Answer:
bones
Explanation:
ocean acidification and its relationship to pH a
hi1
Answer:
Ocean acidification: Ocean acidification refers to the decrease in the pH of ocean water.
The pH of ocean water decreases due to the increased in the carbondioxode emissions in the atmosphere because of the burning of fuels. This carbondioxode is dissolved in the ocean water and forms carbonic acid. This carbonic acid is responsible for increasing the pH of ocean water. In one and half century, there is 30% increase occurs in the acidity of ocean water.
steps that you could use to test a hypothesis
Specification of Null hypothesis, alternate hypothesis,setting level of significance, calculation of test statistics and P value, making conclusion.
Explanation:
When you are in a need to compare two or more groups in statistics, you have to use testing of hypothesis. There are two important things that is to be considered in the testing of hypothesis. First is the size of the sample that you choose and the extent of variability in the sample. This is useful for the determination of the differences that exists.
Testing of hypothesis helps in doing this. This can be done with the help of Five steps like, specification of Null and Alternate hypothesis. from this two, one will be selected at the conclusion. Then the next step will be, setting the level of significance. Third is the calculation of P value and the test statistics. This will be compared and at last, either Null or Alternate hypothesis will be selected.
What is the density of a liquid that has a volume of 20 mL and a mass of 3 g?
Explanation:
Given:
Volume of a liquid(V) = 20ml and
Mass of a liquid(M) = 3g
To find, the density of a liquid( [tex]\rho[/tex] ) = ?
We know that,
Density([tex]\rho[/tex] ) = [tex]\dfrac{Mass(M)}{Volume(V)}[/tex]
Density( [tex]\rho[/tex] )= [tex]\dfrac{3}{20}[/tex]
Density( [tex]\rho[/tex] )= [tex]0.15\dfrac{g}{ml}[/tex]
Thus, the density of liquid is [tex]0.15\dfrac{g}{ml}.[/tex]
A stimulus type that occurs within the organisms body is
Answer: Internal stimulus
Explanation: There are two basic types of stimulus: external and internal stimulus. External stimuli are changes to conditions in the organism's physical environment. An internal stimuli are changes to conditions from inside the organism. Examples of internal stimuli are hunger, thirst, and sleepiness.
Internal stimuli such as changes in glucose levels or temperature are detected by specific receptors in the body. These receptors transduce the stimuli into signals which are relayed to the brain. The brain then initiates an appropriate response to maintain homeostasis.
Explanation:A stimulus type that occurs within the organism's body is often related to the internal changes such as glucose levels, temperature or hormonal changes. These stimuli are detected by specific receptors. For example, glucose levels are monitored by specific endocrine cells in the pancreas.
Upon detecting higher glucose levels in the blood (the stimulus), these pancreatic beta cells release the hormone insulin. This hormone travels throughout the body, binding to the receptors of target cells, such as skeletal muscle fibers, fat cells, and liver cells, stimulating them to absorb the excess glucose.
Receptor cells transduce these internal stimuli into signals. They can be categorized on the basis of type of stimuli they transduce, such as chemical stimuli through a chemoreceptor, or temperature changes through a thermoreceptor. This information captured by the receptors is then conveyed to a control center, typically the brain, which interprets the signals and orchestrates an appropriate response to maintain homeostasis.
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What is a reflex arc? what are the roles of the afferent and efferent nerves in this arc?
Answer:
The sensory input (afferent) of the reflex is from two structures in the muscle called spindles and Golgi tendon organs. The output (efferent) is the alpha motor neuron that contracts (tightens) the muscle. (The muscle fibers are sometimes referred to as extrafusal fibers.)
Explanation:
2. This photograph was taken in 1989, 9 years after Mount Saint Helens erupted. Compare this photo with the 1983 photo. What has changed? What looks different? How do you think those changes might have come about? Answer: Type your answer here. Click or tap here to enter text.
I have added the pictures found from another source
Answer and explanation:
If we compare the images, we will realize that there was a little or no vegetation in 1983. However, in 1989, there were shrubs or some plants growing. As mentioned in the statement, there was an eruption in 1980 and so the conditions were not favorable for plants to grow even after 3 years. However, in 6 more years, there was a slow plant growth because the harsh environmental conditions were diminshing and favorable conditions started developing. This process of slow growth has been recognized as a Ecological Succession in biology.
How many chromosomes do sperm cells and egg cells have?
Answer:
23 chromosomes
Explanation:
A human body all together has 46 chromosomes but sperm and egg cells are gametes, or sex cells meaning each half of a parent created 46 all togehter. They are haploid cells while everything else are diploid.
Answer:
In sperm cell and egg cell contain half number of chromosome so that's why sperm cell and egg cell are known as haploid cell i. e. 1n. Haploid cells only found in meiosis (sex cells).
For example, in human beings the number of chromosome in sperm cell is 23 and also 23 in egg cell. When the sperm cell combine with egg cell, diploid cell is formed i. e. 2n. In diploid cells the number of chromosome is double.
Explanation:
What will happen to the species in this ecosystem if the water temperature increases close to the warmest temperature shown on the diagram?
As the temperature of the water increases, it will be affecting water quality, coral reefs, making native species more susceptible to die-off from competition with invasive species and in some cases more at risk of disease.
Explanation:
Water temperature plays an important role in the quality of aquatic life and habitats. Heat flow and temperature change will determine what species or organisms will live or adapt to the water ecosystem. They either adapt to the surrounding, migrate or continue the circle of life.The warm temperature may also affect the oxygen quality because the cold water holds more oxygen than the warm water. The solubility of dissolved oxygen will decrease as the temperature of the water increases. It will be affecting the quality of water and the coral reefs are sensitive to warm temperature which may cause them bleaching events.As the water temperature increases, the ecosystem may affect and the native species are more susceptible to die from invasive species and have more risk of occurring diseases.Answer: Species B will survive and Species A will die out.
Explanation: I just got it right
What is the function of the contractile vacuole in plant-like protists? A)maintenance of food levels
B) maintenance of energy levels
C) maintenance of waste levels
D) maintenance of water balance
Answer:
D) maintenance of water balance
would you expect something with a pH of 4 to be more or less acidic than human blood?
Answer:
The acidity or alkalinity (base) of the body can be measured through blood, urine or saliva. but
When the pH is 7, it is considered neutral. When a substance has a pH greater than 7 esalkaline, and is acidic if it is lower than that value. The ideal pH for our body is between 6 and 6.8. Any value greater than 6.8 is considered alkaline.
Answer: More Acidic
Explanation:
The pH scale ranges from 0 (strongly acidic) to 14 (strongly basic or alkaline).
Human blood usually has a pH of 7.40 so it is leaning more on the basic side of the pH scale (since the middle of the scale is at 7.0)
A pH of 4 is closer to 0 so that means it is pretty acidic
Biology DNA:
-
The bases match up as follows;
Answer:
Adenine, A match-pairs with Thymine, T while Cytosine, C pairs with Guanine, G.
Explanation:
Normally, complementary DNA strand obeys Chargaff's rule of base-pairing in 1: 1 ratio, in a scenario with a template strand where a purine pairs with a pyrimidine via hydrogen bonds to create a novel 3-dimensional (3D) DNA structure.
Pyrimidines are normally Cytosine, C and Thymine, T; while Purines are Guanine, G and Adenine, A. So through complementarity, a purine, G must bind a pyrimidine, C and same case for A to T.
Carbon atoms can form...
A) one double covalent bond
B) two triple covalent bonds
C) four single covalent bonds
D) three double covalent bonds
A population of beetles are kept in a controlled ecosystem. No beetles are
allowed to enter or leave. The graph below shows the population of beetles.
Beetle Population
Population size
Time
Which best describes the ecosystem at Point A?
O
A. The death rate is higher than the birthrate.
O
B. It has reached carrying capacity.
O
C. There is no competition for resources.
O
D. The population is decreasing,
Answer:
According to what is observed in point A of the graph, referring to the population of beetles, there is no competition for resources.
Explanation:
The graph shows that a controlled population of beetles, where other individuals do not enter or leave, experiences progressive growth over time. This is because the population has sufficient resources to guarantee their development, the birth rate exceeds that of mortality and there is no competition for these resources.
The adequate amount of resources allows that, at point A, the carrying capacity has not been reached, a consequence of no competition among members of the same species, which ensures that the net population growth rate is maintained or even increase.
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Answer:all these answers wrong this is right
Explanation:
What are the functions of the structures labeled X?
The structures labeled X likely represent organelles, specifically the Golgi apparatus which modifies and packages proteins, and the nucleus which controls cellular activities and contains genetic material.
Explanation:The structures labeled X are likely referring to specific organelles found within a cell, such as the Golgi apparatus and the nucleus. The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other parts of the cell. The nucleus serves as the control center of the cell, housing most of the cell's genetic material and coordinating activities like growth, metabolism, protein synthesis, and cell division (mitosis).
Organelles are specialized structures within cells, each performing distinct functions necessary for cell survival and function. The Golgi apparatus is involved in modifying and sorting proteins and lipids, while the nucleus houses the cell's DNA and coordinates crucial activities.
The structures labeled X in the provided context are likely to be organelles within a cell. Organelles are specialized structures that perform distinct functions necessary for the cell to live and function properly. For example, the Golgi apparatus is an organelle involved in modifying, sorting, and packaging proteins and lipids for secretion or for use within the cell. The nucleus is another organelle that acts as the control center of the cell, housing the cell's DNA and being responsible for coordinating activities such as growth, metabolism, protein synthesis, and cell division (mitosis).
Organelles work together to ensure that cells can perform all necessary functions to survive and contribute to the larger organism. They are often compared to tiny organs within a cell, hence the name 'organelle.' Each organelle has a unique structure that enables it to execute its specific function effectively, demonstrating the relationship between structure and function at a cellular level.
Here are some important keywords and concepts from the provided text:
Organelles: Specialized structures within cells.
Golgi Apparatus: Involved in modifying, sorting, and packaging proteins and lipids.
Nucleus: Houses the cell's DNA and coordinates crucial activities.
Proteins and Lipids: Substances modified and sorted by the Golgi apparatus.
Cell Survival: Organelles play a crucial role in ensuring cell survival.
Control Center: Nucleus acts as the control center of the cell.
DNA: Genetic material housed in the nucleus.
Coordination of Activities: Nucleus is responsible for coordinating various cellular activities.
Mitosis: Process controlled by the nucleus, involving cell division.
Structure and Function: Relationship between the structure of organelles and their specific functions.
Cellular Level: Understanding the relationship between structure and function at the cellular level.
Tiny Organs: Organelles are often compared to tiny organs within a cell.
Cell Division: Process controlled by the nucleus.
Modification and Sorting: Functions performed by the Golgi apparatus.
Packaging: Golgi apparatus packages substances for secretion or for use within the cell.
These keywords highlight the key concepts related to organelles, their functions, and the fundamental role they play in the survival and functioning of cells.
A _____ is an ancestor to chloroplast.
A) Aerobic Bacteria
B) Anaerobic Bacteria
C) Mitochondria
D) Animal Cell
Answer:
Aerobic Bacteria
Explanation:
I hope you get this correct
Urey and Miller attempted to mimic conditions on early Earth to illustrate how the origin of life may have occurred billions of years ago. Which statement would provide the most evidence that early Earth's conditions were suitable for the formation of carbon-based life?
A) Liquid from the sampling probe contained more than twenty different amino acids.
B) The pH of the ocean waters was more acidic with less salinity than oceans today.
C) The atmosphere contained heavy isotopes of hydrogen, like tritium, in the water molecules.
D) The air sampled from the primitive atmosphere contained diatomic nitrogen rather than ammonia.
Answer:
The correct statement is liquid sample from the sampling probe containing more than twenty different amino acids.
Explanation:
The experiment is done by Miller- Urey in 1952 to create the atmosphere similar to the ancient time of earth's atmosphere to discover whether there was any similarity or not.
This experiment shows 20 different amino acids that are produced in the experiment and also gives the idea that earth's original atmosphere had different from gas that is used in Miller's experiment.
Answer:
A) Liquid from the sampling probe contained more than twenty different amino acids.
Explanation:
took the usatestprep quiz
An ecological pyramid is sometimes used to show both the flow of matter and energy in an ecosystem. The pyramid narrows as matter and energy flow from the bottom to the top. Draw a conclusion about what this pyramid tells you about the energy in this ecosystem.
Since the pyramid narrows from bottom to top, we can conclude that the amount of energy keeps on decreasing as we move to a higher trophic level.
Explanation:
Ecological pyramid are graphical representation of data that shows the number of organisms,amount of energy and amount of biomass at each trophic level in a food chain.
Food chain is a sequence of organism who are related to each other by the process of Eating and being Eaten up.
The base of the ecological pyramid represents the producer or the first trophic level while the apex of the pyramid represents the cosumers at higher levels of food chain; other consumer trophic levels are in middle.
There are three types of Ecological pyramids:
Pyramid of number: This shows the number of organisms of a population present at each trophic level.Pyramid of energy: This shows the amount of energy available at each trophic level and clearly depicts the energy loss at successive trophic level.Pyramid of biomass: This pyramid represents the total dry weight of living beings present at each trophic level.The pyramid of Energy is always an upright pyramid because amount of energy transferred from one trophic to next keeps on decreasing as the energy is lost in form of heat and is also used up by the organism at a given trophic level and only the remaining is part to the next.
In nature, animal populations are dynamic. This means they are changing due to various circumstances. The population of rabbits in certain areas of the world are affected by the population of foxes, for example. Using reasoning, which model shows the relationship between the two populations?
Answer:
Think foxes eat rabbits. The more rabbits than the more foxes have to eat which will cause a decrease in rabbit population and likely an increase in fox population.
Explanation:
Rabbits and foxes have a predator-prey relationship. If a community has an abundant number of rabbits, then the population of foxes in that area will also increase as there will be abundant food for them. As the population of foxes increases, the population of rabbits will start to decrease as there will be more predators to feed on them. Hence, if the population of foxes keeps on increasing, rabbits may migrate or become completely eradicated from that particular area.
7. What is the room temperature in all
3 temperature scales?
Room temperature is measured as approximately 20 to 25 degrees Celsius, 68 to 77 degrees Fahrenheit, and 293 to 298 Kelvin. These represent the same physical state, but are in different temperature scales.
Explanation:The room temperature in various scales such as Celsius, Fahrenheit, and Kelvin can differ in numerical values, but they represent the same physical state. In the Celsius scale, room temperature is generally considered to be around 20 to 25 degrees. In the Fahrenheit scale, room temperature is around 68 to 77 degrees. In the Kelvin scale, which measures absolute temperature, room temperature is roughly 293 to 298 Kelvin.
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Room temperature in Celsius is about 20 to 22 degrees, in Fahrenheit it equates to approximately 68 to 72 degrees, and in Kelvin, it is around 293 to 295.
The room temperature is a common reference for ambient temperature in various scenarios. In terms of the three main temperature scales - Celsius, Fahrenheit, and Kelvin - room temperature is commonly accepted to be around 20 to 22 degrees Celsius, which can be converted to Fahrenheit or Kelvin using temperature conversion equations.
Room temperature in Fahrenheit is approximately 68 to 72 degrees. To convert Celsius to Fahrenheit, the formula is [tex]F = \frac{9}{5}C + 32 \\[/tex]
In Kelvin, room temperature is about 293 to 295 K. The conversion from Celsius to Kelvin is straightforward: add 273.15 to the Celsius temperature K= C + 273.15
Why does sound intensity decrease as the distance from the source increases?
Answer:
the intensity decreases because the sound has to stretch more and becomes more quiet
Explanation:
with more distance the sound waves start to lessen and almost stretch out and cover more distance but lessen in intensity due to the stretching
Final answer:
Sound intensity decreases with distance due to the energy of the sound wave being spread over a larger area and absorbed by objects, following the inverse square law.
Explanation:
Sound intensity decreases as the distance from the source increases primarily due to the phenomenon where the energy of the sound wave is spread over a larger and larger area. This spatial distribution of energy is well explained by the inverse square law, indicating that sound intensity is inversely proportional to the square of the distance from the source. In an unobstructed environment, sound emitted from a point source spreads out in a spherical manner, leading to a decrease in sound intensity with increasing distance.
In addition to this spatial dispersion, sound energy is also absorbed by objects and converted to thermal energy due to the viscosity of air, and during sound wave compression and rarefaction cycles, heat is transferred to and from the air, further reducing the organized energy into random thermal motions. These effects contribute to the decrease in sound wave amplitude, and subsequently, sound intensity as the distance from the source increases.
What does a model of the rock cycle show?
a. the amount of earths carbon cannot be determined
b. the amount of earths carbon increases
c. the amount of earths carbon decreases
d. the amount of earths carbon is constant
Answer:
I believe it’s “B”
Explanation:
Answer:
d. the amount of earths carbon is constant
Explanation:
Rock cycle is the name given to the natural process of transformation of the roots, capable of changing their moneralic composition. This cycle is proof that the terrestrial lithosphere has a dynamic character, which is the result of the actions of several endogenous and exogenous factors on the terrestrial surface. This cycle also allows us to understand how the amount of carbon in the earth is constant, allowing the transformation of the rocks in an evident way. It is through this process that we perceive the different types of rock that exist on the planet, if this process did not happen, the lithosphere would be composed only of magmatic rock.
As Henry is exercising he pushes against a beam with a force of 25 Newton’s.The beam does not move.Which statement is true.
Answer: During the action there was equal and opposite force.
Explanation: since the force exerted by Henry is equal to the resisting force of the beam it won't move.
The plant ground tissue system consists of three tissues that can be distinguished by which of the following?
O a. Cell wall structures
O b. Lysosomal content
O c. Mitochondrial shape
O d. Enzymatic activity
O e. Amino acid composition
Explain why the soil doesn’t qualify as an organism despite containing billions of living cells
Answer:
Soil doesnt qualify as an organism despite containing billions of living cells simply due to what soil is. Soil is organic remains like decomposed organisms, minerals, and rock. It supports life but doesn't it doesnt have life itself. It doesn't breathe,grow, or eat.
Explanation:
The reason why soil does not qualify is because of organic.
Why the soil doesn’t qualify as an organism?Soil doesn't qualify since an organism contains billions of living cells simply because of what soil is. Soil is organic remains such as decomposed organisms, minerals, and rock. It supports life but doesn't it have life itself. It can't breathe,grow, or eat.
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Why do predictions by the European weather model sometimes differ from predictions made by the American weather model?(1 point)
The two models assimilate data differently using different equations.
The two models use different types of data measurements.
The two models are designed to model different types of weather.
The two models focus on different parts of the world.
Answer:
The two models assimilate data differently using different equations.
Explanation:
The weather models are based on mathematical equations in which the input variables are weather observations such as temperature, pressure, wind, moisture, etc that are obtained from the weather satellites and ground sensors. Using a process known as data assimilation, these weather observations are used to initialize numerical forecast models by combining the observations with prior forecasts.
The two global weather models, the European (European Center for Medium-Range Weather Forecast) and the American (National Weather Service’s Global Forecast System) models provide predictions all over the world. The mesoscale models or fine scale models can predict really small weather observations on more specific regions.
The atmosphere is divided into a three-dimensional grid in each model. At each grid point, the assimilated data is given and the mathematical equations are applied which are then stepped forward in time. The different weather models assimilate data differently using different equations and the outputs obtained over many time steps give the future weather.
Which type of star system is pictured?
Answer:
open cluster
Explanation:
Answer:
Which type of star system is pictured?
Open Cluster
Explanation:
Edgen 2022
Survivorship Curves for Three Different Types of Organisms
1000
Number of survivors
(log scale)
50
100
Percentage of maximum life span
Which survivorship strategy is used by the type III species?
Answer:
As the picture for the curves is not given, lets look at the type III species generally.
Explanation:
A survivorship curve can be described as a graph which represents the number of individuals which are able to survive to a particular age for each given species.
The Type III species can be described as those species of the survivorship curve which have a high death rate immediately after death. This is because these organism tend to produce a wide number of eggs and as protection is not taken for them by the parents, hence most of the fertilized eggs or zygotes tend to die. These organisms hence produce a large number of eggs so that some of them will have the capability to survive.
Which is a type of irradiation used to prevent food-borne illnesses?
Answer:Gamma
Explanation: Gamma can be used to destroy different bacteria that causes food poisoning, it can also be used to preserve food and also serve as a prevention against spread of pests. irradiation can serve many purposes. Gamma radiation is used for treatment which include killing of bacteria and deinfestation of agricultural product. It is used to kill microorganisms on a variety of product, and it is ideal for many products. Irradiation is the process of exposing food to a very high source of energy. Gamma irradiation make use of high energy gamma rays that are emitted by radioactive cobalt 60 or Cesium 137.
What are the macromolecules DNA and RNA referred to as?
Answer:
Nucleic Acids
Explanation:
Between carbohydrates, lipids, proteins, and nucleic acids, DNA and RNA molecules most accurately fall under the macromolecular category of nucleic acids.
DNA and RNA are referred to as nucleic acids. DNA holds genetic information and controls cellular activities, while RNA is involved in protein synthesis. Both play critical roles in the continuity of life.
Nucleic acids are critical for the continuity of life because they carry a cell's genetic blueprint and instructions for cellular functioning.
DNA stands for deoxyribonucleic acid and is the genetic material found in all living organisms.RNA stands for ribonucleic acid and is primarily involved in protein synthesis.DNA has a double-helix structure, which is essential in storing and transmitting genetic information.Nucleic acids are composed of monomers called nucleotides, which consist of a phosphate group, a sugar, and a nitrogenous base.DNA controls cellular activities by regulating genes, while RNA serves as an intermediary in the synthesis of proteins based on DNA's instructions.What can’t pet DNA tests tell us about our pets?
Pet DNA tests can provide valuable information about a pet's genetic makeup and potential health risks, but they have limitations. These tests cannot provide information about a pet's age, overall health, personality, behavior, training, or ancestry beyond a certain number of generations.
Explanation:Pet DNA tests can provide valuable information about a pet's genetic makeup, including their breed composition and potential health risks. However, there are limitations to what these tests can tell us about our pets.
Firstly, pet DNA tests cannot provide information about the age or overall health of a pet. These tests are focused on genetic information and do not provide insight into other aspects of a pet's well-being. Additionally, these tests cannot determine a pet's personality, behavior, or training. These traits are influenced by a combination of genetics and environment and cannot be determined solely through DNA analysis. Pet DNA tests also cannot provide information about a pet's ancestry beyond a certain number of generations. While they can identify genetic markers and breed percentages, they cannot trace a pet's lineage back indefinitely.
Therefore, while pet DNA tests can provide valuable information about a pet's genetic makeup, it is important to remember that there are limitations to what these tests can tell us about our pets.