The given statement "wilderness ecosystems are dynamic, complex, and often fragile, and may be impacted by human use and activities occurring both within and outside wilderness boundaries," is true.
Wilderness ecosystems
The wilderness ecosystem is the ecosystem that has been left undisturbed by humans. There are many areas on the planet that are considered wilderness such as the Great Barrier Reef, the Amazon forest, etc. They are rich in both flora and fauna diversity.
In the United States, a total of 42× [tex]10^{4}[/tex] ha is under the protection of the National Wilderness Prevention System. They are the lands devoted to the protection of the natural ecosystem. Such an arrangement had to be made due to human encroachment and various other factors that affect the wilderness ecosystem. The main threats to the wilderness ecosystem are
Using the land for recreational usesGrazing by livestockForest firePollutionGlobal warmingInvasion of alien speciesThe unnatural flow of water due to diversions, dams, impoundments, etc.Learn more about ecosystems here:
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Acute gastroenteritis that occurs after an incubation period of two to three days, persists for about a week, and commonly affects children is probably caused by_______.
Acute gastroenteritis that occurs after an incubation period of two to three days persists for about a week, and commonly affects children are probably caused by Rotavirus.
Rotavirus is an endemic that causes signs of extreme diarrhea, vomiting, fever, and dehydration. it is without problems spread amongst people. Rotavirus usually causes excessive, watery diarrhea and vomiting in toddlers and young kids. youngsters may become dehydrated and need to be hospitalized.
Rotavirus is most often spread via a fecal-oral direction. that is frequently due to the fact a child does now not wash his or her hands nicely or often enough. it is able to additionally be due to eating or consuming infected meals or water. The virus might also stay on surfaces such as doorknobs, toys, and other hard objects for a long term.
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PLSSS HELP I WILL MARK BRAINLIEST I TRULY NEED HELP IM GONNA FAIL
You are an anthropologist analyzing bone remains from the grave of an ancient female human. Within one of the bones, you find an unusually high concentration of collagen. What does this suggest about the ancient female? (2 points)
She broke a bone and then died before it was fully healed.
She broke a bone and then died a few hours later.
She broke a bone at a very young age, but it fully healed.
She broke a bone at a very young age, but it did not fully heal.
Answer: C
Explanation:
How would you interpret a micrograph that shows a cuboidal cell without a nucleus?
When preparing the slide, the blade did not cut through the nucleus.
Cuboidal epithelial cells have a single, central nucleus and are cube-shaped. They are typically found in glandular tissues all throughout the body in a single layer, such as a simple epithelium, where they manufacture and secrete glandular material.To prepare a slide:
Put a drop of liquid in the middle of the slide to prepare it.Place the sample on the liquid with tweezers.Place one cover slip side against the slide at an angle such that it makes contact with the outer border of the liquid drop.Slowly lower the cover to prevent air bubbles.Utilize the paper towel to absorb any extra water.learn more about slide here: https://brainly.com/question/27127116
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The effect of temperature or nutrition on the expression of genes are examples of how ______ can alter the phenotype.
The effect of temperature or nutrition on the expression of genes are examples of how the environment can alter the phenotype.
Increases in temperature (warm environments) showed a non-significant increase in a phenotypic manner and a marginally significant increase in phenotypic variability. Larger increases in temperature noticed extra increases in phenotypic variability, but no increase inside the mean phenotypic response.
Usually, growing temperature induced an acceleration inside the improvement, and the higher the temperature, the sooner the expression reaction of any particularly focused gene. In more detail, larval yolk utilization and growth rates multiplied, while yolk utilization performance decreased with increasing temperature.
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What tissue type can be found bridging the two halves of the once severed muscle bellies?
Connective tissue is the answer.
A tissue that supports, protects and gives structure to other tissues and organs in the body. Connective tissue also stores fat, helps transport nutrients and other substances between tissues and organs, and helps repair damaged tissue.
There are four classes of connective tissue: blood, bone, cartilage, and auto connective tissue. They are further subclassed and typed: I want you to be able to identify all the different types of connective tissue and learn their position in the body.
Examples of special connective tissues are adipose tissue, cartilage, bone, blood and lymph.
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A large, old tree deep in the forest was knocked down in a windstorm. as it fell, it pushed four other somewhat smaller trees down with it, opening up quite a large patch of sunlight in an area that had been shady for many decades. what is most likely to happen in the sunny patch in terms of plant growth? no plants will be able to grow in it until neighboring trees shade it more. seeds of sun-loving plants will germinate and grow in it. primary succession will start with very small plants or lichens. shade-loving plants will grow in it, since it is in the forest.
Seeds of sun-loving plants will germinate and grow in it.
Gap dynamics in forestsForests generally have different layers of trees. Thus, the ground layer of forests is usually barren or dominated by a few shade-tolerant plant species.
When gaps emerge in an otherwise close canopy either naturally or by other means, the dynamics of plant population on the ground layer change.
If the ground layer is barren before due to shade, propagules of sun-loving plant species will colonize and begin to germinate in the gaps. If the layer has some shade-tolerant herbs before, competition for space starts between the sun-loving and shade-tolerant species.
With time, the shade-tolerant species die off and are replaced by sun-loving plant species.
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Answer: Seeds of sun-loving plants will germinate and grow in it.
Explanation:
pretty simple
more sun= more sun
plants who need more sun will grow more
plants who need more shade wont do as well hence the name
primary sucession has nothing to do with this
no plants will grow isnt true cuz it literally says there is more sun and there is more space
just use process of elimination
The critical element of Mendel's research focus was to use ______ strains that differed with regard to only one gene
The critical element used in Mendel's research was the Pea plant strain that differed in only one gene.
What is meant by a Strain?Within a biological species, a strain is a genetic variety, a subtype, or a culture.
The examples of pea plant strain that only differed by one gene are as follows:
Height of the pea plant ( tall or dwarf)Color of the flower ( white or purple)Types of seeds (round or wrinkled)Learn more about Mendel's experiment with the help of given link:
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Pechloff, K., J. Holch, U. Ferch, M. Schweneker, K. Brunner, M. Kremer, T. Sparwasser, L. Quintanilla-Martinez, U. Zimber-Strobl, B. Streubel, A. Gewies, C. Peschel, and J. Ruland. 2010. The fusion kinase ITK-SYK mimics a T cell receptor signal and drives oncogenesis in conditional mouse models of peripheral T cell lymphoma. J Exp Med 207: 1031-1044.
The given statement that the fusion kinase ITK-SYK mimics a T cell receptor signal and drives oncogenesis in conditional mouse models of peripheral T cell lymphoma holds TRUE.
What are t cells?White blood cells called T-cells collaborate with macrophages. Each T-cell can only combat one particular virus, in contrast to macrophages which may assault any invading cell or virus. This can lead you to believe that macrophages are more powerful than T cells, however this is untrue. T-cells, on the other hand, act more like a special forces unit that only engages in one type of virus attack on your body.
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A moving blood clot is called a(n)
Answer:
A blood.clot is also called a THROMBUS
Part of the brain oversees the postural muscles and control balance and equilibrium?
In brain, cerebellum controls the postural muscles and balance the equilibrium. By operating on the cerebral cortex via the thalamocortical projection and on the brainstem, the cerebellum regulates the cognitive and automatic processes of posture-gait regulation.
Both real-time sensory feedback via the spinocerebellar tract to the cerebellum and feedforward information from the cerebral cortex via the cortico-ponto-cerebellar pathway may play significant roles in these processes.
The cerebellum's ability to govern posture is mostly dependent on sensory afferents. Along with the vestibular nuclei, the floccules and vermis of the cerebellum also receive signals from the labyrinth via the vestibular nerve. Spinocerebellar pathways convey peripheral sensory data and a copy of the spinal cord's output to the fastigial nuclei (FN).
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Zebras and other grazers band together when grazing. which type of behavior is this?
The behavior of zebras and other grazers banding together while grazing indicates their social behavior to protect themselves and their group mates from predators.
Grazing: It is a process in which herbivores roam from one place to another in search of grass, small plants, etc which are the main source of food for them. It involves forage search, selection of forage, and eating the selected forage. Different animals differ in the type and method of searching and eating forage. This different grazing behavior makes them different from one another.
Although, one common thing which is observed in these grazing animals is the practice of grazing in bands or groups. This is generally noticed in the area where they have more danger from predators so they practice this banding method as a protective measure because predators find it difficult to attack groups and they get less chance to kill a lone individual.
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Blood alcohol concentration (bac) is defined as the ration of alcohol in the system to ____________ in the system.
Blood alcohol concentration (bac) is defined as the ration of alcohol in the system to blood in the system.Also called blood alcohol concentration or blood alcohol level . The amount of alcohol which is present in the bloodstream.
A Blood alcohol concentration of 0.05% =0.05grams of Alcohol in every 100 milliliters of blood.It can be measured by breath,blood,or urine tests.High the percentage of alcohol higher the blood alcohol concentration. Levels can range from 0% to over 0.4% (a potentially fatal level).
It is a measurement of alcohol intoxication used for legal or medical purposes.There are some factors also which affects the blood alcohol concentration like - Age ,Tolerance, Metabolism, Medication,body, weight, etc
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How do xenoturbellida relate to hemichordates and nonvertebrate chordates?
The deuterostome group's gene arrangement in the mitochondrial genome of Xenoturbella bocki is remarkably close to that of the chordates and hemichordates and hence to the ancestor deuterostome gene order. Inversion and breakpoint studies particularly point to a similarity to the hemichordates.
Previous morphological investigations imply that Xenoturbella could be classified as a bivalve mollusc, a basal bilaterian, a turbellarian flatworm, a sister group to the echinoderms(nonvertebrate), or a hemichordate. Recent genetic analyses that focus mostly on nuclear genes appear to favour the Ambulacraria (echinoderms + hemichordates). In contrast, a basal deuterostome location is supported by mitochondrial sequences.
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Apply darwin’s four postulates to the galápagos finch case study to verify that natural selection has occurred.
Darwin's observed the Galapagos finches has graded series of break size and shape ,predicted that species were modified from one original mainland species.
He observes that beak shape varies among finch species that beak of an ancestral species had adapted over time to equip the finches to acquire different food sources. His main purpose for asking evolutionary questions about adaptation and the multiplication of species.
Finches beak shapes that corresponded to the main food source on that island, many branches of science are contributed in Darwin's theory of natural selection. This is important because isolated group of birds have evolved to match their niche diets and its a clue for Charles Darwin in his theory.
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Secondary lymphoid organs, such as the lymph nodes, spleen, and mucosa-associated lymphoid tissues, each have distinct features that are important for their role in initiating immune responses focused on different anatomical compartments (i.e., the peripheral tissues, the blood, or the gastrointestinal tract, respectively). Yet these organs share some overall structural features, such as distinct
One major difference between these secondary lymphoid organs is the mechanism by which antigens or pathogens enter the organ.
Naive T cells can develop into effector and memory T cells, which remove the triggering antigen in peripheral tissues and produce protective immunity, with the help of secondary lymphoid tissues.
The spleen, which collects bloodborne antigens, the lymph nodes, which deal with antigens found in peripheral tissues, and the mucosa-associated, bronchial-associated, and gut-associated lymphoid tissues where antigens from epithelial surfaces are collected are examples of secondary lymphoid organs.
Therefore, One major difference between these secondary lymphoid organs is the mechanism by which antigens or pathogens enter the organ.
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PLS HELPPP WILL MARK BRAINLIEST IM DESPARETE
The patella is a(n) _____________bone found in the ___________________. (2 points)
long; appendicular skeleton
irregular; appendicular skeleton
flat; axial skeleton
short; axial skeleton
Answer:
(b) irregular, appendicular
Explanation:
You want to know the shape and location of the patella in the human skeleton.
PatellaThe patella is also known as the kneecap. It is a smallish irregularly-shaped bone that is part of the leg.
Appendicular skeletonThe appendicular skeleton includes the limbs, the shoulder girdle, and pelvis. As the patella is part of each lower limb, it is included in the appendicular skeleton.
The patella is an irregular bone found in the appendicular skeleton.
im in need of help someone someone help me with the question in the picture
Moonlight is sunlight reflected. A star of our Sun's size is typical. The galaxy that houses our Solar System is called the Milky Way.
In the Milky Way Galaxy, which has hundreds of billions of stars, our Sun is but one common star. Electromagnetic radiation from the sun, both visible and invisible, includes heat. Due to the moon's low degree of reflection, very little of the incident "light" that hit the moon is reflected back to the earth. Because we refer to anything connected to our star by the adjective "solar," which comes from the Latin word "solis," our planetary system is known as "the solar system." Our solar system is situated in the Milky Way galaxy's outer spiral arm.
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Scientific name of
Raw fish?
Answer:
The scientific name is Pellona sardinão.
Explanation:
Hope this helps!
If not, I am sorry.
Increased secretion by all the salivary glands results from:
Answer:
Parasympathetic and Sympathetic branches of the autonomic nervous system
What are the correct molar coefficients for balancing the following chemical reaction?
(NH4)3PO4 +
HCI →
NH4Cl +
H3PO4
The correct molar coefficients will be 1, 3, 3, and 1 respectively.
Balancing chemical equationsA balanced chemical equation is an equation that obeys the law of conservation of atoms.
In other words, the number of atoms of the elements in the reactants must be equal to the number of atoms of the same elements in the products.
Hence in the reaction with the chemical equation: [tex](NH_4)_3PO_4 +HCI --- > NH_4Cl +H_3PO_4[/tex]
The number of atoms of N, H, P, O, and Cl in the reactants must be the same as in the products.
Thus, the balanced equation of the reaction, in this case, will be:
[tex](NH_4)_3PO_4 +3HCI --- > 3NH_4Cl +H_3PO_4[/tex]
Therefore, the correct molar coefficients for balancing the equation are 1, 3, 3, and 1 respectively.
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the researchers chose to determine co-culture all samples in the presence of interleukin-5 a cytokine. what is the most likely reason for this decision
Interleukin-5 can both promote the growth of B cells and eosinophils which are cleared when not exposed to IL-5.
What is Interleukin-5?Interleukin-5 (IL-5) is a cytokine that induces the growth of different immune cells including B cells and eosinophils.
In consequence, in this case. it is expected to observe the outcome (immune response) of immune cells in the presence of IL-5.
In conclusion, Interleukin-5 can both promote the growth of B cells and eosinophils which are cleared when not exposed to IL-5.
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Which amino acid and which atom has most to do with myoglobin’s ability to bind o2?.
Which pattern of inheritance would explain the different fur color in the related dogs?
Answer:
B/b alleles.
from a presentation
Children in northern regions experience months of inadequate sunlight exposure on the skin. to prevent possible abnormal bone development, what essential organic nutrient is necessary in the diet?
Children in northern regions experience months of inadequate sunlight exposure on the skin. to prevent possible abnormal bone development, cholecalciferol is an essential organic nutrient is necessary in the diet.
In some foods and as a dietary supplement, cholecalciferol, sometimes referred to as vitamin D3 and cholecalciferol, is a form of vitamin D that is produced by the skin when it is exposed to sunlight.People who reside in subpolar and polar regions need more vitamin D. Long winter nights cause less sun exposure, which explains why.Inuit bodies have adapted to the cold, a diet high in meat, and a low UVB environment where vitamin D production in the skin is difficult.The majority of people who live in northern latitudes require vitamin D during the winter to maintain adequate amounts of circulating 25(OH)D3 for maintaining good body function and preventing illnesses.learn more about cholecalciferol here: https://brainly.com/question/4551554
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The end products of digestion of carbohydrates are ________
Answer:
glucose, fructose and/or galactose
As we age, the decrease of which hormone is associated with the loss of muscle tissue?
The decrease of human growth hormone is associated with the loss of muscle tissue as we age.
What is a hormone?A hormone is a chemical messenger that is released into the bloodstream in order to carry out particular physiological functions.
The human growth hormone is a hormone required during the growth that induces cell division during specific stages of human development.
The human growth hormone is secreted by specialized cells present in the anterior pituitary gland.
The expression level of the gene encoding the human growth hormone can be used in clinical settings in order to determine the presence of abnormal growth during embryo development.
In conclusion, the decrease of human growth hormone is associated with the loss of muscle tissue as we age.
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If you suspect your culture of bacteria has 23 x 106 cells per mL, what would you want the final dilution to be in order to end up with 96 colonies of bacteria on a petri dish
The dilution factor in order to end up with 96 colonies of bacteria is 0.23 × [tex]10^6[/tex] .
For calculating the colony forming unit bacteria;
Colony-forming unit (CFU or cfu) is a measurement of live bacterial or fungi cells and is used to calculate the colony-forming unit of bacteria. CFU counts only viable cells as opposed to direct microscopic counts, which count all cells, both living and dead, using a hemocytometer. Colony-forming units per milliliter (CFU/mL) for liquids and colony-forming units per gram (CFU/g) for solids are used to indicate the results for convenience. The miles and Misra method can be used to compute CFU, which is helpful for assessing the microbiological load and severity of illness in blood and other samples.
∴ cfu/ml = (no. of colonies x dilution factor) / volume of culture plate
23 x [tex]10^6[/tex] cells per mL = 96 × dilution factor
Dilution factor = 23 ×[tex]10^6[/tex] / 96
Dilution factor = 0.23 × [tex]10^6[/tex]
Therefore, the dilution factor in order to end up with 96 colonies of bacteria is 0.23 × [tex]10^6[/tex] .
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Identify interactions among species, such as competition or predation.
Among the different types of species interactions, we can mention amensalism, commensalism, parasitism, mutualism, competition, and predation.
What are the possible interactions among species?
All organisms in nature interact with other organisms in different ways.
AmensalismRefers to a biological relationship established between two organisms, in which one of them avoids the growth, development, or survival of the other one.
In this interaction, one of the organisms seems to be strongly affected by the other one. Meanwhile, the other organism does not seem to be affected at all.
CommensalismIn this case, the fitness of only one of the species seems to increase, while the other species is not affected at all, nor positively or negatively.
The unaffected species might provide food or refuge to the other species, which is beneficiated.
ParasitismIn this case, one of the species is beneficiated, while the other suffers a consequence, reducing its fitness.
These interactions are mainly about nutrition, although there might be other benefits too.
Some parasite species might coexist with their host, while some others might get them ill to the point of causing death.
MutualismThe interaction is favorable for both species.
Their fitness increases with these interactions, although they do not need this relationship to survive.
The degree of benefits might vary among species or might be equal.
CompetitionThis is an ecological and evolutive process very common in nature.
Competition might be intra- or interspecific. Competition between different species in a community or ecosystem might be due to the same resource use.
Resources are the same food, territory, shelter, etcetera. When a resource is useful for two or more species, and limited, they compete to gain it.
One of the species is more competitive, so it is favored over the other species.
PredationIt refers to the interaction in which one species attacks, kills, and feeds on other species.
This definition excludes the detritivorous organisms, because in these last cases the organic matter is already dead.
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You are microscopic and stranded inside the right atrium during passive ventricular filling. How many potential escape routes do you have (assume you can swim with and against the current):
4 potential escape routes you have inside the right atrium during passive ventricular filling.
What Is the Pathway of Blood Through the Heart?There are four chambers in the human heart.
Mammals and birds have double circulation.
The pathway of blood through the heart is as follows:
The deoxygenated blood from the body is received in the right atrium from the vena cava and enters the right ventricle through a tricuspid valve. It enters the pulmonary artery through the semilunar valve and goes to pulmonary circulation.The oxygenated blood from the lungs is received in the left atrium from the pulmonary veins and enters the left ventricle through the bicuspid valve. It enters the aorta through a semilunar valve and goes to the systemic circulation.To learn more about the blood circulation,
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Along with other distinct traits, robust australopithecines had large __________ adapted for grinding food. Group of answer choices temporalis muscles and a sagittal crest front teeth and small back teeth premolars, molars, temporalis muscles, and a sagittal crest premolars and molars
Along with other distinct traits, robust australopithecines had large temporalis muscles and a sagittal crest, and large premolars and molars adapted for grinding food.
Robust australopithecines belong to the Australopithecus genus, they are known as robust because of their dietary adaptations that allowed them to eat hard and fibrous food that needs vigorous chewing and grinding.
They were adapted to eat seeds, nuts, plant roots, tubers, etc. They had large temporalis muscle (major muscle for chewing) and a large sagittal crest for attachment of temporalis muscle to the skull for chewing hard and fibrous foods.
They also had large premolars and molars to aid in chewing tough plant materials like roots and tubers.
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