Which of the following following terms best describes air?
A)element
B)compound
C)mixture
D)none of the above
Answers
Final answer:
Air is best described as a mixture, specifically a homogeneous mixture, with its components uniformly mixed at a molecular level and varying in composition. The correct option is C.
Explanation:
The term that best describes air is C) mixture. Specifically, air is a homogeneous mixture, which means that the different components that make up air (primarily nitrogen, oxygen, and other gases like argon and carbon dioxide) are mixed uniformly at a molecular level. Unlike a compound or an element, the composition of a mixture can vary, and its components can be separated by physical means, though not simple mechanical means like sorting or filtering.
Elements are pure substances that cannot be broken down into simpler substances by chemical means. An example of an element would be iron, which is purely composed of iron atoms. A compound is made up of two or more elements chemically bonded together in a fixed ratio, such as water (H₂O), which consists of hydrogen and oxygen combined in a 2:1 ratio.
Related Questions
In peas, the allele for round seeds (r) is dominant to the allele for wrinkled seeds (r). what would be the genotype and phenotype ratios of offspring from a cross between rr and rr individuals?
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The cross between RR and rr is all Rr, all will have rounds seeds.
Hope this helps! :)
The genotype and the phenotype ratio of the cross between two homozygous recessive parents will be 100% homozygous wrinkled seeded-plants.
What is the genotype and phenotype?
The genotype of an organism is the complete set of its genetic material. Genotype of an organism can also be used to refer to all the alleles or variants of an individual which it carries in a particular gene or the genetic location.
Phenotype of an organism refers to an individual's observable traits, such as its height, eye color, plant characters, and blood type. An organism's phenotype is determined by both their genotype and the environmental factors.
In the cross between two homozygous recessive parents with wrinkled seeds, the genotypic and phenotypic ration of the F1 generation will be 100% homozygous recessive wrinkled seeded-plants.
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A 1-year-old infant is pale, but the physical examination is normal. blood studies reveal the infant's hematocrit is 24%. which question by the nurse to the parents would be most useful in helping to establish a diagnosis of anemia?
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1. " What's the infant usually daily diet?"
2. " Is the infant on any medication?"
3. " What's the pattern and appearance of bowel movement?"
4. " Did the infant receive phototherapy for Jaundice?"
Hope it helps.
Dna methylation promotes what other chemical alteration of chromatin to suppress gene expression? histone deacetylation histone phosphorylation histone ubiquitylation dna phosphorylation dna ubiquitylation
Answers
The DNA methyltransferase and proteins that bind to methylated DNA are associated with histone deacetylase. Those proteins form complexes with the proteins involved in deacetylation of histones and therefore, when DNA is methylated, nearby histones are deacetylated, which results in repression of transcription.
The client with major depression and suicidal ideation has been taking bupropion 100 mg po 3 times daily for 5 days. assessment reveals the client to be somewhat less withdrawn, able to perform activities of daily living with minimal assistance, and eating 50% of each meal. at this time, the nurse should monitor the client specifically for which behavior?
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Applying how are photosynthesis and cellular respiration related?
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A peculiar sensory sensation often preceding the onset of a seizure is called:
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Aura is perceptual disturbance experienced by some with migraines or seizures before either the headache or seizure begin. It is often manifests as the perception of a straight light, an unpleasant smell or confusion thought.some people experience aura without subsequent seizure
What is the significance of mendel's experiments to the study of genetics?
Answers
The significance of Mendel's experiments in the study of genetics is Mendel's revelation significantly increased our understanding of how genes are passed down and inspired the creation of novel experimental techniques.
Who was Gregor Mendel?Gregor Mendel uncovered the basic principles of inheritance through his study on pea plants. He concluded that genes are inherited from each parent as separate, paired units.
Mendel observed how parental genes separated and if they showed up as dominant or recessive qualities in the children. Mendel created three laws of inheritance that characterized the transmission of genetic features through pea plant breeding before anybody knew genes even existed.
Mendel's revelation significantly increased our understanding of how genes are passed down and inspired the creation of novel experimental techniques.
Therefore, Mendel's discovery greatly expanded our understanding of how genes are handed down and encouraged the development of novel experimental procedures, which is the relevance of Mendel's experiments in the study of genetics.
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What detail is left unresolved at the end of the selection? the porter?
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Which factor most affects the order of amino acids in a protein?
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Two species of beetles are both herbivores on the same host plant, and the presence of either beetle species reduces the population growth of the other. the relationship between these beetles is best described as
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Antibodies to common microorganisms have been developed by
a. infancy
b. adolescence
c. childhood
can someone help me find the answer and understand.
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Individuals with anorexia nervosa and bulimia nervosa differ in the
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Anorexia nervosa and bulimia nervosa are both eating disorders, but the main difference is that individuals with anorexia have a tendency to skip meals, while individuals with bulimia go through a cycle of binging (overeating) followed by vomiting. People with anorexia are usually extremely underweight and with an unhealthy figure, while the physical appearance of people with bulimia can be “normal” or sometimes underweighted.
Answer:
Explanation:
Imma be honest, I'm just trying to pass health class at this point so I don't know the answer... XD
Most bryophytes, such as mosses, differ from all other plants in that they _____. see concept 29.3 (page 626)
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All bryophytes are very small and commonly grow in moist shaded areas in the hills. They complete their vegetative phase on land but water is necessary for their sexual reproduction. In addition bryophyte are non vascular plant and they lack cuticle and stomata.
Which type of rna brings the information in the genetic code from the nucleus to the ribosomes of the cell? *?
Answers
The answer is mRNA.
Hope this helps!
-Payshence xoxo
why does the warm air rise up and over the cold air at a cold front
Answers
BRAINLIESTTT ASAP!!!
How do you recognize substances that have gone through physical or chemical changes?
Answers
Examples of Chemical Changes
Burning wood
Souring milk
Mixing acid and base
Digesting food
It produces a new substance. Example - mixing HCl and NaOH to make salt and water. Another example is - when an ice cube melts to form water. In short, the only difference is its form.
Good luck :)
The major effect of genetic drift is..
A) a reduction in genetic variability.
B) an increase in genetic variation to accommodate changes in abiotic conditions.
C) no change in population size but an increase in favorable alleles.
D) a reduction in population size and an increase in genetic variability.
Answers
Genetic drift results in a reduction in genetic variability. Depending on the situation, there may be a reduction or increase in the population. So, the answer is A.
Application and Discussion: We mentioned ABO blood typing during the lesson. Let’s consider a different way that knowledge of macromolecules could be useful in forensic science.
Please answer the following questions:
One type of macromolecule:
The function of that macromolecule:
How it is related to forensic science (i.e. provide an example and explain its use in forensic science):
Answers
It is the most common macromolecule in the biochemistry, and they are biopolymers. DNA is related to forensic science in that, it helps to identify individual apart from one another. If there is any case of murder, DNA is used to detect the suspect.
DNA profiles are used to match crime scene.
Answer:
One type of macromolecule: DNA (deoxyribonucleic acid)
The function of that macromolecule: it is the macromolecule that contains the genetic information of living organisms.
How it is related to forensic science (i.e. provide an example and explain its use in forensic science): DNA is used in forensic science for many applications, one of them is to identify a criminal form the samples of hair, saliva, blood etc. collected from a crime scene.
Explanation:
A macromolecule is a large molecule that is made up of smaller subunits.
DNA is a macromolecule that is made up of nucleic acids.
DNA is most commonly used in forensic science as it is commonly present in the samples such as saliva, hair, blood, etc. that can be easily obtained from a crime scene.
This DNA can then be used to match the person with the help of DNA fingerprinting.
The advantage is that even a small amount of DNA in the samples can be utilized as the technique of polymerase chain reaction (PCR) exists.
The ability to change the position of your body quickly and control your body's movement is called:
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The ability to change the position of your body quickly and control your body's movement is called agility.
What are the advantages of agility?The advantages of agility are as follows:
It significantly enhances your coordination and body balance.It improves movement skills along with awareness of the body.It increased cognitive function and flexibility.It remarkably prevents injury and improves recovery time. It helps the body to maintain proper alignment and posture.The process of agility is achieved by numerous activities which facilitate the skills of athleticism. This ability of the body significantly augers and encourages the body in order to learn the overall process of maintaining the accurate placement of the body.
Therefore, agility is the ability to change the position of your body quickly and control your body's movement.
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Why does DNA need to be copied into mRNA?
Answers
mRNA will serve as reference book that contains information as the DNA and its sequence is complementary to the DNA template.
The transfer of information in a DNA strand to a new molecule of messenger RNA is known as transcription. Thus, the process of transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors. However, DNA is copied into mRNA because mRNA will serve as reference book that contains information as the DNA and its sequence is complementary to the DNA template.
Why does the thermosphere have the highest temperature of all the atmosphere layers?
Answers
Answer:
the suns radiation strikes it first
Explanation:
~apex
In cells, the production of proteins is handled by the ribosomes and endoplasmic reticulum, while the processing and packaging of proteins is handled by the _________ body.a)golgib)nuclearc)plastidd)cytoplasmic
Answers
Golgi is an organelle in the cytoplasm and it is a part of the endomembrane system. Functions of Golgi apparatus are transporting, modifying, and packaging proteins into vesicles for delivery to targeted destinations.
Repair of damaged neurons can be assisted by certain neurotrophic factors secreted by the
Answers
Hope this helps!
-Payshence xoxo
Please help! I'll give you a medal! Sorry it might be a lot!
What color do you want your insects to be? ______________________________________
A. How would you describe the process of artificial selection? ____________________
___________________________________________________________________
___________________________________________________________________
B. How will mutations be useful in achieving your goal color? _____________________
___________________________________________________________________
______________________________________________,
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2. It is a process whereby a breeder of animals or plant cultivator, chooses to breed between different species for their characteristics that are inheritable.
3. Mutations is an evolutionary process that helps a specie better adapt to their environment. DNA changes causes by mutation can help lighten or darken colour pigment. Like in the dark-coated mouse, where 9 changes to the DNA coding for color makes its fur lighter for better camouflaging.
List and describe the role of the 3 types of rna.
Answers
There are three RNAs with a role in the synthesis of protein.
mRNA, or messenger RNA, is the link between a gene and a protein. The main role of this ribonucleic acid is in transcription (”reading“) of DNA. The DNA is transcribed by RNA polymerase, and the resulting product of this process is mRNA. This form of RNA can be modified post-transcriptionally with methylguanosine caps and polyadenosine tails. RNA carries the genetic information which is copied from DNA and the information has a form of three-base code (“words”), codons. Each of these codons specifies a particular amino acid.
tRNA or transfer RNA is the molecule with the main function in translation by "decoding" the mRNA message during this process. Each type of amino acid has its own type of tRNA and also has a three-base sequence (anticodon) that can bind complementary with the codons in the mRNA.
rRNA or ribosomal RNA is a main component of ribosomes. rRNA associates with a set of proteins to form ribosomes which catalyze the assembly of amino acids into polypeptide chains (protein).
There are also a few more types of RNA which have a regulatory function like, microRNA or siRNA.
The study of the distribution of plants and animals throughout the world is called:
a. biochemistry
b. biogeography
c. evolutionary development
d. paleobiology,
Answers
Biogeography is the study of the distribution of animals and plants throughout the different places in the world. This study focuses on the communities of organism in the different areas of the Earth and how they are distributed to these areas. The purpose of this study is to explain the process and mechanism of the distribution of the different species in the world.
According to most scientists, what may be the result of the emission of the greenhouse gases carbon dioxide and methane into earth's atmosphere?
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What were the conditions like on early Earth? (Be specific)
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- Such oxygen-poor conditions would have resulted in an atmosphere filled with noxious methane, carbon monoxide, hydrogen sulfide, and ammonia.
- The dense early atmosphere, dominated by the "greenhouse gases" carbon dioxide and water vapor, trapped the radiation of the early Sun, while the solid crust radiated volcanic heat from the interior.
On early Earth, conditions were harsh with extreme heat, lack of oxygen, strong radiation, and significant geological upheaval and volcanic activity. The atmosphere was anoxic and filled with reduced inorganic chemicals, quite different from today's environment. The earliest life forms, prokaryotes, were adapted to these extreme conditions.
Conditions on Early Earth
The conditions on early Earth were very different from what they are today. The atmosphere was anoxic, meaning it lacked oxygen, and primarily composed of reduced inorganic chemicals. This reflects a stark contrast to the oxygen-rich atmosphere we have now. It is believed that early cells that formed on Earth were adapted to survive in these harsh conditions. These conditions include extreme heat, the absence of oxygen, and exposure to strong radiation.
Additionally, the geological landscape of early Earth was characterized by tumultuous geologic upheaval and frequent volcanic activity, which would later play a crucial role in the development of the planet's surface and atmosphere. The early atmosphere, largely made up of gases like methane, ammonia, and water vapor, differed vastly from today's nitrogen and oxygen-rich atmosphere.
The first organisms, known as prokaryotes, appeared during this tumultuous time and were well-suited to the high-temperature environments possibly around hydrothermal vents and protected from strong radiation beneath the ocean depths or Earth's surface. Evolution eventually led to microbial mats, which are considered to be some of the earliest forms of life, dating back to about 3.5 billion years ago.
Organelles have their own genomes. when chloroplast dna is sequenced and compared to genomes from members of the cyanobacteria, the sequence is nested within cyanobacteria. this is strong evidence for the hypothesis that:
Answers
The chloroplast originated as a symbiotic cyanobacterium that became permanently incorporated into its host.
which situation is associated with shear?
A. new rock formations
B. convergent boundaries
C. frequent shallow earthquakes
D. volcanic mountain ranges
Answers
Answer:
Frequent shallow earthquakes
Explanation:
Shear is the response of a rock to deformation usually by compressive stress and forms particular textures.
During an earthquake when the earth shakes it produces a super shear earthquake in which the propagation of the rupture along the fault surface occurs at speeds in excess of the seismic shear wave (S-wave) velocity.
The mechanisms of shearing depend on the pressure and temperature of the rock and on the rate of shear which the rock is subjected to.