Answer:
When a neural impulse reaches the end of an axon, it causes the tiny oval sacs at the end of the axon to release chemicals called neurotransmitter.
(30 points) Mosquitoes can carry and transmit many diseases to humans. In the past, the insecticide DDT was heavily used to reduce mosquito populations in order to reduce instances of disease transmission. However, after some time, mosquito populations developed a resistance to DDT, which made the DDT less effective in reducing mosquito populations.
Based on what you’ve learned about natural selection, in 3–5 sentences, describe how mosquitoes may have come to develop this resistance.
Mosquitoes resistant to DDT are also immune to mosquito net insecticide. A single genetic mutation causes resistance to DDT and pyrethroids according to new research in the diary Genome Biology.
What is DDT and why was it banned?Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in agri company . The United States prohibited the use of DDT in 1972. Some nations outside the United States still use DDT to manage of mosquitoes that laid malaria.
Thus, Mosquitoes resistant to DDT are also resistant to mosquito net insecticide.
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Mosquitoes may have developed resistance to DDT through the process of natural selection. Initially, within a mosquito population, there may have been genetic variation in their response to DDT exposure.
Some mosquitoes may have possessed genetic traits that made them more tolerant to the effects of DDT, while others may have been more susceptible. When DDT was heavily used, the susceptible mosquitoes were killed, while the tolerant ones survived and reproduced. Over time, this led to an increase in the proportion of mosquitoes with the genetic traits for DDT resistance, as they were the ones passing on their genetic information to the next generation. This process of natural selection favored the survival and reproduction of mosquitoes with DDT resistance, resulting in the development of a resistant population.
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Complete the following food chain.
hawk
⇒
mouse
⇒
grass
Answer:
Grass => mouse => hawk.
Explanation:
Grass is a Producer of Food chain, followed by next trophic level of our food chainMouse is a Primary Consumer of Food chain,Hawk is a Secondary Consumer of Food chain.Another Example of our food chain on this ecosystem:
Grass => Grasshopper => Frog => Snake => Eagle.Do you think human population growth is a concern in the United States? Explain your reasoning.
Answer:
In my opinion, Yes the human population growth is a concern in the United States because Human population growth impacts the Earth system in a variety of ways, including:
Increasing the extraction of resources from the environment. These resources include fossil fuels (oil, gas, and coal), minerals, trees, water, and wildlife, especially in the oceans. The process of removing resources, in turn, often releases pollutants and waste that reduce air and water quality, and harm the health of humans and other species.Increasing the burning of fossil fuels for energy to generate electricity, and to power transportation (for example, cars and planes) and industrial processes.Increase in freshwater use for drinking, agriculture, recreation, and industrial processes. Freshwater is extracted from lakes, rivers, the ground, and man-made reservoirs.Increasing ecological impacts on environments. Forests and other habitats are disturbed or destroyed to construct urban areas including the construction of homes, businesses, and roads to accommodate growing populations. Additionally, as populations increase, more land is used for agricultural activities to grow crops and support livestock. This, in turn, can decrease species populations, geographic ranges, biodiversity, and alter interactions among organisms.Increasing fishing and hunting, which reduces species populations of the exploited species. Fishing and hunting can also indirectly increase numbers of species that are not fished or hunted if more resources become available for the species that remain in the ecosystem.Answer:
Yes the human population growth is a concern in the United States because Human population growth impacts the Earth system in a variety of ways, including:
Increasing the extraction of resources from the environment. These resources include fossil fuels (oil, gas, and coal), minerals, trees, water, and wildlife, especially in the oceans. The process of removing resources, in turn, often releases pollutants and waste that reduce air and water quality, and harm the health of humans and other species.
Increasing the burning of fossil fuels for energy to generate electricity, and to power transportation (for example, cars and planes) and industrial processes.
Increase in freshwater use for drinking, agriculture, recreation, and industrial processes. Freshwater is extracted from lakes, rivers, the ground, and man-made reservoirs.
Increasing ecological impacts on environments. Forests and other habitats are disturbed or destroyed to construct urban areas including the construction of homes, businesses, and roads to accommodate growing populations. Additionally, as populations increase, more land is used for agricultural activities to grow crops and support livestock. This, in turn, can decrease species populations, geographic ranges, and biodiversity, and alter interactions among organisms.
Increasing fishing and hunting, which reduces species populations of the exploited species. Fishing and hunting can also indirectly increase the number of species that are not fished or hunted if more resources become available for the species that remain in the ecosystem.
Explanation:
ddATP, ddTTP, ddCTP, and ddGTP are labeled with red, green, yellow, and blue fluorescent dyes, respectively. A five-base read from a sequencing reaction produced the following color sequence, read by the computer: red, yellow, yellow, green, green. What is the sequence of the template DNA
The sequence of the DNA template is ACCTT. This is because a five-base read from a sequencing reaction produced in the color sequence, read by the computer such as red, yellow, yellow, green, and green.
What do you mean by DNA Template?DNA template may be defined as the strand that is utilized during transcription to construct RNA. It is complementary to the target strand of the DNA.
ddNTPs are labeled with the fluorescent dyes specifically like ddATP is labeled with the red fluorescent dye, ddTTP is labeled with the green fluorescent dye, ddCTP with the yellow, and ddGTP with the blue. The sequence that is synthesized during the sequencing reaction possesses colors like red, yellow, yellow, green, and green.
Therefore, the sequence of the DNA template is ACCTT.
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The statement preganglionic axon terminals release acetylcholine is.
Answer:
The statement preganglionic axon terminals release acetylcholine is true
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Which statement is true of meiosis ?
A. Organisms use meiosis to grow
B. Organisms use meiosis to replace blood cells
C. Organisms use meiosis to repair damaged cells
D. Organisms use meiosis to make reproductive cells
Why was water present as vapour and not liquid?
A: Lower pressure
B: the earth was much hotter than today
C: nobody knows
D: a complex response to the prevailing winds at the time
The sum of all genetic traits in a population’s individuals at any given time:
Answer:
The sum of all genetic traits in a population’s individuals at any given time is called gene pool
Explanation:
edge 22
Please help... ;-;
What would happen if one or more of either of the spring’s structures was not the right shape? Give an example.
Answer:
I think it wouldn’t make what it’s needed for work properly, it could cause it to not fit or work at all.
Explanation:
I hope it helps! Have a great day!
Muffin~
It make what it’s needed for work properly, it could cause it to not fit or work at all.
What is Springs structure?The Spring framework, sometimes known as Spring, has arisen as a response to all of these issues.
This framework eliminates the complexity associated in designing enterprise applications using EJB by leveraging a variety of innovative techniques, including as dependency injection (DI), aspect-oriented programming (AOP), and plain old Java objects (POJO).
Dependable, and scalable enterprise applications can be created by Java EE 7 developers using the open source, lightweight Spring framework. The primary goal of this framework is to offer you a variety of tools for managing your business objects.
Therefore, It make what it’s needed for work properly, it could cause it to not fit or work at all.
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the circumference of a circle is 14p cm. What is the radius of the circle?
Answer:
87.9646 cm.
Explanation:
What is atmospheric perspective? a. the effect produced by rounding objects to appear three-dimensional. b. the effect produced by techniques that make objects appear to go back into the distance, creating a realistic look. c. the effect produced by diffusion of light in the atmosphere whereby more distant objects have less clarity of outline and are lighter in tone. please select the best answer from the choices provided a b c
The Atmospheric perspective is the effect produced by diffusion of light in the atmosphere whereby more distant objects have less clarity of outline and are lighter in tone.
What is atmospheric perspective?Atmospheric perspective refers to a form.of illusional effect and atmosphere produce or reflect on an object. It is also the method use to create the illusion of depth in a painting or drawing work by changing the colour so as to simulate changes effected by the atmosphere on the colours of things seen at a distance.
Therefore, The Atmospheric perspective is the effect produced by diffusion of light in the atmosphere whereby more distant objects have less clarity of outline and are lighter in tone.
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Answer:
Its CExplanation:
How long does it take for a plastic fork to decompose.
Answer:
1,000 years
Explanation:
Single-use utensils can take up at least 1,000 years to decompose.
Answer:
It would take 1000 years
A student set up an experiment to investigate osmosis as shown in Figure 9
The student used visking tubing which is a partially permeable membrane.
The student put 25cm (cubed) of 20% sucrose solution into visking tube 1 and 25cm (cubed) of distilled water into visking tube 2. Both tubes were placed in a 5% sucrose solution and left for 1 hour.
Explain how (will they increase/decrease in size) and why( will water be leaving the potato by
osmosis or moving into the palato by osmosis) tube 1 and tube 2 would look different after one
hour.
The size of tube 1 will eventually rise due to the entry of water. As a result of this, it will swell due to osmosis. While tube 2 would stay the same as the initial size.
What is Osmosis?Osmosis may be defined as the process through which the movement of solute molecules may take place from a lower concentration of solution to a higher concentration of solution through a semipermeable membrane. It is also called the net movement of water across a semipermeable membrane.
According to the context of this question, the actual reason for this increase in the size of the tube is due to osmosis, water will enter tube 1 in order to dilute the sucrose. Due to this, tube 1 may increase in size. But on contrary, the size of tube 2 remains the same because there is no need for dilution of the solution in which it is placed.
Therefore, the size of tube 1 will eventually rise due to the entry of water. As a result of this, it will swell due to osmosis. While tube 2 would stay the same as the initial size.
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(PLEASE HURRY IM TIMED)The leaf shown has a color pattern of green and white
Which part of the leaf most likely produces the most glucose?
1. the green part, because it contains the chlorophyll
2. the white part, because it contains the chlorophyll
3. the green part, because it contains carbon dioxide
4. the white part, because it contains carbon dioxide
One of the most remarkable aspects of the cranium named Irhoud 10 is Group of answer choices the face shape is typical of Homo habilis. the face shape is typical of Homo erectus. it dates to 1.5 million years old. it dates to 315,000 years old.
One of the most remarkable aspects of the cranium named Irhoud 10 is that it dates to 315,000 years old.
What is Irhoud 10?
This is regarded as a fossil which was found in Jebel Irhoud. It is a cranium with a distorted braincase and fragments of the face.
The remarkable aspect is the age of the fossil which dates back to 315,000 years old..
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Which movement of particles would be most affected by a disorder that causes damage to carrier proteins?
osmosis
passive transport
active transport
diffusion
Answer:
osmosis
Explanation:
I'm so sorry if I'm wrong, I'm pretty sure that's it though
The movement of particles that would be most affected by a disorder causing damage to carrier proteins is active transport.
What is active transport?Active transport is a cellular process that requires the use of energy to move particles across a cell membrane against their concentration gradient, from an area of lower concentration to an area of higher concentration. Carrier proteins play a crucial role in active transport by facilitating the movement of specific molecules or ions across the cell membrane. These proteins bind to the particles being transported and undergo conformational changes that allow them to move the particles across the membrane.
If there is damage to the carrier proteins due to a disorder, their ability to bind to and transport particles may be compromised. This impairment can disrupt the active transport process, leading to a decrease or complete loss of the movement of particles against their concentration gradient. Consequently, the normal cellular functions that rely on active transport, such as nutrient uptake, ion regulation, and maintenance of cellular homeostasis, would be significantly affected.
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explaination of osmosis,exosmosis, endosmosis
Answer:
1. OSMOSIS: The movement of water molecules from a region of higher concentration to a region of lower concentration through a selectively- permeable membrane is called Osmosis.
2. EXOSMOSIS: When water moves out of the cell causing the cell to shrink in a hypertonic solution is called Exosmosis.
3. ENDOSMOSIS: When water moves inside the cell causing the cell to swell in a hypotonic solution is called Endosmosis.
Hope this helps. I have underlined the keywords.
Which prokaryotic group is most closely related to eukaryotes?.
conifer trees dominate boreal forests rather than tundra because of
What do u mean by the term inflorescence ?
Thank you
Answer:
some definitions
Explanation:
-the complete flower head of a plant including stems, stalks, bracts, and flowers
-the arrangement of the flowers on a plant
-the process of flowering.
Which part of a cell will identify it as prokaryotic or eukaryotic?.
Comparing prokaryotes and eukaryotes:
The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. which is where the nucleus eukaryotes store their genetic information.
hope this helps :))
Please help me????????!!!!!!!!!!!!!!!!???????!!!!!?????!!!?
Answer: ur mentally unstable if u dont know
Explanation:
L student
The science of naming and grouping organisms is called (genealogy / numismatics / systematics / speciation), and the term (families / taxa / kingdoms / species) describes any of the groups of organisms.
Answer:
The science of naming and grouping organisms is called systematics and the term taxa describes any of the groups of organisms.
Explanation:
Genealogy is the study of families, family history, and the tracing of their lineages. Genealogists use oral interviews, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kinship and pedigrees of its members.
Numismatics is the study of the physical embodiment of various payment media (i.e. currencies). The study of numismatics as it applies to coins is often in the research of the production and use of the coins to determine their rarity.
Systematics, or Taxonomy, is the study of the kinds of organisms of the past and living today, and of the relationships among these organisms. Systematists collect and study the variety of plants and animals and group them according to patterns of variation.
Speciation is an evolutionary process by which a new species comes into being. A species is a group of organisms that can reproduce with one another to produce fertile offspring and is reproductively isolated from other organisms.
taxon - taxa: a taxonomic group of any rank, such as a species, family, or class.
Disease-causing microorganism, such as a bacterium or virus.
(1 Point)
pathogen
antigen
allergen
prion
pathogen
Explanation:
pathogen is a bacterium, virus, or other microorganism that can cause disease.
Answer:
pathogon is bacterium,virus and ...
What is the name of the structures that
are built to recognize specific invaders
and trigger an immune response?
A. antibodies
B. antigens
C. macrophages
Answer:
C
Explanation:
Macrophages is a type of white blood cell. This basically finds out if there is an invader, and stimulates an immune response. Note that, this is not the only function of this structure.
The structures that are built to identify and recognize specific foreign agents and activate the immune system are antibodies, Therefore, option A is correct.
What are antibodies?Antibodies, also known as immunoglobulins, are Y-shaped proteins that are produced by B cells in response to the presence of specific antigens in the body, such as viruses, bacteria, or other foreign substances.
Each antibody molecule is composed of four protein chains, two identical heavy chains, and two identical light chains, that are joined by disulfide bonds. Antibodies are a key component of the adaptive immune system, which is responsible for recognizing and eliminating specific invaders.
Antibodies play a critical role in protecting the body against infections, as well as in the development of vaccines and other immunotherapies. Therefore, option A is correct.
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five ways water is important to you in your daily life.
Answer:
bathing,cooking,washing clothes , cleaning, drinking
Explanation:
How do plants compete with each other?
Answer:
Plants compete with eachother for necessary resources. They compete for nutrients, light, water, space, and pollinators.
Explanation:
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True or False: Trilobites walked among flowering plants
Explanation:
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False ,
Because Trilobites extincted 250 million years ago but the first flowering plant appeared at Cretaceous period.
The vital centers for the control of heart rate, respiration, and blood pressure are located in the a. pons b. medulla c. midbrain d. cerebrum e. none of the these
Brain stem is the part of the human brain that houses the most primitive functions such as the control of heart rate, respiration, and blood pressure.
What is brain stem?It is a part of the brain that is located between the rest of the brain and the spinal cord.
It is responsible for carrying out the most basic nervous system tasks for our survival, such as the regulation and maintenance of the heart rate and the automatic control of respiration.
Therefore, we can conclude that the brain stem is the part of the human brain that houses the most primitive functions such as the control of heart rate, respiration, and blood pressure.
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Which compound is produced when bacteria convert atmospheric nitrogen in the process if nitrogen? fixation?
nitric acid
ammonia
nitrogen gas
phosphorus
In the process of nitrogen fixation, the compound that is produced by bacteria from atmospheric nitrogen is ammonia.
What is nitrogen fixation?This is a chemical and biological process in which bacteria take atmospheric nitrogen (N2) and convert it into different nitrogen-derived substances.
What is the importance of this process?This process is essential for life as it provides plants with nitrogen rich substances they can use as atmospheric nitrogen cannot be taken by plants.
What is the product of this process?There are three main products:
Ammonia (NH3)Nitrates (N02)Nitrites (NO3)Learn more about nitrogen in: https://brainly.com/question/16711904
Answer:
Ammonia
Explanation:
I took the test! :)