Which of these is an example of an undesirable effect of friction?
a. copying notes on the board
b. energy loss in machines
c. keeping our balance
d. walking down the street

will mark brainliest

Answer:

Life Span: 70 years

Diet: Carnivore

The name Sperm Whale is short for Spermaceti Whale.

They have the longest intestinal system in the world, exceeding 984 feet (300m) in larger specimens.

They are the deepest diving mammal.

They migrate seasonally for feeding and breeding.

The Sperm Whale has the largest brain of any animal on Earth.

Explanation:

The pest of rice crops is purple witchweed. Thus, option C is correct.

The hemiparasitic plant Striga hermonthica, sometimes known as purple witchweed or giant witchweed, is a member of the Orobanchaceae family. It destroys important crops like rice and sorghum. Along with sorghum and rice, it also infests maize, pearl millet, and sugar cane in sub-Saharan Africa.

Striga hermonthica, a purple witchweed that infests about 40% of the arable land in the savanna region and poses a threat to the lives of over 100 million Africans, is thought to be responsible for a yearly loss of $7 to 13 billion. It almost certainly causes more crop loss in Africa than any other single weed species. In six countries in West Africa alone, over 5 million ha of crops, primarily sorghum, millets, and maize, are affected; it's possible that 10 million ha of crops are affected throughout all of Africa.

Hence, purple witchweed is a pest for rice crops.

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Answer:

Change is the only thing that is constant in this world. Obviously, more discoveries would be made in the nearest future that will give their thought about science a new direction.

Explanation:

The shape of carbohydrates and lipids can help distinguish between them. Carbohydrates typically have a ring-like structure, whereas lipids have a more linear or branching structure.

Carbohydrates:

Carbohydrates, such as glucose or fructose, exist as ring structures. These rings are formed by the bonding of carbon atoms with oxygen atoms, creating a cyclic structure. Carbohydrate rings can vary in size, including 5-membered (pentose) or 6-membered (hexose) rings. These ring structures give carbohydrates their characteristic shape.

Lipids:

Lipids, on the other hand, are composed of hydrocarbon chains. They are long chains of carbon and hydrogen atoms, often with few or no oxygen atoms present. Lipids can be classified into various types, including fatty acids, triglycerides, phospholipids, and steroids. These structures are more linear or branched than carbohydrates.

By examining the shape and structure of molecules, it is possible to differentiate between carbohydrates and lipids based on their distinct characteristics. However, it is imperative to note that the classification of molecules as carbohydrates or lipids extends beyond just their shapes. It also takes into account their chemical composition, functional groups, and biological roles.

The change in surgical anesthetic is considered a minor change that would not require formal IACUC review and approval. Here option D is the correct answer.

An Institutional Animal Care and Use Committee (IACUC) is a committee that monitors and regulates animal research and experimentation. The IACUC is an independent regulatory body that ensures that the use of animals is justified and complies with federal and institutional regulations.

The IACUC is a group of scientists, veterinarians, animal welfare advocates, and community members who are knowledgeable about the animal species and research protocols being utilized. It is responsible for reviewing animal care and use protocols, making recommendations, and overseeing animal care and use programs within institutions.

It also monitors the institution's animal care and use programs on a regular basis and makes recommendations for improvements as necessary.

In this context, the change in surgical anesthetic is considered a minor change that would not require formal IACUC review and approval.

In addition, changes to animal housing, feeding, watering, and caging that are consistent with animal welfare guidelines are minor modifications that do not necessitate formal IACUC review and approval. Therefore option D is the correct answer.

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the light reactions take place in the chloroplast thylakoids and the calvin cycle takes place in the the stroma.

The light reactions take place in the thylakoid membranes of the chloroplasts, and the Calvin cycle takes place in the stroma of the chloroplasts.

The light reactions of photosynthesis are the series of chemical reactions that convert light energy into chemical energy in the form of ATP and NADPH. These reactions take place in the thylakoid membranes of chloroplasts and are essential for the production of energy that drives the process of photosynthesis.

The light reactions involve the absorption of light by pigments such as chlorophyll and the transfer of electrons from water to NADP+ through a process called photolysis. The energy from this electron transfer is used to generate ATP and NADPH, which are then used in the Calvin cycle to convert carbon dioxide into glucose and other organic compounds.

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Answer:

Explanation:

A RCB (red blood cell) present in human beings does not have a cell wall, only plants have cell wall.

Here,

The RCB has,

Cell wall - absent

Nucleus - present

Option B

Answer:

Los detritívoros

Explanation:

Los detritívoros son organismos que se alimentan tanto de plantas como de animales en descomposición (detritos). Los organismos detritívoros representan un componente fundamental de los ecosistemas ya que de ellos depende el reciclaje de nutrientes en los ciclos biogeoquímicos. Los detritívoros incluyen bacterias (por ej., bacterias nitrificantes claves en el ciclo del nitrógeno), animales (por ej., la cochinilla de la humedad, lombrices, etc) y hongos saprófitos (por ej., Fomitopsis pinicola, Fomes fomentarius, los cuales crecen sobre la madera y/o sus restos). Los detritívoros se encuentran en todos los tipos de ecosistemas y tienen un rol fundamental en la cadenas trófica mediante su activa participación en los ciclos biogeoquímicos, especialmente en el ciclo del nitrógeno.

During the session, students asked a few questions. Here are the questions that are related to the current evidence on climate change: Where on Earth has the population decreased in the last decade. This question is not related to the current evidence on climate change. It is a question related to population trends.

It is not directly related to climate change. What is the average cost of a college education per person. This question is not related to the current evidence on climate change. It is a question related to education costs. It is not directly related to climate change. By what rate has the melting of glaciers increased.

This question is related to the current evidence on climate change. The melting of glaciers has increased significantly due to climate change, and this is a well-documented fact.Where are the average temperatures changing on Earth?This question is related to the current evidence on climate change.

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Answer:

Growth and limiting

Explanation:

To use the t-statistic to test for a difference between the means of two populations, the following assumptions must be made about the two populations and the samples:

The t-test is a statistical method that is used to determine whether the means of two groups are statistically significant. The t-test is based on the t-distribution, which is used to calculate the probability of observing a certain value for the test statistic assuming that the null hypothesis is true.

The t-test is used when the data being analyzed is normally distributed and the variances of the two groups are approximately equal. The t-test assumes that the data being analyzed is continuous, that the observations are independent of each other, and that the sample size is large enough to use the t-distribution. If these assumptions are not met, the t-test may not be appropriate.

The t-test is a valuable tool for determining whether there is a significant difference between the means of two groups. By using the t-test, researchers can determine whether the difference between the means is due to chance or whether it is statistically significant.

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Water can move across the membrane in all bags containing solutions of sugar, provided the membrane is semi-permeable.

In such cases, water molecules move through the membrane to balance the concentration of sugar on both sides, following the principle of osmosis.

Water movement across the membrane in bags containing solutions of sugar will depend on the concentration of the sugar solution inside and outside the bag. If the concentration of sugar inside the bag is higher than the concentration outside, water will move from the outside solution into the bag, resulting in an increase in the volume of the solution inside the bag. However, if the concentration of sugar inside the bag is lower than the concentration outside, water will move out of the bag, resulting in a decrease in the volume of the solution inside the bag. So, whether water moved across the membrane in all bags containing solutions of sugar will depend on the specific concentrations of the sugar solutions inside and outside the bags.

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Water moved across the membrane in order to create equilibrium between the concentrations of water on both sides.

It can be concluded that water moved across the membrane in all bags containing solutions of sugar because the net movement of water molecules is always from the area of high concentration to low concentration. This is called osmosis, and the process continues until both sides of the membrane become equal in terms of concentration.

In this experiment, bags with different concentrations of sugar were used, which created different concentrations of water molecules on either side of the membrane.

Therefore, water moved across the membrane in order to create equilibrium between the concentrations of water on both sides.

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Individuals of a fish species living in a river have varying oxygen level requirements,causing oxygen levels in the water to decrease, directional selection has taken place in this population.

In a population, directional selection occurs when individuals with features on one side of the mean survive longer or reproduce more frequently than those on the other. Natural selection known as directional selection occurs when one extreme phenotype is selectively favored. In other words, those who possess this feature have a higher chance of having children. The chemical element with the atomic number 8 and symbol O is oxygen in this sort of selection. The extremely reactive oxygen, which belongs to the chalcogen group in the periodic table, is also necessary for surgery and trauma. Infants, the elderly, and pregnant women are vulnerable populations who require oxygen on a daily basis.

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Answer:

Just look at my explanation you will find the answer :)

Explanation:

Electron transfer in the ETC is coupled to proton transfer from the matrix to the intermembrane space.

-Prosthetic groups, such as iron-sulfur centers, are directly involved with electron transfer.

- The outer membrane of mitochondria is readily permeable to small molecules and hydrogen ions.

-Electron carriers are organized into four complexes of proteins and prosthetic groups.

-Electron carriers in the ETC include ubiquinone (coenzyme Q) and cytochrome c.

Answer: Plant more trees or eat less red meat

Explanation:

Answer:

No, high percentage of Sand particles don't contribute to high porosity. Water in sandy soil just passes through it because of larger pore diameter.

A high percentage of sand particles contributes to low porosity of soils.

Porosity is a characteristic that determines the level of pores in soils.

When it comes to porosity, the component of soil with the highest is clay, followed by silt, and then sand.

Sand particles are large and leave little pores as compared to the particles of silt and clay which are smaller.

Thus, the more sand particles in soils, the lower the porosity.

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Charles Darwin

The theory of evolution is a shortened form of the term “theory of evolution by natural selection,” which was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.

hope this helps

Answer:

Small living beings that live in the heart are usually referred to as endocardial parasites or endocarditis-causing organisms. Endocarditis is the inflammation of the endocardium, which is the inner lining of the heart chambers and heart valves. It can be caused by various microorganisms, including bacteria, fungi, and in rare cases, parasites.

However, it's important to note that parasites living in the heart are relatively uncommon compared to other types of microorganisms. The majority of cases of endocarditis are caused by bacterial infections. Bacteria such as Streptococcus, Staphylococcus, and Enterococcus are commonly associated with endocarditis.

Parasitic infections that can affect the heart include certain species of worms, such as the dog heartworm (Dirofilarial imcites) and the human parasite called Echinococcal. These parasites typically do not directly inhabit the heart itself but can affect the heart and its surrounding structures.

It's essential to consult with a healthcare professional if you suspect any cardiac-related infections or diseases to receive an accurate diagnosis and appropriate treatment.

Explanation:

Answer:B) mens

Explanation:

Answer: vaccines help to protect us from a disease by giving our immune system a sample so that when the real disease comes, your body will be ready to fight it off.

Explanation:

Hope that helps!

Answer:

Fatty acids are lipid monomers that consist of a hydrocarbon chain with a carboxyl group attached at the end. Fatty acids form complex polymers such as triglycerides, phospholipids, and waxes. Steroids are not considered true lipid polymers because their molecules do not form a fatty acid chain.

Explanation:

The probative value of soil as evidence depends on its uniqueness and ability to match it to a specific location.

The probative worth of soil as proof relies upon its uniqueness and the capacity to match it to a particular area or source. Soil is made out of an intricate combination of minerals, natural matter, and different materials, and its organization can change broadly between various areas.

By contrasting the physical and compound properties of soil tests found at a crime location with those found at a suspect's home or different areas of premium, measurable examiners can some of the time lay out a connection between the two. In any case, the value of soil as proof is restricted by variables, for example, enduring, pollution, and human exercises that can change its organization and dark any recognizing attributes.

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To enhance the solubility of the enzyme without disrupting its overall structure, the hydrophobic amino acids in the repeating sequence can be replaced with polar or charged amino acids such as Arginine (Arg) and Glutamic acid (Glu).

By substituting some of the nonpolar amino acids in the repeating sequence (Arg-Leu-Ala-Gly-Thr) with polar or charged amino acids, the hydrophobic character of the protein can be reduced, thereby increasing solubility in water. Arginine (Arg) and Glutamic acid (Glu) are examples of amino acids with polar or charged side chains that can enhance solubility.

These substitutions introduce more hydrophilic interactions, allowing the protein to interact favorably with water molecules. It is important to maintain the overall structure of the enzyme while modifying the sequence.

By strategically introducing these changes at specific positions within the repeating sequence, the desired improvement in solubility can be achieved without significantly disrupting the overall structure and function of the enzyme.

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Answer:

bad cholesterol

Explanation:

Your body needs healthy fats for energy and other functions. But too much saturated fat can cause cholesterol to build up in your arteries (blood vessels). Saturated fats raise your LDL (bad) cholesterol. High LDL cholesterol increases your risk for heart disease and stroke.

Answer:

The person's bad cholesterol would decrease.

Explanation:

edgy 2021

Answer:    Reproductive Cell

Explanation:

Meiosis is a specialized form of cell division that produces reproductive cells, such as plant and fungal spores and sperm and egg cells. In general, this process involves a "parent" cell splitting into two or more "daughter" cells.

Answer:

Meiosis is a specialized form of cell division that produces reproductive cells, such as plant and fungal spores and sperm and egg cells. In general, this process involves a "parent" cell splitting into two or more "daughter" cells.

Somatic cells undergo mitosis to proliferate, the germ cells undergo meiosis to produce haploid gametes (the sperm and the egg).

P.S.

( all of this information was taken from G00GLE, so all credit due there. ).

The English scientist who independently co-discovered the theory of natural selection was Alfred Russel Wallace.

Alfred Russel Wallace was a British naturalist who independently developed the theory of natural selection around the same time as Charles Darwin. In 1858, Wallace sent Darwin a letter outlining his ideas on natural selection, which prompted Darwin to publish his own work on the topic.

The two men went on to jointly present their findings at the Linnean Society in London in 1858. Although Darwin is more widely known for his work on evolution and natural selection, Wallace's contributions to the theory were significant and he continued to make important contributions to the field throughout his career.

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During protein digestion, cholecystokinin from the duodenum stimulates release of trypsinogen, carboxypeptidase, and chymotrypsinogen from the: (4) pancreas.

Cholecystokinin is the hormone of the gastrointestinal system. It is a peptide hormone which stimulates the digestion of the fats and proteins. It is released after every meal intake. The enzyme is also known by the name pancreozymin.

Pancreas is a GI organs as well as a gland. It acts as gland by the secretion of insulin and glucagon hormones. It acts as a GI organ because it releases digestive enzymes like trypsinogen, carboxypeptidase, and chymotrypsinogen involved in the breakdown of fats, proteins and carbohydrates.

Therefore the correct answer is option 4.  

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Answer:

C. 3 days

Explanation:

Answer:

c

Explanation:

2-5 days after exposure is when symptoms show

taken from the minnesota department of health