Answer:
B
Explanation:
Hope this helps, oh and did i forget to tell you you got this?
As evidenced in the graph, the national average CO concentrations have decreased substantially over the years. All BUT ONE tactic
listed below has been utilized to reduce carbon monoxide emissions. That is:
Answer:
Explanation:
Carbon monoxide (CO) is a colourless, non-irritant, odourless and tasteless toxic gas. It is produced by the incomplete combustion of carbonaceous fuels such as wood, petrol, coal, natural gas and kerosene. Its molecular weight is 28.01 g/mol, melting point −205.1 °C, boiling point (at 760 mmHg) −191.5 °C (−312.7 °F), density 1.250 kg/m3 at 0 °C and 1 atm and 1.145 kg/m3 at 25 °C and 1 atm, and relative density (air = 1) 0.967 (1,2). Its solubility in water at 1 atm is 3.54 ml/100 ml at 0 °C, 2.14 ml/100 ml at 25 °C and 1.83 ml/100 ml at 37 °C.
The molecular weight of carbon monoxide is similar to that of air (28.01 vs approximately 29). It mixes freely with air in any proportion and moves with air via bulk transport. It is combustible, may serve as a fuel source and can form explosive mixtures with air. It reacts vigorously with oxygen, acetylene, chlorine, fluorine and nitrous oxide. Carbon monoxide is not detectable by humans either by sight, taste or smell. It is only slightly soluble in water, blood serum and plasma; in the human body, it reacts with haemoglobin to form carboxyhemoglobin (COHb).
The relationship of carbon monoxide exposure and the COHb concentration in blood can be modelled using the differential Coburn-Forster-Kane equation (3), which provides a good approximation to the COHb level at a steady level of inhaled exogenous carbon monoxide.
Conversion factors
At 760 mmHg and 20 °C, 1ppm = 1.165 mg/m3 and 1 mg/m3 = 0.858 ppm; at 25 °C, 1 ppm = 1.145 mg/m3 and 1 mg/m3 = 0.873 ppm.
Answer: B
Explanation: just had the same question
ANSWER FAST‼️‼️‼️Based on the information in the stimulus and Map 1, which
statements best explain why opal is found in places such
as Australia? Choose the two correct answers.
Answer:
Australia has large amounts of sandstone and silica.
and
Opal can only be formed where an ocean comes in contact with land.
Explanation:
because it needs standstone and a ocean to be able to create opal
Opal can only be formed where an ocean comes in contact with land. So, the correct option is (B).
What is an Opal?Opal is defined as a hydrated amorphous form of silica where the water content can range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous property, opal is classified as a mineral, in contrast to the crystalline forms of silica, which are considered minerals.
Opal is arguably the most unique, diverse and beautiful, it does not have a defined crystalline structure which takes on many shapes and colors and thus is very unpredictable.
It can be formed where the sea is in contact with the sand, as in places such as those in Australia.
Thus, Opal can only be formed where an ocean comes in contact with land. So, the correct option is (B).
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Your question is incomplete, most probably the complete question is :
Based on the information in the stimulus and Map 1, which statements best explain why
opal is found in places such as Australia? Choose the two correct answers.
A. Australia has large amounts of sandstone and silica.
B. Opal can only be formed where an ocean comes in contact with land.
C. An inland sea once covered central to eastern Australia.
D. Australia has a very hot desert-like climate in most areas.
E .Australia has very few active volcanoes across the continent.
Please help me- will give brainlist
Answer:
UCCGAU
Explanation:
1. What is a renewable natural resource?
2. What is a nonrenewable natural resource?
can someone please help me
WILL MARK YOU BRAINLIEST !!!
Answer:
Its D mutualism
Explanation:
mutualism (a relationship in which both organisms benefit).
Hope this helps :)
In which location would fisherman most likely catch a greater number of fish?
at the shorline
O intertidal zone
O in an upwelling
O on the deep ocean floor
Answer:
On the deep ocean floor
Explanation:
This is because it is the lowest layer of the ocean where little or no light penetrate. In this floor, there are abundance of organic matter which the fish majorly feed and that is why they abundant there. The temperature in deep ocean floor is moderate and it's okay for their survival. The humidity also is moderate and that is why they live there.
Large complex carbohydrates are made of simple sugars. How do
these simple sugars combine to form the large complex carbohydrates?
Answer:
Through a chemical process called "condensation". The addition of the two molecules typically proceeds in a step-wise fashion to the addition product, usually in equilibrium, and with loss of a water molecule.
Hope it helps ❤️
Simple sugars form the foundation of more complex carbohydrates when the cyclic forms of two sugars can be linked together through a condensation reaction.
How are Carbohydrates formed?Carbohydrates are obtained through a chemical process called "condensation", where the addition of two molecules occurs to an addition product in a stepwise manner, usually at equilibrium, and with the loss of a water molecule.
Simple carbohydrates have monosaccharide and disaccharide groups where monosaccharides consist of a simple sugar unit, glucose, fructose or galactose, and they cannot be broken down into simple sugar units, then these three monosaccharides can be combined in various ways to make them more complex.
Thus, simple sugars form the foundation of more complex carbohydrates when the cyclic forms of two sugars can be linked together through a condensation reaction.
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A single atom of gold can be ________. A. both a molecule and a compound B. neither a molecule nor a compound C. a molecule D. a compound
Answer:
the awnsrr your seeking is a or d
Explanation:
ive done it before
B
I don't know..My teacher says that the answer without explanation is like destiny
True or False: Every cell in your body contains all of your DNA - the same DNA code
what is the relationship between structure and function of molecules
Answer:
PS:Can I be brainliest.
Have a nice day
Explanation:
Each molecule has a characteristic size and shape that determines its function in the living cell. The shapes of molecules are determined by the positions of the atoms' orbitals. When an atom forms covalent bonds, the orbitals in its valence shell are rearranged.
Each molecule has a characteristic size and shape that determines its function in the living cell. The shapes of molecules are determined by the positions of the atoms' orbitals.
What is molecules?
The smallest component of a substance that possesses both its chemical and physical characteristics. One or more atoms make up molecules.
They may have the same atoms (for example, an oxygen molecule has two oxygen atoms) or different atoms if they have more than one (a water molecule has two hydrogen atoms and one oxygen atom).
Biological molecules like DNA and proteins can include thousands of atoms. When an atom forms covalent bonds, the orbitals in its valence shell are rearranged.
Therefore, Each molecule has a characteristic size and shape that determines its function in the living cell. The shapes of molecules are determined by the positions of the atoms' orbitals.
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Does an unusually cold day in summer indicate that a region's climate has changed?
A
Yes; climate changes over the short term.
B
Yes; climate describes the temperature of a region at a given time.
C
No; although weather may change, climate does not change.
D
No; climate describes long-term average conditions.
B = dominant and b = recessive. What will be the result if Bb mates with bb?
The human voice box is called ................
Answer:
larynx or vocal chord..
Answer:
larynx
Explanation:
What action by an individual person is most likely to have a positive impact 1 point
on an ecosystem? *
A.planting pine trees to be sold as Christmas trees on private land.
B.planting native plants in a vacant lot.
C.planting a single economically valuable crops on 30 acres of land.
D.planting exotic shrubs in a community park.
Answer: planting native plants in a vacant lot
Explanation: you would rebuild the ecosystem that is native to the area
The action that would be taken by an individual person that is most likely to have a positive impact on an ecosystem may include planting native plants in a vacant lot. Thus, the correct option for this question is B.
What is an Ecosystem?An ecosystem may be defined as a place or an area that possesses members of different species togetherly and interact with one another for the purpose of food, space, shelter, and mating partner.
The growth of native plants will facilitate the stability of an ecosystem. This is because these plants grow more and reproduce naturally in order to exist in the ecosystem for a long period of time. While planting exotic shrubs in a community park, pine trees, and single economically valuable crops do not favor much in the stability of the ecosystem.
Therefore, the correct option for this question is B.
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Once Jared completes the experiment, he will compare the amount of foam between different sets of glasses. Drag each tile to the correct box to identify which variable he is analyzing when he compares each set of glasses.
Answer:
A and B: Presence of sugar
B, C, and D: Water temperature
B and E: type of respiration
Explanation:
help, thank you
How does using a microscope allow you to see what’s biotic or abiotic?
(how to know if a cell is abiotic or biotic)
Answer:
Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere. Examples of abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem.
Explanation:
i dont get this pls help me
Answer: They have different Genotypes but the same phenotype
In a group of rose plants, some individuals have thorns and others do not. In this group, the
gene for the thorns trait has two alleles. The allele for not having thorns (n) is recessive to the allele for having thorns (R). A certain rose plant from this group has the heterozygous genotype Rr for the thorns gene. Based on this information, what is this plant's phenotype for the thorns trait?
A. Having thorns
B. No thorns
Answer:
The answer is having thorns, because the recessive allele is having thorns goes by the letter R, which is represented that way.
Explanation:
How do mutations lead to variation?
Answer:
A
Explanation:
Mutations (we don't really know why they happen) but they change certain bases and base pairs (A has to match w T and C with G) and so they change the genetic code of DNA.
That also can possibly result in answer C but not necessarily but A is always true.
What five conditions must be happening in order for evolution not to occur in an ecosystem?
answer:
1,no mutation
2,random mating
3,no gene flow
4,infinite population size
5,no selection.
What tool can be used to measure the motion of planets in our solar
system?
A. Astrolabe
B. Microscope
C. Ruler
D. Compass
Answer:
the answer is astrolabe
Answer:
A. Astrolabe
(I don't have enough words, just ignore this)
What is digested in the small intestine including the nutrients, substance, enzyme and final product of the thing being digested
Answer:
The pancreas and gland cells of the small intestine secrete digestive enzymes that chemically break down complex food molecules into simpler ones. or Complete digestion takes place in the small intestine as it finally absorbs the nutrients. The end products of digestion are amino acids, fatty acids, glycerol, and glucose.
Explanation:
If you're talking about the end product go with the latter
1) Two tubes are inoculated from the same tube containing a bacterial culture. The cultures are then transferred every day for two months. All of the media and growth conditions are the same in every tube. After two months of cultivation, the fitness and genotype frequencies of the populations in the two tubes are compared. The fitness of the two cultures is the same, but the genotype frequencies are very different in the two cultures. How is this possible
Answer:
The correct answer would be - Genetic drift within the small populations in the test tubes resulted in different genotype frequencies
Explanation:
Genetic drift is not like natural selection or adaptive radiation as it is a phenomenon that is random and does not takes place on the basis of genes being beneficial or harmful for survival. Genetic drift depends on any kind of error when the shift occurs in successive generations. Genetic drift also altered the allele frequency of a particular characteristic in future generations.
In this experiment, the sample cultures are transfer from one test tube to another on daily basis for a time period of two months There must be some sampling error that occured and caused the change in allelic frequency as natural selection cannot undergo under such a small population or within such short life span or time period only genetic drift can cause it.
are two epigenetic mechanisms that can prevent DNA from being accessible to transcription molecules. When the DNA is unwound, molecules that bind to determine when and how to transcribe genes. When gene transcription begins, a special type of protein known as binds to a promoter and assembles RNA. An activator is a transcription factor that binds to and promotes transcription. A repressor is a transcription factor that binds to and prevents transcription. Even if a gene is transcribed, its ultimate translation and expression can be silenced by
Answer:
microRNAs
Explanation:
Within the cell, there are different types of regulatory non-coding RNAs (ncRNAs) such as microRNAs (miRNAs), small-interfering RNAs (siRNAs), piwi-interacting RNAs (piRNAs), long ncRNAs, etc., which are able to regulate gene expression. miRNAs are evolutionary conserved small ncRNAs (typically 18-23 nucleotides in length) known to inhibit gene expression by base-pairing with complementary target mRNAs, and thus trigger RNA interference (RNAi) pathways (e.g., mRNA degradation, inhibition of translation, etc). These miRNAs form part of a ribonucleoprotein complex named RNA-induced silencing complex (RISC) that acts to trigger RNAi mechanisms.
Use the dichotomous key to identify the leaf pictured above.
Mimosa
White oak
Scarlet oak
American beech
Answer:
C. Scarlet Oak
Explanation:
USA Test Prep
A dichotomous key is an essential scientific means by which the various organisms can be identified by the observable traits and attributes. The dichotomous key contains various questions related to the group of organisms that can have those traits.
Scarlet oak is the leaf in the picture.
How to identify the leaf based on key?The leaf of the Scarlet Oak is of the simple type that is it does not have smaller leaflet divisions and is attached to the petiole or the stem of the plant.Only one leaf at a time is attached to the petiole and not in bunches. The leaf of the plant is lobed that is has various protrusions like pointed or round.The leaf of the plant is pointed at the tips and shows that it belongs to the Scarlet Oak plant.Thus, option C is correct.
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PLEASE HELP ASAP!!!!Suppose a bacterial culture were mixed with recombinant plasmids
containing a gene for resistance to penicillin. The bacterial culture was then
treated with penicillin. Which of the following statements is NOT true? *
1. Those bacteria that contain the plasmid will survive.
2. The penicillin will kill the bacteria that were transformed.
3. The gene for antibiotic resistance is expressed in the bacteria that survive.
4.Those bacteria that are successfully transformed will survive.
Answer: B is the right answer, or #2
Explanation: Got this on a test, I got it wrong but my teacher showed the right answer LOL
Which of the following BEST represents competition among organisms?
A. zebras staying together in groups to avoid predators
B. different types or species of trees trying to obtain sunlight and water
O
c. a walking stick insect resembling its environment
D. a cheetah hunting and killing a gazelle for food
Answer:
B
Explanation:
Define the following:
Cellular Respiration+ fermentation
Explanation:
Fermentation is another anaerobic (non-oxygen-requiring) pathway for breaking down glucose, one that's performed by many types of organisms and cells. In fermentation, the only energy extraction pathway is glycolysis, with one or two extra reactions tacked on at the end.
consist of either one or two long chains of repeating units called nucleotides. DNA and RNA are the two main types.
Answer:
In case of both DNA and RNA, in general it is the nucleotides.
Nucleotides basically consists of three parts. The sugar(deoxyribose in DNA and ribose in RNA, both of which are pentose sugars), nitrogenous base and a phosphoric acid group.
The only component that varies in the nitrogenous base. There are five different types.
1.Adenine(A)
2.Guanine(G)
3.Cytosine(C)
4.Thymine(T)
5.Uracil(U)
1 and 2 are known as purines.
3, 4 and 5 are known as pyrimidines.
In DNA, A base pairs with T by means of a double hydrogen bond and G pairs with C by means of a triple hydrogen bond.
In RNA, A base pairs with U by means of a double hydrogen bond and G pairs with C by means of a triple hydrogen bond.
What is the difference between abundant and scarce resources?