Genetic variation is the variation in alleles and genes that is responsible for the differences among individuals of the same species. It arises from the combination of different alleles in an individual’s genome.
Genetic variation is the foundation of evolution, which is responsible for creating and maintaining the diversity of life on Earth. It is the raw material upon which natural selection acts to drive evolution. Therefore, the fourth option "genetic variation must be present in a population before natural selection can act upon the population" is accurate.Given this fact, it is important to maintain genetic variation within a population.
Genetic variation can be reduced in a population due to inbreeding, genetic drift, and natural selection. Inbreeding results in the loss of alleles from a population, genetic drift causes random fluctuations in allele frequencies, and natural selection eliminates alleles that confer lower fitness.
Therefore, populations with low genetic variation are more susceptible to genetic disorders and environmental changes than those with high genetic variation.
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Which of the following is NOT true about ATP?
it is a good energy donor
it is for long term energy storage
it has 3 phosphate groups
the third phosphate group is unstable making it very reactive
what are the caractheristics of viruses,bacteria,protists and fungi
Answer:
Bacteria,fungi and protists are all heterotrophs, taking their food source from something else. Fungus can also be used as food or as a pest, poisoning and killing plants in your yard (watermole- Potatoe famine). Protists: Protists have eukaryotic cells,and can be heterotropic but can be autotropic.
teratogens have their largest structural effects during the embryonic period primarily because this is the time when the unborn baby is
Teratogens refer to substances, chemicals, or environmental agents that cause birth defects or malformations in a developing fetus when pregnant women are exposed to them.
Teratogens have the most significant structural effects during the embryonic period, primarily because this is the time when the unborn baby is rapidly growing and developing.
During this period, the developing fetus is referred to as an embryo and goes through a series of critical stages, such as gastrulation, neurulation, and organogenesis. Therefore, any interference with this stage can be extremely harmful and damaging to the unborn baby.
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which procedure is used to assess the volume and air flow rate of the lungs? group of answer choices bronchoscopy sputum culture pulmonary function test sweat test arterial blood gases
The procedure that is used to assess the volume and air flow rate of the lungs is the Pulmonary Function Test (PFT). These tests evaluate the breathing mechanics of the lungs by measuring how much air an individual inhales and exhales, how quickly air moves in and out of the lungs, and how well oxygen is delivered to the body.
The tests are non-invasive and are performed using a machine called a spirometer, which measures how much air is inhaled and exhaled, and how fast the air is moving in and out of the lungs. The patient will be asked to breathe in and out through a mouthpiece attached to the spirometer, which will then record the amount and speed of air inhaled and exhaled.A PFT can help diagnose various respiratory conditions such as asthma, chronic obstructive pulmonary disease (COPD), and lung cancer.
The results of the test can also determine the effectiveness of treatment and provide information on the severity of the condition.Moreover, the test can determine how well an individual's lungs are functioning before undergoing surgery or starting a new medication.
Overall, the Pulmonary Function Test is an important diagnostic tool for evaluating the lung's volume and air flow rate, helping healthcare providers make informed treatment decisions for respiratory conditions.
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normal microbiota are typically found in and on all the following body locations except the group of answer choices skin. mouth. colon. blood. upper respiratory system.
Normal microbiota are typically found in and on all the following body locations except blood.The human body is home to millions of microorganisms that interact with its host in various ways.
The commensal microorganisms that are naturally found in or on the human body are referred to as normal microbiota or flora. These microorganisms can be found in various parts of the body, such as the mouth, skin, colon, and upper respiratory system.
Skin:
The skin of a human body is the largest organ. It is inhabited by many microorganisms that are known as commensal bacteria. They coexist peacefully with human cells and are usually harmless.
Mouth:
The human mouth is home to a diverse group of microorganisms, including bacteria, fungi, and viruses. The mouth's normal flora can be divided into two categories based on their location.hard and soft tissues. The hard tissues are covered by plaque, while the soft tissues include the tongue, cheeks, and gums.
Blood:
Although the human blood can become contaminated with microorganisms during infection or injury, it is not typically colonized by normal microbiota. Therefore, normal microbiota is not found in the blood.
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1. Land Surface
2. Unsaturated Zone
3. Groundwater
4. Surface Water
Land Surface
Unsaturated Zono
Surface Water
Groundwator
If a gallon of a toxic chemical is spilled on the land surface, which of the following are likely to become contaminated?
Answer:
1, 2, 3, and 4
Explanation:
The soil can allow substances from the surface of the land to pass through it and end up in the groundwater. Thus, option C is correct.
What is the effect of toxic chemical on land surface?Runoff from overused crop fertilizer causes an overabundance of water plants to grow in rivers. The river banks become overgrown with excess drop debris, which slows the flow of the river.
Nitrate. The most frequent chemical contamination found in the world's aquifers and groundwater is nitrate. Extremely high levels of nitrate in groundwater are a major health concern in some low-income nations.
When man-made substances like chemicals, oil, road salts, and gasoline contaminate groundwater, they render it hazardous and unfit for human consumption.
Therefore, Over fertilization can lead to run off that has negative effects on aquatic habitats due to excessive nutrient loading.
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Electricity falls into what class of energy (A)Chemical because of the reactions taking place
(B) lonization energy because the differences in charges between electrons and protons
(C) potential because it is stored in an outlet
(D) Kinetic because of the movement of electrons
can fish see water like that keeps me up all night
Answer:
I do not think so.
Explanation:
As humans don't see air I believe they can't see the water.
Lol Hope this helps :)
Which description has the celestial bodies in correct order by size, starting with the smallest?
Answer:
B
Explanation: I hope this help's some!! :)
Which of the following types of nitrogen can plants and animals assimilate?
1, Water vapor
2. Atmospheric Nitrogen
3. Nitrates
4. Plants and animals don't need nitrogen
Answer:
Nitrates
Explanation:
because plants absorbed nitrates during assimilation process after while they are converted into nitrogen containing organic molecules. Animals cannot absorbed nitrates so directly. They received their nutrients after supplies by consuming plants or pants consuming them.
Which of the following statements best describe the importance of carbon in the cells
what is the most abundant nitrogenous waste that the kidneys remove from the blood? answer urea uric acid creatinine ammonia
The kidneys help remove various waste products and excess fluid from the body through urine. Nitrogenous waste is a byproduct of protein metabolism in the body. The most abundant nitrogenous waste that the kidneys remove from the blood is urea.
The nitrogenous waste that is most abundant in the blood and needs to be removed by the kidneys is urea. It is produced in the liver from the breakdown of excess amino acids and is a normal component of urine. The blood carries the urea to the kidneys where it is filtered and removed from the body through urine.Uric acid is another nitrogenous waste product that is formed from the breakdown of purines.
It is normally excreted in the urine, but high levels in the blood can lead to gout, a painful form of arthritis. Creatinine is a waste product that is produced from the breakdown of creatine in muscles. It is normally excreted by the kidneys and can be used to measure kidney function.
Ammonia is a byproduct of protein metabolism in the body and is converted into urea by the liver. It can be toxic in high levels and is also excreted by the kidneys in urine.
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E
How does latitude affect climate?
Places located at high latitudes (far from the equator) receive less sunlight than places at low latitudes (close to the equator). The amount of sunlight and the amount of precipitation affects the types of plants and animals that can live in a place.
Deforestation destroys ________ of animals and affects wildlife.
Hi there.
Thanks for using Brainly.
Deforestation destroys habitat of animals and affects wildlife.
First, let's discribe "Deforestation":
This means clearing a wide area.
For example: A wildfire destroyed 100 miles of land.
This fire probably destroyed thousands of homes for animals, destroying habitats.
Therefore habitat is the perfect use for this sentence.
- Tutor Johnson
PLEASE HELP - Toads choose to live in hot, dry regions and bury themselves in the soil during the day. How might this be a behavior important for a survival ?
Life science photosynthesis exam questions
Answer:
Yes
Explanation:
I think so I also don't know correctly if you know the the correct answer please inform and mark me as the brilliantest ok please
The simple molecules connect at an inorganic point to make a larger molecule.The structure of a simple organic molecule makes it possible for simple organic molecules to combine to make a larger molecule. Which statement best explains this phenomenon? (5 points)
The backbone of the organic molecule is made up of carbon atoms.
Organic and inorganic molecules combine to make a larger molecule.
The backbone of the organic molecule is made up of helium and hydrogen atoms.
The simple molecules connect at an inorganic point to make a larger molecule.
Answer: A. The Backbone of the organic molecule is made up of carbon atoms.
Explanation:
what is referred to as pain, and how is it useful in diagnosing internal disorders?
Pain is defined as an unpleasant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage. Pain is essential in diagnosing internal disorders because it serves as a warning signal that the body is experiencing injury or tissue damage.
Doctors can use pain to pinpoint the location of the internal disorder, as well as to determine its severity.
Pain is defined as a discomfort, distress, or suffering caused by damage or illness to a part of the body. Pain can be caused by injury, surgery, illness, emotional distress, or chronic conditions such as arthritis. Pain can be experienced in different ways depending on the type, location, and severity of the injury or illness. It can be sharp, dull, burning, throbbing, stabbing, aching, or cramping.
Additionally, pain can be classified as acute or chronic depending on its duration.Acute pain is sudden and typically lasts less than three months. It is typically caused by tissue damage or injury and is often accompanied by inflammation. Acute pain is a warning sign that the body is experiencing injury or tissue damage. It serves as a protective mechanism to prevent further damage or injury to the affected area.
Referred pain can be caused by a problem in an internal organ, which can make it difficult to diagnose. Doctors use pain to help diagnose internal disorders by taking a detailed medical history, performing a physical exam, and ordering diagnostic tests such as blood tests, imaging tests, or biopsies. In some cases, pain may be treated with medications or other therapies to help alleviate discomfort.
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What is true for carbohydrates?
Carbohydrates are in contact with the aqueous fluid both inside and outside the cell.
Carbohydrates are present only on the interior surface of a membrane.
Carbohydrates span only the interior of a membrane.
Carbohydrates are present only on the exterior surface of a membrane.
Answer:
the 3rd one
Explanation:
Answer:
Carbohydrates span only the interior of a membrane.
Explanation:
the name of the benign tumor that is slow growing but locally aggressive and derived in association with an impacted tooth and dentigerous cyst is termed
The benign tumor that is slow-growing but locally aggressive and derived in association with an impacted tooth and dentigerous cyst is termed ameloblastoma.
Ameloblastoma is a type of odontogenic tumor that arises from the cells responsible for forming tooth enamel.
It commonly occurs in the jawbones, particularly around the impacted tooth or within a dentigerous cyst, which is a fluid-filled sac that surrounds an unerupted tooth.
Ameloblastomas are known for their slow growth but can exhibit locally aggressive behavior, causing bone destruction and expansion of the affected area.
They are usually benign, meaning they do not spread to other parts of the body, but their aggressive growth pattern can cause significant damage and complications.
Treatment typically involves surgical removal of the tumor and affected tissues, and in some cases, additional treatments such as radiation therapy may be required to ensure complete eradication.
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How does subsistence affect culture?
from anthropology perspect
Subsistence, referring to the way people obtain their basic needs, has a profound impact on culture. It influences social structures, division of labor, values, beliefs, and daily practices within society.
Explanation:
From an anthropological perspective, subsistence plays a crucial role in shaping culture. Subsistence refers to the means by which people obtain their basic needs, including food, water, shelter, and resources. The way society meets these needs influences various aspects of its culture.
Subsistence strategies, such as foraging, pastoralism, horticulture, agriculture, or industrialization, determine how people organize themselves socially, their division of labor, and their relationship with the natural environment. For example, nomadic hunter-gatherer societies have different social structures and mobility patterns compared to sedentary agricultural societies.
Subsistence practices also impact values, beliefs, and daily practices within a culture. The methods of food production and availability shape culinary traditions, religious rituals, and social norms related to food sharing and distribution. Subsistence strategies influence the development of technology, artistic expressions, and economic systems within society.
Overall, subsistence is deeply intertwined with culture as it shapes the social, economic, and symbolic aspects of society. Understanding a community's subsistence practices provides valuable insights into its cultural patterns, social organization, and worldview.
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how does fermentation cause yeast dough to rise differ from fermentation in muscles
The process of fermentation differs in yeast dough and muscles in terms of the end products and the purpose of fermentation.
In yeast dough, fermentation is primarily carried out by yeast cells. Yeast consumes sugars present in the dough and produces carbon dioxide gas as a byproduct. This gas gets trapped in the dough, creating air pockets, and causing the dough to rise. The fermentation process in yeast dough is used to leaven the dough, making it light and fluffy when baked.
On the other hand, fermentation in muscles, specifically during intense physical activity, involves a different mechanism. Muscles undergo anaerobic respiration when there is a lack of oxygen supply. This anaerobic respiration leads to the production of lactic acid as a byproduct. The buildup of lactic acid in muscles causes fatigue, cramping, and discomfort.
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Complete Question
How does fermentation cause yeast dough to rise differ from fermentation in muscles?
What is one difference (other than distance from the sun) between terrestrial planets and Jovian planets? Group of answer choices Terrestrial planets are much larger than Jovian planets. Jovian planets are mostly gas and liquid, terrestrial planets are solid and rocky. Terrestrial planets have thick, gaseous atmospheres, while Jovian planets just have thin atmospheres. Jovian planets have a rocky and icy solid surface, while terrestrial planets have no surface to stand on.
Answer:
The correct answer is - Jovian planets are mostly gas and liquid, terrestrial planets are solid and rocky.
Explanation:
Jovian planets also are known as gas planets due to the fact that they are made of gases. These planets are thick or dense with a large size in comparison to the terrestrial planets. These planets have more moon and termed as outer planets.
Terrestrial planets are made of the rocky surface that is denser than gas planets. These planets are known as inner planets. These planets are comparatively smaller and have less or no moons.
tigers and lions usually do not hybridize due to their different ranges. however, when in the same environment, they may hybridize to produce a liger, which are sometimes sterile and usually produce weak offspring if they do manage to reproduce. this is an example of:group of answer choicestemporal isolationhybrid sterilityhybrid inviabilityf2 breakdownpostzygotic isolationecological isolationbehavioral isolationprezygotic isolation
Answer: When organisms from two different species mix, or breed together, it is known as hybridization.
Explanation: The offspring that are produced from these mixes are known as hybrids. Hybrids occur in the natural world and are a powerful evolutionary force. They are also important in our daily lives—you probably eat hybrid plants every day. In this article, we dive into the exciting world of hybridization, describing how it occurs and what can happen when hybrids have babies.
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what percentage of plant and animal species on earth are found in tropical rainforests?responses10 00%more than 50%
Tropical rainforests account for only about 6% of the Earth's land surface. However, they house the vast majority of the world's plant and animal species. It is estimated that more than half of the world's plant and animal species are found in tropical rainforests.
This means that the percentage of plant and animal species on Earth that are found in tropical rainforests is more than 50%.The exact percentage varies depending on the source, but some estimates put the number at around 80%.
Despite covering such a small area, tropical rainforests are some of the most biodiverse regions on the planet. They provide habitats for countless species of plants and animals, many of which are found nowhere else on Earth.
The loss of tropical rainforests due to deforestation and other human activities has significant implications for global biodiversity and the health of the planet as a whole.
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For energy, there is a one-way flow through an ecosystem, while matter is ________.
Answer:
constant is the answer
dna polymerase binds to the template dna. in which direction is the new dna subsequently synthesized?
The new DNA is synthesized in the 5' to 3' direction. DNA polymerase binds to the template DNA when replicating a new DNA strand .DNA replication is semi-conservative, meaning that each of the resulting two DNA molecules would have one original strand and one new strand.
It proceeds in a 5' to 3' direction, meaning that DNA is synthesized in a 5' to 3' direction. Therefore, DNA polymerase moves along the template DNA strand in a 3′-to-5′ direction.
DNA polymerase can only extend the free 3′-OH end of the growing strand because it requires a 3′-OH group to add nucleotides to the growing DNA chain. It reads the template DNA strand in the 3′-to-5′ direction but synthesizes the new strand in the 5′-to-3′ direction.
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Enzymes...
make things easier for your cells
make things harder for your cells
Answer:
make things easier for your cells.
Explanation:
enzymes speed up reactions in cells which help them out in the long run.
When studying a population, you are studying the organisms of a single species in what type of area(s)?
A. a designated area
B. multiple areas
C. random areas
thank you!!
what was the purpose of leaving the cover on one set of petri dishes? how did the growth on these plates differ from the growth on the uncovered plates that were exposed to uv light for the same amount of time
The purpose of leaving the cover on one set of petri dishes is to determine whether the cover can block or limit UV light exposure. The growth on these plates differed from the growth on the uncovered plates that were exposed to UV light for the same amount of time as follows:
After 24 hours of incubation, we observed the growth of bacteria colonies in the petri dishes. The bacteria colonies on the uncovered plates were expected to have been significantly reduced due to the effect of the UV light. The experiment was conducted to determine if UV light exposure can be used to inhibit the growth of bacteria colonies.
Bacteria growth was expected to decrease in petri dishes exposed to UV light. However, when compared to uncovered petri dishes, petri dishes covered with the lid were expected to have more bacterial growth. This was due to the fact that the lid provided some level of protection against UV light.
UV light is a type of electromagnetic radiation that can damage or kill bacteria and other microorganisms. Because of this, it is used in various applications to sterilize equipment, disinfect surfaces, and preserve food. It is also used in scientific experiments to study the effects of radiation on microorganisms.
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