Answers
Answer:
Radioactive sources are used to study living organisms, to diagnose and treat diseases, to sterilize medical instruments and food, to produce energy for heat and electric power, and to monitor various steps in all types of industrial processes. Tracers are a common application of radioisotopes.
Explanation:
Related Questions
Carbon-14, a naturally occurring radioactive isotope of carbon, is found in the remains of organic matter. It has a half-life of 5,730 years, and decays as shown below.
Answers
The radioactive isotope containing carbon with the symbol C-14, often known as radiocarbon, has an atomic nucleus made up of 6 protons with 8 neutrons.
Carbon-14 is radioactive, but what kind?Due to its low energy beta emission, even very high concentrations of carbon-14 do not present a significant risk to those who are exposed. The outer, protective, dead layer of a body's epidermis is only just slightly penetrated by beta radiation.
Is the carbon-14 an isotope that exists naturally?Three isotopes of carbon are found in nature: carbon 13, that has 7 neutrons, carbon 14, that has 8 neutrons, and carbon 12, which now has 6 neutrons (6 protons = 12). There are various isotopes for each element. One little neutron can significantly alter an isotope's characteristics.
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A Potassium-Argon
(K-Ar) age measures which of the following
the time since last cooling below the gas retention temperature - Potassium is the gas
the time since last cooling below the gas retention temperature - Argon is the gas
the time since the tree containing the Potassium died
the time since crystallization of a mineral containing Potassium
Brouiquc
Answers
A Potassium-Argon (K-Ar) age measurement is a dating technique used in geochronology to determine the age of rocks and minerals. It relies on the radioactive decay of potassium-40 (K-40) into argon-40 (Ar-40) over time. The correct answer to the given question is (D) The time since crystallization of a mineral containing Potassium.
When a mineral containing potassium crystallizes, it starts accumulating K-40. Over time, K-40 decays into Ar-40. By measuring the ratio of K-40 to Ar-40 in a mineral sample, scientists can estimate the time elapsed since the mineral's crystallization.
The process of crystallization occurs when molten rock, or magma, cools and solidifies. During this crystallization process, minerals with potassium incorporate the K-40 isotope into their crystal lattice. From that point forward, the K-40 atoms in the mineral begin to decay, producing Ar-40 as a byproduct. By comparing the amounts of K-40 and Ar-40 in a mineral, scientists can calculate the age of the mineral.
It is important to note that the K-Ar dating method is most suitable for dating minerals that have formed from volcanic activity or have been subjected to high temperatures. The technique is commonly used to date rocks and minerals in the range of thousands to billions of years old.
In summary, a Potassium-Argon age measurement determines the time since the crystallization of a mineral containing potassium. It relies on the accumulation of potassium-40 and the subsequent decay into argon-40 in the mineral over time. This dating method provides valuable insights into the age and geological history of rocks and minerals.
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Your friend claims that an energy pyramid may not have the same shape as a pyramid of numbers for the same ecosystem, as shown in the diagrams.
Energy Pyramid
Pyramid of Numbers
Trophic 3
level
2
Trophic 3
level
2
Joules (J)
Number of individuals
Which statement accurately uses the diagrams to support this claim?
• A. A few large producers can support a very large primary consumer population, as shown in the pyramid of numbers.
B. Occasionally, primary consumers are able to carry out photosynthesis, as shown in the pyramid of numbers.
c. A large number of producers can support the same number of primary consumers, as shown in the energy pyramid.
D. Higher trophic levels always contain fewer individuals, as shown in both the energy pyramid and the pyramid of numbers.
Answers
The correct statement that accurately uses the diagrams to support the claim that an energy pyramid may not have the same shape as a pyramid of numbers for the same ecosystem is: Higher trophic levels always contain fewer individuals, as shown in both the energy pyramid and the pyramid of numbers.
The correct answer is option D.
Both the energy pyramid and the pyramid of numbers illustrate the relationship between trophic levels in an ecosystem. The energy pyramid represents the flow of energy through different trophic levels, with each level consuming a portion of the energy from the level below. As energy is transferred, some energy is lost as heat, resulting in a decrease in available energy at higher trophic levels. This reduction in energy availability limits the number of organisms that can be supported at each level, leading to a decrease in the number of individuals as we move up the pyramid.
Similarly, the pyramid of numbers represents the number of individuals at each trophic level in the ecosystem. It typically follows a similar pattern to the energy pyramid, with a larger number of individuals at lower trophic levels and a decreasing number of individuals at higher trophic levels. This is because energy transfer is not 100% efficient, and as energy flows through the food chain, it supports a smaller number of organisms at each successive level.
The statement in option D accurately highlights the consistent pattern observed in both the energy pyramid and the pyramid of numbers, where higher trophic levels contain fewer individuals. This supports the claim that the shape of an energy pyramid may not necessarily match the shape of a pyramid of numbers, as the number of individuals in each trophic level is influenced by factors other than energy availability, such as predator-prey interactions and reproductive rates.
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C6H12O6 + 6O2 --> 6H2O + 6H2O
How many total atoms of oxygen are on the reactants side?
SELECT AN ANSWER
6
12
18
2
Answers
Answer:
18
Explanation:
6 in C6H12O6 and 12 (6×2) from O2
Therefore, 12 + 6 = 18
Please answer this I have to get done fast ! ……………………………………….
Answers
Answer:
c) The caterpillar is a herbivore
Explanation:
The caterpillar eats the flower, the frog eats the caterpillar, the snake eats the frog and the owl eats the snake. The is a food chain. If you take one animal out it would affect them all.
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YOU HAVE 5 MINUTES!!!!
Design an easy do-it-yourself compost bin that can be put (exnfe ffpao)
together at home. You can describe it, draw and label it, or both!
Include the following in your design:
• drawing or description of design
• materials used for the bin
• size of the bin
• substances used to fill it
• household items that can go in it
• how long it takes before it is ready
• how you use the compost
2)
Compost bin design: Add these household items to
your compost bin:
Compost is ready to use in this
much time:
Use your compost this way:
Answers
A description of the compost bin that can be used for this experiment is that the bin is a rectangle-shaped container that is made of wood. This container is 150 cm wide and 30 cm deep. It can hold up decaying materials for up to one month.
How to use the compostThe compost can be used to store decaying materials that will be used in a nearby farm for manure. Composting is the act of storing up decomposable materials that remain in a container until they are ready for use.
The compost so obtained can be used to improve the fertility of the soil where crops will be planted.
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What is the relationship between a molecule of DNA and a chromosome?
Answers
Answer: In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure
Explanation:
What specific type of transport is represented in the diagram above?
1. Facilitated diffusion
2.active transport
3.osmosis
4. Endocytosis
Answers
Answer:
facilitated diffusion
TIMED PLEASE HELP! INTRO TO PSYCHOLOGY
Describe at least 4 environmentally influenced
learned behaviors using your
own life experience.
Answers
Using my personal life experience, I can identify four learned habits that are influenced by the environment: parasites, noise, light, sound, and food pollution.
What does the study of the environment do?Environmental scientists employ the natural sciences they have learned to save the environment. Natural science expertise is used by environmental specialists to safeguard both the environment and public health. In order to reduce waste, they might collaborate with industry, advise legislators, or clean up contaminated places.
What is meant by ecology?The study on organisms and how they interact with their environment is called ecology.. The interaction between living organisms and their environments is studied by ecologists.
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A mother and father are curious about the possibility of having children of certain blood types. After some testing, the doctor tells them there is no chance that either of them will ever have a child with type O blood, no matter their partner. He does assure them that all of their children will have the same blood type. On the other hand, none of the children will have the same blood type as either the mother or the father. What blood type will the children be?
Answers
The blood type that the children won't have O blood type because the doctor says so and the children will not have the same blood type. This means that the children's blood type will likely be type A or Type B.
why is the diversity of living things in salt water greater than in fresh water? give as many reasons you can think of. will give brainliest
Answers
Answer:
For one thing, there's lots more of it. There are many more environmental niches to be occupied in salt-water bodies, and importantly, they're all connected, making it easier for species to migrate and adapt to new habitats. Conversely, fresh-water habitats are often more isolated, confining species to a single habitat and decreasing the likelihood that they'll be able to migrate and adapt.
Explanation:
1. Identify the method of climate study that can tell how much rain an area had over the last 200 years.
microscopic organism data
sediment core data
O
tree ring data
ice core data
Answers
Answer:
It soubds like all the above except microbiological organisms.
Answer: The correct answer is Tree Ring Data (Option C)
Explanation:
A tree-ring record can be used to produce information about rainfall, temperature, the presence of groundwater, and fires around where the tree is growing.
What term is used to describe the number of chromosomes in a gamete, such as
an egg cell or a sperm cell?
Answers
Answer:
The biology term, haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes
The term used to describe the number of chromosomes in a gamete would be haploid.
Gametes are usually formed by meiosis and meiosis is referred to as reductional division. When a normal diploid (2n) cell divides by meiosis, the daughter cells would have half the number of chromosomes of the parent cell. In other words, the daughter cells will have n number of chromosomes as opposed to 2n.
Cells with n chromosome numbers are generally referred to as haploid while those with normal 2n chromosome numbers are said to be diploid. Egg and sperm cells are haploid cells.
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What two things do producer bacteria and plants have in common ??
Answers
Answer:
Like plants, producer bacteria use the energy from sunlight to make food. These bacteria are often green.
The common thing which has been shared by both bacteria as well as plants that they both prepare their food in the presence of sunlight and the process is known as photosynthesis.
What is photosynthesis?Photosynthesis is the process in which green plants prepare their own food in the presence of sunlight and the heat energy is converted into chemical energy during the process of photosynthesis. Due to presence of chlorophyll The color of plants are green.
Leaf has been known as the basic site for the process of photosynthesis it means that the process of photosynthesis occurs in leaf. The main function of leaf has to produce the food material for plants which will help plants to get nourished.
Green plants contain chlorophyll and they prepare there own food in the presence of sunlight and the process is known as photosynthesis. In the process of photosynthesis light energy converted into chemical energy.
Therefore, the common thing which has been shared by both bacteria as well as plants that they both prepare their food in the presence of sunlight and the process is known as photosynthesis.
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which of the following statements st describes scientific research
Answers
Your answer → research typically uses a variety of sources.
Which of the following influences the amount of ozone pollution near Earth's surface?
O An area's weather patterns
O Nearby water resources
O Volcanic eruptions
O Plants undergoing photosynthesis
Answers
All the four options can lead to ozone pollution near the earth's surface.
Ozone Pollution- Increased wheezing, coughing, and chest tightness are brought on by ozone pollution, which results from hydrocarbon and nitrogen oxide emissions from cars and other sources mixed with sunshine.
Plants undergoing photosynthesis- Significant producer of VOCs (Volatile Organic Compounds) is woody vegetation. Before they react to generate ozone in the atmosphere, where it can linger for several weeks, NOx and VOCs can be transported over great distances by local weather patterns.Volcanic eruptions- Volcanoes probably generate enough bromine to deplete the ozone layer locally and alter the chemistry of the stratosphere. According to estimates, 1 to 5 percent of ozone damage is thought to be caused by volcanoes, 15 to 20 percent by other natural sources, and a staggering 75 to 85 percent by human activity.Water resources- From farms, factories, and towns, streams and rivers transport pollutants like chemicals, fertilizers, and heavy metals into our bays and estuaries, where they are then transported out to sea. The wind also brings in marine waste, particularly plastic, as does water from storm drains and sewage systems.Weather Patterns- As a result of global warming, there will be an increase in more extreme weather, including heat waves, extreme rainfall events, and other phenomena. Because the chemical reactions that produce ozone in the atmosphere take place more often in hot temperatures, heat waves increase the amount of ground-level ozone pollution.To learn more about ozone pollution- https://brainly.com/question/14154063
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Answer:
An area's weather patterns
Explanation:
the teacher told me
The ages of four different horse fossils are shown in the table below. Use the information to
answer question.
If all of the fossils in the table above were located in different layers of rock, dating the
fossils by relative dating would place the fossil Mesohippus in which layer relative to the other
fossils?
Answers
Answer:
I think is second layer from the top
Explanation:
Write a question to match this answer:
6 boxes of 12
Answers
Answer:
The chocolate lover bought 6 boxes of chocolate, each containing 12 truffles
Explanation:
mark me brainly
Answer:
The chocolate lover bought 6 boxes of chocolate, each containing 12 truffles. How many truffles did she buy?
what was the first life form on earth based on the diagram above
Answers
Answer:
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.
Explanation:
7. For the following scenario provide a hypothesis, the dependent variable, independent variable, standardized variables, and control group.
Scenario: You want to determine whether plants communicate with their neighbors in response to stress, so you design an experiment. You have two groups of plants, one that will be exposed to a stressor and another that will not. You apply the stress 3 times a day for 10 days. At day 1 you measure the amount of stress hormone in the plants and then again you measure the amount of stress hormone on day 10.
Answers
Here, the hypothesis is "plants communicate with their neighbors in response to stress", dependent variable is the amount of the stress hormone in the plants, and the independent variable is the exposure to stress (applied 3 times a day for 10 days), standardized variables are plants used, duration of the stressor, amount of stress hormone. The control group is the plant that is not exposed to stressor.
What is the significance of the control group?Here, the control group is the group of plants that are not exposed to stress, and the control groups plants are experimented or tested with the other plants to get the result of the stress hormone on the plants.
Hence, here, the hypothesis is "plants communicate with their neighbors in response to stress", dependent variable is the amount of the stress hormone in the plants, and the independent variable is the exposure to stress (applied 3 times a day for 10 days), standardized variables are plants used, duration of the stressor, amount of stress hormone. The control group is the plant that is not exposed to stressor.
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24. An investigator examines voltages resulting from changes in membrane permeabilities. If the cell membrane suddenly had 100 potassium channels per square micron open and the number of leak channels were about 1 per square micron, they would drive the cell to what voltage value
Answers
Answer:
Generally, K+ ions ensures re-polarization of the membrane potential. It always ensures that the neuron returns its resting state, protecting the neurons and ensuring episode of rest before the next action potential.
K+ does this by leaving the axon, making the inner layer more negative. This is resting membrane potential. Because there are many K+ channels for leakages out of the neuronal axons.
Therefore, in this scenario, he neuron will return to its resting membrane potential state which between values -50 to -75mV.
Therefore the value of the potential will be -60mV, or within the range of -50 to -60mV. This is because the neuron is is non- excitable.
Explanation:
Which domain Includes organisms that have
a nucleus, a cell membrane, and mitochondria?
Answers
A variety of plant populations can be found in a prairie. What would be the most likely effect on a plant populations if there was a significant decrease in rainfall? A- Competition for water among the plants would decrease B-Competition for water among the plants would increase C- it would increase the ability all the plants reproduce D-it would have no effect on the plant populations.
Answers
The most likely effect on plant populations in a prairie if there was a significant decrease in rainfall would be an increase in competition for water among the plants. So, the correct answer would be B - Competition for water among the plants would increase.
What is a plant population?Plants are dependent on water for a variety of processes, including photosynthesis, growth, and reproduction. In a prairie ecosystem, different plant species coexist and comete for limited resources such as water, nutrients, and sunlight. A decrease in rainfall would lead to a reduction in the available water supply, which would result in increased competition for water among the plants. As water becomes scarcer, plants will need to adapt to survive. Some plants may be better able to tolerate dry conditions or have deeper roots that can access water from deeper in the soil.
Hence, So, the correct answer would be B - Competition for water among the plants would increase.
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membrane refers to-
a. cells of different sizes.
b. organisms that consist of only one cell.
c. a thin, soft, pliable sheet or layer.
d. large, efficient cells.
please help
Answers
Answer:
c
Explanation:
the membrane is the outside layer of the cell
what word in a question do you look for to identify independent events in sequence
Answers
Answer:
A&BBB
Explanation:
1. What adaptation does the organism have that makes it well suited for its
environment?
Answers
The diagram below shows a body cell with 4 homologous pairs of chromososmes. During sexual reproduction, how many chromosomes will this organism transmit to its offspring? A. 4, two pairs of homologous chromososmes. B. 2, one pair of homologous chrmomsomes. C. 4, one chromosomes from each homologous pair. D. 8, all of the chromosomes shown.
Answers
During meiosis, chromosomes from homologous pairs separate and each of them is part of a new haploid cell -the gamete-. Option C. 4, one chromosomes from each homologous pair.
What is meiosis?Meiosis, together with mitosis, is one of the cell division processes.
Meiosis occurs only in germ cells and is in charge of gametes production. One germ diploid cell (2n) produces four haploid cells (n). These haploid cells are gametes.
Meiosis is preceded by an interphase in which the all the cell content duplicates, including DNA. Once the cell content is duplicated, meiosis occurs. There are two meiotic phases.
The reductive phase, in which homologous chromosomes separate. The resulting daughter cells get only half the number of chromosomes that the parental cell has.
In the second phase, the cell suffers a new, not reductive division.
Each gamete receives only one chromosome from the homologous pair. And during fertilization, each parent provides only one gamete, hence, one chromosome from each homologous pair.
According to this information, the correct option is C. 4, one chromosome from each homologous pair.
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Which of the following most likely happens when the temperature of a chemical reaction is increased?
O Molecules speed up
O Molecules stop reacting
O Reaction rate decreases
O Chemical reaction stops
Answers
Answer:
2
Explanation:
Given the DNA strand: TAC GGG CTA CAC ACT
Transcribe the corresponding mRNA strand: _______________________________
Translate into the corresponding amino acids: _______________________________
Answers
Answer:
mRNA strand: AUG CCC GAU GUG UGA
amino acids: methionine-proline-aspartic acid-valine-stop
Explanation:
mRNA rules:
- A pairs with U
- G pairs with C
- T pairs with A
next, use a codon chart to figure out the amino acids
UGA is a stop codon and therefore does not translate into an amino acid.
Imagine someone asks you how much you spend per year on clothing. To give an answer, you figure you spend about $50 per month, and you calculate that to about $600 per year. What approach to problem solving did you use to provide an answer to the question?
Question 1 options:
Algorithm
Analogy
Prototype
Heuristics
Answers
The correct approach to problem solving in this question is option (1) i.e, Algorithm.
What is Algorithm?Algorithm is a common set of rules or step-wise instructions used in calculation or computation as an approach to problem solving.
Algorithm originally refers to a systematic procedure that produces—in a finite number of steps—the answer to a question or the solution of a problem.
The term is derived from the Latin translation, Algoritmi de numero Indorum, of the 9th-century Muslim mathematician al-Khwarizmi’s arithmetic treatise “Al-Khwarizmi Concerning the Hindu Art of Reckoning.
Whereas, Analogy refers to comparison between one thing and another, typically employed as an approach to explanation or clarification and Prototype is preliminary sample, device or model based upon which other (higher) forms or versions are developed.
Heuristics are the mental shortcut commonly used an approach to solve or simplify problems and avoid cognitive overload based upon the information from previous experiences with similar problems.
Here, the annual expenditure on clothing can be estimated based upon the monthly clothing expenditure. If $50 per month is spent on clothing, then $600 will be spent per year according to the simple rule of multiplication, i.e, 50*12+600. Thus, an algorithm is best approach to problem solving or decision-making.
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