Answer:
wait what grade are u in?
How old would this fossil be if only 1/128 of C-14 was detected in it?
Answer:
not sure but mark that guy brailest ^
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help! If a virus has an incubation period of 12-24 months, then it is most likely --
my best guess would be LTBI (latent tuberculosis infection)
most incubation periods are in the range of 3 weeks to 3 months, though some cancer viruses have incubation periods of 10 years long. exc..
tuberculosis: 6-24 months
aids: 1-15 years
leukemia: 2–12 years
good luck!
The text box below contains facts about salmon:
juvenile salmon migrate from freshwater streams and rivers to the ocean.
in the ocean, juvenile salmon d.r.i.n.kk. salt water.
Special cells on the salmon's gills called chloride cells help the salmon to excrete salt.
How do populations of juvenile salmon respond to changes in salinity as they migrate?
The juvenile salmon utilize special structures but do not alter their behavior.
The juvenile salmon alter their behavior and utilize special structures.
The juvenile salmon utilize special structures to alter their behavior.
The juvenile salmon alter their behavior but do not utilize special structures.
Answer:
due to the salmons body and biology the salinity doesnt matter because they can change whats around them using the salt from inside their body
Explanation:
they both utilize and alter behavior
The populations of juvenile salmon respond to changes in salinity as they migrate the juvenile salmon utilize special structures to alter their behavior. Therefore, option C is correct.
What is salinity ?The amount of dissolved salt in a body of water is known as salinity. It makes a significant contribution to conductivity and influences many aspects of the chemistry of natural waters as well as the biological activities that take place there.
In soils and seas, primary salinity is a natural occurrence. Salt lakes, salt pans, salt marshes, and salt flats are a few examples of naturally occurring salty landscapes. Salting caused by human activity, typically land development and agriculture, is known as secondary salinity.
Salinity is the buildup of salt to a degree that harms the built environment and the ecosystem in general. While there are many areas of the Australian terrain that are naturally salty, human activity has the potential to raise salt levels. Water and salinity go hand in hand.
Thus, option C is correct.
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in drosophila melanogaster, the common fruit fly, curved wings "I" and purple eyes "r" are two linked recessive genes found on chromosomes 2. The dominant wild type alleles for those genes are long wings"L" and red eyes "R"
a)describe the expected ratio of offspring in the f2 generation of these genes were located on different chromosomes
b)the results in the f2 generation of these flies were: 40 long winged, red eyes; 40 curved winged, red eyes; 10 long winged, purple eyes, and 10 curved winged, red eyed. how many map units apart are the genes for curved wings and purple eye color?
Answer:
the other person is right, he had messed up before saying that 60 x 40 = 100, but 60 + 40 = 100. Then I had told him that his answer was wrong and that he should put the answer as 240 instead since 60 x 40 = 240 and not 100.
Explanation:
The expected ratio of offspring in the f2 generation of these genes were located on different chromosomes is 25%
What are chromosomes?A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones.
Chromosomes allow DNA to be accurately copied during these cell divisions. So one more time. Chromosomes are found in the nuclei of our cells and allow DNA to be accurately copied during cell division.
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA).
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Select the correct answer. Which statement is an example of a focused topic? A. Fruits from rainforests are known to heal diseases that affect people around the world. B. Fruits from rainforests are enjoyed by people all over the world. C. Fruits from rainforests are part of a healthy diet. D. Fruits from rainforests in the Amazon are effective remedies for the common cold.
Answer:
I think D
Explanation:
Answer:
D. Fruits from rainforests in the Amazon are effective remedies for the common cold.
Explanation:
Match the body systems and interaction descriptions:
1. Circulatory and Respiratory
2. Digestive and Circulatory
3. Nervous, Muscular, and Skeletal
4. Circulatory and Integumentary
5. Muscular and Digestive
6. Respiratory and Muscular
7. Circulatory and Skeletal
8. Excretory and Circulatory
9. Nervous and Integumentary
10. Muscular and Circulatory
_. Nutrients pass into the circulatory system to be carried to body cells
_. Lungs supply oxygen carried by blood to cells of the body
_. Production of blood cells in bone marrow
_. Chewing, swallowing and movement of food through the digestive tract
_. Pumping of the heart & blood
_. Daily movement and coordination
_. Kidneys remove wastes from blood
_. Cooling through dilation of blood vessels near the surface of the skin
_. Sense of touch
_. Movement of the diaphragm in breathing
2. Nutrients pass into the circulatory system to be carried to body cells
1. Lungs supply oxygen carried by blood to cells of the body
7. Production of blood cells in bone marrow
5. Chewing, swallowing and movement of food through the digestive tract
6. Pumping of the heart & blood
3. Daily movement and coordination
8. Kidneys remove wastes from blood
4. Cooling through dilation of blood vessels near the surface of the skin
9. Sense of touch
10. Movement of the diaphragm in breathing
There are numerous parts to the human body. Every physical portion serves a distinct purpose.
What is body systems and their interaction?There are numerous parts to the human body. Every physical portion serves a distinct purpose. To better comprehend how the human body's components interact with one another and work together as a whole, scientists divide the body into systems. A group of bodily parts that cooperate to carry out a specific task is known as a body system.
For instance, the integumentary system, that shields the body from its surroundings, is made up of the skin, hair, and nails. Another instance of an organ that guards the body is the immune system.
1. Lungs supply oxygen carried by blood to cells of the body
2. Nutrients pass into the circulatory system to be carried to body cells
3. Daily movement and coordination
4. Cooling through dilation of blood vessels near the surface of the skin
5. Chewing, swallowing and movement of food through the digestive tract
6. Pumping of the heart & blood
7. Production of blood cells in bone marrow
8. Kidneys remove wastes from blood
9. Sense of touch
10. Movement of the diaphragm in breathing
Therefore, there are numerous parts to the human body. Every physical portion serves a distinct purpose.
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DeShawn wants to conduct a scientific study on how land-clearing in his city may have affected the quality of the water. Which source of information would be most valuable to his research? A. a survey given to the people of the city ten years ago on the possible effects of land-clearing on water B. the opinion of a neighbor who has some knowledge on how to test city water for impurities C. a recent city government report with data regarding how clean the water supply is D. a recent political article stating that the water of the city should be filtered and cleaned Reset Next Question
Answer: i think that the answer is C
Explanation:
The source of the information that should be most valuable to the research should be option C.
What is research?
It means that the development of the new knowledge should be done or there is the usage of the existing knowledge for generating the new conceptsm methods, and understanding. It involved the synthesis and the analysis of last research for resulting the new or the creative outcomes.
So based on this, the option c should be correct.
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living in an unhealthy community will lead to.
Explanation:
if you mean dirty or not cleaned in a while then you can get sick from the lingering germs, and you can get sick or die if something like a gas pipe has rusted open from not being cleaned. there are many other examples.
Which of the following statements about cell respiration is true?
A In the electron transport chain, Oz is converted to CO2.
B Glycolysis splits sugar to produce pyruvate and FADH2-
C Electrons leave the electron transport chain in a molecule of water (H20).
D
Both B and C are correct.
The statement which is true about cell respiration is; Choice B: Glycolysis splits sugar to produce pyruvate and FADH2-
Definition of terms:
Cellular respiration is a process used by all living organisms to convert glucose into energy.
Cellular respiration is a collection of three unique metabolic pathways: glycolysis, pyruvate oxidation, the citric acid cycle, and the electron transport chain.
Glycolysis; This pathway is anaerobic and takes place in the cytoplasm of the cell. This pathway breaks down 1 glucose molecule and produces 2 pyruvate molecule. A process which releases FADH2- in the process.Pyruvate Oxidation: In eukaryotic cells, the mitochondria is the site of pyruvate oxidation. The release of CO2 is a characteristic of this step.The Electron transport chain: The electron transport chain is the final component of aerobic respiration and is the only portion of glucose metabolism that uses atmospheric oxygen.Electrons are rapidly transferred from one component to the next to the endpoint of the chain, where the electrons reduce molecular oxygen, O2 producing water in the process.
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(iv) Measles. Mumps, Diphtheria Polio odd one
Answer:
polio
Explanation:
please mark me as brainliest
In cats, the gene for Calico (multicolored) cats is an x-linked trait that is
CODOMINANT. Females that receive a "B" and an "R" gene have black and orange
splotches on white coats. Males can only be black or orange, but never calico.
A female calico's genotype is XBXR
Cross a female calico cat with a black male. (Complete a Punnett square)
What are the results of the cross?
25% Black and male, 0% Calico Male, 25% Calico female
50% Black and male, 50% Calico female.
50% Orange and male, 50% Female Black
Answer:
Considering the whole progeny (100%), there will be
25% Black male kittens, XBY0% Calico Male kittens25% Calico female kittens, XBXRExplanation:
Available data:
The gene for Calico (multicolored) cats is an x-linked trait and codominantCalico Females receive a "B" and an "R" gene, and have black and orange splotches on white coats. Their genotype is XBXR.Males can only be black or orange, but never calico. Their genotype is XBY and XRYCross: a female calico cat with a black male
Parentals) XBXR x XBY
Gametes) XB XR XB Y
Punnett square) XB XR
XB XBXB XBXR
Y XBY XRY
F1) Among the whole progeny:
2/4 = 50% will be black (female XBXB and male XBY) 1/4 = 25% will be Calico (female XBXR) 1/4 = 25% will be Orange (male XRY)Among females:
1/2 = 50% of females will be black, XBXB 1/2 = 50% of females will be Calico, XBXRAmong males:
1/2 = 50% of males will be black, XBY 1/2 = 50% of males will be orange, XRYDescribe how the movement of water landforms form
Answer:
The moving of water causes erosion, deposition and much more!
Explanation:
Water moving across the earth in streams and rivers pushes along soil and breaks down pieces of rock in a process called erosion. The moving water carries away rock and soil from some areas and deposits them in other areas, creating new landforms or changing the course of a stream or river.
The image shows a cell placed in an aquatic environment. Using your
knowledge of water tonicity, what type of environment was the cell placed
in, and what effect will this have on the cell?
The environment outside of the cell is hypertonic, and the cell will swell.
The environment outside of the cell is hypertonic, and the cell will shrink.
The environment outside of the cell is hypotonic, and the cell will swell.
The environment outside of the cell is hypotonic, and the cell will shrink.
Answer:
the water will go out of the cell
Explanation:
The temperature of the earth's surface during different seasons is also affected by
the passage of the sun's rays through the atmosphere.
True
False
Answer:
True
Explanation:
The sun's light rays produce heat which is actually the only reason why we are not living in a block of ice.
Winter is when we are farther from the sun thus it is colder than the summer when we absorb more of the sun's rays.
The statement "the temperature of the earth's surface during different seasons is also affected by the passage of the sun's rays through the atmosphere" is definitely true.
What is an Atmosphere?An atmosphere may be characterized as a type of layer that significantly consists of a mixture of numerous gases that surrounds any celestial body or planet like the earth, mars, etc. The atmosphere of the earth is composed of about 78% nitrogen, 21% oxygen, and one percent other gases.
The rays of the sun typically produce a significant amount of heat. Due to this, we are not living in a block of ice and get a source of energy directly from the sun.
During winter, the sun is farther from the surface of the sun, so we receive less amount or indirect light but in summer, we absorb more of the sun's rays. Due to this, the temperature increases and we feel extremely hot outside.
Therefore, the statement "the temperature of the earth's surface during different seasons is also affected by the passage of the sun's rays through the atmosphere" is definitely true.
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URGENTTT
Which of the following best describes how independent assortment results in inherited variations within a species and how it contributes to evolution?
A Independent assortment results from the copying of DNA during cell division and causes variations that are sometimes beneficial to a species
B Independent assortment results from the binary fission of a single cell and causes mutations that can be beneficial or harmful to a species
C Independent assortment occurs during mitosis and causes uncontrolled cell division which is harmful to a species
D Independent assortment occurs when chromosomes separate during meiosis and causes variations that can be beneficial or harmful to a species
Answer:
D Independent assortment occurs when chromosomes separate during meiosis and causes variations that can be beneficial or harmful to a species
Explanation:
During meiosis, the homologous chromosomes separate and segregate independently of each other. This process is referred to as 'independent assortment'. In consequence, different gene variants or 'alleles' localized in homologous chromosomes segregate independently of each other during gamete formation, thereby one particular gamete has an equal probability to carry either of these segregating alleles. Independent assortment generates genetic variation in the gametes, which can be beneficial or deleterious in a given environment.
The option that best describes how independent assortment results is D Independent assortment occurs when chromosomes separate during meiosis and causes variations that can be beneficial or harmful to a species
What is independent assortment ?Independent assortment is a phenomenon that occurs during meiosis, which is the process of cell division that produces gametes (sex cells). During meiosis, the chromosomes are randomly sorted into the gametes. This means that the alleles (different forms of a gene) on different chromosomes can be inherited together or separately.
This random assortment of alleles can lead to new combinations of traits, which can be beneficial or harmful to a species.
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What best describes the structure of dna
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
A double helix. It best describes the structure of a DNA molecule. Moreover, the DNA is not a single stranded and it does not comprise amino acids
Some argue that solar power should be the main energy source for the United States. Which argument could be used against this idea? A. It contributes to global warming. B. It can only be produced in sunny areas. C. It is a nonrenewable resource. D. It releases greenhouse gases.
Answer:
A. It contributes to global warming
Explanation:
Solar power is the power of the future and is an essential nonrenewable source of energy for man. Solar power is driven by the incoming solar energy in the form of solar rays. Solar power is eco-friendly and doe not cause any harm can be sued in the summer season and has ample scope for greenhouse gases. As per the statement, the solar power should be used as the main energy source in U.S can be contradicted by saying it contributes to global warming.Perhaps no one cares more about being able to see in the ocean than do divers. The Cayman Islands, Bonaire and the Bahamas are all popular dive destinations due to both submarine features, such as coral reefs, and water clarity. Under the best of circumstances, visibility in these locations is between 50 ft (15 m) to 150 ft (45 m). Based on this, and what you have learned about sound, write a paragraph describing those ways in which humans and marine organisms use sound for some underwater tasks and light for others.
Answer:
Humans and marine organisms use sound finding depth of the ocean and objects.
Explanation:
Humans and marine organisms use sound for some underwater tasks such as finding depth of the ocean and objects. Human use sonar which is a device used to explore the ocean and animals use echolocation to find food and identify objects that comes in their way. Sonar is present in submarine uses sound waves to detect objects that comes in their way so both humans and marine organisms use sounds.
What does the term "feedback inhibition” describe?
Answer:
Feedback inhibition, in enzymology, suppression of the activity of an enzyme, participating in a sequence of reactions by which a substance is synthesized, by a product of that sequence.
Which word describes the process by which a human transmits a disease to an animal?
Answer: reverse zoonosis or anthroponosis.
Explanation:
Answer:
a zoonosis
Explanation:
is an infectious disease caused by a pathogen (an infectious agent, such as a bacterium, virus, parasite or prion) that has jumped from an animal (usually a vertebrate) to a human. Typically, the first infected human transmits the infectious agent to at least one other human, who, in turn, infects others
Introspection is one of the many sleeping disorders experienced
by people with sleep apnea.
Select one:
True
False
Answer:
The statement is false.
Explanation:
Sleep apnea is a respiratory disease characterized by the fact that people who suffer from it habitually snore, have repeated stops of breathing (apneas) and drowsiness during the day. As a consequence, patients who suffer from it cannot rest well during the hours of sleep.The obstruction of breathing causes a decrease in oxygen levels in the body, the persistence of this lack of oxygen could cause pulmonary hypertension and a future right-sided heart failure or myocarditis. Introspection, on the other hand, is the immediate reflective capacity of the human mind to know its own states; it is not associated with sleep apnea.
Which of the following molecules comes from the food we eat and is needed for energy?
A) amino acids
B) glucose
C) oxygen
D) protein
E) fiber
You have a circular plasmid containing 9 kb of DNA, and you wish to map its EcoRI and BamHI sites. When you digest the plasmid with EcoRI and run the DNA on a gel, you observe a single band at 9 kb. You get the same result when you digest the DNA with BamHI. When you digest with a mixture of both enzymes, you observe two bands, one 6 kb and the other 3 kb in size. Explain these results. Draw a map of the restriction sites.
Answer:
A nick is created between G and A in GAATTC when using Eco R1 site while a nick is generated between G and G in GGATCC when Bam H1 is used. The difference in the nicks created is the main reason you observe two bands when you digest the circular plasmid with a mixture of both
Explanation:
Circular plasmid containing : 9 kb of DNA
Eco R1 and Bam H1 are known as restriction sites in DNA ( i.e. special sequences found in a DNA ) hence they can be specifically cleaved by the restriction enzymes enabling the insertion of a gene. that is why you will get a same result when you digest the Plasmid with either Eco R1 or Bam H1
but A nick is created between G and A in GAATTC when using Eco R1 site while a nick is generated between G and G in GGATCC when Bam H1 is used. The difference in the nicks created is the main reason you observe two bands when you digest the circular plasmid with a mixture of both
I NEED HELP ON BOTH ANSWER AS QUICKLY AS POSSIBLE!!
Bc
Answer:
What do you need help with?
Writing Assignment So, you have learned about how the denaturation of proteins works during lecture, and you have seen examples in these videos. Now you will write a 2-3 page discussion of protein denaturation putting all that together Make sure you cover both the academic side (lecture knowledge) and practical side (what is done and observed in the lab). Make sure the answers to the following questions are contained in your report. Do NOT just answer them separately, but rather incorporate them seamlessly in your writing. This is a very broad topic, so comprehensive coverage is hardly expected, but you should demonstrate a good beginner's understanding. As usual, reference any and all resources you use.
a. What are the various levels of organization that any protein structure may have that gives it its 3-dimentional shape?Which of these changes during denaturation?
b. For each change made to a protein solution that you have seen or read about how might it affect the interactions that are involved in a protein's shape?
c. What is the difference between precipitation of a protein and its denaturation? How might you tell the difference?
d. If changing the pH of an enzyme solution greatly reduces the activity of that enzyme without precipitation, how could you tell in the lab if it were the result of denaturation or just going to a pH that is just not a good one for the enzyme? And how would a change in pH impact or even stop enzyme function without denaturation? (Consider the enzymes that are active in your stomach, such as pepsin-discussed in Wikipedia.)
e. For changes that precipitate a protein, are some more likely than others to be denaturation?
f. Etc. If you find one aspect of what you've see more interesting, go ahead and learn more and expand that section of your report and keep the other sections more basic.
Solution :
Denaturing may be defined as the process where the protein they lose their shape and their function because there is a change in the pH level or in the temperature. Although the amino acids sequence also known as primary structure, it does not change. But the shape of the protein might change a little bit so much that it can become dysfunctional in which protein is considered to be denatured.
The enzyme, Pepsin, the breakdown protein in our stomach only operates at a very low pH level. At higher pH level, the pepsin's configuration the way the polypeptide chain is being folded up in a 3 dimension begins to change. The pH level of the stomach is maintained at a low level to ensure that pepsin continues for the digest protein and that it does not denature.
There are 4 levels of the protein structure --- they are the primary, the secondary, the tertiary and the quaternary.
The primary protein is a particular sequence of amino acids in each of the polypeptide chain that makes the protein. The final protein structure depends on this sequence.
Secondary structure arise from the interactions between the neighboring or nearby the amino acids as polypeptide starts folding into 3D form.
The tertiary structure is the most important of structural levels in determining.
The quaternary structure also applies to the proteins made from more than one polypeptide chain.
Which term indicates that a single gene has two or more alleles present in a population?
A. Genotype
B. Point mutation
C. Polymorphism
D. Pleiotrophy
Genetic polymorphism is the existence of multiple alleles of a single gene.
What are genes?Genes are regions of DNA which code for a particular protein or any other gene product.
Genes can exists as a single copy or as multiple copies.
Alleles are alternate forms of a particular gene.
A single gene that has two or more alleles present in a population is known as genetic polymorphism.
Therefore, multiple alleles of a single gene is known as genetic polymorphism.
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What is the transfer of
heat from one object to
another through direct
contact?
Answer:
condiction
Explanation:
conduction is the transfer of heat between substances that are in direct contact with each other.
Pls someone help its a very easy question also don’t worry about the dot I accidentally did that
how and why does DNA change during meiosis
Answer:
When recombination occurs during meiosis, the cell's homologous chromosomes line up extremely close to one another. Then, the DNA strand within each chromosome breaks in the exact same location, leaving two free ends. Each end then crosses over into the other chromosome and forms a connection called a chiasma.
Explanation:
name two characteristics that all these animal share ( frog, buck, doves, lizard, dragonflies )
Answer:
They all have a beating heart, and a brain
Explanation:
Beating the heart and a brain is the two characteristics that all these animal shares frog, buck, doves, lizard, and dragonflies.
What are the different characteristics of animals?Frogs are cold-blooded animals and are classified into the class of amphibians, they are vertebrate animals with backbones.
The lizard was included in the class reptilia, they are creeping and burrowing terrestrial animals situated on the land, and also have scales on their body. Similar to the frog, they are also cold-blooded animals having a backbone.
The major classification of the animals is done by the presence of a backbone, which differentiates them in vertebrates and invertebrates.
Therefore, in the given question all the animals share common feature of having a heart and brain.
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