how can mass help identify an unknown substance
Answers
Answer:
Explanation:
You cannot use mass to tell one substance from another.
two very different objects can have the same mass.
Related Questions
why must dsrna viruses package an rna-dependent rna polymerase (rdrp) inside their viral capsid?
Answers
dsRNA viruses package an RNA-dependent RNA polymerase (RdRp) inside their viral capsid because this enzyme is essential for viral replication. Unlike cellular RNA polymerases, which require a DNA template to synthesize RNA, RdRp can use viral RNA as a template for RNA synthesis.
1. Genome replication: RdRp is essential for replicating the virus's dsRNA genome. Upon entering a host cell, the RdRp synthesizes new RNA strands, ensuring the viral genetic material can be propagated.
2. Host cell machinery: Unlike single-stranded RNA viruses, dsRNA viruses cannot utilize the host cell's machinery for replication. Packaging RdRp within the capsid ensures the necessary enzyme is available for replication within the host cell.
3. Transcription: RdRp plays a vital role in the transcription process of dsRNA viruses, creating mRNA from the viral dsRNA genome. This mRNA is then translated into viral proteins by the host cell machinery.
4. Compartmentalization: Packaging RdRp within the viral capsid helps protect the enzyme from degradation by host cell defenses, ensuring its availability for viral replication and transcription.
In summary, dsRNA viruses package RdRp inside their viral capsid to facilitate genome replication, utilize host cell machinery for transcription, and safeguard the enzyme from degradation, ensuring a successful infection.
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a substance with a pH of two is called
Answers
Answer:
an acidic substance
1. How is the property of compressibility of gases used in everyday life? Give an example.
Answers
Answer:
Compressibility is reducing the volume by increasing the pressure of a substance like liquid or gas. It is a physical characteristic of a substance especially gases.
Everyday life examples:
(1) LPG - These gas cylinders have compressed natural gas to liquid gas to store and use as fuels.
(2) Tubes of bicycles are filled by the pumps that compress the air.
(3) Carbonated soda filled with the help of compressing the carbon dioxide into the bottle.
4) oxygen bottles in medical institutes for helping the patient to breathe.
What is gold an example of?
Answers
Answer:
Money, Power, and Death
Explanation:
Answer:
nonrenewable resource
This questions has two parts
35 points
Answers
Part A
Answer: (A) Candida Albicans and Saccharomyces Cerevisiae
Explanation: They have the smallest difference in Cytochrome C
Part B
Answer: (B) The two species have high molecular homology
Explanation: Molecular homology means resemblances between species on the molecular level. Since the two species from the answer in Part A have the smallest difference in Cytochrome C it means they have high molecular similarities; this is due to evolving from the same common ancestor.
(A) is not the right answer because the fungi in the table might all look similar but have different or similar genetic blueprints.(C) is not the right answer because fungi can reproduce sexually or asexually, so reproduction cannot help with determining relatedness.(D) is not the right answer because if the two species from the answer in Part A are closely related because they are both fungi, the answer for Part A should be all of the options._______16. Which of these lists presents the stages of the cell cycle in the correct order?
1. Interphase, mitosis, cytokinesis
2. Mitosis, interphase, cytokinesis
3. Cytokinesis, mitosis, interphase
4. Interphase, cytokinesis, mitosis
Answer the four questions please thanks
Answers
Thee stages of the cell cycle in the correct order is Interphase, mitosis, cytokinesis. Hence, the correct option is 1.
Interphase is the longest phase of the cell cycle during which the cell grows, replicates its DNA and prepares for cell division. It is divided into three stages: G1 (Gap 1), S (synthesis) and G2 (Gap 2). During G1, the cell grows and synthesizes RNA and proteins. During S phase, the cell replicates its DNA. During G2 phase, the cell grows and prepares for mitosis.
Mitosis is the second stage of the cell cycle, which is divided into four phases: prophase, metaphase, anaphase, and telophase. During mitosis, the replicated chromosomes condense and align along the cell's equator before being pulled apart by the spindle fibers.
Hence, the correct option is 1.
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height, weight, and gender identity are examples of ______ factors that can affect perception.
Answers
Height, weight, and gender identity are examples of physical factors that can affect perception.
These factors can influence the way people are perceived by others and can lead to biases and stereotypes. For example, taller people may be seen as more confident or authoritative, while those who are overweight may be judged as lazy or lacking willpower.
Similarly, individuals who do not conform to traditional gender norms may face discrimination and prejudice based on their identity. It is important to recognize how these physical factors can shape our perceptions and work to challenge any biases or stereotypes we may hold.
By promoting awareness and understanding of these factors, we can strive to create a more inclusive and equitable society for all individuals, regardless of their physical attributes.
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Which is a point mutation and not a frameshift mutation?
mutagen
insertion
deletion
silent
Answers
Answer:
silent
Explanation:
jus took the test
Silent mutation is a point mutation and not a frame-shift mutation.
MUTATION:
Mutation is a change in the nucleotide sequence of a DNA caused by a mistake in DNA replication or by a mutagen. A point mutation is a type of mutation that affects or involves only one nucleotide base in the sequence. A frame-shift mutation is that change in the nucleotide sequence of DNA which affects the frame-shift of the nucleotides. Frame-shift mutation occurs when a nucleotide is added (insertion mutation) or removed (deletion mutation). Silent mutation occurs when the change in nucleotide sequence does not alter the protein produced by that gene. Silent mutation is a form of point mutation. Therefore, silent mutation is a point mutation and not a frame-shift mutationLearn more: https://brainly.com/question/9598940?referrer=searchResults
Kelp play a substantial role in building the structure for kelp forests impacting species richness. Which statement best explains the role of kelp forests in maintaining the diversity of the ecosystems? (3 points) Kelp forest act as ecosystem engineers. Kelp act as an invasive species. Without the otters to eat the kelp the feeding relationship would collapse. With the presence of consumers, kelp is an invasive species.
Answers
The statement that best explains the role of kelp forests in maintaining the diversity of the ecosystems is A. Kelp forests act as ecosystem engineers, this is
What are kelp forests?Kelp forests are found in shallow, cool waters and provide shelter, food, and nutrients for many animals such as sea urchins, sea stars, fish, and many other species. Kelp forests also provide a habitat for other important marine species like whales, seals, sea lions, and otters.
Kelp forests are known as the foundation species and the most important ecosystem in the ocean. They play a crucial role in maintaining the ecosystem balance. These forests have a considerable role in building the structure of the marine ecosystem and in maintaining species diversity. The kelp forests provide a habitat for a diverse range of species, which increases species diversity.
As a result, these species play an important role in maintaining the balance of the ecosystem. Thus, kelp forests act as ecosystem engineers (option A).
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a. what is a promoter, and how does bacterial rna polymerase locate it?
Answers
Answer:A promoter is a DNA sequence that initiates transcription by recruiting RNA polymerase and other transcription factors to the site. In bacteria, RNA polymerase locates the promoter through a process known as scanning.
The bacterial RNA polymerase holoenzyme consists of a core enzyme and a sigma factor. The sigma factor recognizes specific DNA sequences in the promoter region, called the -10 and -35 boxes, which are located about 10 and 35 nucleotides upstream from the transcription start site, respectively. The sigma factor interacts with these promoter elements and initiates the formation of a transcription bubble, which separates the two strands of DNA and allows RNA polymerase to begin synthesizing an RNA molecule using the template strand as a guide.
In addition to the -10 and -35 boxes, there are also other promoter elements that can affect the strength and specificity of the promoter, such as upstream promoter elements (UP elements) and discriminator elements. These elements can help recruit RNA polymerase and other transcription factors to the promoter, as well as fine-tune the level of transcription that occurs at that particular site.
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The most abundant element in Earth’s continental crust, by weight, is _____.
Answers
Answer:
Oyxgen is the heaviest.
Explanation:
Black hair is dominant over white hair in rabbits. If a heterozygous, black-
haired male is crossed with a white-haired female, what is the probability
that their offspring will have white hair? *
100%
75%
50%
0%
Answers
Answer:
50%
Explanation:
After a long, dry summer , a meadow ecosystem is no longer in equilibrium (balance) as it was the season before. Identify the most probable cause of this.
A. Not enough precipitation had caused the meadow to move out of equilibrium
B.Too many predators had caused the meadow to move out of equilibrium
C.Wildfires had caused the meadow move out of equilibrium
D. Biotic factors were most likely affected by disease which made the meadow move out of equilibrium
Answers
After a long, dry summer , a meadow ecosystem is no longer in equilibrium (balance) as it was the season before, Not enough precipitation had caused the meadow to move out of equilibrium (option A)
What is a meadow ecosystem ?The meadow ecosystem provides a striking contrast compared with forested terrains as they lack towering trees or dense shrubbery while featuring exquisite fields speckled with herbs amidst undulating terrain characterized by moderate-to-high precipitation patterns depending on location.
Typically found adjacent low-lying topography like riverbanks and valley bottoms due to excellent soil conditions partly due to frequent flooding; most notably though it’s the lavish herbaceous life that defines this habitat, including wildflowers and various grasses making it a veritable feast of verdant life.
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what are the advantages and disadvantages of using models to understand human impacts on earth's systems and the carbon cycle?
Answers
Answer:
Models are used for understanding a process or phenomenon.
Explanation:
Advantages of using models:
1) It gives some information about the human impacts on earth's systems and carbon cycle.
2) It also helps in discovering the defects and errors.
Disadvantages of using models:
1) It did not fully explain the human impact on both earth and carbon cycle.
2) It is the simplified version not an actual version of the real situation of carbon cycle.
The advantages and disadvantages for using the models should be explained below.
Advantages & disadvantage for models that effect the earth system and the carbon cycle:Advantages of using models:
1) It provides some kind of information related to the human impacts on the earth's systems and the carbon cycle.
2) It helps in finding out the defects and errors.
Disadvantages of using models:
1) It did not describe fully related to the human impact on both earth and carbon cycle.
2) It should be the simplified version but not an actual version of the real situation of the carbon cycle.
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HELP ASAP PLS
In 1839 a scientist named Theodor Schwan proposed a theory that later became known as the cell theory. The theory stated the following.
1.All living things are made up of cells.
2.The cell is the most basic unit of life.
The theory at the time did not include where cells came from. In 1859, Louis Pasteur conducted an experiment that showed that living cells must come from other living cells. This idea was added to the cell theory. The other two points of the theory were not discarded, so the theory was modified. Why was the older cell theory modified and not discarded?
A.
Scientific theories cannot be discarded after a certain period of time has passed.
B.
The first two ideas of the theory cannot be changed since they are scientific laws.
C.
The first two ideas of the cell theory were still supported by evidence.
D.
Scientific theories require the use of some older scientific knowledge in order to be valid.
Answers
The cell theory was modified, rather than discarded, because the first two points of the theory were still supported by evidence. Even though Louis Pasteur's experiment showed that living cells must come from other living cells, the idea that all living things are made up of cells and that the cell is the most basic unit of life was still considered valid and supported by scientific evidence.
Therefore, the cell theory was modified to include Pasteur's discovery, rather than being discarded and replaced with a completely new theory. This is common in science, as theories are often modified and updated as new evidence and discoveries are made, rather than being discarded and replaced entirely.
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Help me plz I have to get this done by Friday June 4
Answers
Answer:
a. is explination 1
b is explaination 2
Explanation:
1: Amoeba use pseudopodia to move from one place to another in the aquatic environment, versus Chlamydomonas, which have flagella, used for locomotion.
2: Chlamydomonas contain chloroplast, which give them, the ability to perform photosynthesis to make their food from inorganic compounds so Chlamydomonas are more plant-like, unlike Amoeba, which gets their food by consuming smaller plants and animals therefore they resemble more to animals by mode of nutrition
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Coral reefs are one of the most valuable ecosystems on
Earth. Use at least two pieces of evidence from the text to
support your answer.
Answers
Coral reefs are an important source of income for millions of people, as well as an important home for marine life and a barrier against the effects of large waves for coastal communities.
Why are coral ecosystems crucial, then?Coral reefs support local economies, provide opportunities for recreation, and act as a barrier for erosion & storm damage. Also, it is a source of nutritious food and medicine. Reefs are essential for the safety, livelihood, and nourishment of more over 500 million people.
What function do coral reefs provide in the natural world?Coral reefs are an important source of income for millions of people, as well as an important home for marine life and a barrier against the effects of large waves for coastal communities. Coral reefs are abundant with diverse life.
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what is a benefit of synthetic pesticides? group of answer choices they have saved human lives they pose little threat to wildlife they pose little threat to human health they seldom pollute the environment they accelerate the development of genetic resistance to pesticides in pests
Answers
The benefit of synthetic pesticides is that they have prevented the loss of life.
What makes us use pesticides?Pesticides offer the finest chance for individuals who balance risk-benefit analyses because of the wide range of benefits they bring to humans. Pesticides are projected to have an annual economic cost of about $8 billion in underdeveloped nations when used on non-target species like people.
Do pesticides have an environmental influence, either positively or negatively?If the benefits of pesticides include improved economic potential in terms of greater food and fiber production as well as the reduction of vector-borne diseases, then their drawbacks include grave negative effects on human and environmental health.
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Plants make food; animals only ingest it.
Compare and contrast their digestive systems.
Include a) the structures involved in the digestive system of each and b) the processes
involved in creating their own food to the point of use in another organism
to use in an organism, in order.
Answers
The digestive systems of plants and animals are quite different. The primary difference is that plants are capable of producing their own food, while animals rely on outside sources. Plants take in carbon dioxide, water, and other nutrients and turn them into glucose and oxygen via photosynthesis.
Animals, on the other hand, must consume food to survive. The digestive system of plants includes a few structures and processes that are not present in animals, such as chloroplasts, which contain chlorophyll, and stoma, which regulate gas exchange. Plant Digestive System The primary function of a plant's digestive system is to convert light energy into chemical energy that can be used to fuel the plant's cellular processes.
The resulting glucose and oxygen are then used by the plant to fuel cellular processes and support growth.
Animal Digestive System : The animal digestive system, unlike the plant digestive system, is specialized for the consumption and breakdown of food. The digestive system of animals begins in the mouth, where food is taken in and begins to be broken down by enzymes in the saliva. The food then moves through the esophagus to the stomach, where it is further broken down by stomach acid and enzymes. The nutrients are then absorbed in the small intestine, while the waste products are eliminated in the large intestine.
Conclusion : In conclusion, the digestive systems of plants and animals are quite different. While both systems involve the absorption and use of nutrients, plants are capable of producing their own food, while animals must consume food to survive. Additionally, the structures and processes involved in each system are unique.
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A student observes a reaction with an enzyme in a beaker. If nothing is removed from the beaker containing the reaction, what is the only thing the student must add to start the reaction again?
A.acids
B.enzymes
C.products
D.substrates
Answers
Answer:
90% Products, 10% Acids
Explanation:
enzymes are not consumed in a reaction. they remain mixed with reactants. if all products have reacted in the reaction and there's nothing left, the answer is products.
But acids promote chemical reactions at certain incidents. especially if it's an essential compound to the reaction.
Ex-: Sucrose is hydrolysed to Fructose and glucose by heating with an acid. but using sucrase, the same can be done.
A trait that appears, even if one recessive
allele is present
Answers
Answer:
What is the question? :))))))))
If catfish eat algae, and there's 20,000 kcal/m2 of energy stored as biomass in algae in a pond, how much energy stored as biomass in catfish in that pond would you expect there to be?
Answers
There will be 2,000 kcal/m² of energy stored as biomass in catfish in the pond.
What is Biomass?This is defined as the position of an organism in the food chain and 10 percent of energy stored as biomass in a trophic level is passed from one level to the next.
This is why the 10 percent of 20,000 kcal/m² which is 2,000 kcal/m² will be most likely present in the next level.
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Eggs that have allowed eggs to be laid Extra embryotic fluid; in trees An extra large embryo; in deep ocean depths A hard casing; on land A soft shell; under intense water pressure Question 9 Over a of the air was oxygen in the Carboniferous. 1/3 1/4 1/5 1/2
Answers
Over a 1/3 of the air was oxygen in the Carboniferous.
During the Carboniferous period, which lasted from approximately 359 to 299 million years ago, the Earth experienced high levels of atmospheric oxygen. The lush vegetation that thrived during this period played a crucial role in increasing oxygen levels through photosynthesis, as plants release oxygen as a byproduct. The accumulation of plant material, particularly large forests of ferns, horsetails, and early trees, led to the formation of extensive coal deposits that we see today.
The high oxygen content in the atmosphere during the Carboniferous had significant impacts on both terrestrial and aquatic ecosystems. It provided an environment conducive to the evolution of a diverse range of organisms, including giant insects and early amphibians. The availability of oxygen also supported the development of larger body sizes, such as the presence of extra-large embryos in some marine organisms adapted to deep ocean depths.
Furthermore, the higher oxygen levels likely influenced the evolution of certain reproductive adaptations in various species. For example, the development of hard casing in eggs allowed them to be laid on land, providing protection and preventing desiccation. Soft-shelled eggs under intense water pressure may have been advantageous for organisms adapted to the depths of the ocean.
Overall, the elevated oxygen levels in the Carboniferous had profound effects on the ecology and evolutionary history of life, shaping the characteristics and adaptations of organisms during this time.
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A high-pitched crowing sound from the upper airway results from tracheal or laryngeal spasm and is called what?.
Answers
A high-pitched sound called stridor is connected to laryngeal blockage. There are several congenital causes of laryngomalacia, including laryngeal web, unilateral or bilateral vocal cord palsy, subglottic stenosis, subglottic hemangioma, and tracheomalacia.
What is a strideor ?When your youngster breathes in, you are most likely to hear strudor, a high-pitched sound (also known as "inspiration"). Your child's upper airway is frequently the source of the obstruction or constriction.
When they breathe in or out, children who have asthma or other respiratory conditions may wheeze or make stridor, a high-pitched, turbulent sound that is less melodic than a wheeze. Typically, stridor is a sign of an obstruction or restriction of the upper airway outside of the chest cavity.Learn more about Stridor here:
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I don’t know what to do anymore please help ‼️
Answers
Answer:
I think it's " C and D" not to sure about "C" but one of the answers is definitely " D"
Explanation:
the wight of a child taken over the first 18 years of their life by a type of
Answers
Answer:
what subject is this and do we need an equation for it
Explanation:
Tomatoes are genetically modified to have a longer shelf life, slowing the ripening and softening of the tomato. Which best describes a
concer people have with eating genetically modified tomatoes?
Genetically modified tomatoes do not taste as good as regular tomatoes,
B. Genetically modined tomatoes are more expensive than regular tomatoes
DC The DNA used to modify the tomatoes could change the DNA of the person eating the tomato.
Answers
Answer:
C. (last one)
Explanation:
There is a lot of heavy superstition surrounding the ingestion of genetically modified foods and some people believe that consuming foods modified by different DNA can effect their own. However, this is scientifically impossible as a person's DNA is not something that can be modified by anything as you are born with it and your DNA makes up your entire body. Almost every cell in your body contains at least some DNA, meaning that to modify it, every single cell in your body would have to change
why do you think the source of information related to job are important for the concerned people
Answers
Answer:
It’s important to avoid extra costs, time and wrong knowledge/ idea.
Explanation:
I think the source of information related to job are important for the concerned people in order to enable them have the best view and position on jobs available. This helps them to weigh their options very well before taking decisive actions.
It also helps to avoid extra costs, time and wrong knowledge/ idea which in turn promotes general efficiency of such group of people.
Based on the phylogenetic tree, what species shares a most recent common ancestor with the blue whale?
A) Extinct Mammal
B) Angus Cattle
C) Pygmy Hippopotamus
D) White-Tailed Deer
Answers
Answer:
C
Explanation: just took the test
Which two processes during cellular respiration release chemical energy
stored in chemical bonds?
A. The conversion of NADH to NAD*
B. The splitting of glucose
C. The production of ATP by ATP synthase
D. The conversion of FAD to FADH2
Answers
The splitting of glucose release chemical energy stored in chemical bonds.
In process of cellular respiration, the energy in food is converted into the energy that is used by the body's cells. In process of cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is converted to ATP.
Cellular respiration, is the process that takes place in the mitochondria of organisms which break down sugar in the presence of oxygen and release energy in form of ATP. Carbon dioxide and water are released as the waste products.
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