Why is uranium lead dating better than radiocarbon dating?
Answers
Answer:
Uranium-238 has a much longer half-life of 4.5 billion years versus Carbon-14's 5,730 years.
Explanation:
Radioactive Carbon-14 or [tex]^{14}C[/tex] is typically formed in the upper atmosphere. In plants, it gets incorporated into organic molecules through photosynthesis, and this material is ingested by consumers.
It is used for the process of radiocarbon dating of fossils and formations. Radioactive isotope dating is an effective means of identification due to the unstable nature of the isotope used and the predictable rate of decay.
Over time they decay to give off an electron, in an effort to become a more stable element. For instance, [tex]^{14}C[/tex] has a relatively short half-life and half the in a sample becomes Nitrogen over a few thousand years (5,730 years).
However, for older samples, other isotopes are used because their long half-life may range between a million to billions of years. Uranium-238, with a half-life of 4.5 billion years is often used in geochronology; uranium-lead dating is suitable for older specimens.
Related Questions
What is the function of the chloroplasts?
Answers
which layer hosts most marine wildlife?
please help me :/
Answers
Answer:
Epipelagic Zone
Explanation:
Which type of receptor binds to ligands that cannot enter the cell?
a. surface / membrane
b. intracellular
c. functional
d. cytoplasmic
Answers
Answer:
A membrane
Explanation:
All organisms must have water for survival. If a drought causes the water in an ecosystem to become scares the organisms in this
ecosystem will not have as much water accessible to them
A decrease in the water available to an organism for cellular processes will most likely result in
CA
a decrease in optimal temperature ranges
e.
an increase in activity level
C, a decrease in metabolic activity
an increase in metabolic activity
Answers
Answer:
C, a decrease in metabolic activity
Explanation:
In times of drought, there would be a reduction in the metabolic activity of an organism.
Most organisms found in very dry climates have adaptation to accommodate a period of drought. Water is essential for the metabolic processes in an organism. A deficiency of water will reduce these life activities. The organism can become inactive as a result of this.What type of molecules can diffuse through a membrane?
A small and uncharged
B large and polar
C any molecule
Please help 10 points
Answers
Who knows this it is for today?
Answers
Answer:
Since omni- means all, then we know that omnivores will eat a lot of things
Explanation:
And omnivores do eat both meat and vegetation
Omnivores eat everything
An organism's DNA determines the traits it will haveWhich statement correctly explains how DNA determines the organism's traits?
Answers
Answer:
This question is incomplete as it lacks options, the options are:
1- The sugar and phosphate groups that make up the backbone are used in different sequences to encode an organism’s traits.
2- The bases A, T, C, and G are always present in equal amounts, so each organism is unique.
3- The bases A, T, C, and G in DNA are used in different sequences to encode an organism’s traits.
4- The bases A, T, C, and G are always in the same order in each organism, so each organism is unique.
The answer is 3. The bases A, T, C, and G in DNA are used in different sequences to encode an organism’s traits.
Explanation:
Deoxyribonucleic acid (DNA) is the genetic material in the cells of living organisms. It is a polymer biomolecule made up of nucleotides monomers. The DNA contains information that encodes the synthesis of useful products (proteins), which determines the traits in organisms.
A DNA molecule is made up of four nucleotide subunits viz: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C). These bases, which are used in different sequences, carry the information that encodes an organism's trait.
how many chromosomes do whales have
Answers
Answer:
i have been researching and i found they have 42 chromosomes. Blue whales have 44 and sperm whales have 46 i was getting different numbers for different whales
Explanation:
Hope i helped!
True or False?
Substitutions can lead to frameshift mutations.
True
False
Answers
Answer:
false
Explanation:
because substitution it can't lead
Answer:
True
Explanation:
I did some
research
how the sun is involved with the formation of other forms of energy on Earth.
Answers
There are two species of squirrel in the United Kingdom: red squirrels and gray squirrels. Red squirrels are native to the United Kingdom while gray squirrels were introduced to the United Kingdom from North America in 1876. Figure 1 show the distributions of the two squirrel species in 1945 and 2010.
Answers
Answer:
The grey squirrel has increased their rate of emigration to the UK
The grey squirrel has increased their rate of emigration to the UK.
What is emigration?Emigration is the act of relocating away from a resident country or place of residence (to permanently leave a country). Contrarily, immigration refers to the flow of individuals from one country into another (to permanently move to a country).
A migrant leaves their home nation and moves to their adopted one. Emigration and immigration thus both describe migration, but from the perspectives of various nations.
Demographers look at the push and pull factors that cause people to be drawn to one place and pushed away from another. Desires to escape unfavorable situations, such as scarcity of land or employment opportunities, or unfair treatment, are possible.
Therefore, The grey squirrel has increased their rate of emigration to the UK.
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What are DNA and RNA are made of?
Answers
the location of a blood source viewed in three mis as determined by projecting angleso part of individual bloodstains
Answers
Answer:
the direction of blood droplets can be determined from the shape of that it formed when they hit the flat surface. the tail of the elongated drop points to the travel Direction.this droplet was traveling from bottom left and upper right the victim may be somewhere in the lower left.
Explanation:
what is a large structure that directs the cell’s activities and contains DNA?
Answers
Answer:
That would be the nucleus!
Explanation:
What is the national population rate?
Answers
Answer:
0.6% annual change (2018)
Explanation:
A ball bounces on the ground. How do the ball and the ground act on each other?
Answers
Explanation:
It will continue to fall under the influence of gravitational acceleration, but now, a normal force from the ground surface, opposing the force due to gravity, will act on the ball.This all means that the ball is pushing on the ground with a force greater than its own weight, so acceleration must point upward.
I need help plz. It’s not the bottom left answer
Answers
What is the correct answer?
Answers
Answer:
220 may be the answer of this question
Answer: the first one cause 440 times 2 is 880 so that is the correct answer
Explanation:
What would happen to the concentrations of ATP, NADPH and Sugars if PSII stopped working?
Decrease
Stay the Same
Increase
ATP
NADPH
Sugars
Which of the following is true about the Calvin cycle?
Rubisco fixes O2 to a carbohydrate molecule.
Both ATP and NADPH are needed to make sugars.
Light energy is converted to chemical energy.
Answers
Answer:
1. ATP - decrease
2.NADPH - decrease
3. sugars - decrease
And True- Both ATP and NADPH are needed to make sugars.
Explanation:
Photosynthesis is a form of biosynthesis that produces glucose from the reactants; it uses energy from sunlight, along with carbon dioxide and water. It happens in the chloroplast in two phases; the light-dependent and dark reactions. In the light reaction, solar energy stimulates photosystems, formed from pigments like chlorophylls.
Chlorophyll forms photosystems of proteins known as complex proteins (PS I & PSII). PS II absorbs and moves the reaction center with light energy.
H+, and oxygen, are formed from a water molecule as it's broken apart. From photosystem II, electrons are transferred to photosystem I. ATP is synthesized from ADP along with inorganic phosphate. To form NADPHH, H+ is added to NADPIf PS II no longer works, there will be less ATP, NADPH, (both used later on) and no sugars produced.
In the dark reaction, products of the light reaction are used to make sugars. Here, in the Calvin cycle, the enzyme, RuBisCO, catalyzes the fixation of CO2 with Ribulose 1,5-bisphosphate (RuBP).
6. What biome is the most dry or arid?
O tropical rainforest
O savanna
O desert
O temperate grassland
Answers
Answer:
C) desert
Explanation:
Explain the effect of ingesting an extremely large amount of water at the cellular, including the role of osmosis in this process
Answers
Hi, you've asked an incomplete question. Here's the full question:
In extreme cases, it is possible to die from drinking too much water. The consumption of several liters of water in a short amount of time can lead to brain edema (swelling) and death. Explain the effect of ingesting an extremely large amount of water at the level of the brain cells, including the role of osmosis in this process.
Explanation:
Note, the term Osmosis in biology refers to the movement of solvents such as water through a semipermeable membrane to a higher solute (what is dissolved in the solvent) concentrated region.
For example, when one ingests an extremely large amount of water, the osmosis process begins as the water (which is the solvent) would travel down into the cell membrane and then into the cell (which is the semipermeable membrane in this case), because of the imbalance in the concentration the cell/water level, the cell may dysfunction possibly leading to death.
The effect of ingesting an extremely large amount of water at the cellular, including the role of osmosis in this process - It creates a hypotonic environment for your body due to osmosis.
Osmosisa process in which solvent such as water moves from its higher concentration to its lower concentrationIt must be separated by a semipermeable membrane or differentially permeable membraneit does not require any extra energy, only depends on the concentration gradient.When someone ingests an extremely large amount of water at the cellular, water will diffuse into the cell and the cell will begin to swell which is known as a hypotonic environment.Learn more:
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Plants have an added layer that animal cells do not. What is that added layer called?
Answers
Answer:
a cell wall
Explanation:
Which of the following phrases describe the function of the digestive system?
l. Smooth, muscular tube connects the mouth to the stomach
ll. Muscular action in the esophagus pushed food to the stomach
lll. Structures called the microvilli to increase the surface area of the intestines
lV. Nutrients are made available to the body's cells
A. l and ll
B. ll and lll
C. ll and lV
D. lll and lV
Answers
12Which statement best describes the relationship that exists among proteins, DNA, and
cells?
a. Proteins combine to produce cells, which produce DNA
b. Proteins are made up of DNA, which determines the cells that are produced.
cDNA is made up of proteins, which tell a cell how to function
d. Cells contain DNA, which controls the production of proteins.
Answers
Answer:
C
Explanation:
A DNA is made up of proteins which was synthesized by ribosomes of the cell to produce mRNA and then these mRNA and used to catalyse the DNA production. DNA of a cell in the nucleus is the programmed individuality that controls, manages and organizes the entire cell to function and initiate celluar activities.
Answer:
it c
Explanation:
i took the test
Judy used the following soil triangle to identify a sample of soil as silty clay.
Soil texture triangle. Clay soil is approximately 45 percent or less sand, 50 percent or more clay, and 40 percent or less silt. Silty loam soil is approximately 50 percent or less sand, 30 percent or less clay, and 50 percent or more silt. Sandy clay soil is approximately 45 to 65 percent sand, 35 to 55 percent clay, and 25 percent or less silt. Sandy clay loam soil is approximately 45 to 80 percent sand, 20 to 35 percent clay, and 35 percent or less silt.
Which description of soil likely allowed Judy to make this identification? (2 points)
a
Mostly large particles, with a gritty texture, 75% clay, 15% sand, and 10% silt
b
Mostly large particles, with a sticky texture, 65% clay, 10% sand, and 25% silt
c
Mostly small particles, with a sticky texture, 50% clay and 5% sand, and 45% silt
d
Mostly small particles, with a smooth texture, 30% clay, and 25% sand, 45% silt
Answers
Answer:
its C
Explanation: I worked it our w/ the triangle and this seemed the most logical answer. plus had the same question on a test ~5min before this post so I know for sure its right.
Soil texture or Soil profiling is referred to as the proportion of primarily three different types of particles, clay, sand, and silt.
The description that is similar to Judy's soil triangle is that most small particles, with a smooth texture, are 10% sand, 50% clay, and 40% silt.
The soil profiling can be explained as:
1. Clay is one of the smoothest and fine particles of the soil. It has a diameter of fewer than 0.2 millimeters. Clay soil is 40% or more is clay, less than 40% is silt, and 45% or less is sand.
2. Sand is a coarse particle and is the largest mineral in the soil. The particle is gritty and has a diameter of 0.05 to 0.02 mm.
3. Silt is found in a high percentage of the soil and gives a smooth texture to the soil.
Thus, the correct answer is Option C.
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What are some species that are extinct? W
ecome extinct?
Answers
Answer:
Below
Explanation:
Most dinosaurs
Passenger Pigeon
Saber Toothed Tiger
Dodo
Great auk
Pyrean ibex
Giant Ground Sloth
Aurochs
If an ecosystem is no longer able to sustain its biodiversity, what potential impact could that fact have on the carrying capacity and growth rate of the human population over time?
Answers
I really hope this helped :)
It could potentially lead to a decrease in the carrying capacity of the ecosystem, which could in turn lead to a decrease in the growth rate of the human population over time.
What is carrying capacity?The carrying capacity of an ecosystem is the maximum number of individuals of a particular species that can be supported by the resources of that ecosystem. It is determined by the availability of food, water, and other resources, as well as by the presence of other species and environmental conditions. When the carrying capacity is reached, the population of that species will stabilize and may even begin to decline.
Carrying capacity is an important concept in ecology and population dynamics, as it determines the maximum size that a population can reach in a particular environment. It is important to note that carrying capacity is not fixed and can change over time due to a variety of factors, such as climate change, the introduction of new species, or the depletion of resources.
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Your gender, whether you are male or female is determined by the
Answers
Answer:
Amount of XY or XX chromosomes in the sperm used to fertilize the egg
Explanation:
If you're female the sperm had XX chromosomes
If you're male the sperm had XY chromosomes
Which process is similar to binary fission?
Answers
Answer: mitosis
Explanation: Binary fission is similar to mitosis in the way that the process ultimately leads to the production of two identical daughter cells. However, they differ in many aspects. While binary fission is for reproductive purposes mitosis is primarily for growth in multicellular organisms.
A wave hits an object as shown.
Which kind of wave interaction is shown?
Answers
Answer:
Refraction
Explanation:
The wave interaction shown is called refraction.
Refraction occurs when a wave crosses the boundary between two mediumIn this process the ray becomes bent. The density difference between the two medium accounts for the bending of the rays. When a ray crosses the boundary from a less dense to a denser medium, it is deflected to the normal as the ray slows down.Answer:
refraction
Explanation: