A student thinking that a constant should be the speed that the skateboard travels is not correct.
What is Speed?This is referred to as the rate of change of position with time and the unit is meter per second (m/s).
Speed = distance/time
For a body to have a constant speed, then it means that the sum of all the external forces acting on it is zero. This isn't possible because the numerous forces such as friction, drag etc won't always equal zero which therefore means the student's reasoning is false and not correct and is the most appropriate choice.
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Describe Lamarck's theory of inheritance of acquired characteristics. Why is it invalid?
The theory of evolution proposed by Lamarck tells us that living beings were not created from nothing but were the result of evolution from much simpler beings.
How does evolution occur according to Lamarck?These evolutionary characteristics were obtained when an individual adapted to a change in situation or environment that occurred through a habit. He says then that evolution occurs by characters acquired through life, these are passed to its germ line and so little by little the evolution is taking place.
This theory was not taken into account since it is impossible to transfer acquired characteristics from the somatic line to the germ line. Giving then as erroneous this theory proposed by Lamarck.
Therefore, we can confirm that the theory of evolution proposed by Lamarck tells us that living beings were not created from nothing but were the result of evolution from much simpler beings.
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WILL GIVE BRAINLIEST - Defining a system under study and making a model of it are tools for developing a better understanding of natural phenomena in science. Give an example of how system models are used by scientists to investigate natural and designed systems.
Models are used to symbolize components of the herbal international which can be too small, large, complex, or hard to examine or give an explanation for directly. For example, atoms are too small to examine directly, so fashions are used to visualise components of atoms .
Models use acquainted gadgets to symbolize unexpected things. Models allow you to visualize, or photo to your mind, some thing this is hard to look or apprehend. Scientific models can assist scientists talk their ideas, apprehend processes, and make predictions.A version of the motions of the sun, moon and earth (that you participated in closing year) A version of predicting eclipses.
Models that designate climate phenomena may be used to are expecting climate.Scientists use fashions as a way to help withinside the visualization of modern-day expertise of a gadget withinside the country that it's far in at the existing time.
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A student says a possible hypothesis for the experiment about study time is, “If students study for different lengths of time, then they will get different test scores”. What is wrong with this hypothesis?
Answer:
The hypothesis is too general and does not state a specific prediction.
Explanation:
Table B. Identities of Rock Samples
Rock sample
1
2
3₂
4
5
6
Name of rock
What does this quote mean? " "This would provide a selective advantage for the brightest males which could lead to a runaway process where males would get brighter and brighter with each generation. Even females who bucked the trend would be at a disadvantage for, if they chose to mate with plainer males, they risk producing drab sons who would be less likely to be picked as mates in their turn".
The meaning of the given quote: This would provide a selective advantage for the brightest males...Even females who bucked the trend would be at a disadvantage for, if they chose to mate with plainer males, they risk producing drab sons who would be less likely to be picked as mates in their turn" is given below.
This means that in the process of mating, the brightest males would be selected first which leads to a selection advantage for them and even if females decided not to pick the brightest males, this would be to their disadvantage as their offspring would be likely to be selected last, if at all.
What is a Quotation?This refers to the use of inverted commas to show the direct words of a speaker in a given sentence.
Hence, we can see that The meaning of the given quote: This would provide a selective advantage for the brightest males...Even females who bucked the trend would be at a disadvantage for, if they chose to mate with plainer males, they risk producing drab sons who would be less likely to be picked as mates in their turn" is given below.
This means that in the process of mating, the brightest males would be selected first which leads to a selection advantage for them, and even if females decided not to pick the brightest males, this would be to their disadvantage as their offspring would be likely to be selected last, if at all.
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How do graded potentials lead to the generation of an action potential in a single
neuron?
When a graded potential causes hyperpolarization in a neuron, an action potential is not occur, where as If a graded potential causes depolarization, an action potential is more likely to occur.
What are the types of neuron ?The neurons are the basic nerve cell of the nervous system where the presynaptic neuron emits the nerve impulse and the postsynaptic neuron receives this impulse.
The function of neurons can be Sensory which handle information from the sensory organs like skin, eyes, ears, nose and Motor which emit signals from the brain and spinal cord to the muscles.
Other neuron are Interneurons form a bridge connection between two neurons depending on how distant the neurons are from each other.
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What 2 events in nature can hinder the process of carbohydrate production? Explain your answer
The events in nature that may seriously hinder the process of carbohydrate production include storm weather conditions or extreme temperatures (i.e. both very cold and warmer temperatures).
How are carbohydrates produced in nature?The carbohydrates are produced in nature through a complex series of chemical reactions known as photosynthesis, which is carried out by plants that may produce simple carbohydrates such as glucose of complex carbohydrates (cellulose).
In conclusion, the events in nature that may seriously hinder the process of carbohydrate production include storm weather conditions or extreme temperatures (i.e. both very cold and warmer temperatures).
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Which factors influence ocean currents? Select the three correct answers.
A. Earth's rotation
B. Salinity
. C. Wind
D. Ocean depth
Emil is planning to perform a tightrope walk for his community talent show. He wants
to train a specific area of his brain that will allow him to perform at his best. Which
area of his brain should he focus on?
For Emil to train his specific area of brain that will allow him to perform at his best, he should focus on his cerebellum.
Brain is the largest and most complex organ of the body. It acts as the regulatory center of the body that controls and regulates each and every action performed by the body, either voluntary or involuntary. The brain is divided into three parts: forebrain, midbrain and hindbrain.
Cerebellum is the part of the hindbrain. It is present above the brain stem. The function of cerebellum is to regulate the movement and coordination of the body. If the cerebellum is damaged, it can affect all the actions related to movement like walking, bending, no control upon the movement, etc.
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Please help me answer this question as soon as possible!!
You observe two beakers containing clear liquid and ice cubes. In the first beaker, the ice cubes are floating. In the second, the ice cubes are on the bottom of the beaker. Write a hypothesis to explain the difference in your observations about the two beakers.
When water freezes into ice the hydrogen bonds formed allow them to be spaced farther apart, making them take more space and the overall density decreases, so ice float in the water.
What is density ?The density of can be referred as the mass per unit volume which means the ratio between mass and volume, where how much stuff an object has in a unit volume.
It is a measurement of matter, where it mainly presents the mechanism of matter is bind together, put forwarded by the Greek scientist Archimedes
Density = Mass/Volume
When ice melts its surface area increases so it is present at the bottom of the beaker.
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A solution with a pH of 3 has how many more protons in it than a solution with a pH of 7?
a.
10 times
b.
100 times
c.
1000 times
d.
10,000 times
Answer:
An acid is used to bring the pH of a solution from pH 9 to pH 6 the many times more acidic is the final solution than the initial solution is that of option b. 10 .
Which is greater acidic a pH of 6 or a pH of 8?
A pH much less than 7 is acidic. A pH more than 7 is simple. The pH scale is logarithmic and as a result, every entire pH fee underneath 7 is ten instances greater acidic than the subsequent better fee.pH much less than 7 is acidic. A pH more than 7 is simple. The pH scale is logarithmic and as a result, every entire pH fee underneath 7 is ten instances greater acidic than the subsequent better.
The pH is a degree of the attention of hydrogen ions, the acidity or alkalinity of a solution. The pH scale is commonly among zero and 14. Aqueous answers at 25 ° C with a pH of much less than 7 are acidic and simple or alkaline solution are people with a pH of more than 7.
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Explanation:
describe a natural phenomenon in 3-5 sentences?
hi brainly user! ૮₍ ˃ ⤙ ˂ ₎ა
⊱┈────────────────────────⊰
Describe in 3-5 sentences a natural phenomenon Aurora borealis?⊱┈────────────────────────⊰
Answer:
The aurora borealis is a fascinating show of colors and lights of different intensity, in the form of yellow-green, bluish, purple, pink, reddish curtains, changing their shape and color for a few minutes. It is a natural phenomenon that occurs every eleven years, especially visible near the geomagnetic poles.Auroras are due to the collision between oxygen, nitrogen, hydrogen, helium molecules in the Earth's atmosphere and energetically charged particles from around the Sun, brought to Earth by the solar wind.
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large instine is the wildest part of
Question 1 of 10 The diagram shows a plant cell. 1 2 3 4 Which label points to the location in the cell where the first step of cellular respiration occurs?
The location in the cell where the first step of cellular respiration occurs is 2, i.e., a mitochondria. The correct option is B.
What is mitochondria?The majority of the chemical energy required to drive a cell's metabolic operations is produced by mitochondria, which are membrane-bound cell organelles (mitochondrion, singular).
Adenosine triphosphate, a tiny molecule, serves as a storage container for the chemical energy generated by the mitochondria (ATP).
Because they assist in cellular respiration, the process by which energy is extracted from food, mitochondria are known as the powerhouse of the cell or energy manufacturers.
The first stage of cellular respiration, known as glycolysis, takes place in the cytoplasm of the mitochondria.
To produce cellular energy, the six-carbon sugar molecule of glucose is broken down into three-carbon molecules during the process known as glycolysis.
Thus, the correct option is B.
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If the rosehip neuron is present in humans what does it show us or explain?
Answer: Rosehip appears to be an inhibitory neuron, which regulates the flow of information to certain parts of the brain. Saplakoglu reports the rosehips seem to connect to pyramidal neurons, an “excitatory” neuron that makes up about two-thirds of the neuron cells in the neocortex.
Explanation:
what is photosynthesis ?explain it with vivid examples
photosynthesis is the process by which green plant use energy from sunlight to manufacture their own food by combining carbon dioxide , water and mineral salt
example plants, algae (diatoms, phytoplankton green algae, euglena
PLEASE HELP (PSYCH)
Question 3 (1 point) When using the correlational research design, researchers report a number called the "correlation coefficient" This number indicates strength & direction of the relationship between two variables and falls between -1 and +1. Choose the correlation coefficient that demonstrates a moderate relationship showing fewer depression symptoms in people who report higher community engagement? a) -0.61 b) -0.19 c) +0.17 d) +0.61
The correlation coefficient that demonstrates a moderate relationship showing fewer depression symptoms in people who report higher community engagement is +0.61. That is option D.
What is correlation coefficient?Correlation coefficient is a measure that is used statistically to know the extent of change that can be brought about on a variable through the change of another variable that is related to it.
The correlation coefficient is measured by dividing the covariance by the product of the two variables' standard deviations.
This number indicates strength & direction of the relationship between two variables and falls between -1 and +1.
There are various types of correlation coefficient which are the negative correlation coefficient and the positive correlation coefficient.
An example of a positive correlation coefficient is +0.6 which shows that there are fewer depression symptoms in people who report higher community engagement.
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What is the purpose of scientific argumentation?
A scientific argument is a method that researchers use to direct their work. In order to ultimately improve rational explanations and experimental designs, scientists point out flaws and limitations in other people's arguments. Evidence-based arguments is the term for this technique.
The aim of scientific reasoning is to assess the reliability and validity of methods and results. It would be appropriate to accept the scientific research if one could validate and demonstrate all of the points made. This part is structured around the four components of scientific argumentation
EvidenceReasoningStudent interactionCompeting claimsThe method by which research, as a field, creates and greater integration, is through scientific debate. Other scientists assess and analyze the assertions, supporting evidence, and explanations of that evidence when scientists make arguments in favor of novel theories.
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does phloem gives mechanical support to plant
Answer:
no
Explanation:
Phloem won't give any mechanical strength to the plants. Xylem and Phloem are the parts of the vascular bundle. Vascular bundles are defined as the strands of conducting vessels having xylem and Phloem to supply water from roots and food prepared by leaves to the remaining parts of the plant.
Changes in pH alters the enzymatic activity by modifying electric charges
A True
B) False
Changes in pH alters the enzymatic activity by modifying electric charges hence the statement is False.
Briefing:The activity of the enzyme slows down and finally stops when the pH value deviates from the optimum range. The substrate houses the enzyme's active site.
What generates an electric charge?When electrons are added to or taken away from an object, an electrical charge is produced. An object acquires a negative charge when electrons are introduced to it because electrons have a negative charge. An object acquires a positive charge when its electrons are removed.
What is an example of an electric charge?The ability to conduct electricity is a characteristic of many fundamental, or subatomic, components of matter. As an illustration, protons and neutrons both have positive charges but electrons have a negative charge.
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Explain how proteins are involved in mitosis. WILL GIVE BRAINLY
Explanation:
Mitosis and endocytosis are two fundamental cellular processes essential for maintaining a eukaryotic life. Mitosis partitions duplicated chromatin enveloped in the nuclear membrane into two new cells, whereas endocytosis takes in extracellular substances through membrane invagination. These two processes are spatiotemporally separated and seemingly unrelated. However, recent studies have uncovered that endocytic proteins have moonlighting functions in mitosis, and mitotic complexes manifest additional roles in endocytosis. In this review, we summarize important proteins or protein complexes that participate in both processes, compare their mechanism of action, and discuss the rationale behind this multifunctionality. We also speculate on the possible origin of the functional reciprocity from an evolutionary perspective.
What are the characteristics of carbohydrates? (select all the apply)
(A) contains phosphorus
(B) building material
(C) moves on its own
(D) source of energy
Carbohydrates are the nutrients that are most frequently employed as an energy source. Monosaccharides are single sugar molecules that serve as the building for all other sugars and carbohydrates. Thus option B and D are correct.
What is carbohydrates?Sugar molecules make up carbohydrates, or carbs. Carbohydrates are one of the three primary nutrients included in foods and beverages, along with proteins and fats.
Glucose is created by your body's breakdown of carbs. The primary source of energy for the cells, tissues, and organs in your body is glucose, sometimes known as blood sugar.
A vast variety of both good and bad foods, including bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks, corn, and cherry pie, include carbohydrates.
They can take on various shapes as well. Starches, fibers, and sugars are the most common and ubiquitous types.
Therefore, carbohydrates serve as source of energy and building material.
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Move the terms into the correct empty boxes to complete the concept map describing the four types of macromolecules
The four main categories of biological macromolecules are carbohydrates, lipids, proteins, and nucleic acids.
Each is a vital part of the cell and carries out a variety of tasks. These molecules make up most of a cell's mass when they are all combined.
They play a crucial role in the cell and carry out key tasks. Proteins are necessary for immunity, growth, and maintenance, and they also serve as enzymes, hormones, and other things. The primary source of energy is carbohydrates.Macromolecules, for instance, offer structural support, serve as a reservoir for stored energy, have the capacity to store and retrieve genetic information, and can speed up biological operations.Proteins, carbohydrates, nucleic acids, and lipids are the four main categories of macromolecules that perform these crucial roles in a cell's life.Stores and transmits information are nucleic acids. Carbohydrates: The primary source of energy, a source of fuel, and the building blocks of body structure. Lipid: A lipid is an insulator and a fuel reserve. Protein: Provides movement, defense, transport, enzymes, and structural support.Learn more about macromolecules here:
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DNA is composed of sugar,phosphate and four ?
ASAP!! I WILL GIVE BRAINLYIST
Which hypothesis is NOT testable?
Plastic should be recyclable.
Plastic has a low boiling point.
Plastic has a high melting point.
Plastic does not break down in the environment.
Might Be wrong but I think C
Why do temperature changes impair an enzyme's ability to catalyze reactions? Select all
that apply.
1.)It causes the enzyme to denature
2.)It increases the activation energy
3.)It causes the enzyme to fold into a quaternary structure
4.)It changes the shape of the active site
A sample of an unknown liquid has a volume of 24.0 mL and a mass of 6 g. What is its density? Show your work or explain how you determined this value. I believe you would divide the mass x volume, 24,0 divided by 6
which = 4 GIVING 31 POINTS ANSWER FAST!!!!!!!!!!!!!!!!!!
The density of the unknown liquid sample will be 4.0 g/.mL
What is density?The density of a substance is the ratio of the mass of the substance to its volume.
This is mathematically expressed as:
Density = mass/volume.
In this case:
Volume of unknown liquid sample = 24.0 mL
Mass of unknown liquid sample = 6 g
Density of the unknown liquid sample = 24.0/6
= 4.0 g/mL
Thus, the density of the unknown liquid sample us 4.0 g/mL
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in many single-celled organisms, reproduction occurs asexually by producing spores and sexually by producing?
In most of the single celled organisms like fungus, spyroghyra, etc, reproduction occurs asexually.
To lower your dietary cholesterol, you should reduce your intake of
a. vegetable oils.
b. animal products.
c. protein.
d. cereal.
In a garden, you see bees roaming around red roses. The small, white
chickweeds are almost untouched. Why do you think this is happening?
It is because of the color and the smell of the strong flower which red roses have , with this because bees feed on their nectar and pollen.
What are the benefits of chickweed?Chickweed has been used for centuries to treat illnesses and provide comfort, including lowering inflammation and battling germs. Additionally, it might help you maintain your weight and function as an expectorant when you're sick. On the stems, there is also no row of hair. Instead, joints can be seen in the stems. The plant has the consistency of string but is not edible despite not being poisonous.
What kind of bees do roses attract?The abundant anthers of wild roses and Rosa rugosa are also a favorite source of pollen for honey bees and other solitary bee species. Thanks to the amazing anthers inside the flower of this wild rose, worker honey bee Apis mellifera once more has pollen baskets on its hind legs filled with nectar.
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