The basic concept behind relative age dating of fossils is that the Lower Rock layers were deposited earlier than the Upper Rock layers. This is because the principle of superposition states that in an undisturbed sequence of sedimentary rocks, the oldest rocks are at the bottom, and the youngest rocks are at the top. As a result, fossils found in the lower layers are generally older than those found in the upper layers. This method of dating does not rely on measuring radioactive isotopes or other methods that require absolute dates, but rather on the relative position of the fossils within the layers of rock.
Which of the following explains why artificial selection is described as artificial?
It is the opposite of natural selection, in which organisms adapt to their environments without human intervention.
It alludes to the process of artificial insemination, a process of unnaturally planting a fertilized egg.
It deals with synthetic or superficial genes and traits like color, markings, size, and speed.
It is the label used to show which animals have been given hormones and artificially-made nutrients.
Answer:Likely option 1
Explanation:Natural selection is selects for individuals with traits of increased relative fitness (fitness= ability to produce viable offspring) Artificial selection is when people select for a desired trait.
None of the choices above are great...
first option: likely the best choice by process of elimination
second option: Artificial selection doesnt necessarily have to involve artificial insemination, though it can
3rd option: traits like color, markings, size and speed are not generally superficial... traits of color, markings and physical fitness (size/speed) often increase fitness in regards to sexual selection
The final option is simply false
genetic inheritance life siences grade 12
The physician has ordered a “crit”. What is your process for drawing the blood sample?
Answer:
Explanation:
The term "crit" typically refers to a hematocrit test, which measures the percentage of red blood cells in a sample of blood. Here are the general steps for drawing a blood sample for a hematocrit test:
Gather supplies: You will need a needle, a syringe, a tourniquet, alcohol swabs, and a collection tube with a purple top (which contains an anticoagulant).
Verify patient information: Check the patient's identification and ensure that you have the correct patient information, such as name, date of birth, and medical record number.
Prepare the patient: Explain the procedure to the patient and ask for their consent. Position the patient's arm comfortably and apply a tourniquet above the area where you plan to insert the needle.
Clean the site: Clean the site with an alcohol swab and allow it to air dry.
Insert the needle: Hold the needle at a 15 to 30-degree angle and insert it into the vein. Once you see blood in the syringe, pull back the plunger to draw the appropriate amount of blood (usually 1-2 mL).
Remove the needle: Release the tourniquet and remove the needle from the patient's arm. Apply pressure to the site with a cotton ball or gauze until the bleeding stops.
Collect the sample: Transfer the blood from the syringe to the purple-top collection tube and mix it by gently inverting the tube several times.
Label the sample: Label the collection tube with the patient's information, the date and time of collection, and your initials.
Transport the sample: Place the collection tube in a biohazard bag and transport it to the laboratory for analysis.
It is important to follow proper infection control practices throughout the procedure, such as wearing gloves and properly disposing of sharps and contaminated materials.
PLS MARK ME BRAINLIEST
Using a light microscope, you observe a cell that has no nucleus. What features would you look for to
determine whether it is a eukaryotic cell undergoing mitosis or a prokaryotic cell?
Put in your own words please.
As eukaryotic cells always have a nucleus, if the cell being observed lacks a nucleus, it is most likely a prokaryotic cell. However, there are a few features to look for to confirm this observation:
1. Prokaryotic cells are smaller in size than eukaryotic cells, so if a cell is particularly small, it is more likely to belong to this phylum.
2. Prokaryotic cells can be rod-shaped (such as bacilli), spherical (such as cocci), or spiral-shaped (such as spirilla).
3. Peptidoglycan forms the cell wall of many prokaryotic cells, which can be visualized by special staining methods.
4. Mitosis is a process that only eukaryotic cells can undergo, as prokaryotic cells are unable to undergo it.
Learn more about Prokaryotic cells, here:
https://brainly.com/question/18348786
#SPJ1
How is artificial selection a trial and error process? (Think about desired traits and how punnet squares work)
Answer:
Explanation:
Artificial selection is a trial and error process because it involves selecting and breeding organisms with desired traits in order to create a new generation of offspring with those same traits. The process is trial and error because it often involves multiple rounds of selection and breeding to achieve the desired traits, with the selection and breeding process being refined over time.
In artificial selection, desired traits are selected for and passed down to future generations through breeding. For example, if a farmer wants to breed cows that produce more milk, they would select the cows that produce the most milk and breed them together to create offspring with those same milk-producing traits. This process would be repeated over multiple generations until the desired trait becomes more prevalent in the population.
Punnett squares are used to predict the probability of offspring inheriting certain traits based on the traits of their parents. Punnett squares are a tool used in genetics to determine the possible combinations of alleles that can result from a cross between two organisms. In this sense, Punnett squares can be used as a trial and error tool to predict the likelihood of a particular trait being expressed in future generations.
However, the process of artificial selection is not always straightforward, and there may be unexpected outcomes or genetic variations that affect the expression of desired traits. This is why the process of artificial selection often involves multiple rounds of selection and breeding, with the selection and breeding process being refined over time to achieve the desired traits in future generations. In this sense, artificial selection is a trial and error process, with each round of breeding and selection being used to refine the process and improve the chances of achieving the desired traits in offspring.
PLS MARK ME BRAINLIEST
Artificial selection involves selectively breeding organisms with desired traits, which is a trial and error process as different combinations are tested and evaluated using tools like Punnett square.
What is artificial selection?Artificial selection, also known as selective breeding, is a process in which humans intentionally choose certain organisms with desired traits to reproduce, while excluding others. It is a form of controlled breeding aimed at producing offspring with specific characteristics or traits that are considered favorable or advantageous. Through artificial selection, humans can modify the genetic composition of a population over time, selecting for traits such as size, color, productivity, behavior, or disease resistance.
Artificial selection has been practiced for thousands of years in agriculture, animal husbandry, and horticulture. It is a powerful tool that allows humans to shape the genetic makeup of plants and animals, resulting in domesticated breeds, improved crop varieties, and enhanced characteristics for specific purposes. By selecting individuals with desirable traits and breeding them together, humans can accelerate the process of evolution and create populations that are better suited to human needs.
Learn more about artificial selection, here;
https://brainly.com/question/21618199
#SPJ2
If samples of nerve cells and bone cells from the same person were run through the same type of microarray, would the results differ? Explain.
pls help (earth science)
The sedimentary bedrock in both regions originally formed as (1) horizontal layers
It should be noted that layer A is the oldest and layer D is the youngest.
The recently formed rock is siltstone.
How to explain the rocksThe principle of superposition can be utilized to determine the sequential ages of layers. According to this concept, in any succession of unaltered sedimentary rock strata, the oldest layer is situated at the bottom, while the youngest layer rests at the apex.
From investigation of the representation, layer A can be observed to lie at the bottom and layer D positioned at its peak; with layers B and C crammed between. Reciprocally, layer A can be concluded as being the eldest, whilst layer D being the most modernizing. The response, thusly, must be option (1) A.
Learn more about rock on
https://brainly.com/question/26046551
#SPJ1
8.
gases in the atmosphere,
including
maintain surface air temperature.
anola. Condensed, nitrogen
b. Greenhouse, water vapor
trap radiated heat and help
c. Flammable, carbon dioxide
d. Inert, oxygen
Answer:
Explanation:b cause its a non verbal. answer for the asset.
Compare and contrast the function of organs and other physical structures of plants and animals.
PARAGRAPH EXPLANATION PLEASE
Animals and plants have completely distinct body structures and metabolic processes.
Animals have a layer of skin, while plants have a waxy outer covering. Water and nutrients are moved throughout the structures of plants. Animals transmit blood containing oxygen, nutrients, and waste products through arteries, veins, and capillaries. Animals have five senses: eyes, ears, noses, and tongues.
Photosynthesis and reproduction are just two of the many tasks performed by this system. The organ systems of plants collaborate to form the structure and functionality of the entire organism, just like those of animals.
Animals have a large number of distinctive and specialised organs, whereas plants only have leaves, stems, and roots as organs.
To know about plant
https://brainly.com/question/11464988
#SPJ1
Part b course activity adaptations in a change environment
Please provide more details about the assignment so that a helpful answer can be provided.
When answering questions on the Brainly platform, it is important to always be factually accurate, professional, and friendly.
Additionally, it is important to be concise and provide only the necessary details to answer the question
. Irrelevant parts of the question should be ignored and typos should be corrected if they do not impact the meaning of the question.
To answer the specific question about Part B of a course activity related to adaptations in a changing environment, more information about the activity is needed.
To learn more about : assignment
https://brainly.com/question/29084454
#SPJ11
Why don’t plants need excretory organs
Answer:
Plants absorb essential nutrients from the soil, hence they lack excretory organs. Particulate matter is not taken as these lack mouths.
Explanation:
Organisms like animals have an advanced and specialized system for excretion. But plants lack a well-developed excretory system like that in animals. They do not have special organs for excretion. Thus, excretion in plants is not so complex.
Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles in a population. One source of variation is mutation. Consider the choices below. Which of the following would NOT be a source of increased genetic variation in a population?
a. immigration into the gene pool
b. random mating between organisms
c. crossing over during meiosis
d. geographic isolation
Answer:
D
Explanation:
Isolation would not cause any genetic variation. When the population doesn't have interactions with other populations, there is a lower chance of mutation occuring.
The process of bulk flow transports fluids in a plant. Describe the two main bulk flow processes
Answer:
Two main types of bulk-flow transports are; transpiration and translocation
Explanation:
In general, translocation is a bidirectional transportation process whereas transpiration is a unidirectional mechanism.
Describe the roles played by stomata and guard cells. What would happen to a plant if these cells did not function correctly?
Answer:
Stomata allow gases to enter and exit the plant. Guard cells regulate the opening and closing of stomata. If these cells did not function correctly, a plant could not get the carbon dioxide needed for photosynthesis, nor could it release the oxygen produced by photosynthesis.
Explanation:
Math help me please it will help me
Which cognitive expert's theory does the scenario describe? Ashlyn has a dog in her house, but she has never seen a cat. When she visits a friend who has a cat, she notices the animal's fur and four legs and thinks it is a dog. Once learning the animal is a cat, she notes the differences and tells her parents about the new animal she met.
Responses
Lev Vygotsky's cultural-history psychology framework
Lev Vygotsky's cultural-history psychology framework
Jean Piaget's schemata theory
Jean Piaget's schemata theory
Erik Erikson's psychosocial stages
Erik Erikson's psychosocial stages
Lev Vygotsky's pivots theory
Lev Vygotsky's pivots theory
The cognitive expert theory that describes Ashlyn's scenario is the Jean Piaget's schemata theory.
What is the Jean Piaget's schemata theory?
The schema referred to by Jean Piaget is a type of cognitive organization that implies an assimilation as in Ashlyn's example in which since she had a dog with fur and four legs, the other animal, having fur and four legs, would also be a dog but It's not like that, it's a cat.
This type of assimilation is a type of simplified image of a certain scheme which is assimilated without seeing more details than certain simple. The scheme then represents the repetition of an action or image.
Therefore, we can confirm that the correct answer is Jean Piaget's schemata theory, option B.
To learn more about Jean Piaget's schemata theory visit: https://brainly.com/question/30750228
#SPJ1
Answer:
B. Jean Piaget's schemata theory
Explanation:
Jean Piaget believes that people use schemata to organize and interpret information as they have different experiences throughout life. Children incorporate or form new schemata as they have new experiences to correlate them with, such as seeing a cat for the first time.
HELP ME PLEASE!!! *100 points and brainliest for best answer*
Fill in the punnet square:
T
------------
| Tt |
t | Tt tt |
------------
In the completed Punnett square, what percentage of the offspring are homozygous recessive?
Answer:
, 25% of the offspring are homozygous recessive for trait T.
Explanation:
To find the percentage of the offspring that are homozygous recessive, you need to count how many boxes have the genotype tt and divide by the total number of boxes. In this case, there is only one box with tt out of four boxes, so the percentage is 1/4 or 25%. Therefore, 25% of the offspring are homozygous recessive for trait T.
As you know bone marrow makes red blood cells, white blood cells and platelets and as you grow it begins to store fat. What do you think a bone marrow transplant will allow the recipient to do?
short explanation thx
Answer:
A bone marrow transplant allows the recipient to receive healthy bone marrow from a donor. This can be life-saving for people with certain types of cancer, genetic disorders, or other conditions that affect the bone marrow's ability to produce blood cells. The transplanted bone marrow can restore the recipient's ability to produce healthy blood cells and improve their overall health and quality of life.
recall the original source of energy for all ecosystems of organism on earth
Answer:
3.1 The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.
Explanation:
have a nice day.
Helpppppppppppppppppppppppp
what was the question before this, it is asking you to support your claim, what was your claim?
Scenario the island kingdom viti levu had a rat problem. How would you describe changes in the rat population over time by reffering to the actions of slow changing and fast changing variables
In the case of the rat problem on the island kingdom of Viti Levu, we can describe changes in the rat population over time by referring to the actions of slow-changing and fast-changing variables.
What is the rat problem?Long-term and rather slowly fluctuating variables have an impact on the rat population. Examples of slow-changing variables in this environment include the temperature of the island, the appearance of new predator species, or changes in land use that affect the amount of food and shelter available to the rats.
Although these slow-changing elements might not have an immediate impact on the rat population, they could have a significant one in the long run.
Learn more about island:https://brainly.com/question/23621976
#SPJ1
From which direction would weather come to a city at 65-degrees north?
Weather in the northern hemisphere comes in the west to east direction.
The weather is affected mainly by the type of wind and the energy radiated by the earth in that region.
The rotation of the earth and Coriolis force affect the direction of a wind, making it flow in the counterclockwise direction.
Thus, the wind flows from the subtropic belt to the sub-polar belt, in the west to east direction. Such winds are known as the westerlies.
Energy that is absorbed by the earth's surface is radiated back into the atmosphere. Due to the rotation and revolution of the earth, there is a variation in the energy absorbed and given back. This also contributes to the weather of an area.
Learn more about weather in:
https://brainly.com/question/9813049
#SPJ1
Will give brainliest. I need help with this project please!
For this activity, you will design and describe a new outer planet. You must answer a series of questions and describe your planet in detail. Once all questions have been answered, you will create a scientific journal entry from the point of view of another astronomer discovering your planet. This journal entry must include all of the answers to the questions, but should be written as if these details are being discovered for the first time.
1. How many AU is your planet from the Sun?
2. Does your planet have a solid surface or is it a gas giant? If it has a solid surface, give the details.
3. Describe the atmosphere.
4. Describe the color(s).
5. Does your planet have rings? If so, are they massive like Saturn’s or almost unnoticeable like Jupiter’s?
6. Does your planet have any moon? If so, how many?
7. How many degrees does your planet tilt?
8. What is the diameter of your planet (in miles)?
9. How long is one full rotation of your planet? (in minutes, hours, Earth days, or Earth years)?
10. How long does it take for your planet to complete an orbit around the Sun (in Earth years)?
Step 2: Write a Scientific Journal Entry
Now it’s time to “discover” your planet! Use your answers to the questions in Step 1 to help you describe the planet in detail. They do not have to be described in the same order as the questions were listed; they can be mixed up to reflect how an astronomer might slowly learn about a planet’s components and aspects. As this journal entry is written from the point of view of the “discoverer” of the planet, you must include the name of the planet and explain why you chose that name. Your journal entry must be at least two paragraphs long.
Your answers to the 10 questions (step 1)
Your journal entry describing your “discovery” (step 2)
You must include the name of your planet and explain why you chose that name
Your journal entry must be at least two paragraphs long
Answer:
1. My planet is located 15.6 AU from the Sun, making it one of the farthest planets in our solar system.
2. My planet is a gas giant, similar to Jupiter and Saturn. It has no solid surface, but rather a thick atmosphere that extends for thousands of kilometers.
3. The atmosphere of my planet is composed mostly of hydrogen and helium, with small amounts of methane, ammonia, and water vapor. The upper atmosphere is extremely cold, reaching temperatures as low as -200°C, while the lower atmosphere is warmer due to the pressure of the gases.
4. The color of my planet is a deep blue, similar to that of Neptune. This is due to the absorption of red light by methane in the atmosphere.
5. Yes, my planet has rings, but they are much smaller and fainter than Saturn's rings. They are made up of ice and dust particles and are only visible through powerful telescopes.
6. My planet has 27 moons, ranging in size from small irregularly shaped rocks to large, spherical objects like our Moon. The largest moon is named after the planet itself, and is called "Xolotl".
7. My planet has a tilt of 32 degrees, causing it to experience seasons similar to Earth.
8. The diameter of my planet is 90,000 miles, making it slightly larger than Jupiter.
9. One full rotation of my planet takes 10 hours and 45 minutes.
10. It takes my planet 165 Earth years to complete one orbit around the Sun.
Journal Entry:
Today, I am excited to announce the discovery of a new planet in our solar system, which I have named "Tlaloc". Tlaloc is a gas giant located 15.6 AU from the Sun, making it one of the farthest planets in our system. Its atmosphere is composed mostly of hydrogen and helium, with small amounts of methane, ammonia, and water vapor. The upper atmosphere is extremely cold, reaching temperatures as low as -200°C, while the lower atmosphere is warmer due to the pressure of the gases. One of the most striking features of Tlaloc is its deep blue color, caused by the absorption of red light by methane in the atmosphere. It also has a system of faint rings made up of ice and dust particles, and a total of 27 moons, the largest of which is named "Xolotl". With a diameter of 90,000 miles, Tlaloc is slightly larger than Jupiter and has a tilt of 32 degrees, causing it to experience seasons similar to Earth. It takes Tlaloc 165 Earth years to complete one orbit around the Sun, and one full rotation takes 10 hours and 45 minutes. I chose to name this planet Tlaloc after the Aztec god of rain and water, as I felt that the blue color of the planet and the presence of water vapor in its atmosphere were fitting of this name. Tlaloc is a fascinating planet that will undoubtedly provide a wealth of information for future studies, and I am excited to see what new discoveries will come from its exploration.
why did the fox population take a year to decrease if the hares are their prey and decreased?
Answer:
Prey leads predators
Explanation:
if the prey goes up predators goes up
if the prey goes down predators go down this is because with a small amount of prey the predators have less to eat and die off but of there is a lot then exponential growth happens with the predators until the prey goes down creating a loop
HELP ME PLEASE I NEED THIS Write in complete sentences to explain what a budget is, how to make one, and how to balance it
(No passage)
Answer: A budget is a financial plan that outlines expected income and expenses for a specific period of time. To make a budget, you need to list all sources of income and all expenses, including fixed expenses such as rent or mortgage payments and variable expenses such as groceries and entertainment. Once you have listed all income and expenses, you can calculate the difference between the two to determine if you have a surplus or deficit.
To balance a budget, you need to ensure that your expenses do not exceed your income. If you have a surplus, you can allocate the extra money towards savings or paying off debt. If you have a deficit, you will need to find ways to reduce your expenses or increase your income to balance your budget. This can be done by cutting back on discretionary spending, finding ways to save on necessary expenses, or finding additional sources of income.
Explanation:
Are the following statements a form of Active or Passive Transport?
Gas moves from one corner of a room to be evenly distributed across the whole room
Chlorine Ions are moved from an area of low concentration to high concentration
No ATP is used for transport
Passive Transport
Energy is used
Water moves from an area of low concentration to high concentration
Carrier proteins allow large molecules to move down their concentration gradient
Glucose is allowed to come into the cell with sodium after the cell has used energy to push sodium outside
Gas moves from one corner of a room to be evenly distributed across the whole room - Passive Transport
Chlorine Ions are moved from an area of low concentration to high concentration - Active Transport
No ATP is used for transport - Passive Transport
Water moves from an area of low concentration to high concentration - Passive Transport
Carrier proteins allow large molecules to move down their concentration gradient - Passive Transport
Glucose is allowed to come into the cell with sodium after the cell has used energy to push sodium outside - Secondary Active Transport (also known as Coupled Transport)
Learn more about active transport, here:
https://brainly.com/question/29759743
#SPJ1
Based on the cell theory, which of the following is true?
Large organisms have fewer cells than small organisms.
Small organisms have smaller cells than large organisms.
All living things are made of more than one cell.
New cells are produced from old cells
Answer:
New cells are produced from old cells
Explanation:
According to cell theory, which is a scientific theory first formulated in the mid-nineteenth century, organisms are made up of cells, they are the basic structural/organizational unit of all organisms, and all cells come from pre-existing cells¹. So, out of the options you provided, the statement that is true according to cell theory is: "New cells are produced from old cells."
Source: Conversation with Bing, 4/27/2023
(1) Cell theory - Wikipedia. https://en.wikipedia.org/wiki/Cell_theory.
(2) Cell theory | Definition, History, Importance, Scientists, First .... https://www.britannica.com/science/cell-theory.
(3) Cell Theory - National Geographic Society. https://www.nationalgeographic.org/encyclopedia/cell-theory/.
A population of lizards with two common phenotypes for color is introduced into an environment. One phenotype is brown and the other is green. Throughout the year, the environment has a combination of green grassy areas and areas of brown soil without plants. Hawks and coyotes hunt the lizards for food. If the environment remains stable, what is likely to happen and why?
A. The green phenotype is likely to become more common because green lizards will have less competition for resources.
B. The brown phenotype is likely to become more common because brown lizards will be less likely to survive predation.
C. Both phenotypes are likely to remain common because they will be equally likely to survive and reproduce.
D. Both phenotypes are likely to become less common because they blend in with and can hide in their environment.
Answer:
Explanation:
I think the answer must be D
Which of the following results in excess nitrogen in the oceans?
The results of excess nitrogen in the oceans is industrialization and increased use of fertilizers, the correct answer is (b).
This is because fertilizers used in agricultural and industrial practices are high in nitrogen compounds, which can runoff into nearby water bodies and eventually make their way into the ocean.
This excess nitrogen can cause a process called eutrophication, in which an excess of nutrients in the water leads to an overgrowth of algae and other aquatic plants. When these plants die, bacteria consume them and consume a lot of oxygen in the process, which can lead to oxygen depletion in the water and harm marine life, the correct answer is (b).
To learn more about nitrogen follow the link:
brainly.com/question/19938608
#SPJ1
The complete question is:
Which of the following results in excess nitrogen in the oceans?
a) Overfishing of marine organisms
b) Industrialization and increased use of fertilizers
c) Decreased atmospheric carbon dioxide levels
d) Decreased use of nitrogen-based fertilizers
Your teacher says that stable ecosystems stay relatively
constant until changing conditions result in a new
ecosystem.
Which statement supports this claim?
OA. Populations in a stable ecosystem are constantly changing in size
until new conditions make them permanent.
OB. Populations in an ecosystem are constantly changing until they
are made stable by changing conditions.
OC. Populations in a stable ecosystem stay exactly the same until they
are made unstable.
D. Populations in a stable ecosystem maintain their size until new
conditions no longer support them.
Stable ecosystems stay relatively constant until changing conditions result in a new
ecosystem. Hence option d supports this claim.
Even with variations, the population size in an ecosystem tends to remain pretty consistent. However, a few factors will have an impact on the population sizes shown in the table below. Growth depends on factors including temperature, pH, and mineral nutrients.
Resilience and resistance are the two main factors that contribute to ecological stability. The capacity of an ecosystem to maintain stability in the face of a disruption is known as resistance. The rate of an ecosystem's recovery following a disruption is known as resilience.
To know about ecosystem
https://brainly.com/question/16761752
#SPJ1