if you measure the age of a fossil using 14c dating and determined its age to be about 17000 years old, how much of the rock should be made of 14N
Answers
Answer:
Geologists do not use carbon-based radiometric dating to determine the age of rocks. Carbon dating only works for objects that are younger than about 50,000 years, and most rocks of interest are older than that. Carbon dating is used by archeologists to date trees, plants, and animal remains; as well as human artifacts made from wood and leather; because these items are generally younger than 50,000 years. Carbon is found in different forms in the environment – mainly in the stable form of carbon-12 and the unstable form of carbon-14. Over time, carbon-14 decays radioactively and turns into nitrogen. A living organism takes in both carbon-12 and carbon-14 from the environment in the same relative proportion that they existed naturally. Once the organism dies, it stops replenishing its carbon supply, and the total carbon-14 content in the organism slowly disappears. Scientists can determine how long ago an organism died by measuring how much carbon-14 is left relative to the carbon-12.
The percentage of 14C is close to 12%
Carbon-14 is a radioactive isotope chemical element characterized by containing 6 protons and 8 neutrons. Its main function is the dating of organic specimens because it is present in all organic materials.
This is because once an organism dies carbon-14 slowly decreases over year as the lifespam of carbon dioxide is between 5000 and 30000 years. The way it decreases is determined by a mathematical function, but to make it easier there are graphs like the one below that show the process.
According to the graph showing the amount of carbon in an organic material when a fossil is 17,000 years old, the percentage of Carbon - 14 is about 12%.
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Related Questions
3. In what part of Australia are koalas found? What do they eat?
Answers
Answer: Koalas can be found in Eastern Australia - Through much of Queensland (From the Atherton Tablelands west of Cairns moving South), NSW, Victoria and a small section of South Australia. And Koalas eat Eucalyptus leaves.
Explanation:
how and why is the lion fish detrimental to the local food webs and ecosystems in these waters?
Answers
Which of these is NOT an organ found in the excretory system that helps to filter out liquid wastes in our body?
-kidneys
-lungs
-Skin
-heart
Answers
Explanation: This is asking for an organ in the excretory system. The heart is above
Answer:
the heart
Explanation:
Common vectors Include:
A) Bats
B) Mosquitoes
C) Ticks
D) All answers are correct
Answers
Answer:
B. Mosquitoes
Explanation:
Vector:
Mosquito/Anopheles
Disease caused:
Lymphatic filariasis Malaria
Culex
What are some of the main characteristics of life?
Answers
The Characteristics of Life Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered. Organisms have an enormously complex organization.
Explanation:
PLS HELP!! brainliest + extra points! it's easy but i didn't study tbh:)
Answers
Answer:
Guanine to Cytosine
Explanation:
G always matches C
A always matches T
Hope it helps
Plz mark Brainiest.
if an object has a mass of 580g what does it weigh
Answers
Always convert first to kg
So 580 g is 0.58 kg
Now it depends on which planet you are on, to what gravity the planet has. Lets go with Earth so 10N
0.58 x 10= 5.8
Ans) 5.8 N/kg
What is a change in an organism that allows for it to survive in its
environment?
A.homologous
B.vestigial
C.variation
D.adaptation
Answers
Answer:
d adaptation
Explanation:
its an adaptation because its a change that helps the organism survive
Mr. Shepherd is at a football game on a cold day. How does his body maintain a relatively constant body temperature? What is this process called?
Answers
Answer:
1. Mr. Shepherd maintain a relative constant body temperature by preventing loss of heat.
2 This process is called HOMEOSTASIS
Explanation:
Homeostasis is the process whereby living organisms maintain a stable internal environment despite changes in conditions to the external environment. It is necessary that the body undergoes this process in order to guarantee survival.
According to this question, Mr. Shepherd is at a football game on a cold day. This means that in order to maintain a stable internal temperature, the body must preserve heat in the body and prevent its loss via sweating.
The regulation of body temperature is maintain fundamentally by the thermoregulatory center located in the preoptic region of the hypothalamus, this process is called homeostasis, which is the balance that occurs in the internal environment.
The main thermoregulatory mechanism is the increase or decrease in blood flow to the skin, through vasodilation and vasoconstriction.
Thermal sensing cells or thermal sensors for heat and cold are located on the skin surface (peripheral receptors), in the pre-optic region of the anterior hypothalamus (central receptors) and in other parts of the body.When it is hot, blood circulation to the skin increases (it becomes red) and when it is cold it decreases (the skin becomes paler).In addition to blood flow, the body also uses sweat to regulate temperature, sweating evaporates water on the surface of the skin and heat is lost, thereby lowering body temperature.Therefore, we can conclude that the maintenance of body temperature is closely related to another important indicator, the internal environment (homeostasis).
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please help me i need it please
Answers
Answer:
first one is false
Explanation:
Which of the following is NOT used in logos?
Answers
Answer:
Legos i am pretty sure
Explanation:
Why does our body need to turn ADP into ATP?
Answers
I understand what earth outer layer is made of underneath the water and soil on the surface
Yes
Or
Not yet
Explain
Answers
The planet earth being a terrestrial planet is made up of rocks and hard rigid slabs of rocks called plates. These plates float on the flexible (asthenosphere) Mantel.
I understand that earth is a rocks planet and is made up of rocks and these rocks are called plates.
This uppermost layer or the crust of the lithosphere is composed of SIAL that is rocks made from aluminum and silicon, oxygen components. The layer lying below this is made from the semi-fluid matter called as upper mantel that is the asthenosphere which is partly molten and is said as molten rock. Due to the less dynamicity of this layer the above crust floats or drifts.Hence the water and soil in the lithosphere are characteristic of the crustal rocks.
brainly.com/question/21338656.
_trophs often make their own food using sunlight,
carbon dioxide, and water.
Any body please help please thank you so muchhhhh
Answers
Answer:
Autotrophs
Explanation:
Hope this is helpful
2. Wolves have genes that give them a very powerful sense of smell much more
powerful than humans, this is an adaptation by natural selection. The wolves that
reproduced more offspring with a better sense of smell thereby increasing the
frequency of those genes in the population that survived longer. Give an example of
adaptations in other organisms that may have resulted from variations that were
favored by natural selection.
Answers
Answer:
A good example may be represented by different shapes and sizes of beaks in finches living on different Galapagos islands
Explanation:
According to the evolutionary theory proposed by Darwin, natural selection is a mechanism that acts on heritable phenotypic variation among individuals within a population. Genetic variation can be considered as the primary source of heritable phenotypic variation. Those organisms that are better adapted for a particular environment will have more chances to survive and reproduce, thereby passing these heritable traits to the next generation. For example, during his work, Darwin observed that the shape and size of beaks in finch species from different islands in the Galapagos archipelago varied as a consequence, i.e., as an adaptation, to the availability of food resources present in each island.
An example of adaptations in other organisms that may have resulted from variations that were favored by natural selection. - The light-colored mice are an adaption favored by natural selection as they were able to live longer.
Adaptations are physical or behavioral traits that make an organism better suited to its environment. The inheritable variation comes from random mutations.
the example of such variations caused by natural selection are:
The Deer mouse adapted to the environment by developing a lighter color.The light-colored mice were able to live longer.Thus, The light-colored mice are an adaption favored by natural selection as they were able to live longer.
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what characteristics describes an old river
Answers
Answer:
Rivers possess different features as they age. Old rivers usually have a low stream (gentle) gradient and low erosive energy. They usually have broad U shape, the water is usually brown and they have flood plains. Seasonal floods are also common.
Elise is studying the electromagnetic spectrum. She knows that is shows waves in
order based upon their frequencies. Which of the following choices below, lists types
of electromagnetic waves from the lowest frequency increasing to a higher
frequency?
А
infrared, radio, microwave
B
radio, gamma, visible light
с
Gamma, visible light, X-rays
D
Visible light, X-rays, gamma
Answers
Answer:
D visible light , x-rays , gamma
At Happy Harry’s Laundromat, the dryer costs $1.50 for 10 minutes. At Jolly Judy’s Laundromat the dryer costs $2.25 for 15 minutes. Which laundromat offer the better deal?
Answers
What is the function of T-lymphocytes? Select all
that apply.
to assist other lymphocytes
to produce other lymphocytes
to kill cells infected with a virus or cancer
to help in the body's immune response
to circulate oxygen throughout the body
Answers
Answer:
to assist other lymphocytes
to kill cells infected with a virus or cancer
to help in the body’s immune response
Explanation:
Following are the functions of T-lymphocytes, here:
to assist other lymphocytesto kill cells infected with a virus or cancerto help in the body's immune responseWhat are T-lymphocytes?
T-lymphocytes, also known as T cells, are a type of white blood cell that plays a key role in the immune system. They are produced in the bone marrow and mature in the thymus gland.
One of the main functions of T-lymphocytes is to assist other lymphocytes, such as B cells, in the immune response. They do this by releasing chemicals that help to activate and coordinate the immune response, and by directly attacking infected cells.
T-lymphocytes also have the ability to kill cells that are infected with a virus or cancerous cells. They do this through a process called cell-mediated immunity, in which they recognize and bind to specific proteins on the surface of infected cells. Once they have bound to the infected cells, they release chemicals that kill the cells, helping to prevent the spread of the infection or cancer.
T-lymphocytes are an important part of the body's immune system and play a vital role in helping to protect the body against infections and disease.
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8. Which of these is the direct result of an error in the transcription of a DNA
nucleotide?
A. Amino acids do not bond to tRNA.
B. Transportation of mRNA does not occur.
C. The nuclear membrane is ruptured.
D. RNA sequence is incorrect.
CLEAR ALL
Answers
Answer:
D. RNA sequence is incorrect.
Explanation:
Genome editing can be defined as a high-tech process which avail scientists the opportunity or ability to remove (delete), replace and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.
Transcription can be defined as a process which typically involves re-writing the informations contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.
When a RNA sequence is incorrect, it leads to an error in the transcription of a DNA nucleotide.
This ultimately implies that, an error in the transcription of a DNA nucleotide is the direct result of an incorrect codon sequence (RNA nucleotides).
(d) Cells are treated with a compound that prevents the inactivation of kinase D . Researchers claim that Brec-WT cells treated with this compound will stimulate blood vessel-forming cell division to the same degree as Brec-MUT cells do in the absence of B . Based on the information provided, provide reasoning to support their claim.
Answers
Answer:
There are two kinds of communication in the world of living cells. Communication between cells is called intercellular signaling, and communication within a cell is called intracellular signaling. An easy way to remember the distinction is by understanding the Latin origin of the prefixes: inter– means “between” (for example, intersecting lines are those that cross each other) and intra– means “inside” (like intravenous). Chemical sign
Explanation:
As per the details provided, the correct reasoning to back the given claim would be as follows:
- Both cell types have active kinase D, which leads to the expression of A, and the expression of A stimulates the blood vessel-forming cell division by both cell types.
The correct reasoning to back the given claim that cells are intentionally handled using a compound that avoids the kinase's upregulation would be as mentioned above. In the given example, the use of Brec-WT cells shows that both the given cells contain kinase D in their activated form that causes the appearance of A. This appearance further results in the incitement of blood vessels which causes the division of cells through both kinds of cells.Learn more about "Cell" here:
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What characteristics of the molecules being transported determines how they will cross the membrane?
A. Polarity and size
B. Size and mass
C. Passive or active
D. Charge and structure
Answers
List two types of chemical erosion
Answers
Answer:Oxidation and Hydrolysis
Answer:
The most vivid examples of chemical erosion are caves and sinkholes created in areas with a lot of underground limestone that ends up dissolving from acidic groundwater.
Explanation:
Hydrolysis - the breakdown of rock by acidic water to produce clay and soluble salts. Oxidation - the breakdown of rock by oxygen and water, often giving iron-rich rocks a rusty-coloured weathered surface.
You can use either exampleswhat cellular processes happen during mitosis?
Answers
Answer:
the eukaryotic cell undergoes many phases to result in two daughter cells.
prophase
prometaphase
metaphase
anaphase
telophase
Answer:
A eukaryotic cell goes through a few (4) phases to split into two identical daughter cells.
Explanation:
Prophase, metaphase, anaphase, and telophase are the 4 phases.
1st phase: nuclear envelope disappears and chromosomes become visble
2nd phase: chromosomes line up at the middle of the cell (metaphase plate I believe it’s called), to get ready to divide.
3rd phase: replicated chromosomes split and move to different ends/poles of the cell.
4th phase: 2 nuclei form, including 2 identical daughter cells.
Hope this helps, my bio’s kind of rusty though so I’d research this more if I were you :)
Bacteria cells can be used to produce insulin for the treatment of diabetes in humans. Which best explains how the bacteria cells are able to produce insulin for humans? (8.L.2.1) *
A. The bacteria have been grown on a petri dish containing insulin.
B. The bacteria have been genetically engineered to contain the DNA needed to produce insulin.
C. The bacteria have been exposed to radioactivity to create mutant strains capable of producing insulin.
D. The bacteria have been grown on a petri dish containing sugar; the bacteria produce insulin in response to the sugar.
Answers
Answer:
Your answer is B), I took this quiz already.
The statement 'bacteria have been genetically engineered to contain the DNA needed to produce insulin'' BEST explains how bacterial cells are able to produce insulin for humans (Option B).
Recombinant DNA (rDNA) refers to the genetic engineering strategies used to create genetically modified organisms capable of expressing exogenous DNA sequences.The rDNA technologies involve the use of specific proteins that cut (restriction enzymes) and paste (ligase enzymes) target nucleotide (DNA) sequences in order to design organisms containing such sequences.The recombinant DNA can be expressed into a suitable vector (in this case, bacteria) in order to produce a protein of interest (e.g., insulin).In conclusion, the statement 'bacteria have been genetically engineered to contain the DNA needed to produce insulin'' BEST explains how bacterial cells are able to produce insulin for humans (Option B).
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A biology student was observing a specific type of cell. It had DNA,
ribosomes, and cytoplasm. What type of cell was she probably
observing
Answers
Answer:
she was probably observing a prokaryotic cell.
Explanation:
:)
1
Which of the following can be used to produce electrical energy?
OA. generators
B.
solar cells
C.
batteries
D.
all of these
Answers
They all produce electricity
I WILL GIVE BRAINIEST
Please help with these questions!!
Answers
Describe what happens to the egg during the menstrual cycle on day 14. _______________________
Answers
Answer:Ok so A few days before Day 14, your estrogen levels peak and cause a sharp rise in the level of luteinizing hormone (LH). LH causes the mature follicle to burst and release an egg from the ovary, called ovulation, on Day 14.At about day 14 in the menstrual cycle, a sudden surge in luteinizing hormone causes the ovary to release its egg. The egg begins its five-day travel through a narrow, hollow structure called the fallopian tube to the uterus. hope this helps have a nice night ❤️❤️❤️
Explanation:
Answer: Because However, during days 10 to 14, only one of the developing follicles forms a fully mature egg. At about day 14 in the menstrual cycle, a sudden surge in luteinizing hormone causes the ovary to release its egg. The egg begins its five-day travel through a narrow, hollow structure called the fallopian tube to the uterus. The egg travels down the fallopian tubes. If pregnancy doesn't occur, the egg is reabsorbed into the body. Levels of oestrogen and progesterone fall, and the womb lining comes away and leaves the body as a period (the menstrual flow). The time from the release of an egg to the start of a period is around 10 to 16 days.
Explanation:
HELP!
In the desert, saguaro cacti, owls, horned lizards, and fire ants all share the same space.
Which example can be considered a population?
the lizards and the ants
all plants in the same area
all species in the same area
all saguaro in the same area
Answers
Answer:
I did the test; proof