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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Another student thinks a constant should be the speed that the skateboard travels. Is this correct? Explain.
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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In which part of the cell do ribosomes perform protein synthesis? (1 point)
O nucleus
O vacuole
O cytoplasm
O lysosome
Answer:
nucleus
Explanation:
in eukaryotes, ribosome get their order for protein synthesis from the nucleus
Identify the following as radiolarians, foraminiferans, or both, using the following key (use the letters in the blanks to answer the questions):
R = Radiolarians
F = Foraminiferans
RF = Radiolarians and foraminiferans
- These have endoskeletons composed of silicon dioxide.
-Globigerina sp. is an example.
- These have colorful shells composed of calcium carbonate.
-Fossil species of these are helpful in correlating the age of geologic strata.
-These have threadlike, branched pseudopods.
- Stylatractus sp. is an example.
-These are fossil species that form limestone.
- Sediment of these organisms can be greater than 4,000 meters thick.
- These have thin, stiff pseudopods.
- These are found in marine environments.
Radiolarians are protozoans of the phylum Actinopoda. They have tapering pseudopods that protrude like lightning around the cell. All radiolarians are marine. While heliozoans are marine or freshwater.
What are the characteristics of foraminifera?Foraminifera are unicellular organisms that are distinguished from protozoa by having a network of filamentous pseudopods and a carapace (called testa) of variable composition and complexity, in which a cytoplasm provided with one or more nuclei is housed.
RF- They have endoskeletons composed of silicon dioxide.
F-Globigerin sp. it is an example.
R- They have colored shells composed of calcium carbonate.
F- Fossil species of these are useful to correlate the age of geological strata.
F-They have branched and filiform pseudopods.
R-Stylatractus sp. it is an example.
FR-These are fossil species that form limestone.
A- The sediments of these organisms can be more than 4,000 meters thick.
A- These have thin and rigid pseudopods.
FR- These are found in marine environments.
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Which of the following substancces does NOT bioaccumulate and, therefore, is NOT biomagnified through a food chain in the environment?
A. DDT
B. mercury
C. lead
D. oxygen
The substance that does not bioaccumulate and therefore, is not bio-magnified through a food chain in the environment is oxygen (option D).
What is biomagnification?Biomagnification is the process, in an ecosystem, in which a higher concentration of a substance in an organism is obtained higher up the food chain.
The contaminants that can be bio-magnified in a polluted environment are usually heavy metals such as mercury, arsenic, and pesticides such as polychlorinated biphenyls and DDT.
Oxygen is a naturally occurring gas that is beneficial in the environment, hence, does not bioaccumulate in living organisms as it is readily used.
Therefore, oxygen does not bioaccumulate and biomagnify through a food chain in the environment.
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How does an organism composed of relatively small cells have an advantage over one made of larger cells?
The surface area-to-volume ratio of a cell diminishes with growth. If the cell were in the form of a cube, the same reasoning would hold true. The plasma membrane won't have enough surface area if the cell enlarges too much to accommodate the volumetric rise in diffusion rate.
In other terms, a cell gets less effective as it develops. One technique to increase efficiency is to divide, while another is to create organelles with specific functions. Smaller single-celled creatures have a high surface-to-volume ratio, which enables them to rely on material and oxygen diffusion into the cell (and waste diffusion out) to survive. This method can be more effective if the objects have a larger volume to surface area ratio. Larger animals need specialized organs (such as the lungs, kidneys, and intestines) that efficiently increase the surface area accessible for exchange activities, as well as a circulatory system to transport materials and heat energy between the organism's surface and core.
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How to create rain?
The answer is HIGH, COLD,LOW
The answer should be cold
Distinguish between descriptive, correlational, and experimental research
The goal of descriptive research is to offer a snapshot of the existing situation. Finding relationships between variables is the goal of correlational research. Experimental studies aim to evaluate cause and effect.
What is the research about?A population's or phenomenon's characteristics are described through descriptive research. It does not provide an explanation for when, how, or why the features developed. Instead, it answers the "what" query.
With a correlational research design, correlations between two variables—or more—are examined without any of the variables being under the researcher's direct control or manipulation. It is a form of quantitative study that is not experimental.
A study that carefully follows a scientific research strategy is called experimental research. It consists of a hypothesis, a controllable variable, and variables that can be measured, calculated, and compared. Most crucially, controlled environments are used to conduct experimental research.
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Table B. Identities of Rock Samples
Rock sample
1
2
3₂
4
5
6
Name of rock
Describe the importance of DNA and RNA as molecules essential for the transmission of genetic information.
Explanation:
Dna is the genetic informational molecular and its important to identify an organism off another and Rna is a part of the Dna itself
what are two ways in which termites actually contribute to plant growth
Answer:
1. Termites help to aerate the soil and improve drainage.
2. Termites also help to break down organic matter in the soil, which release nutrients that are essential for plant growth.
Explanation:
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How does the carbon cycle and ocean acidification impact coral reefs, and how is human activity having an effect? Relate this to the carbon cycle.
You measured the absorbance of a dilute solution of indigotine at the same intervals across the spectrum and you blanked the spectrophotometer at each wavelength prior to measuring the absorbance of the dye sample. Why?
At each new wavelength, the spectrophotometer was "blanked" to ensure that measurements of the absorption of water and cuvette did not conflict with those of the dye.
Since the water and cuvette likewise ingest light, the spectrophotometer won't gauge their retention, it is essential to "clear" the gadget prior to estimating an example's retention at each new wavelength.
Since the stretch chosen was great for estimating the arrangement due to having high absorbance esteem, the ingestion of indigotin arrangement was estimated at similar spans.
To permit the instrument to zero out these foundation readings and just report values for the build of interest, spectrophotometers are likewise adjusted utilizing a "clear" arrangement that we set up that contains the parts of the answer for be all dissected however not the one build we are trying for.
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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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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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Relate two ways in which a scientific theory and a scientific law are similar
Both scientific laws and scientific theories are based on observations and experimental evidence.
Both will be rejected if if it cannot be made to adapt to the new findings or knowledge.
What are scientific theories?A scientific theory is a well-tested and well substantiated explanation of a natural phenomena that is widely accepted.
There are scientific theories which are commonly accepted today and they include:
big bang theoryatomic theorycell theoryquantum field theoryScientific theories are based on observations and experimental b and must be made to adapt to new knowledge or findings.
In conclusion, a scientific theory can be modified and expanded on or be rejected if certain criteria are not met.
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how is gallium obtained and separated from nearby substances?
PLLSSS HELP
Gallium(III) hydroxide in potassium hydroxide solution can be electrolyzed to produce the metal.
What is the purpose of gallium?It is crucial for Blu-ray technology, mobile phones, blue and green LEDs, and touch switches with pressure sensors. Most metals are easily alloyed with gallium. Particularly in low-melting alloys, it is employed. Because of its high boiling point, it is perfect for recording temperatures that would cause a thermometer to vaporize.
Does gallium react with gold?Furthermore, because gold and gallium can produce alloys with low melting points, it is not surprising that a significant amount of the underlying GaAs dissolves during the alloying cycle. The end result is a contact with good electrical characteristics but one that is quite atypical morphologically and challenging to duplicate.
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Which of the following should not occur when you quote four or more lines from a character's speech in the body of an essay?
Cite the lines
Introduce the lines
Indent the lines
Underline the lines
Underline the lines should not occur when you quote four or more lines from a character's speech in the body of an essay.
What is character's speech?
The mannerisms and speech patterns of the character—shy and reserved, forceful and forthright, sly, humorous—also reveal something about that person's personality. Without using stereotypes, the character's social and ethnic background is reflected in both the speech's substance and delivery. If a character is verbally incapacitated, that should say something.
The character, according to the urban dictionary, can refer to either mental and moral virtues or a lack thereof, or it might be a figure in a play's act. Although the term "character" is frequently used, it should be noted that given the current political context, it is now more frequently used in a derogatory manner.
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Which piece of information provided the stimulus for the shift from traditional classification to modern classification? An understanding that organisms have not changed over time
Answer:
BRO WE GANSTA
Explanation:
The lacrimal gland is also known as the tear gland. It provides the proper ingredients and most of the volume of the tears that bathe the ____ of the eye. Secretions here contain an antibacterial enzyme called ____ , and also antibodies that attack ____ before they enter the body.
Lacrimal glands are the tear glands. These secrete tears that bathe the orbit of the eye. These secrete enzyme called Lysozyme which is antibacterial and secretory IgA antibodies that attack viruses and bacteria.
What are Lacrimal Glands?
Lacrimal glands are the exocrine glands that secrete tear. These are found in most terrestrial vertebrates and some marine mammals. These are present on the orbit above the lateral end of each eye. These secrete watery fluid which cleanses and protects the eye surface.
Secretions of the lacrimal gland contain enzymes such as lysozyme, amylase, secretory IgA antibody, etc. These protect the eye by attacking the bacteria and virus.
Therefore, proper functioning of the lacrimal gland is important for the protection and lubrication of eye.
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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
Choose
an animal that interests you.
Explain how you know that this
organism is an animal.
Explanation:
Elephant:- warm blood and bulky in mass have visible ears, are property of Mammel, Mammel is branch of animal
What are two organisms in the food web that belong in the plant kingdom?
Answer:
They are cut off in the picture, but the plants in the bottom left and right are in the plant kingdom.
Which of the following conclusions can you draw about early human migrations? (4 points)
Group of answer choices
A) Humans migrated to Europe and North America at the same time.
B) Humans migrated to Asia last.
C) Humans migrated to North and South America last.
D) Humans migrated to Australia before they migrated to Europe.
The conclusions which can be drawn about early human migrations is that humans migrated to north and South America last and is denoted as option C.
What is Migration?This is the process which involve the movement of people from one location to another in other to settle down there which could be as a result of availability of resources, job opportunities etc.
It is believed that Humans migrated to North and South America last which is in the period of at least 20,000 years ago and is later than other regions which is why it was chosen as the most appropriate choice.
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What part of the cell is responsible for letting water into our cells when dehydrated?
Answer:
The part of a cell that contains RNA that helps in protein synthesis. The large and abundant vesicle of a plant cell is called a vacuole. It contains fluids and helps in storage of substances, building material, and water. The cell wall, central vacuole, and chloroplasts are the distinguishing parts of a plant and animal cell.
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:
The map below shows the locations of three cities: Los Angeles, California; Oklahoma City, Oklahoma; and Myrtle Beach, South Carolina. The map also includes information about prevailing wind directions (dotted lines) and the location of cold water (solid lines) and warm water (dashed lines) ocean currents.
Rank the cities based on their summer high temperatures, with 1 being the coolest summer, and 3 being the warmest summer.
According to map summer high temperature the correct series of countries are Oklahoma, Oklahoma city, California, South Carolina, Los Angeles, and Myrtle Beach. The most hottest city is Oklahoma.
What is map?Map is defined as a sketch or representation of various countries, routes, rivers, boundaries, oceans, mountains, and building, as well as temperature on a paper which is designed and sketched in such a way that a person can take help to understand the various related topics such as temperature, weather, rivers and routes through it.
The countries which are very near to the equator are considered to be the warmest countries and the people or citizens of that countries are having high percentage of melanin in their body.
Therefore, According to map summer high temperature the correct series of countries are Oklahoma, Oklahoma city, California, South Carolina, Los Angeles, and Myrtle Beach. The most hottest city is Oklahoma.
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There was an accident in the lab, and a sample had the label removed. The sample tested negative for the Benedicts test, Biuret test, and Sudan Red Test. It tested positive for the Lugol test. What type of macromolecule is available in the sample?
Select one:
a.Monosaccharides
b.Lipids
c.Proteins
d.Starches
Type of macromolecules available in the sample is Starches.
Macromolecules are very large molecules that are important for biophysical processes such as proteins and nucleic acids. It is made up of thousands of covalently bonded atoms. Many macromolecules are polymers of small molecules called monomers.
Biopolymers are abundant, naturally occurring large cellular components that perform a variety of functions essential for the growth and survival of organisms. There are four main classes of biopolymers: carbohydrates, lipids, proteins and nucleic acids.
Proteins, carbohydrates, lipids and nucleic acids are the four most important macromolecules. They perform important functions such as providing structural support, providing storage fuel, storing and retrieving genetic information, and accelerating biochemical reactions.
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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.
whats the treatment of gout
Answer:
Non-steroidal anti-inflammatory drugs (NSAIDs) are usually recommended as the first treatment for gout. They work by reducing pain and inflammation during an attack. NSAIDs used to treat gout include naproxen, diclofenac and etoricoxib.
