If the amount of carbon-14 in the original sample had been 48 grams, about how much carbon-14 would
have been left after 17,100 years?
Answer:
don't know i have the same question
Explanation:
If the amount of carbon-14 in the original sample had been 48 grams, 6 gm carbon-14 would have been left after 17,100 years
Half-lifeThe amount of time required for a quantity to fall to half its value as measured at the beginning of the time period.
The half-life (t½) of C-14 is 5700 years, which means that after 5700 years half of the sample would have decayed and half would be left as it is.
After 5700 years ( first half-life)[tex]\frac{48}{2} = 24[/tex] mg decays and 24 g remains left.
After another 5700 years ( two half-lives or 11400 years)[tex]\frac{24}{2} = 12[/tex] mg decays and 12 g remains left.
After another 5700 years ( three half-lives or 17100 years)[tex]\frac{12}{2} = 6[/tex] mg decays and 6 g remains left.
Thus, after three half-lives or 17100 years, 6 g of C-14 will be left.
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Planarians are a group of ____________ , free-living flatworms that capture their food via a process of wrapping around it, entangling it in slime, and pinning it down before a ____________ extends from the mouth, bringing the prey into a gastrovascular cavity where ____________ digestion occurs.
Explanation:
Planarians are a group of Turbellaria, free-living flatworms that capture their food via a process of wrapping around it, entangling it in slime, and pinning it down before a prey into a gastrovascu lar cavity where free-living flatworms that capture extends from the mouth, bringing the prey into a gastrovascular cavity where free-living flatworms that capture extends from the mouth, bringing the digestion occurs.
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In this assignment, you will think of scientific questions that will help you better understand the role of DNA and chromosomes in the expression of heritable traits in an organism. You will then conduct research to answer these questions. Finally, you will compose a typewritten document that states your questions and provides your answers.
Answer:
1. What is the relationship between chromosomes and DNA? The chromosome is a molecule formed by a chain of DNA associated with proteins. Together, they form a group of molecules directly responsible for heredity.
2. What is heredity? It is the biological process where the genes present in a DNA are transmitted by parents to their children, through the division of gametes. These genes carry the codes that form the genotypic and phenotypic characteristics, which allows a similarity between parents and children to occur.
3. What is the role of proteins associated with the DNA molecule that makes up the gene? Proteins are responsible for keeping the DNA line tightly compressed, maintaining the chromosome structure. In addition, they control the activities of the genes present in this DNA molecule, being essential in maintaining heredity.
4. How do chromosomes participate in gene transmission? As mentioned above, genes are part of DNA and DNA is the molecule that makes up chromosomes, in this case, chromosomes are molecules loaded with genes. In the human body, cells have 46 pairs of chromosomes, with the exception of gametes that have half that number. During the reproductive process, the gametes (reproductive cells) divide and produce a new being. The mother's gametes unite with the father's gametes to form a new being. Each gamete has 23 chromosomes, which contain the genes responsible for transmitting the characteristics.
Explanation:
This is what I used. :)
What is photosynthesis?
Answer:
the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates by green plants, algae, and certain bacteria, using energy from the sun and chlorophyll.
Explanation:
what is the equation for photosynthesis? why is it important for the plants to have both cellular respiration and photosynthesis(think about the equations)
Answer:
The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen.
Photosynthesis produces the oxygen to replenish oxygen that is used up by living organisms during respiration. Carbon dioxide produced during respiration is one of the reactants plants need to perform photosynthesis. Photosynthesis and cellular respiration are both part of a mutually beneficial relationship.
what is an orgasim to the human body
Answer :i- The orgasm is widely regarded as the peak of sexual excitement. It is a powerful feeling of physical pleasure and sensation, which includes a discharge of accumulated erotic tension.
Explanation:
8. Which organisms act as a bridge between the nitrogen in the atmosphere and the nitrogen on land?
Answer:
Well, Bacteria plays a key role in the nitrogen cycle, but also some species of nitrogen-fixing bacteria are free-living in soil or water, while others are beneficial symbionts that live inside of plants.
Explanation:
Bacteria act as a bridge between the nitrogen in the atmosphere and the nitrogen on land.
• Nitrogen moves into the living world with the help of microbes, that is, bacteria. The bacteria transform atmospheric nitrogen, that is, N2 into usable biological forms by the process of nitrogen fixation.
• Some nitrogen-fixing bacteria are free-living in water or soil, while some are beneficial symbionts, which reside within the plants.
• The nitrogen-fixing bacteria capture the atmospheric nitrogen by transforming it to NH3 that can be taken by the plants and are utilized to produce organic molecules.
• The nitrogenous molecules are passed onto animals when they consume plants. These gets incorporated within the body of the animal and are excreted in the form of urea in urine.
Thus, bacteria act as a bridge between the nitrogen in the atmosphere and the nitrogen on land.
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Which best compares the roles of nitrogen fixing bacteria and certain decomposers in the nitrogen cycle?
Answer:
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Explanation:
6 Infer Why do you think loess can be carried further
than sand?
Answer:
During deflation,wind removes the top layer of fine sediment or soil. ... Loess can be carried further than sand because loess weighs less than sand so wind can pick loess up easier.
Below is a sequence from a template strand of DNA. Write the sequence of the mRNA that would be transcribed from this. Be sure to label the 3’ and 5’ ends.
DNA:3’ A G G T C T T C A C 5’
mRNA:
Answer:
In the transcription of DNA to mRNA, for the DNA sequence 3'-AGGTCTCAC-5' corresponds to an mRNA sequence 5'-UCCAGAAGUG-3'.
Explanation:
Transcription is the process by which a strand of mRNA, needed to direct protein synthesis in the cytoplasm, is synthesized from a strand of DNA.
The sequence of nucleotides in the RNA chain depends on the sequence of bases in the DNA strand, being placed according to the complementarity of nitrogenous bases, where a purine is complemented with a pyrimidine.
In RNA, the thymine base is replaced by Uracil, the complementary base to adenine of DNA.
ADN mRNA
A U
T A
C G
G C
For this reason:
DNA: 3’ A G G T C T T C A C 5’
mRNA: 5'-U C C A G A A G U G-3'
what is the oxygen used for in photosyntheiss
Answer:
Explanation:
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Consider the trumpet player in the marching band from the beginning of this activity. How do the nervous system and musculoskeletal systems work together to help the band member walk in formation while playing an instrument?
Answer:
There is almost no research on whether musical instruments produce the airborne particles—or aerosols—that can transmit the novel coronavirus. So it’s impossible to know whether keeping 2 meters away is enough to stay safe from a trumpet at full blast!
Explanation:
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There is almost no research on musical instruments produce the airborne particle or aerosols which can transmit the novel coronavirus. So it’s impossible to know whether keeping 2 meters away is enough to stay safe.
what is corona virus ?Corona Virus is a type of virus that can affect thousands of people across the world. Symptoms will be seen within 2-14 days after exposure to the virus.
People with these symptoms may have Corona Virus which include Fever or chills, Cough, Shortness of breath or difficulty, breathing, Fatigue, Muscle or body aches, Headache, New loss of taste or smell, Sore throat, Congestion or runny nose, Nausea or vomiting, Diarrhea
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How does a developing fetus change in the third trimester?
Answer:
hope it helps..
Explanation:
During the third trimester, the fetus continues to grow in size and weight. The lungs are still maturing. The fetus starts to position itself head-down. By the end of the third trimester, the fetus is about 19 to 21 inches long and weighs about 6 to 9 pounds.
My wife craves pickles and ice cream when she’s 8 months pregnant. Imagine This: She is sitting on our softest couch (hard for even me to get up out of). How could I, as her husband, reduce the energy barrier she needed to “climb” in order for her to fulfill that craving? Explain a minimum of 3 ways
Answer:
Bring her pickles and ice cream
Carry her to the pickles and icecream
Spoon feed her pickles and icecream
The biosphere is.
the place on earth where all life occurs
the area inside the earth
the entire Arctic region
the entire Antarctic region
Answer:
The place on earth where all life occurs is the correct answer
Explanation:
Hope this helps you
Crown me as brainliest:)
Answer:
The place where living things live and get oxygen.
Explanation:
hope my answer will help you.
A scientist is using a species of green algae to study the electron transport chain in photosynthesis. He uses a laser to inactivate all of chlorophyll A in the algae but leaves chlorophyll B intact (case 1). In a separate experiment, the scientist applies a chemical to the algae that inhibit PS I but do not affect PS II (case 2).
Which of the following results is expected?
A)in case 1, only PS I completely loses function; in case 2, no proton gradient is produced.
B)In case 1, only PS I completely loses function; in case 2, a proton gradient is still produced.
C)In case 1, both PS I and PS II completely lose function; in case 2, no proton gradient is produced.
D)In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.
Answer:
D) In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.
Explanation:
The light dependent reaction of photosynthesis, which produces the ATP and NADPH needed in the light independent stage of the process, includes complexes of proteins and pigments called PHOTOSYSTEMS. These photosystems (I and II) are key to the functionality of the light dependent reactions in the thylakoid.
The major pigment present in both photosystems is CHLOROPHYLL A, which absorbs light energy and transfers electrons to the reaction center. Chlorophyll B is only an accessory pigment meaning it can be done without. Hence, if all of the chlorophyll A is inactivated in the algae but leaves chlorophyll B intact as in case 1, both PS I and PS II will lose their function because Chlorophyll A is the major pigment that absorbs light energy in both photosystems.
In case 2, if PS I is inhibited and PS II is unaffected, a PROTON GRADIENT WILL STILL BE PRODUCED because the splitting of water into protons (H+) and electrons (e-) occurs in PSII. Hence, H+ ions can still be pumped into the inner membrane of the thylakoid in order to build a proton gradient even without the occurrence of PS I.
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Answer:
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Explanation:
Answer:
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Explanation:
Unlike plant-like protists, animal-like protists are always
A-autotrophs
B-heterotrophs
C-sexual reproducers
D-asexual reproducers
Answer: B heterotrophs
Explanation: animal-like protists (known as protozoans, or 'first animals') share heterotrophic behaviors, meaning they acquire their nutrients by exhibiting a very animal-like hunting behavior and consume bacteria or other smaller protists.
Answer:
heterotrophs
Explanation:
The use of solar panels has increased in the last ten years. A benefit of using solar energy would include
Answer: using less fossil fuel to meet energy needs
Explanation: i got it right
Flagella proteins are found in the extracellular matrix of lung tissue. How do the cells of the lung detect these proteins? a. complement system b. toll-like receptors c. eosinophils d. NOD e. helper T-cells
Answer:
The correct answer is b.
Explanation:
TLRs are transmembrane type proteins 1, they are abundantly expressed in fibroblasts and epithelial cells, as well as in cells of the immune system, including macrophages, dendritic cells, B and T lymphocytes, and their expression is regulated by pathogens, cytokines, microenvironmental factors, and possibly endogenous ligands. Due to their location and the type of ligands that bind them, these receptors have been divided into two large groups: the TLRs of cytoplasmic membranes (TLRs 1, 2, 4, 5, 6 and 10) and the TLRs of endosomal membranes (TLRs 3 , 7, 8 and 9). TLR5 located in the basolateral membrane of epithelial cells recognizes flagellin, a structural protein that makes up flagella.
Both of the processes shown use and apply biological processes. Both processes are
examples of
4 points
genes for
microorganisms producing human
insulin
dough
A
B
biotechnology
genomics
O imaging technology
transgenic organisms
Answer:
This question is incomplete.
But from what is provided, the answer is biotechnology
Explanation:
The use genes of microorganisms to produce human insulin involves the use of biotechnology via the process of recombinant DNA technology. Recombinant DNA technology involves the joining together/ligation of two or more DNA molecules (in this case the DNA of the microorganism and the DNA sequence coding for insulin in humans) of different species in a microorganism. The microorganisms used here are called transcription vector. This is because the microorganisms are only used to duplicate/produce the insulin and the insulin are not expressed in the microorganisms. E. coli and Saccharomyces cerevisiae are two most common microorganisms used in the production of insulin.
Match the age group with the recommended therapeutic consideration. Place the letter of the age group in the column labeled matching thats is appropriate for the the therapeutic consideration
Answer:
E
Explanation:
e
What is the problem which fermentation is able to FIX?
Cell has a limited supply of NAD
Cell has a limited supply of oxygen
Cell has too few mitochondria
Cell has too many glucose
Answer:
Cell has a limited supply of NAD+Explanation:
Cellular respiration occurs in the cytoplasm, where glucose is broken down for energy processing. Energy is produced by aerobic respiration in the presence of oxygen, whereas anaerobic respiration can be carried out in an oxygen-deprived environment.
Fermentation is one kind of anaerobic respiration- here, the cells use glucose to generate a Net 2 molecules of ATP from the 6carbon sugar. Glucose is first converted to pyruvate, which is oxidized in a complex process. While 4 ATP are produced in fermentation, 2ATP are used in regenerating NAD+ from NADH2.
Two types of fermentation include lactic acid fermentation and alcoholic fermentation. These occur in single-celled, and multicellular microbes.
What is the function of cholesterol in the cell membrane?
A. To allow substances too pass through
B. To prevent the hydrophobic tails from sticking together
C. To make more room inside the cell membrane
D. To help the cell recognize self and non self
The function of cholesterol in the cell membrane is C. To make more room inside the cell membrane.
What is the importance of the cholesterol?Cholesterol affects the bilayer structure of biological membranes in a variety of ways. It alters lipid bilayer fluidity, thickness, compressibility, water penetration, and intrinsic curvature.
Cholesterol molecules control the fluidity of the cell membrane, which allows the cell to maintain its shape. If cholesterol is missing from the cell membrane, excess fluidity may lead to cell lysis, or the breakdown of the cell.
As a result, cholesterol is required for cell membrane stability.
In conclusion, the correct option is C.
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I don't know what I am supposed to do or how to do it?
Which of the following explains why the Multiple-Use Sustained-Yield Act was necessary?
O Increased demand for lumber posed a threat to the nation's forests.
O Public Interest in public forests had declined and needed to be raised.
O Clear-cutting of forests was deemed important to provide for residential areas.
o Forests being opened to Industries led to too great a depletion on many resources.
Has the research described in this article been
peer reviewed?
Answer:
Meaning, example of Peer reviewed article
Explanation:
Peer review refers to procedure of scrutinizing a researcher's scholarly work, by other experts & specialists in the similar field.
This provides an important advantage of this is proper scientific, logical verification of the study.
Examples of some peer reviewed journals : Journal of child & adolescent Psychiatric Nursing
Answer:
the article does not say
Explanation:
edge 22
Plz help!!!!!
• Motor driven plow
• Electric lights
• Sewer system
• Vaccines
What do these technologies have in common?
A.
They are all very expensive to make.
B.
They all help improve quality of life.
C.
They are only used to help poor people.
D.
They are all made from natural resources.
Answer:
B
Explanation:
They all do help improve quality of life.
Answer:
The best answer for this question Is B. Due to it being the only thing that matches all of the requirements.
One student filled three-fourths of a flask with water and closed its mouth with a rubber stopper. He put a glass tube through the hole in the rubber stopper. The flask was heated on a Bunsen burner. After some time the boiling water was forced up through the glass tube as shown below. (1 point)
Image of a flask sitting on a Bunsen burner, the flask is 3/4 filled with water, the flask is closed with a rubber stopper that has a glass tube through it, water is rising to approximately 1/3 of the glass tube.
The student's experiment demonstrates the formation of
wells
caves
geysers
sinkholes
Answer: It's geysers
Answer:
geysers is correctamungo
Explanation:
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