another.
In biological processes, carbon is the most fundamental component used to create molecules. Carbon sources are introduced to the growing medium to give energy.There would be no life on Earth if it weren't for carbon. Carbon molecules have the ability to create stable connections with a large variety of other compounds. It's also capable of forming bonds with itself. Carbon molecules can be found in proteins, amino acids, DNA, RNA, and lipids.Thus, it acts as the building block for life's molecules. Carbon is given to the growth culture media in the form of carbohydrates such as glucose or glutamine because it is the primary source of energy and plays a major role in the biological system.
explain what polarity is in relation to water and oil
Answer:The relative polarity of two molecules directly relates to their solubility. In general, solutions involve molecules of similar polarity. Therefore, oil is insoluble in water. In fact, oil is said to be hydrophobic, or "water-hating."
Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name? Krypton is a halogen, so it is a secret element because it is always part of a compound and is difficult to find by itself. Krypton is a halogen, so it should be kept secret because it is so reactive and toxic. Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret. Krypton is a noble gas, so it secretly bonds with every type of element without showing it.
Answer:
Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret
Explanation:
Krypton is a noble gas and this demand it has full orbital electron shells (2.8.18.8 or [Ar].3d¹⁰.4s².4p⁶). They, therefore, do not have an affinity for gaining or losing an electron hence rarely react with other elements. They were therefore hard to discover by early chemists because there were no known compounds of this gas and other noble gases. This is why the name ‘hidden’.
Answer:
Explanation:
on edgenuty its c
Why does a star of
average mass expand
into a red giant?
Answer:
When a star expands, the surface of the star becomes cooler as well as redder. Hence, forming the red giant.
Explanation:
If all the hydrogen which is present in a star gets fused into helium then an increase in the core temperature can be seen along with the core contractions. As a result of these core pressures and the core temperatures, the helium gets fused into carbon through a process known as the triple alpha process. As a result, the star begins to expand whereas its surface becomes cooler and redder which leads to the formation of red giant.
Please help!!!!!!!!!!!!!!!
Answer:
if you had 4 offspring then 2 would be black and 2 would be white because of the punt square being dominant (B) and the recessive of the black one and the 2 bb's of the white one it would come out both ways hope that helpped
Explanation:
A) 50% of guinea pigs have white fur
50% of guinea pigs have black fur
28.
What is the ratio of C, H, and O atoms in carbohydrates?
2:3:2
stry
1:6:1
Today
1:3:1
on, and
1:2:1
Answer:
1:2:1
I hope this helps you!
Answer:
1:2:1
Explanation:
Which will reduce competition within a species' population?
fewer individuals
higher birthrate
fewer resources
higher population density
Answer:
Fewer resources
Explanation:
With fewer resources, there won't be many competitions with a species population increasing. And not only that but without any resources, there won't be any "competitors" left to compete.
Competition among species is defined as the rivalry for the shortcoming of resources like food, shelter, and water. The competition among species can be reduced by fewer resources.
The correct answer is:
Option C. fewer resources
Competition is defined as the rivalry among the organisms belonging to different ecological niches for resources.
The species when competing for the limiting resource will cause the overlapping of the ecological niche. This will lead to evolutionary changes in the organisms.
The selection of better-suited organisms to the environment will have a higher chance of survival and adapt to utilize the resources left available.
With fewer resources, the competition among species decreases as there won't be competitors available.
Therefore, option C is correct.
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Which physical change is represented by the diagram below?
Answer:
The answer to your question is deposition
Explanation:
In the picture we can see that molecules are moving fast and after a process they move slower, they change from a gas to a solid state.
a) condensation this answer is wrong because condensation is transformation of vapor into gas and does not happen in this picture.
b) deposition this is the correct answer
c) evaporation matter changes from liquid to gas, then this answer is wrong.
d) sublimation matter changes from solid to gas in the picture happens the opposite.
Deposition physical change is represented by the diagram below. Hence the correct option is b.
The diagram illustrates a scenario where 200 g of water is poured into a beaker, and the choice of deposition aligns with the process depicted. Deposition is the transformation of a substance from a gas directly to a solid without passing through the liquid phase. In this context, as the water vapor is poured into the beaker, it undergoes deposition and changes directly into a solid state, forming ice in the beaker. This interpretation is consistent with the physical change described in the diagram, where the water undergoes a phase transition without first becoming a liquid.
This scenario contrasts with more common phase changes, such as evaporation or condensation, where a substance transitions between the liquid and gas phases. Deposition skips the liquid phase altogether, and the water vapor converts directly into solid ice particles. This portrayal in the diagram captures a distinctive aspect of phase transitions, highlighting the diversity of physical changes that can occur in different conditions and contexts. The comprehension of deposition in this scenario adds depth to our understanding of the intricacies of phase changes and the versatile behaviors of matter. Hence the correct option is b.
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If you have an idea to improve a complex software process at work, what is the most effective way to communicate this idea?
Notify your boss of your plans in an email you write quickly, without carefully proofreading it
Start to implement your idea immediately so others can see how you expect it to work
Tell your coworkers that you think you have a way to improve the process
Organize your thoughts and present the idea to your boss in a written report
Mark this and return
Save and
Submit
here to search
Answer: Option D
Explanation:
If there is a certain idea regarding any process which can be improved then the thought to improve it should be first shared with the boss of the company.
Firstly, the person sharing the thought should himself be sure about the thought that he is going to present in front of the boss.
The thought regarding the improvement of the software process should be first written in an organized way and presented to the boss.
Answer:
D
Explanation:
just because
what is the difference between internal and external respiration??
Answer:
External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.
Explanation:
What most likely happens when water loses heat?
It changes into ice.
It changes into vapor.
Its temperature increases.
Its temperature remains constant.
(I think it is the first or the last one)
WILL MARK BRAINLIEST FOR THE FIRST PERSON WHO ANSWERS CORRECTLY IF POSSIBLE!!!!!!!!!!!!!
Answer:
It changes into ice
Explanation:
It depends on how much heat it is, if it loses a lot of heat then the water will freeze and the molecules will bunch together to form a solid so it will change into ice hope this was helpful!