Answer: The increasing population pressures and overgrazing in the Sahel have resulted in a significant environmental change. The once lush and green land has transformed into a barren and desert-like landscape. The soil has been depleted of its nutrients, making it difficult for plants to grow. This has had a devastating impact on the local wildlife and the people who depend on the land for their livelihoods. The lack of vegetation has also led to increased erosion and soil degradation, making it even more challenging to grow crops. Overall, the environmental change in the Sahel is a stark reminder of the importance of sustainable land use practices and the need for effective policies to protect our planet's natural resources.
Explanation:
When a rod-shaped bacterium is short and plump it is called a(n):________ and if it is gently curved it is called a(n):________
When a rod-shaped bacterium is short and plump it is called a: coccobacillus and if it is gently curved it is called a: vibrio.
Bacteria display a huge variety in shape, size, as well as arrangement of colonies. The three common shapes seen in bacteria are:-
Coccus: It is used to describe bacterial cells that are spherical or round in shape. They can be perfect spheres or oval or bean-shaped.Bacillus: It is used to describe a bacterial cell which is cylindrical or rod-shaped. However, a rod which is short and plump is called a coccobacillus ,whereas it is termed as a vibrio if it is gently curved.Spirillum: It is used to refer to a bacterial cell possessing the shape of a spiral cylinder.To learn more about Bacteria here
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Genes linked on the same chromosome tend to be inherited together, violating the principle of independent assortment.
What is the effect of crossing over?The relative position of genes is determined by calculating the frequency of crossing-overs between genes located on the same chromosome. The closer two genes are located to each other on a chromosome, the lower is the probability that the independent distribution in the next generation violates the principle of the opposite chromosomes.
Crossing-over between them is highly likely, resulting in the formation of recombinant chromosomes. The phenotype resulting from a genotype is determined by the same distribution.
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Reproduction is not a life process still organisms spend a lot of energy on it. Give reason.
Answer:
Reproduction is not a life process, but still organisms spend a lot of energy on it. ... The reproduction is not necessary to ensure living but it is required to ensure that the continuation of the living organisms and generations of the next cycle of living. It is necessary for ensuring the stability of the population.
Reproduction also helps in increasing the population of the species. All the processes which are necessary to maintain life in an organism are called life processes. Reproduction is not considered a life process because it is not necessary to maintain life.
What is a molecule in your own words?
Answer:
A molecule is two or more atoms bonded together to form a single chemical entity.
Where do you find the x axis
Answer:
An x-axis is one of the axes of a two- or three-dimensional graph. The x-axis is the horizontal plane of a graph in a Cartesian coordinate system, which gives a numerical value to each point along the horizontal x-axis, as well as the vertical y-axis (in a two-dimensional graph).
Explanation:
X-axis is the line where the values of y-coordinate are zero for all the values of x. Then the data points for the x-axis are: (1,0), (-1.5, 0) Therefore the equation of the x-axis is y = 0, and its graph on the x and y graph chart is shown below.
Answer:
A coordinate grid has two perpendicular lines, or axes (pronounced AX-eez), labeled just like number lines. The horizontal axis is usually called the x-axis. The vertical axis is usually called the y-axis. The point where the x- and y-axis intersect is called the origin.
Explanation:
why the circulatory system is considered to be a closed system?
Explanation:
human have closed circulatory system. this means blood is always enclosed in the vessels and the heart while circulating throughout the body IN this type of system blood is pumped by heart through arteries and veins and does not fill the body cavities thats why the circulatory system is considered to be a closed system
anti-m was detected in a 27-year old man before surgery. units negative for m antigen were not available; however, the units were approved for transfusion when major crossmatch using m n donor cells and patient serum resulted in:
Units negative for m antigen were not available; however, the units were approved for transfusion when a major crossmatch using m n donor cells and patient serum resulted in no agglutination.
The presence of anti-M antibodies in the patient's serum and a negative major crossmatch result using M antigen-negative donor cells support the researcher's argument that the units were approved for transfusion despite the presence of anti-M antibodies in the patient's serum.
The lack of agglutination in the major crossmatch indicates that the patient's antibodies are unlikely to react with the M antigen on the donor cells, reducing the risk of transfusion reaction.
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an animal can wound a tree by scratching away the bark. the tree can respond to the wound in many ways. the sap quickly covers the wound, and then the tree covers the wound with new growth. the diagram shows the cross section of a tree with a healed wound. what process worked most directly with a transport section to heal the wound?
Cellular reproduction is the process which worked most directly with a transport section to heal the wound.
What is Cellular reproduction?
This involves producing a copy of preexisting cells through the process of cell division known as mitosis.
The plant when injured yields multiple cells which covers it up and helps in the healing process.
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A biologist studying alpine wildflowers notices that two populations of similar species are able to occupy the same niches. However, species A is mostly found at lower altitudes, while species B is mostly found at higher altitudes. What has most likely caused the realized niches of these two wildflower populations to be smaller than their fundamental niches?
A.
Species B requires fewer resources than species A.
B.
The species are involved in a mutualistic relationship.
C.
Species A is capable of growing faster than species B.
D.
Competition has restricted the ranges of both species.
D is the right response. The ranges of both species have been constrained by competition. Competition arises when two or more organisms try to fill the same niche and leads to one species outperforming the other. In this instance, despite being confined to various heights, species A and B share the same niche.
This indicates that competition has reduced both species' ranges, resulting in smaller realised niches than their basic niches. The other choices are unsatisfactory because they do not address the issue of why the realised niches of species A and B are smaller than their basic niches.
For instance, the fact that species B needs fewer resources than species A may help to explain why species B is able to live at greater elevations, but it does not necessarily do so.
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one species of monkeyflower attracts using with non-red colors and a landing pad, while another species attracts hummingbirds with lots of nectar and red flowers; bees and hummingbirds faithfully visit their flower preference. the two species rarely interbreed. what type of isolating barrier is this?
The isolating barrier in this scenario is known as a reproductive isolation barrier, specifically behavioral isolation.
This is because the two species of monkeyflower have different mating behaviors and preferences, which prevents them from interbreeding and producing viable offspring. One species has evolved to attract bees with non-red colors and a landing pad, while the other has evolved to attract hummingbirds with lots of nectar and red flowers.
As a result, the bees and hummingbirds consistently visit their respective flower preferences and do not cross-pollinate between the two species. This behavioral isolation mechanism contributes to the development of genetic divergence between the two species, which can ultimately lead to speciation.
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Consider what you know about biotic and abiotic factors in an ecosystem. What is one of the reasons that nutrients in a vegetable patch might be considered abiotic?
Answer:
Nutrients can come from dead plants that have decomposed. Available nutrients affect the carrying capacity of garden plants. Nutrients are mostly obtained from the soil.
One of the reasons that nutrients in a vegetable patch might be considered abiotic is:
The nutrients are gotten from the soil and they are decomposeAccording to the given question, we need to give one reason why the nutrients in a vegetable patch can be considered an abiotic factor.
As a result of this, we can see that the nutrients in a vegetable patch can be considered as an abiotic factor because they are already decomposed.
An abiotic factor in an ecosystem is any non living thing which has a direct (or indirect) impact on the living things in an ecosystem.
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Afish swims through industrial pollution and acquires a thin layer of magneslum fluoride on its scales approximately 0.5 jum thick. Deep sea creatures are very sensitive to blue light (455 nm), but have trouble seeing other wavelengths. Will other deep sea creatures be able to see the fish? (Note: Use π _fukseace is very large, π _magnaisar fileride =1.38, and n_water =1.333.)
To determine if other deep-sea creatures will be able to see the fish with its thin layer of magnesium fluoride, we need to consider the phenomenon of thin-film interference.
In this case, the fish has a thin layer of magnesium fluoride on its scales, which acts as a thin film. The thickness of the film is given as 0.5 μm (micrometers). The refractive index of magnesium fluoride is 1.38.
To determine if the fish will be visible to deep-sea creatures, we need to check if there is constructive interference for the blue light wavelength of 455 nm (nanometers). The condition for constructive interference is given by the equation:\(2 * n * d * cos(θ) = m * λ\)Where: n is the refractive index of the medium above the film (air or water), d is the thickness of the film, θ is the angle of incidence, m is the order of the interference (m = 0, 1, 2, ...), and λ is the wavelength of light.Assuming the incident angle is zero degrees (normal incidence) and using the given values, we can calculate the mth order of interference for the blue light wavelength.
\(2 * 1.333 * 0.5 = m * 455 nm\)
\(1.333= m * 0.455 μm\)
\(m=2.93\)
Since m is not an integer value, there is no constructive interference for the blue light wavelength.
Therefore, it is likely that other deep-sea creatures will not be able to see the fish due to the limited visibility of wavelengths other than blue light in their environment.
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The data table below includes the estimated populations of woolly monkeys and
long-horned grasshoppers in a small area of the Amazon. The data includes
numbers from both before and after a fungus harmed the health of the long-
horned grasshoppers.
Answer:
vggg
Explanation:
Which of the following best explains why a cell's plasma membrane is composed of two layers of phospholipids rather than just a single layer?
Answer: The hydrophilic tails are directed inward and the hydrophobic heads are directed outwards.
Explanation:
A phospholipid is made up of two ends a hydrophilic or water-loving end that is phosphate head and a hydrophobic tail that is made up of fatty acid tail. The arrangement of phospholipid in a bilayer structure allows the entry of oxygen, carbon dioxide, and lipids to pass through them via concentration gradient via simple diffusion.
Lipids are amphipathic molecules that compose the membrane. Membrane lipidic bilayers allow only the hydrophilic heads to interact with water inside and outside the cell, while hydrophobic tails remain in the interlayer space, away from water.
----------------------------------------------
Two lipidic layers compose the cell membrane. There are also proteins and glucans incrusted in between.
Since lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails, they need to form two opposite layers.
Lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells in contact with water. Meanwhile, their hydrophobic tails are against each other, constituting the internal part of the membrane.
Membranes are fluid, meaning that lipids and proteins composing them can move laterally, transversally, or rotationally.
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I thought benzoic acid was obtained from styrax benzoin since gum benzoin is obtained from it. any help here please.
Answer:
Yes you are right
Explanation:
hope it helps
1. The graph below shows rate of reaction data for 2 different enzymes. One of these enzymes are found in the stomach, the other is found in the mouth.a) Which of these lines is more likely to indicate the enzyme found in the stomach? Explain.b) Both these enzymes have the same optimum pH, TRUE or FALSE?2. Explain, in terms of bonding, why the rate of reaction gradually falls once the pH increases above the optimum rather than denaturing straight away.
Answer: Solid graph
Explanation: This indicates an optimum temperature for human enzyme. Pepsin is a stomach enzyme that serves to digest proteins found in ingested food. Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen. Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach.
answer seriously.
any foolisness under this will get charged
Answer:
I dont know what D is because I can barely see. So i dont know if these are 100% right
Explanation:
A-Glycolipid
B- Nonpolar
C-Polar
D-
E- Integral protein
F-Phospholipid bilayer
What do you call the process in which yeast reproduce by forming a daughter cell that is genetically identical but initially smaller in size
The process in which yeast reproduce by forming a daughter cell that is genetically identical but initially smaller in size is called budding.
In yeast, the asexual reproduction process known as budding causes a tiny, genetically identical daughter cell to sprout or "bud" from the parent cell.
The parent yeast cell goes through a number of changes during budding. The parent cell's surface develops a tiny protrusion, or bud, which gradually enlarges.
The parent cell provides nourishment and genetic material to the bud as it grows.
When the bud reaches a particular size, it separates from the parent cell and develops into a separate yeast cell.
The freshly produced daughter cell inherits the same genetic material as the parent cell, making them genetically similar.
Thus, it starts out smaller and grows and develops more to reach the size that it does.
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A scientist tests the effectiveness of a medicine. The medicine is administered to 2,500 volunteers who discontinue all other treatments. What is wrong with this experimental design?
A. The experiment should include fewer volunteers.
B. The experiment should be administered in random dosages.
C. The experiment should include a group that does not take the medicine.
D. The experiment should allow the volunteers to continue other treatments.
Answer: D is the Answer
Explanation: the experiments should let the volunteers continue other treatments.
what happens if something in the scientific process doesn't go as planned
Answer:
You take observations and record it in your data. And state that your hypothesis was wrong
A student is using the Kirby-Bauer procedure to test if a bacterial organism is resistant or sensitive to the two antibiotics, X and Y. A zone of inhibition was only observed around the antibiotic Y. This means that ...
This result indicates that the bacterial organism is resistant to antibiotic X, and sensitive to antibiotic Y. The Kirby-Bauer procedure involves streaking organisms onto an agar plate that has been pre-inoculated with the two antibiotics.
A zone of inhibition forms in the area of the plate where the antibiotic has killed off the organisms. If no zone of inhibition is observed, then the organism is resistant to the antibiotic. In this case, no zone of inhibition was observed around antibiotic X, indicating that the organism is resistant to it. However, a zone of inhibition was observed around antibiotic Y, indicating that the organism is sensitive to it.
This suggests that the organism may be more likely to respond to treatments with antibiotic Y rather than antibiotic X. It is important, however, to note that this result is only an indicator of bacterial sensitivity, and does not guarantee a successful treatment. Further tests should be conducted to confirm the results.
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In order for medicine X to produce the effects that the researchers observed, it must have entered into which part of the targeted cells?
Golgi apparatus
nucleus
rough endoplasmic reticulum
ribosomes
Answer:
Nucleus
Explanation:
Answer:
In order for medicine X to produce the effects that the researchers observed, it would most likely need to enter the nucleus of the targeted cells. The nucleus is where genetic material, such as DNA, is stored and where gene expression is regulated. Depending on the specific mechanism of action of medicine X, it may need to interact with or affect gene expression in some way in order to produce its observed effects. While the other organelles listed (Golgi apparatus, rough endoplasmic reticulum, and ribosomes) are important for various cellular functions, they are less likely to be directly involved in the mechanism of action of a medicine.
The theater sold 562 tickets to the concert at a price of $6 each. Use the distributive property to find the product of 6 × 562. 6(562) = 6(500) + (60)(2) = 3,120
Answer:
1,897,087=1,900,207.2=3,120 (the equasion you gave when distributed)
Answer to the question(Money made): ($)3,372
Explanation:
solved it out by multiplying
Answer:
Answer to the question(Money made): ($)3,372
Explanation:
What molecule does the carbon from carbon dioxide get stored as in photosynthesis?
During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.
in what ways do the parts of a human body system work together to carry out a specific function
The human body is a complex network of systems that work together to maintain the body's functions and sustain life.
Each system has specific functions and is composed of different organs and tissues that work in harmony to achieve a common goal.
For example, the digestive system is responsible for breaking down food into nutrients that the body can use for energy. It consists of organs such as the mouth, esophagus, stomach, small and large intestines, liver, pancreas, and gallbladder, all of which work together to digest food, absorb nutrients, and eliminate waste.
Similarly, the respiratory system includes organs such as the lungs, trachea, bronchi, and diaphragm, which work together to exchange oxygen and carbon dioxide between the body and the environment. The cardiovascular system includes the heart, blood vessels, and blood, which work together to transport nutrients, oxygen, and waste products throughout the body.
All these systems work together to maintain homeostasis in the body, which is the balance of internal conditions necessary for optimal functioning. When one system fails, it can have a ripple effect on other systems and compromise the body's overall health. Understanding how each system functions and works together is crucial for maintaining good health and preventing disease.
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The theory of evolution states that organisms come from where?
Answer:
I think it is from a common ancestor, but I am not sure
Explanation:
Answer:
Darwin said that all species may have come form some sort of “primordial form”
Explanation:
how are experiment anf models similar?
Answer:
experiments are versions of the real world captured within an artificial laboratory environment, models are artificial worlds built to represent the real world. i aint gonna cap i copied of google :
The volcanoes can be seen on the topographic map as tall peeks. How many volcanic peaks higher
than 7000 feet can be seen on this map.
Answer: 2
Explanation:
Each line represents an increase in height of 1000ft.
And the volcano peaks are the circles with no other concentric lines inside (meaning that does not grow anymore, so it is the peak).
We can see that the peak of the top volcano has 13 lines, so it is around 13,000 ft high.
The bottom volcano has also 13 lines, so it is also around 13,000 ft high, then in the image we can see two volcanos higher than 7000ft.
Smooth muscles is found in________ such as_______.
Answer:
walls of hollow visceral organs, such as liver.
Explanation:
Answer:
Smooth muscles are found in organ systems such as
1. Gastrointestinal tract.
2. Cardiovascular: Blood vessel and lymphatic vessels.
3. Renal: Urinary bladder.
4. Genital: Male and female reproductive tracts.
5. Respiratory tract etc (almost every organ system)
Which phrases apply to metamorphic rocks? Check all that apply.
1. form under extreme heat and pressure
2. form from existing rocks
3. form from magma and lava
4. form when sediments combine
5. form from volcanic eruptions
When pre-existing rocks are altered by heat, pressure, or reactive fluids like hot, mineral-rich water, the resulting rocks are known as metamorphic rocks. Thus, option A,B is correct.
What are the characteristics of metamorphic rocks?Metamorphic rocks are produced when rocks are subjected to conditions such as high pressures, high temperatures, hot fluids rich in minerals, or, more usually, some combination of these.
The most prevalent elements in the Earth's crust, silicon and oxygen, are found in the majority of the minerals that make up rocks. One of the most common sedimentary rocks is limestone.
Therefore, extreme heat and pressure and existing rocks are the characteristics of metamorphic rocks.
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