Sedentary organisms often experience parapatric speciation because they are restricted to a specific geographic area and do not move around much.
This means that they may be isolated from other populations of the same species and as a result, they can diverge genetically over time. Parapatric speciation occurs when two populations of the same species are geographically adjacent to each other but do not interbreed, leading to the development of distinct traits and characteristics. In sedentary organisms, this can occur due to environmental differences or other factors that cause genetic drift, leading to divergence and eventually, the development of new species.
why sedentary organisms experience parapatric speciation.
Sedentary organisms experience parapatric speciation due to several factors:
1. Limited dispersal: Sedentary organisms, by definition, have limited movement and dispersal capabilities. This leads to the formation of localized populations with limited gene flow, which is a necessary condition for parapatric speciation to occur.
2. Environmental gradients: In parapatric speciation, neighboring populations experience different selection pressures due to environmental gradients. Sedentary organisms are more likely to be affected by these gradients, as they cannot easily move to different areas to escape these pressures.
3. Genetic drift: Limited gene flow between neighboring populations of sedentary organisms can result in genetic drift, which is a random change in allele frequencies. This process, along with selection pressures from environmental gradients, can lead to genetic divergence between populations and eventually, speciation.
4. Adaptation to local conditions: Sedentary organisms must adapt to the specific conditions of their local environment. Over time, these adaptations can lead to the formation of distinct, reproductively isolated populations, promoting parapatric speciation.
In summary, sedentary organisms experience parapatric speciation due to their limited dispersal capabilities, the presence of environmental gradients, genetic drift, and adaptation to local conditions. These factors lead to genetic divergence between neighboring populations and ultimately, the formation of new species.
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What is the process in which homologues align gene by gene in preparation for crossing over?
In synapsis, the genes on the chromatids of the homologous chromosomes are aligned precisely with each other. The synaptonemal complex supports the exchange of chromosomal segments between non-sister homologous chromatids, a process called crossing over.
During meiosis, an event called chromosomal crossing over from time to time occurs as a part of recombination. In this procedure, a place of 1 chromosome is exchanged for the vicinity of every other chromosome, thereby generating precise chromosomal mixtures that divide into haploid daughter cells.
Subsequently, the pairs of homologous chromosomes in anaphase I separate into extraordinary daughter cells. Earlier than the pairs can separate, the crossovers between chromosomes must be resolved and meiosis-unique cohesins need to be launched from the arms of the sister chromatids.
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Which three endocrine glands are affected by hormones from the anterior pituitary?
There re three glands which affected by hormones from the anterior pituitary - Thyroid gland , Adrenal glands, Gonads.
Pituitary gland secrete hormones which control metabolism, growth, sexual maturation, reproduction, blood pressure ,etc. It secretes cortisol hormones ( stress hormones) which affects endocrine glands. And hypothalamus can control the anterior pituitary functions by production peptide hormones which transfer the signal to brain.
Endocrine glands are the organs which makes hormone for the body that are release directly into the blood then it travels through body tissues and reaches the organs of body . Pituitary gland is divided into two parts - anterior and posterior gland .Anterior pituitary is produced several hormones .
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Hall KT, Loscalzo J, Kaptchuk TJ. Genetics and the placebo effect: the placebome. Trends Mol Med 2015;21:285-94.
Placebo responses greatly influence ordinary clinical outcomes, making placebo controls essential in randomized clinical trials (RCTs).
What are the placebome, or genetics, and the placebo effect?
Recent research in neurophysiology reveals the neurotransmitter networks that control placebo effects. It is possible to use genetic screening to identify placebo responders, which would boost the efficiency of RCTs and enhance therapeutic treatment. This is supported by evidence that genetic differences in these pathways can alter placebo effects. Additionally, the design of RCTs should take into account any potential interactions between the molecular pathways of the medicine and the placebo. The placebome, a study of the genetic influences on placebo response, is still in its infancy. Here, we evaluate data from placebo trials and RCTs to pinpoint putative genes in the placebome, look into data for interactions between placebo and drugs, and discuss implications for clinical care and RCTs.
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The cartilage that is located at the end of long bones that closes when growth ceases is called the:_______
The cartilage that is located at the end of long bones that closes when growth ceases is called the Hyaline cartilage. Hyaline cartilage is found in the synovial joints and assists the motion of joints. It is composed of chondrocytes and extracellular matrix. Chondrocytes plays a major role in the organization of extracellular matrix, which is responsible for the biomechanical properties of cartilage tissue. A region of hyaline cartilage remains over the surface of the epiphysis as the articular cartilage and another area of cartilage remains between the epiphysis and diaphysis.
The epiphyseal plate is the area of growth in a long bone. It is a layer of hyaline cartilage where ossification occurs in immature bones. On the epiphyseal side of the epiphyseal plate, cartilage is formed.
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Two factors affect the ability of drugs to destroy organisms in a ____________ community; the drug must be able to penetrate the thick sticky ____________ material surrounding the organisms, and the altered ____________ in biofilm organisms compared to their free-living counterparts must be addressed.
Two factors affect the ability of drugs to destroy organisms in a biofilm community; the drug must be able to penetrate the thick sticky extracellular material surrounding the organisms, and the altered phenotypes in biofilm organisms compared to their free-living counterparts must be addressed.
What are the factors affecting drug action?Factors affecting drug action includes:
Drug dosage: effect of drug increases with increased amount of drug up to the POINT OF RECEPTOR SATURATIONNumber of Receptors: receptors may be differentially expressed in one tissue to the next and, therefore, mediate different levels of biological responses.Disease states: disease states can effect drug pharmacologyDrug Efficacy/Intrinsic activity: ability to activate or block a receptor: maximum effect a drug can produce regardless of the doseDrug Potency/Affinity: rate of drug-receptor binding and drug-receptor release: amount of drug needed to produce a particular effect: drug affinity for receptor.Genetic factorsRoute of administration: The drug injected by IV fluid is more effective.Rate and degree of absorption: The drug which is more absorbed is more effective.Effect of other drugsToleranceTo learn more about Drugs,
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How does a dog fulfill the three points of the cell theory?
Answer:?By stinking up the house
Explanation:Sorry im silly
Melanin Group of answer choices occurs at high rates in individuals with light skin tone. is advantageous because it provides protection from solar radiation. develops more with age. is a chemical that decreases the possibility of a tan.
Melanin is advantageous because it provides protection from solar radiation.
The coloring of the skin and hair is caused by melanin. Additionally, it shields the skin from the sun. The cells known as melanocytes create the pigment melanin. The skin, hair, and eyes are just a few body regions where these cells can be found.Defense against UV radiation. Melanin shields your skin from damaging rays like UVA, UVB, UVC, and blue light by absorbing them.Safety against reactive oxygen species (ROS). The cell processes in your body produce reactive oxygen species as byproducts.In addition to having a higher risk of developing skin cancer, redheads and blondes have less melanin in their skin and hair, which actually intensifies the harmful effects of ultraviolet (UV) radiation.learn more about Melanin here: https://brainly.com/question/11081398
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A body of water with a mountain range in the background. the landform pictured here is most commonly formed at what type of plate boundary?
The landform pictured here is most commonly formed by the convergent boundary.
What is the convergent boundary?A convergent boundary (also known as a destructive boundary) is a section of the Earth's surface where two or more lithospheric plates collide. Subduction is the process through which one plate moves beneath the other. The Wadati-Benioff zone, a plane where many earthquakes occur, defines the subduction zone. These collisions occur on timescales ranging from millions to tens of millions of years and can result in volcanism, earthquakes, orogenesis, lithosphere damage, and deformation. Convergent borders occur between the oceanic and continental lithospheres, as well as the oceanic and continental lithospheres. The geologic features associated with convergent boundaries differ depending on the type of crust.Therefore, the landform pictured here is most commonly formed by the convergent boundary.
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Answer:
Covergent Boundary
Explanation:
Which of the following statements is true regarding a recessive trait that is carried on the X chromosome
Answer:
please present the options given so we can better be of assistance
Explanation:
please give the options so we can better be of assistance.
The theory of endosymbiosis is supported by all but which of these observations?
The exterior arrangement similar to bacterial cell walls is not an evidence in favors of the endosymbiotic theory. Endosymbiotic theory States that organelles such as chloroplasts and mitochondria were once free-living prokaryotes which eventually lived symbiotically within larger cells, forming modern day eukaryotes.
In addition to the lack of histones, mitochondria and chloroplasts have circular, single stranded DNA. Single stranded, circular DNA is found exclusively in prokaryotes. This evidence supports the endosymbiosis theory because these characteristics would allow the mitochondria and chloroplasts to survive on their own. Evidences that support endosymbiotic theory are presence of DNA, size of ribosomes, Inhibition by antibiotics, evolutionary relationship.
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A ____________________ reaction is a severe response to an allergen, also known as anaphylaxis.
Anaphylaxis, also called allergic or anaphylactic shock, is a sudden, severe and life-threatening allergic reaction that involves the whole body. The reaction is marked by constriction of the airways, leading to difficulty breathing.
Anaphylaxis is a severe, whole-body allergic reaction to a chemical that has become an allergen. An allergen is a substance that can cause an allergic reaction.
Anaphylactic shock is a rare but severe allergic reaction that can be deadly if you don't treat it right away. It's most often caused by an allergy to food, insect bites, or certain medications. A shot of a drug called epinephrine is needed immediately.
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a biologist treats a cell with a certain chemical that inhibit the cell ability to synthesise DNA
if this cell is treated to undergo the process of the cell cycle which phase is affected. give two reasons.
If the cell treated with a chemical that inhibits DNA synthesis is treated to undergo the process of the cell cycle, the phase that will be affected is the S-phase of interphase.
What is interphase?The interphase stage of cell division is the resting stage between two successive divisions.
The interphase is further grouped into three phases namely:
G1 phaseS-phase or synthesis phaseG2 phaseThe synthesis phase of interphase is the stage where new DNA strand is synthesized, hence, if the cell treated with a chemical that inhibits DNA synthesis is treated to undergo the process of the cell cycle, the phase that will be affected is the S-phase of interphase.
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Which innate immune system component uses mhc class i molecules directly in its defense strategy?
Natural killer cells are identify as a intracellular infection,especially from viruses, by the altered expression of major histocompatibility class (MHC) I molecule on the surface of infected cells.
Theses cells is a type of white blood cells. They are also called as natural killer . A blood stem cells goes through several stages to became a red blood cells, platelets, or white blood cells.
These Natural killer cells are innate immune cells which shows strong cytologist function against physiologically stressed cells such as tumor and virus infected cells.They are first line of defense against tumor and diverse range of pathogens. Work as a primary defect in human body.
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Rene and Don are discussing the purpose of nutrients. Rene says that nutrients participate in chemical reactions and can change the taste of food. Don says nutrients act as structural materials for cells and provide the body with energy. Who is correct
Answer:
Don
Explanation:
nutrients help energize the body
Plants breathe CO2 and release O2, while animals generally breathe O2 and release CO2. This is an example of an interaction between:
Respiration and photosynthesis are an example of Biosphere and Atmosphere interaction.
The Atmosphere is the gaseous mass or envelope that surrounds the planetary body and is retained by its gravitational field.
The Biosphere is the living and dynamic part of the earth and it constantly responds to the surrounding atmosphere.
The Biosphere interacts with the atmosphere by affecting its physical and chemical properties.
In Photosynthesis, plants breathe CO2 and release O2 while in respiration, animals breathe O2 and release CO2. These interactions alter the gaseous composition of the atmosphere, thereby affecting the chemical properties of the atmosphere.
This interaction can lead to changes in the climate, temperature, etc. Some other examples of the biosphere and atmosphere interactions are mineral cycles, carbon storage, desertification, energy cycle and the water cycle.
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What two types of evolutionary evidence, taken together, provide strong evidence for when extinct species most likely diverged from common ancestors, relative to other events happening on Earth
Answer:
"DNA mutation rate" and "Homologous structures".
Homologous and analogous structures are two types of evolutionary evidence, taken together, provide strong evidence for when extinct species most likely diverged from common ancestors, relative to other events happening on Earth.
Several types of evidence support the theory of evolution: If two or more species share a unique physical feature, such as a complex bone structure or body plan, they can all inherit this property from the common ancestor. Physical traits shared through evolutionary history (common ancestor) they say they are homologous. Not all physical properties that look similar are signs of common ancestry. Some physical similarities instead are analogous: they evolved independently in different organisms because organisms lived in similar environments or experienced similar selective pressures.
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The ______ fishery management approach views the entire ecosystem as relevant to managing a fishery and allows for the diverse societal uses of fish stocks, including fishing, recreation, tourism, and overall ecosystem health.
The ecosystem-based fishery management approach views the entire ecosystem as relevant to managing a fishery and allows for the diverse societal uses of fish stocks, including fishing, recreation, tourism, and overall ecosystem health.
The ecosystem-based management of fisheries is an approach, which projects a holistic outlook towards the management of fisheries in such a way that, humans can benefit from in numerous ways like fishing for food or recreation, or for breeding new stocks of fish. All this is done keeping in mind the angle of environment and biodiversity conservation of the area as well. This approach is extremely essential to keep a check on the effects of human intervention in the ecosystem of the fisheries and how to maintain a stable balance between the two without harming the latter.
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What is the magnification of the ocular and objective lenses used to achieve a magnification of 600X on the virtual microscope?
The magnification of the eyepiece and objective lens used to obtain 600X magnification in the virtual microscope is 6.10.
What are microscope lenses?
Compound microscope lenses are called objective lens and ocular lens. The objective lens is a lens that is installed very close to the object being observed. The ocular lens is very close to the observer's eye.
With this information, we can conclude that 600X magnification in the virtual microscope is 6.10.
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Of the five known human sensory systems, which type of hallucination is the most common?
If menarche does not appear by age 16, or if the normal uterine cycle of an adult woman is disrupted for six months or more, the condition is called_____________.
Answer:
The condition is known as amenorrhea.
Most water is lost daily via the:_______
a. colon.
b. kidneys.
c. lungs.
d. skin.
Answer:
B. Kidneys
How does drinking water affect the kidneys?
Most individuals are aware that our bodies need water to function. Our bodies are actually made up of about 70% water. Water facilitates all bodily processes, whether it be the brain, which directs all bodily movements, the blood, which carries oxygen and nutrients, or even the muscles, which maintain our bones sound and erect. Water is the element that is most essential to human survival, as even our predecessors understood.
Even though they include largely water, other drinks including fruit juice, tea, coffee, and carbonated drinks shouldn't be confused with water. For proper hydration, doctors advise us to consume 13 glasses of water each day. Abdominal discomfort, motion sickness, constipation, diarrhea, and a number of other health problems can result from not drinking enough water. In order to maintain proper body processes, water is essential.
Reasons for drinking water
For your kidneys to effectively remove toxins from your body, you need to drink enough water. Water is necessary for the liver and kidneys to remove poisonous waste from the body. Urine is the bodily waste substance that is expelled from the body.Water facilitates regular bowel motions inside the intestines. Drink enough water to avoid constipation, indigestion, and other digestive issues.Increased water consumption might assist you avoid consuming extra calories. It keeps your hunger in check, makes you feel full, and encourages you to eat just little amounts of food, which helps to maintain a healthy physique. Many diet plans recommend increasing your water intake as a deliberate weight reduction strategy. A body that is properly hydrated can metabolize fats and carbs quickly.Drinking enough water helps to maintain the delicate balance of body fluids. The body's ability to absorb and assimilate nutrients depends heavily on water. Blood is made mostly of water in about 82 percent of cases. Drinking enough water each day contributes to keeping your blood viscosity at the right level.Water makes the skin look fresh and smooth. A hydrated body usually has soft and healthy skin. Dehydration leads to anxiety and nervous tension. It can also impair concentration and lead to mood swings, thus lowering the brain functions. Keeping yourself hydrated boosts memory, keeps you active, increases concentration and improves mood.Water regulates your body temperature by maintaining the fluid levels in the body. It flushes out excess heat from the body in the form of sweat. This helps to maintain proper body temperature.Presence of the phenotype of an autosomal recessive disorder in one generation and then absence of the phenotype in the next generation likely means?
Presence of the phenotype of an autosomal recessive disorder in one generation and then absence of the phenotype in the next generation likely means the alleles are present in heterozygous condition carrying disorder.
A trait, illness, or disease can be passed down through families in a number of different ways, one of which is autosomal recessive. Two allele of a defective gene are required for an autosomal recessive disorder to manifest as a disease or trait. The type of chromosome that is impacted determines whether a person inherits a certain disease, condition, or trait. Sex chromosomes and autosomal chromosomes are the two types.
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The nursing instructor informs the students that which anatomical structure controls the elimination of urine from the body?
The Urinary bladder controls the elimination of urine from the body.
The lower abdomen contains this triangle-shaped, hollow organ. Ligaments that are connected to the pelvic bones and other organs hold it in place. When storing pee, the bladder's walls relax and expand; when emptying urine through the urethra, they contract and flatten. The typical healthy adult bladder has a two to five-hour storage capacity of up to two cups of urine.Three parts of bladder allow urine to be discharged:
A pair of sphincter muscles. By tightly shutting around the bladder opening like a rubber band, these circular muscles assist prevent urine leakage.In the bladder's nerves. When it's time to urinate or empty the bladder, the nerves let the person know.Urethra. Urine can travel through this tube and leave the body. Urine leaks from the bladder as a result of the brain's tightening signal to the bladder muscles.learn more about Urinary bladder here: https://brainly.com/question/21998875
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Two matching chromosomes having the same basic structure and same sequence of genes are called a ______ pair.
Two matching chromosomes having the same basic structure and same sequences of genes are called a Homologous chromosomes ,which is made by same pairs , centro-mere position, and staining pattern, for gene with same corresponding loci.
The same gene present at the same genes at the same loci positions .A homologous chromosomes are the set of one maternal and one paternal chromosome that pair up with each other during cell fertilization.
Its pair are similar to one another and have the same size and shape.Also they carry the same type of genetic information's. If four pair of chromosomes are present called a tetra or bivalent chromosomes.
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The idea that neurons in the visual cortex respond to relatively simple stimuli, then send their axons to higher levels of the visual system where signals from many neurons combine and interact is called:
Hierarchical processing involves the combining of information collected by one unit which is at the lower level.
Hierarchical processing
The hierarchical processing allows small stimuli to be combined and form a larger and more complex stimulus. It was first described by Hubel and Wiesel and since their pioneering work, various other hierarchical models have explained the hierarchical systems in the body. Many models explain the processes that occur from small-scale level to system level.
Various stimuli activate the receptor neurons which send the signals to the neighboring neurons which conduct the signals and so on till it reaches the cerebral cortex. Along the way, the signals from various neurons are combined together and produce a complex signal to which the neurons at this level respond. They send signals to higher neurons where it interacts and combines to form even more complex signals. Such a system allows the individual to see complex shapes, structures, motion, etc.
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Insulin lowers blood glucose levels by Check All That Apply causing skeletal muscle cells to uptake glucose.causing skeletal muscle cells to uptake glucose. causing liver cells to uptake glucose.causing liver cells to uptake glucose. causing glucose to be released in urine.causing glucose to be released in urine.
Insulin lowers blood glucose levels by doing the following:
Causing skeletal muscle cells to uptake glucose Causing liver cells to uptake glucoseWhat is insulin?Insulin is a protein-based hormone that controls the metabolism of glucose in living things' cells.
We digest the food's carbohydrate supply into glucose, the simplest chemical compound. This glucose enters the bloodstream and is used to create energy for respiration.
However, the blood sugar level can be quite high or low, leading to ailments such as diabetes. This is where insulin hormone comes in.
Insulin regulates high blood sugar level by doing the following:
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Carbon tends to share these electrons with ____________ , the elements that comprise a majority of living organisms.
One of the element that comprises the majority of living organisms and tends to share its electrons with carbon is Hydrogen.
What is hydrogen?Hydrogen is an essential organic compound which is present in all living organisms.
Hydrogen can easily share its electrons with other compounds thus making it highly reactive.
Hydrogen combines with oxygen to form water which contributes to about 60% of body weight.
Hydrogen along with carbon and oxygen molecule forms bicarbonate ion which is an essential ion present in the body.
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mitochondria or submitochondrial particles can carry out the following coupled reaction: 2 cyt c (red) 1/2 o2 adp pi -> 2 cyt c (ox) h2o atp
Complex IV, also known as cytochrome c oxidase, oxidizes cytochrome c and transfers the electrons to oxygen, the final electron carrier in aerobic cellular respiration.
What is aerobic cellular respiration?In the presence of oxygen gas, cells undergo cellular respiration, which is how energy from food is produced. The majority of plants, animals, birds, humans, and other mammals all engage in this sort of respiration regularly. As byproducts of this process, water and carbon dioxide are created.
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In order for a eukaryotic or prokaryotic cell to divide, it needs to first duplicate its entire ______, which consists of all of its genetic material.
In order for a eukaryotic or prokaryotic cell to divide, it needs to first duplicate its entire Genome ,which consist of all of its genetic material.
Prokaryotic cell division is termed binary fission.Prokaryotic chromosome is a single DNA molecule that first replicates, then attaches each copy to a different part of the cell membrane.
Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical cells.The first phase to cell division is pro-phase in which the nucleus dissolves and chromosomes migrated.And then finally chromosomes are separated and the cells are physically split into two cells.
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An autoimmune disease could result when Group of answer choices bacteria severely damage the B and T cells of the immune system. cancer creates an imbalance in the immune system. the receptors on cells are not recognized correctly by immune cells. a virus such as HIV destroys the immune system.
An autoimmune disease could result when the receptors on cells are not recognized correctly by immune cells; option C.
What are autoimmune diseases?Autoimmune diseases are diseases which occurs as a result of the body's own immune system recognizing the bod cells and tissues as foreign.
The body's immune system produces produces proteins which are known as autoantibodies which attack and destroy the body tissues and organs.
Autoimmune diseases usually have no cure but can be managed by relieving of the symptoms and by suppressing the immune system.
Some examples of autoimmune diseases include:
Systemic lupus erythematosusMyasthenia gravisPernicious anemia.Reactive arthritis.Rheumatoid arthritis.In conclusion, autoimmune diseases occur when the body's immune system attacks its own body cells, tissues and organs.
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