Answer:
Yes
Explanation:
Because uranium decays by alpha particles, external exposure to uranium is not as dangerous as exposure to other radioactive elements because the skin will block the alpha particles. Ingestion of high concentrations of uranium, however, can cause severe health effects, such as cancer of the bone or liver.
Which of the following techniques would be best for observing the bacterial nucleoid? a. Scanning electron microscopy b. Dark field microscopy with fluorescently labeled DNA C. Bright field microscopy with Gram stained cells d. Fluorescence microscopy using a fluorescent DNA-staining dye 9. Justify your answer to question 8 in 1-2 sentences. In your justification, clearly explain why at least one of the incorrect answers is wrong
Fluorescence microscopy using a fluorescent DNA-staining dye would be the best technique, option (d) is correct.
Fluorescence microscopy using a fluorescent DNA-staining dye would be the best technique for observing the bacterial nucleoid. The bacterial nucleoid is the region within the bacterial cell where the genetic material, including DNA, is located. Fluorescent DNA-staining dyes, such as DAPI (4',6-diamidino-2-phenylindole) or SYTOX, specifically bind to DNA and emit fluorescence when exposed to specific wavelengths of light.
This technique allows for specific visualization of the bacterial nucleoid within the cell. The fluorescence signal emitted by the DNA-staining dye can be detected and captured using a fluorescence microscope, enabling researchers to observe the structure and organization of the bacterial nucleoid, option (d) is correct.
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The complete question is:
Which of the following techniques would be best for observing the bacterial nucleoid?
a. Scanning electron microscopy
b. Dark field microscopy with fluorescently labeled DNA
c. Bright field microscopy with Gram stained cells
d. Fluorescence microscopy using a fluorescent DNA-staining dye
1. How can embryology be used to explain evolution?
2. What are fossils? How are fossils used to explain evolution?
Answer: 1. Embryology, the study of the development of the anatomy of an organism to its adult form, provides evidence for evolution as embryo formation in widely-divergent groups of organisms tends to be conserved. ... Another form of evidence of evolution is the convergence of form in organisms that share similar environments. 2. Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. mark brainliest
Explanation:
PLEASE HELP, ILL GIVE YOU A BRAINLY OR WHATEVER ITS CALLED!!! Why would two parents with dominant traits be able to pass down recessive traits, but two parents with recessive traits cannot pass down dominant traits? (explain your answer with a few sentences)
Answer:
because the traits are not dominants it in the name negus
Explanation:
what type of bond holds the sugar and phosphate backbone together?
The type of bond that holds the sugar and phosphate backbone together is the phosphodiester bond.
What is a phosphodiester bond?
A phosphodiester bond refers to the linkage between the hydroxyl group on the 3' carbon atom of one nucleotide and the phosphate group on the 5' carbon atom of the next nucleotide in the RNA or DNA backbone. This bond is formed by a dehydration reaction that links the two functional groups and eliminates a water molecule.
Bonds between the sugar and phosphate molecules in a polynucleotide chain are known as phosphodiester bonds. In the DNA double helix, these bonds create the backbone that connects the nucleotide monomers.
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one characteristic of plasmodium and other members of the group it belongs to (such as the causative agents of toxoplasmosis and cryptosporidiosis) is
The one characteristic of Plasmodium and other members of the group it belongs to (such as the causative agents of toxoplasmosis and cryptosporidiosis) is that they are all unicellular eukaryotic organisms that reproduce asexually by mitosis.
Plasmodium, which causes malaria, is a unicellular eukaryotic organism, which means it is made up of a single cell with a nucleus and other organelles, similar to other eukaryotic cells. Toxoplasmosis is caused by the parasite Toxoplasma gondii, which is also a unicellular eukaryote.
Cryptosporidiosis is caused by the unicellular parasite Cryptosporidium parvum, which is another unicellular eukaryotic organism. All of these organisms reproduce asexually by mitosis, which means that the parent cell divides into two identical daughter cells. This type of reproduction is different from sexual reproduction, in which two cells combine their genetic material to create a new organism.
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How many kingdoms are represented by the organisms shown
200g of water at 90degree Celsius is mixed with 100g of water at 30 degree Celsius. What is the final temperature (C of water =4.2jkg-1 k-1
Answer:
70 °C
Explanation:
Since heat lost by 200 g of water = heat gained by 100 g of water
-mc(T - T') = m'c(T - T")
where m = 200 g,T' = 90°C, m' = 100 g,T" = 30°C and T = final temperature of mixture, c = specific heat capacity of water = 4.2jkg-1 k-1.
Substituting the values of the variables into the equation, we have
-mc(T - T') = m'c(T - T")
-200 g(T - 90 °C) = 100 g(T - 30 °C)
(T - 90 °C) = 100 g(T - 30 °C)/-200 g
(T - 90 °C) = -0.5(T - 30 °C)
T - 90 °C = -0.5T + 15 °C
collecting like terms, we have
T + 0.5T = 90 °C + 15 °C
1.5T = 105 °C
T = 105 °C/1,5
T = 70 °C
What part of the brain controls the following activity: you breathe faster when you run.
a]cerebrum
b]cerebellum
c]pons
d]medulla oblongata
Answer:
The answer is D because it is medulla
Explanation:
Hope u like it
Answer:
c:ponds
Explanation:
The pons, while involved in the regulation of functions carried out by the cranial nerves it houses, works together with the medulla oblongata to serve an especially critical role in generating the respiratory rhythm of breathing. Active functioning of the pons may also be fundamental to rapid eye movement .
what can cause a decrease in soil quality of farm land that is left without crops during some months every year
Answer:
Let the land lie fallow for a season
Explanation:
In Agriculture when a farmer has some problems with the quality of his soil due to continued planting all year round without allowing the soil rest, there seems to be loss of some of the nutrients that help crops grow and he is unable to grow crops on his field.
The best option is to allow the land low fallow with grasses and other plants growing and replenishing the soil.
Explain in a paragraph how speed and velocity impact blood splatter
Please no links!
Answer:
The force of the blood hitting a surface for medium velocity blood spatter is between 5 and 100 feet per second. This causes the droplets of blood to be smaller in diameter, and more like a spray. High velocity blood spatter: ... This causes the pattern of the blood to be similar to a fine spray.
Explanation:
10
What type of boundary has plates that slide past each other?
A) convergent
B
transform
C divergent
D
tension
Answer:
B
Explanation:
Transform. It like slides past eachother and transforms
What conclusion about Japan's farmland can be made by studying the map?
A)
Japan is dominated by wasteland.
B)
Tea is grown in all parts of Japan.
C)
Most of Japan's farm land is devoted to rice.
D)
Wheat and oats are the dominate crops in Japan.
Stream characteristics
Analyze the graph and sort the following characteristics as those which appear at the headwaters and mouth of the stream.
-Channel roughness is high
-Channel size is smaller
-Slope is lower
-Discharge is higher
-Flow velocity is more
Characteristics that appear at the headwaters of the stream:
Channel roughness is highChannel size is smallerSlope is lowerCharacteristics that appear at the mouth of the stream:
Discharge is higherFlow velocity is moreAt the headwaters of a stream, the channel is typically narrower and shallower, resulting in higher roughness due to more frictional interactions with the channel walls and bed. The smaller channel size is often a result of the limited volume of water at the upper reaches of the stream. Additionally, the slope of the stream is usually steeper at the headwaters, leading to a faster flow velocity as water moves downhill.
As the stream progresses towards the mouth, the accumulated water from tributaries increases the overall discharge, resulting in a higher volume of water flowing through the channel. This increased discharge leads to a higher flow velocity as the water spreads out in a larger channel. The slope of the stream generally decreases as it nears the mouth, causing the water to flow more slowly.
Therefore, channel roughness, smaller channel size, and steeper slope are characteristic of the headwaters, while higher discharge and flow velocity are characteristic of the mouth of the stream.
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Plants adapt and respond to stimuli in the environment in order to survive.
A. True
B. False
Answer:
verdedrao
Explanation:
Answer:
A. True
Yes, plants do adapt and respond to stimuli to survive.
if you cross rryy and rryy pea plants, what fraction of the offspring will have round yellow peas? r = round, r = wrinkled, y = yellow, y = green
Out of the four possible combinations, 2 of them (RY and rY) will result in offspring with round yellow peas. The fraction of offspring with round yellow peas would be 1/2 or 0.5.
If you cross the pea plants with genotypes rryy and rryy, where "r" represents the dominant allele for round peas and "y" represents the dominant allele for yellow peas, the offspring will all have the genotype RrYy.
When two heterozygous (RrYy) individuals are crossed, there are four possible combinations of alleles that can occur in the offspring: RY, Ry, rY, and ry. Among these combinations, RY and rY represent the genotype for round peas, and Ry represents the genotype for yellow peas.
Therefore, out of the four possible combinations, 2 of them (RY and rY) will result in offspring with round yellow peas. This means that 2 out of 4, or 1/2, of the offspring will have round yellow peas.
In fraction form, the fraction of offspring with round yellow peas would be 1/2 or 0.5.
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Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected?
Answer:
The rate of transpiration would decrease
Explanation:
the petroleum jelly would block the stomata of the leaves resulting in decreased transpiration rates
Petroleum jelly would inhibit the loss of moisture out of the stomata cells. Therefore, the rate of transpiration would be decreased.
What is transpiration?Transpiration exists the procedure of water movement via a plant and its evaporation from aerial parts, such as leaves, stems, and flowers. Water exists essential for plants but only a small amount of water brought up by the roots is utilized for growth and metabolism. The remaining 97–99.5% exists lost by transpiration. An example of transpiration exists when a plant absorbs water in its roots.
Hence, Petroleum jelly would inhibit the loss of moisture out of the stomata cells. Therefore, the rate of transpiration would be decreased.
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According to Darwin, an organism that is very successful at living and reproducing has a high level of: A). Genetic Equilibrium B). Altruistic Ability C). Fitness D). Hormones
Answer:
Hormones because without hormones there will no living humans on the world because two people having intercourse together they can make another human being
__________ information on where and when a gene will be transcribed during development; usually upstream (before) of the coding region; includes the promoter.
Regulatory information on where and when a gene will be transcribed during development; usually upstream (before) of the coding region; includes the promoter.
Regulatory information is the information that specifies where and when a gene will be transcribed during development, generally located upstream of the coding region, and includes the promoter. A promoter is a regulatory region of DNA located upstream of a gene that initiates gene transcription and therefore plays a crucial role in gene expression. Transcription factors, small molecules, or environmental factors activate or repress the promoter, affecting the level of gene expression.
The gene promoter is a crucial element in gene expression, and the right promoters must be located in the appropriate place and at the proper time to regulate gene expression. Regulatory sequences upstream of the gene also have a significant impact on gene expression, allowing for fine-tuning of gene expression levels at the transcriptional level.
Therefore, the regulatory information includes the promoter and specifies where and when a gene will be transcribed during development.
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Impermeable clay layers are called are called 1.5 points Save Answer and permeable layers that transmit groundwater
Impermeable clay layers are called aquitards and permeable layers that transmit groundwater are called aquifers. The management of aquifers is essential for ensuring a sustainable supply of water, especially in areas where the water supply is limited. In conclusion, impermeable clay layers are called aquitards and permeable layers that transmit groundwater are called aquifers.
Aquitards are the geologic formations that prevent or limit the movement of groundwater. In other words, they are the layers of rocks or sediments that have low hydraulic conductivity. They do not permit the flow of groundwater and trap it beneath them. Aquifers, on the other hand, are the layers of rocks or sediments that can transmit water through them. They have high hydraulic conductivity, which allows groundwater to move through them easily. They can be made of materials like sandstone, limestone, and gravel.The groundwater flow is essential for many natural systems, including rivers, wetlands, and lakes. Moreover, groundwater also plays an important role in supplying drinking water for people and irrigating crops. The management of aquifers is essential for ensuring a sustainable supply of water, especially in areas where the water supply is limited.In conclusion, impermeable clay layers are called aquitards and permeable layers that transmit groundwater are called aquifers.
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1. Does normal serum have bactericidal properties?
2. Why are tears and saliva potential biohazards?
3. What can you conclude regarding the effect of heat on the bactericidal properties of normal serum?
Yes, normal serum does have bactericidal properties as Serum contains various components of the immune system.
1. Yes, normal serum does have bactericidal properties. Serum contains various components of the immune system, including complement proteins, antibodies, and antimicrobial peptides, that can kill or inhibit the growth of bacteria. These components work together to defend the body against bacterial infections.
2. Tears and saliva can be potential biohazards because they can contain microorganisms, including bacteria and viruses, that may cause infections. Although tears and saliva contain certain components with antimicrobial properties, such as lysozyme and antibodies, they may not always provide sufficient protection against all pathogens. Additionally, if a person has an active infection or carries a contagious disease, their tears and saliva may contain a higher concentration of infectious agents, making them potential sources of transmission to others.
3. Regarding the effect of heat on the bactericidal properties of normal serum, heat can have variable effects. Heat can denature or destroy certain components of the immune system, such as proteins or antibodies, which may reduce the bactericidal properties of the serum. However, it is important to note that different components of the immune system may have different temperature sensitivities. Some components may be more heat-stable and retain their activity, while others may be more sensitive to heat and lose their bactericidal properties. The specific effect of heat on the bactericidal properties of normal serum would depend on the temperature and duration of heat exposure, as well as the specific components involved.
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recent molecular evidence suggests that the ancestors of the aboriginal australians may have arrived on that continent much earlier than originally thought, suggesting that there may have been two waves of human migration out of africa instead of only one. what is the best next step for scientists considering this alternative explanation? (2 points) convince the scientific community the new explanation is true. look for fossil evidence that might support this explanation. assume the molecular evidence is wrong since it does not fit with what is known. determine the amount of popular support for the theory.
The best next step for scientists considering the alternative explanation would be to look for fossil evidence that might support this explanation.
When faced with new evidence challenging an established understanding, scientists typically follow a systematic approach to investigate and evaluate the alternative explanation. In this case, the recent molecular evidence suggesting two waves of human migration out of Africa instead of one raises the need for further investigation.
One logical step is to search for fossil evidence that could provide additional support for the alternative explanation. Fossils can provide valuable insights into the timing and routes of human migration by examining skeletal remains and artifacts. By conducting archaeological excavations and analyzing fossil findings, scientists can gather direct evidence that can complement or corroborate the molecular evidence.
This approach allows scientists to gather multidisciplinary evidence from different fields, such as genetics and paleontology, to build a more comprehensive understanding of human migration patterns. By exploring and evaluating both the molecular evidence and fossil record, scientists can refine their understanding and develop a more complete picture of the ancient human migrations, contributing to our knowledge of human history and origins.
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Complete question:
recent molecular evidence suggests that the ancestors of the aboriginal australians may have arrived on that continent much earlier than originally thought, suggesting that there may have been two waves of human migration out of africa instead of only one.
what is the best next step for scientists considering this alternative explanation? (2 points)
convince the scientific community the new explanation is true. look for fossil evidence that might support this explanation.
assume the molecular evidence is wrong since it does not fit with what is known. determine the amount of popular support for the theory.
Select all the correct answers.
This model shows a human embryo. What can you determine about its development from the model?
It has a postanal tail.
It’s a vertebrate
It has pharyngeal arches.
It has fully developed organ systems.
From the model shown of a human embryo, the following facts about its development can be determined: It’s a vertebrateIt has pharyngeal arches It has a postanal tail.
A vertebrate is any member of the subphylum Vertebrata, which comprises organisms having a backbone or spinal column. Humans, as well as all other mammals, birds, reptiles, fish, and amphibians, are vertebrates.The pharyngeal arches are a collection of ridges in the pharynx that separate the pharynx into separate segments. They are structures in the embryo that go on to form several other structures in the head and neck region, including the jaws, teeth, and certain muscles of the face.
A postanal tail is an extension of the body that extends beyond the anus. It is characteristic of the development of most chordates, which includes both vertebrates and invertebrates. These tails contain muscles and other structures that enable the organism to move about its environment in a coordinated manner.From the model of the human embryo provided, none of the characteristics indicate fully developed organ systems. Hence, the correct options are:a) It’s a vertebrate) It has pharyngeal arches) It has a postanal tail.
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You leave a cracker in your mouth for 7 minutes without chewing. Hormones signal amylase to be released in your mouth and the cracker begins to dissolve. Which to systems ane being used in this scenario?
A.Endocrine & Immune
B.Digestive and Skeletal
C.Endocrine & Digestive
D.Digestive and Excretory
Which is involved in refraction? A. colors B. shadows C. speed of light D. absorption of light
the speed of light involved in refraction
help me fill out the second blank and it's not decrease bc I just got it wrong
Answer:
Remain the same
Explanation:
if you were to make a partial diploid with the genotype trp r trpoc / trprs trpo , what would happen? what is the dominance relationship between trpoc and trprs ?
The existence of two distinct alleles for the trp gene in the genotype trpr trpoc / trprs trpo shows that the organism is heterozygous at that locus. The trp gene has two copies: one with the "r" and "oc" alleles (trpr trpoc) and the other with the "rs" and "o" alleles (trprs trpo).
According to the partial diploid genotype, there are two copies of the trp gene, one on the regular chromosome (trpr trprs) and the other on an extra piece of DNA, which is sometimes referred to as an F' plasmid (trpoc trpo). The trpoc and trpo alleles are present on the F' plasmid.
The specific interactions between the trp alleles might change based on the nature of the alleles in terms of gene expression and dominance relationship. However, in most cases, the "r" allele would be dominant over the "oc" allele if the "r" allele is a functioning wild-type allele and the "OC" allele is a non-functional or partially functional allele. This indicates that while the "oc" allele may result in a diminished or nonexistent function, the "r" allele would typically result in the development of the functioning trp gene product.
The "rs" allele would be dominant over the "o" allele if it is a functioning wild-type allele and the "o" allele is a non-functional or partially functional allele.
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PLEASEEEE HELPPPPPPPPPPP
Professor Marcus has identified a new species of beetle in the Amazon Rainforest. The professor then investigates the process of gene expression in the cells of the beetle. Which is an expected result of the investigation?
A The processes of transcription and translation are unique in the beetle.
B The process of translation in the beetle is similar to other organisms, but involves a unique genetic code.
C The process of transcription in the beetle is similar to other organisms, but involves a unique set of nucleic acids in mRNA.
D The processes of transcription and translation, including the genetic code, are the same in the beetle as in nearly all other organisms.
Answer:
D The processes of transcription and translation, including the genetic code, are the same in the beetle as in nearly all other organisms.
Explanation:
Transcription is the cellular process where a specific DNA fragment called 'gene' is used as a template to create a complementary RNA molecule, usually a messenger RNA (mRNA). Subsequently, this mRNA is then used to synthesize a polypeptide chain (i.e., a protein) in the ribosomes. In eukaryotic organisms such as, in this case, beetles, both transcription and translation are essentially the same processes, and the genetic code used in the protein synthesis is also the same. The difference between beetles is the variation among DNA nucleotide sequences (genomes) which are used as templates to synthesize mRNAs, thereby their final products (proteins) are also different.
Read God's rules of health and sanitation for Israel in
Lev. 11:1-8 and Deut. 23:12-14. How might these
rules have protected His people from diseases such as
those caused by parasitic worms? Relate your answer
to the mode of transmission of many parasitic worms.
Answer:
It is transmitted in the body through contaminated food.
Explanation:
These rules of God's about health and sanitation have protected Israeli people from diseases which was caused by parasitic worms because these parasitic worms entered the body by not washing hands and contaminated food. These parasitic worms are present on the skin as well as in the food so the person can save itself from these parasitic worms if he or she wash hands properly before eating the meal and eat clean, fresh and healthy food.
blood that is short of oxygen is often coloured blue on diagrams. Which blood vessels should be coloured blue, those that carry blood to the lungs or those that carry it back to the heart?
Answer:
to the lungs
Explanation:
it needs to be reoxygenated so it goes back into the lungs
If a weather system with strong winds approached Lake Michigan
from the west, how might the speed of the winds change as the
system traversed the Lake?
If a weather system with strong winds approached Lake Michigan from the west, the speed of the winds might change as the system traversed the Lake. Lake Michigan is one of the largest freshwater lakes in the United States. Its sheer size and depth can have a significant impact on the weather and climate of the surrounding areas. The winds over Lake Michigan tend to be stronger and more turbulent than in the surrounding areas. When a weather system approaches from the west, it will typically encounter a sudden change in temperature and moisture content as it crosses over the lake.
As the weather system traverses the lake, the speed of the winds may change due to various factors. The winds can be affected by the shape and size of the lake, the temperature and moisture content of the air, and the rotation of the earth. In general, the winds over Lake Michigan tend to be stronger and more unpredictable than in other parts of the Midwest.
The speed of the winds can also change due to the effects of topography and the presence of other weather systems. If the weather system encounters a mountain range or other obstacles, the winds can be forced to accelerate or decelerate. Similarly, if the system encounters another weather system, it can be influenced by the interaction between the two systems.
Overall, the speed of the winds over Lake Michigan can vary significantly depending on a wide range of factors. While the lake can have a significant impact on the local weather patterns, it is also influenced by larger-scale atmospheric processes that are more difficult to predict.
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