E) Natural selection requires genetic variation, that forms a descent with modification or new characteristics, and involves differential reproductive success.
In general ,Natural selection is considered as the process through which organisms develop variation in traits, which make them more fit to survive in changing environment survival. Thus , Natural selection primely depends on the environments. Natural selection doesn't depend on the traits that are genetically superior natural trait but they acts on existing heritable variation . These Heritable variation comes from random mutations.
Hence , we can say that Development of genetically modified organisms is of artificial selection but natural selection come over years of adaptation.
Hence, E is correct option
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Antibiotic X is made naturally by the bacterium Bacillus subtilis and is primarily only used to target skin infections caused by a select number of Gram positive bacteria. This type of chemotherapeutic drug would best be characterized as a(n):
Chemotherapeutic drug would best be characterized as a Narrow-spectrum antibiotic.
What is a narrow spectrum antibiotic?A limited number of bacterial species can be killed or inhibited by a narrow-spectrum antibiotic. Fidaxomicin and sarecycline are two examples of narrow-spectrum antibiotics. Narrow spectrum antibiotics are active against a selected group of bacterial types. They can act on either gram +ve or gram –ve but not both.
Only undesirable bacteria species may be killed or inhibited by a narrow-spectrum antibiotic (i.e. causing disease). As a result, it largely ignores the beneficial bacteria, reducing any unintended consequences on the microbiota. Low likelihood of bacterial resistance emerging.
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Which method offers the most reliable way of assessing whether athletic performance is boosted by drinking soda with caffeine in it?
The Kruskal-Wallis test was used to determine changes in the development of the urine caffeine content within each sport. Due to the non-normal distribution of the urine caffeine levels, non-parametric statistics were later used. Crosstab and Chi-Square tests, along with adjusted normalised residuals, were used to examine the variations in sample distribution among ranges of urine caffeine content.
One amongst the most popular drugs used by athletes to improve their performance in competition is caffeine (1,3,7-trimethylxanthine).
Evidence suggests that a variety of administration methods, including capsules/tablets, caffeinated drinks (such as energy drinks and sports drinks), liquids (such as coffee), and chewing gum, can be used to receive caffeine performance-enhancing characteristics.
However, due to the widespread availability of these goods on the market, caffeinated beverages have taken over as the primary method of caffeine administration in sports.
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Answer the question as a CER (Claim, Evidence, Reason.)
Question: Which animal or plant should be protected from hunting or gathering in order to keep the healthiest ecosystem?
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Key stone species should be protected from hunting or gathering in order to keep the healthiest ecosystem. One illustration of a keystone species in North America is the American Beaver (Castor canadensis).
Claim: Some species are essential to the survival of the other species in the ecosystem in every environment.
Reason: A large predator or a little plant could be the keystone species, but without them the ecosystem might not exist. If a keystone species vanished, some ecosystems might not be able to adjust to environmental changes.
Evidence: Often, it takes the extinction of a keystone species for the importance of that species in an ecosystem to be fully understood. Robert Paine, an ecologist who popularised the phrase "keystone species" in the 1960s, discovered the significance of such species while researching starfish along Washington state's rugged Pacific coast.
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A youthful appearing patron presents an expired id and wants to purchase alcohol. based on best practices, what should the server do?
The server should politely tell him that he can not be served alcohol.
What should the server do?Alcohol is known to be able to affect both the mood and the psyche of the person that is consuming it. As such, care needs to be take regarding the individuals that have access to alcohol.
If the server is confronted with youthful appearing patron presents an expired id and wants to purchase alcohol, the server should politely tell him that he can not be served alcohol.
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Axons of the spinal nerve that innervate the ventrolateral body surface, structures of the body wall, and limbs make up the
Axons of the spinal nerve that innervate the ventrolateral body surface, structures of the body wall, and limbs make up the Ventral ramus.
The anterior portion of a spinal nerve is known as the ventral ramus. Shortly after a spinal nerve exits the intervertebral foramen, it branches into the dorsal ramus, the ventral ramus, and the ramus communicans. These contain information that is both sensory and motor.
The sensory and motor fibres that innervate the muscles, joints, and skin of the lateral and ventral body walls as well as the extremities are carried by the spinal nerves' ventral ramus. They continue to be separate from one another throughout the thoracic region and each innervates a small section of muscle and skin along the sides, chest, ribs, and abdominal wall.
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The right atrium is the receiving chamber for
the _______.
The left atrium is the receiving chamber for the ______.
A. body; lungs
B. lungs; body
C. kidneys; pancreas
D. pancreas; kidneys
Answer:
A. body; lungs
two kingdom system of classification is less scientific than 5 kingdom system.WHy?
Two kingdom system of classification is less scientific than 5 kingdom system because it takes into consideration the use of more parameters.
What is Classification?This is the process in which organisms are grouped into broad categories as a result of shared similarities present between them.
The five system of classification ensures that unicellular and multicellular organisms are placed separately. Autotrophs and heterotrophs are also placed in an entirely different category unlike the two system of classification which offers small categories.
This therefore makes the two kingdom system of classification is less scientific than five kingdom system.
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A hiatal hernia is a protrusion of a portion of the _____ through the ______. Group of answer choices stomach; diaphragm duodenum; pyloric sphincter small intestine; inguinal canal rectum; anus
A hiatal hernia is a protrusion of a portion of the stomach through the diaphragm.
Hiatal hernia is a condition which arises due to a rise in blood pressure. In this condition the stomach bulges up through an opening in the diaphragm. This condition interjects with the normal mechanism of reflux that occurs through the sphincter, which is present in the esophagus. This condition usually occurs when there is excessive pressure around the stomach due to activities like repeated vomiting. This condition is usually not fatal, however, in rare and serious cases this condition can effect the esophagus and cause esophageal cancer. This condition can also lead to leakage of stomach acids and cause ulcers in the alimentary canal. In serious cases of hiatal hernia the blood flow to and from the intestine can also be effected. Serious cases need surgical treatment.
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Which of the following is not a con of solar power?
Select one:
a.
It contributes to global warming.
b.
It requires expensive technology.
c.
It is not available at night.
d.
It is not available when it is cloudy.
It contributes to global warming is not a con of solar power because this type of power does not produce pollution.
What is the disadvantage of solar power?One of the big disadvantages of solar power is that it requires high initial cost of installation because it is an expensive technology. Requires sunny weather to work best which means that it does not work at night. It has low energy conversion rate. Solar panels are fixed at to one location and we can not move it easily from one place to another.
So we can conclude that It contributes to global warming is not a con of solar power because this type of power does not produce pollution.
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A moderate-intensity activity lasting for which duration uses the aerobic system?
A moderate-intensity activity lasting for which duration uses the aerobic system is called Lactic Acid System.
What is the purpose of the Lactic Acid System?
The anaerobic lactic short-term (lactic acid, no oxygen) system starts to provide more energy to power the muscle.
Blood glucose and muscle glycogen reserves serve as the system's fuel sources. This mechanism also generates lactic acid as a byproduct in addition to energy (ATP).
What is Aerobic system?
The aerobic energy system refers to the oxygen-aided burning of lipids and carbohydrates.
The quantity of energy that may be expended during a single bout of vigorous exercise restricts the anaerobic pathways' ability to regenerate ATP at high rates.
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Shugoshin protects the cohesins on the sister chromatids in meiosis during metaphase i. a. True b. False
Answer:
B. False
Explanation:
Which of the following statements might someone use to most support a decision to buy organic produce?
The agricultural demand has caused water shortages in many areas.
The living conditions of livestock have decreased due to overcrowding.
The use of chemicals on crops poses known health risks to humans.
The application of pesticides has had a negative environmental impact.
The use of chemicals on crops poses known health risks to humans. this statement most support a decision to buy organic produce.
The agriculture industry has become more industrialized, which has increased the chemical load on the environment. Agrochemicals known as pesticides are applied to agricultural fields, public health initiatives, and urban green spaces to protect people and plants from numerous diseases. Their side effects, however, can be a significant environmental health risk factor due to their proven capacity to have a wide range of detrimental health and environmental impacts.Produce that is organic uses fewer pesticides.Because organic food lacks preservatives that extend its shelf life, it is frequently fresher.Organic farming typically benefits the environment.Animals kept organically are not fed animal byproducts, growth hormones, or antibiotics.learn more about organic produce here: https://brainly.com/question/14318031
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An indirect method of estimating bacterial numbers is based on the turbidity of the sample. a ________ can be used to determine the turbidity by measuring absorbance.
A spectrophotometer can be used to determine the turbidity by measuring absorbance.
What is absorbance?The term absorbance has to do with the amount of light that can be taken in by a sample which can be used as a measure of concentration of of the bacterial numbers in a sample.
The absorbance can only be measured by the use of a spectrophotometer. Hence, a spectrophotometer can be used to determine the turbidity by measuring absorbance.
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What is the term for the gurgling sounds that infants make in the back of their throats?
Babbling is the term for the gurgling sounds that infants make in the back of their throats
Babbling is a combination of consonant and vowel sounds — single syllable sounds like “pa” or “ba,” or long “ba-ba-ba-ba-ba.” Over time, baby babble evolves into word-sounds and eventually, basic words.
It is caused by air passing through normal saliva or refluxed milk. These gurgling noises are likely to build up during sleep. Slowly, the newborn learns to swallow more often. Nasal Noises are usually caused by dried mucus in the nose.
It usually occurs between 6 and 9 months. Babbling turns into baby jargon, or “nonsense speech.”
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Once the blood pressure cuff and stethoscope are in place, the next step is to quickly inflate the cuff pressure to __________ above the first Korotkoff sound.
Answer:
Its right answer is systolic pressure.
Hop its helpful!
Once the blood pressure cuff and stethoscope are in place, the next step is to quickly inflate the cuff pressure to 30mmHg above the first Korotkoff sound.
When a blood pressure cuff modifies the blood flow via the artery, Korotkoff noises are produced. The lower arm is being supported by the chair as the relaxed figure sits there. The subject's right arm is used to put the blood pressure cuff. The diaphragm is positioned over the brachial artery.
And the cuff pressure is swiftly raised to a level that is approximately 30 mm Hg higher than the systolic pressure as established by the palpation technique. The air is then released from the cuff .At some time, the stethoscope user will start to hear sounds with each heartbeat. The systolic pressure is indicated here.
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States of tension or arousal that arise from a biological need and are unlearned are called _____
States of tension or a rousal that arise from a biological need and are unlearned are called drive.
An unlearned, or primal, drive is a state of tension (arousal) that results from the disruption of an organism's homeostatic condition. Food can be consumed to lessen a hunger drive, which is an a roused state brought on by hunger. Driving less leads to the restoration of equilibrium. Therefore, drives can be viewed as the result of a physiological requirement that an organism is compelled to lessen or eradicate. Learning theorist Clark Hull created an equation to demonstrate the connection between motivation and learning. It is the intensity of a person's need determines the intensity of their drive
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which occurence is defined as the deep disruption of the corneal epithelium that extends into the stromal layer
Corneal ulceration is the deep disruption of the corneal epithelium that extends into the stromal layer.
What is corneal ulceration?A corneal ulcer is an open sore on your cornea. It is an inflammation of the outermost layer of the eye that goes through Bowman's layer into the deeper layers of the cornea.Corneal ulcers can occur from direct injury to the eye, or from a bacterial, fungal, or viral infection.Symptoms include eye redness, eye pain, excessive tearing, sensation of a foreign body in the eye, and worsening or blurry vision.Corneal ulcers can threaten the patient's vision so it is an emergency condition requiring aggressive treatment and evaluation by a specialist.Trauma to the eye can cause a corneal abrasion or an ulcer. Abrasions are from superficial scrapes. Ulcers are from deeper gouges.Learn more about cornea here:
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The hormone ______, which is secreted by the adrenal cortex, causes the kidney to conserve ________ ions and excrete ________ ions and indirectly helps to maintain systemic blood pressure.
The hormone adrenocorticotropin hormone (ACTH). which is secreted by the adrenal cortex, causes the kidney to conserve sodium ions and excrete potassium ions and indirectly helps to maintain systemic blood pressure.
What are hormones?
Hormones are chemical messangers or substances which are produced by the body and released to the sites where they are needed in the body.
They are substances produced by one tissue and conveyed by the bloodstream to another to effect physiological activity.
So therefore, the hormone adrenocorticotropin hormone (ACTH). which is secreted by the adrenal cortex, causes the kidney to conserve sodium ions and excrete potassium ions and indirectly helps to maintain systemic blood pressure.
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Use what you know about the effect of heat on gases to explain why, the gases came out of the leaf when it was put into warm water.
Answer:This is due to the fact that the air in the leaf's air spaces expands and escapes through the lead epidermis's stomata.
Explanation:
This happens because when leaf are submerged it is using light to continue process of photosynthesis, this process includes the release of oxygen that we see in bubble format .
What is photosynthesis?When the leaf is put in warm water it is using light to continue the process of photosynthesis. Part of this process is to let oxygen out of the leaves. It is this oxygen that you are seeing as bubbles in the water.
Which part of the leaf the gas came from?The only way for gases to diffuse in and out of the leaf is though small openings on the underside of the leaf, the stomata.
Therefore, it can be understood that this happens because when leaf are submerged it is using light to continue process of photosynthesis, this process includes the release of oxygen that we see in bubble format .
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Determine whether the following statement is true or false, and why: "The global distribution of resources is shared equally among countries. This is often a cause of conflict." A. True B. False, it should read "The global distribution of resources is not shared equally among countries. This has led to a lack of conflict." C. False, it should read "The global distribution of resources is shared equally among countries. This has led to a lack of conflict." D. False, it should read "The global distribution of resources is not shared equally among countries. This is often a cause of conflict."
The correct choice is False, it should read "The global distribution of resources is not shared equally among countries. This is often a cause of conflict" and is denoted as option D.
What are Resources?These are materials which are natural and add value to the living of the individuals in the area.
Resources are not shared equally among countries which occasionally leads to conflict and war due to different climatic conditions, topography etc.
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Which stage of the general adaptation syndrome is characterized by the body's attempt to restore homeostasis?
Resistance stage of the general adaptation syndrome is characterized by the body's attempt to restore homeostasis.
During the resistance stage, the body tries to counteract the physiological changes that happened during the alarm reaction stage. The resistance stage is governed by a part of the ANS called the parasympathetic.
The general adaptation syndrome (GAS) was first proposed by Hans Selye in his classic 1936 letter to the editor of Nature. It's consisting of three stages:- (1) alarm, (2) resistance, and (3) exhaustion.
Its resistance, during which the body adjusts its reaction in an effort to cope with a threat that is still present.
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Individuals displaying symptoms of pain in their arms and legs, fatigue and diffuse joint and bone pain are suffering from a chronic condition known as?
Fibromyalgia syndrome.
Fibromyalgia is the second most common condition affecting your bones and muscles.
Fibromyalgia syndrome (FMS) is a common rheumatoid disorder of the muscles and bones that does not involve the joints. FMS causes pain and fatigue, and people with FMS feel as if their muscles have been pulled or overworked. The condition is often misdiagnosed and misunderstood.
But it does not cause elevated inflammation levels in the bloodstream. It does not cause joint damage and is not organ-threatening. Fibromyalgia is often triggered by a stressful event, including physical stress or emotional (psychological) stress. Possible triggers for the condition include: an injury or a viral infection.
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Molecules that absorb light energy are called
Molecules that absorb light energy are called pigment.
What is pigment?A chemical that can be found in animal or plant tissue and gives off a distinctive color, such hemoglobin in red blood or chlorophyll in green plants. any chemical that adds color.Chlorophylls are plant pigments that give plants their characteristic green hue. They are also the molecules in charge of the photosynthesis process, which converts light energy into chemical energy. Chlorophylls aid in blood oxygenation and thus aid in the body's detoxification.Chemical compounds known as pigments display visible light wavelengths, giving them their colorful appearance. A certain form of pigment is present in plants, flowers, algae, some photosynthetic bacteria, and even the skin of animals. This pigment provides color and has the capacity to absorb some wavelengths.
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The base composition of an RNA virus was analyzed and found to be 17% A, 33% U, 19% G, and 31% C. Do you think the viral genetic material is single-stranded RNA or double-stranded RNA
single stranded
What is RNA virus?Deoxyribose and ribose, respectively, are the names of the pentose sugars found in DNA and RNA. The presence of the hydroxyl group on the 2' carbon of ribose and its lack on the 2' carbon of deoxyribose distinguishes the sugars.While the sugar used to construct both DNA and RNA is named deoxyribose (left in the image), the sugar used to construct RNA is simply referred to as ribose.Ribose, a 5-carbon sugar, is present in RNA, whereas deoxyribose, a 5-carbon sugar, is present in DNA. Both kinds of sugar are crucial parts of nucleotides. Pentose sugars, which are a component of DNA, can be found in nucleic acid.
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A hypothesis is an educated guess based upon observation. It is an explanation of a single event based upon what is observed. A hypothesis has not been proved but can be supported by experimentation.
a) Suppose that out of 10 trees planted in a yard, only five survived. What kind of hypothesis could you make about this observation or event? Remember that a hypothesis needs to have a certain format. (2 points)
b)How could you test this hypothesis? What type of experiment could you perform? (2 points)
c) How would this hypothesis be different from a scientific law? Review the definitions of law and hypothesis to help you. (2 points)
A hypothesis is an experimental based on scientific observation and has explanation
A hypothesis differs from scientific law because it is highly induces tentative explanation based on observation while a scientific law is a statement that summarizes the relationship between different variables.
What is hypothesis?Hypothesis is proposed explanation for a particular observation.
So therefore, a hypothesis is an experimental based on scientific observation and has explanation
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During the overhead squat assessment, which of the following muscles may likely be overactive (tight) if the arms fall forward? Latissimus dorsi Teres minor Erector spinae Subscapularis
During the overhead squat assessment, Latissimus dorsi Teres minor muscles may likely be overactive (tight) if the arms fall forward. Latissimus dorsi teres minor is the overactive muscle during the overhead squat assessment.
Over head squat is practicing mainly in sports for the alignment of total body structure with flexibility by controlling the neuromuscular.The arms falling in the upper extremity of the body where Latissimus dorsi teres minor muscle is present.Erector spinae subscapularis is present in lower extremity of the body such as LPHC (Lumbar, pelvis and diaphragm).Learn more about overhead squat on
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This functional group is a nitrogen with two hydrogens attached to it. It is found in proteins and functions as a base.
Amino group
The term "amino acid" refers to an amino acid with an amino group immediately linked to the -carbon. These contain the secondary amines proline and hydroxyproline. They were previously frequently referred to as amino acids, which is incorrect because they lack the imine grouping HN=C. The archaic phrase is still used often.
The building blocks of proteins are amino acids, which are the chemical compounds that come together to make proteins. These biomolecules are essential for human growth and development and are engaged in a number of biological and chemical processes in the body. In nature, there are around 300 amino acids.
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As autumn approaches, white-tailed deer begin to accumulate a layer of body fat. this is an example of which characteristic of life?
As autumn approaches, white-tailed deer begin to accumulate a layer of body fat. This is an example of response to the environment.
Four different strategies exist for humans to react to environmental stress: adaptation, developmental adjustment, acclimatization, and cultural reactions. A genetically based property known as an adaptation has evolved because it aids living things in surviving and procreating in a certain environment.All living things respond to environmental changes. These reactions may be brought on by adaptability, inheritance, or learning experience. An immediate, involuntary action or deliberate behavior can both be considered responses. A more persistent and slowly increasing form of responsiveness is evolution.
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That the allele that gives human red blood cells increased resistance to malarial parasites also reduces the amount of oxygen those cells can carry demonstrates
That the allele that gives human red blood cells increased resistance to malarial parasites also reduces the amount of oxygen those cells can carry demonstrates Pleiotropy.
What is Pleiotropy?
Pleiotropy is when a single gene demonstrates multiple phenotypic traits.
The cause of pleiotropy is the development of several distinct by overlapping mechanisms.
The phenotypic traits determine the external or the physical features of the organism. This could be the height, the weight, the color, etc.,
The phenotype of an organism is influenced by its genetic makeup.
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Cindy collects 20 insects for her biology class, all of which are spiders, dragonflies, and cicadas. (Note that a spider has 8 legs and no wings, a dragonfly has 6 legs and 4 wings, and a cicada has 6 legs and 2 wings.) She counts 138 legs and 36 wings altogether. How many cicadas does Cindy collect in total
Cindy collects 4 cicadas in total.
Let,
D represent the number of dragonflies
C represent the number of cicadas
S represent the number of spiders
Since the total number of insects is 20:
Equation 1
D+C+S=20
A spider has 8 legs, a dragonfly has 6 legs, and a cicada has 6 legs. Since the total number of legs is 138:
Equation 2
6D+6C+8S=138
A spider has 0 wings, a dragonfly has 4 wings, and a cicada has 2 wings. Since the total number of wings is 36:
Equation 3
4D+2C+0S=36
Multiplying equation 1 with 6 and subtracting it from equation 2:
6D+6C+8S-6(D+C+S)=138-6(20)
2S=18
S=9
Multiplying equation 1 with 4 and subtracting it from equation 3:
4D+2C+0S-4(D+C+S)=36-4(20)
-2C-4S=-44
Substituting S with 9:
-2C-4(9)=-44
-2C=-8
C=4
Thus, Cindy collects 4 cicadas in total.
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