Many people believe that all micro-organisms are harmful. Give two examples of how unicellular organisms, such as bacteria and fungi, are useful to humans and the environment.

Answer:

B. Genetic information flows from DNA to RNA to protein.

Explanation:

The central dogma of biology describes the flow of genetic information within a biological system. This dogma is often stated as "DNA makes RNA, and RNA makes protein."

Answer:

The correct answer is - C. protein - Millons' test - red precipitate is formed.

Explanation:

The iodine test is the test that is used for the identification or presence of the starch in a food sample, in this test if starch present in the food then the solution of iodine and KI will turn to deep blue color. Therefore the given result is incorrect

The benedict test for confirming if glucose present in the sample, it is a mixture of sodium carbonate, sodium citrate, and copper(II) sulfate pentahydrate which starts as aqua blue in color but after adding sample and gradually heating it turns from yellow to orange as per the concentration of the glucose. Thus, it is incorrect.

The emulsion test also produces the milky precipitate or emulsion in presence of fat or lipid in the sample. so, it is incorrect.

Millon's test for protein is the test that results in the red solution or red precipitate in the presence of the protein in the sample.

Answer:

Defense of bodies against disease = leukocytes (/white blood cells)

Cell fragments helping blood to clot = thrombocytes (/platelets)

Transport O2 and CO2 = erythrocytes (/red blood cells)

Answer: -in the cell cytosol-in the nucleus-in the cell's plasma membrane

Explanation:

Answer: D

Explanation:

Answer: Therefore, there will be 15,625 bacteria after 72 hours.

Explanation:

Let N(t) be the number of bacteria at time t. The rate of change of bacteria is proportional to the number of bacteria present, so we have:

dN/dt = kN

where k is the constant of proportionality.

Using the initial condition N(0) = 20, we can solve for k:

N(0) = 20

N(t) = N(0)e^(kt)

50 = 20e^(8k)

ln(50/20) = 8k

k = ln(5/2)/8

Now, we can find N(72):

N(72) = 20e^(72k)

N(72) = 20e^(9ln(5/2))

N(72) = 20(5/2)^9

N(72) = 15625

Therefore, there will be 15,625 bacteria after 72 hours.

Together with sodium, chloride aids in maintaining the volume and balance of extracellular fluid.

The equilibrium between the body's fluid intake and output is referred to as fluid balance, which enables metabolic processes to run smoothly (Welch, 2010). Fluid makes up about 52% of the total body weight in women and 60% in men.

Baroreceptors in the high- and low-pressure vascular circuits communicate with the kidneys during ECF volume growth.

NaCl and water excretion are enhanced as a result of these signals.

The medium for the interchange of chemicals between the ECF and the cells is provided by the extracellular fluid, and this can happen through dissolution, mixing, and transport in the fluid medium.

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In photosynthesis within one plant, other plants would be considered the surroundings.

Photosynthesis is a process that plants and other organisms utilize to transform light energy into chemical energy that may then be released to power the organism's activities via cellular respiration. Some of this chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are synthesized from carbon dioxide and water - hence the term photosynthesis, from the Greek , "light", and synthesis , "bringing together".  

Photosynthesis is performed by the majority of plants, algae, and cyanobacteria; these organisms are known as photoautotrophs. Photosynthesis is responsible for creating and maintaining the oxygen content of the Earth's atmosphere, as well as supplying the majority of the energy required for life on Earth.

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Full Question In photosynthesis within one plant, other plants would be considered the _____

A. Reactants

B. Surroundings

C. System

D. Products

Answer:

C. Europeans were able to collect and form new knowledge, and this led to Europe's unmatched power in the centuries that followed.

Explanation:

Scientific Revolution occurs in the Renaissance period in which the transition of Europe occurs from middle age towards modern era. This change occurs due to scientific revolution in the Europe. People at that time focus on obtaining knowledge and performing new research and experiments in order to obtain more knowledge and invent new technologies which make them powerful in the coming future.

Answer:

D-Rubella

Explanation:

The sentence that supports the statement that hormones are involved in the regulation of homeostasis is: The hormone erythropoietin increases the production of red blood cells when oxygen levels are low.​

Homeostasis is the condition of maintaining the adequate conditions inside the living body that are most suitable for its survival. It is the state of steady internal, physical, and chemical conditions. The correct temperature, adequate oxygen concentrations, adequate fluids inside the body are the examples of homeostasis.

Erythropoietin is the hormone produced by the kidney cells that enhances the production of RBCs in the body. This in turn enhances the oxygen concentration inside the body.

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Answer:

Eye

Explanation:

Answer:

Yes.

Explanation:

PCR and STR analysis involve using specific markers to identify the presence of a person in a sample. PCR amplifies the DNA found in the skin cells and the STR analysis looks at the genetic profile of that individual. The combination of these two allows comparative analysis of the genetic profile between the suspect and the crime scene sample. If the biomarkers are similar enough, then one could conclude that the suspect was present at the scene.

Yes, specific markers are used in PCR and STR analyses to detect human presence in samples.

The DNA present in skin cells is amplified by PCR, and the STR analysis examines the individual's genetic profile.

When these two are combined, it is possible to compare the genetic profiles of the suspect and the sample from the crime site.

The suspect may have been present at the scene if the biomarkers are sufficiently comparable.

Investigators at crime scenes can extract DNA strains into levels that can be identified and linked to a suspect using PCR. To study gene function, evolution, and other subjects, biologists can make a few copies of character genes.

Therefore, through the use of PCR, tens of thousands of thousands of copies of a specific DNA sample may be produced in a matter of hours.

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Answer:

This may lead to exhaustion and also affect normal digestion

Explanation:

High fever may create unfavourable environment for these microbes thereby reducing them. Also, the cells can be overworked and exhausted.

The use of a vaccine to stimulate the immune system to act against a specific pathogen is valuable in maintaining homeostasis because it helps to prevent diseases and infections from spreading throughout the body.

Vaccines introduce weakened or inactivated forms of pathogens or their components into the body, triggering an immune response without causing severe illness. This exposure enables the immune system to recognize the pathogen and produce specific antibodies and immune cells to target and eliminate it.

By stimulating the immune system, vaccines enhance the body's ability to defend against future infections by the same pathogen. This immune memory response allows for a faster and more robust reaction if the individual encounters the actual pathogen later on.

As a result, vaccines help maintain homeostasis by reducing the likelihood of illness and controlling the spread of infectious diseases within a population.

Furthermore, vaccines contribute to overall population health and well-being. By achieving high vaccination rates, herd immunity can be established, protecting individuals who are unable to receive vaccines due to medical conditions or age.

This collective immunity helps maintain a balanced and stable environment, limiting the transmission and impact of infectious diseases on a larger scale.

The use of vaccines in stimulating the immune system is crucial for maintaining homeostasis by preventing and controlling infectious diseases, promoting individual and population health, and establishing herd immunity to safeguard vulnerable individuals.

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Evolutionary arms race best describes the interaction between rough-skinned newts which have the ability to produce toxins against their predator garter snakes.

What is an evolutionary arms race?

It is an ongoing struggle between competing sets of co-evolving genes, and phenotypic and behavioral traits that develop escalating adaptations and counter-adaptations against each other.

One example is the arms race between bats and moths. In this, the weaponry used by each is largely based on sound and hearing.

In the above case, rough-skinned newts are compared to the host and the common garter snake is compared to a parasite. Rough-skinned newts produce toxins in defense against a predator (common garter snake). This predator exhibits resistance to the toxin produced by the newt. in this way, if the newt increased potent toxins then a common garter snake too increases its resistance to the toxin. Common garter snakes exhibit an evolutionary arms race by evolving rough-skinned newts.

Let us discuss other options

Hence rough-skinned newts and common garter snakes exhibit an evolutionary arms race.

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Answer:

C.

Explanation:

Volume, no

Milliliters , no

Surface Ratio, come on

The rate of nutrients and waste are exchanged from the cell and the environment depends on surface area to volume ratio.

The amount of square meters of surface area per unit volume is known as surface area to volume ratio.

The surface area to volume ratio becomes smaller as the size of a cell increases.

The exchange takes more time when the surface area to volume ratio is small.

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Answer:

the other wolves act as though they are their "aunts" and " uncles". It helps them survive by making sure the 2 wolves that lead the pack don't have to work too hard and they all work together as a bug family

Answer:

Wolves are very social animals. They live and hunt together in groups called packs. A wolf pack is really just another name for a family of wolves. A pack is usually made up of an adult male and female wolf and their offspring of various ages. Pack sizes range from three to twenty wolves.

A wolf pack has a definite social structure and rules of conduct. The pack leaders are the alpha male and female. These two animals are dominant over all the other wolves in the pack. The alpha male and female are the only wolves that breed and produce pups in the pack, and they also get to eat first at kills.

Wolf pups are born in the spring after a gestation period of around 63 days. A female can have anywhere between one and nine pups, but the average litter size is four pups. The pups are born with their eyes closed and are totally helpless. Pups weigh about one pound at birth. The female stays in the den nursing and caring for her pups while the other pack members hunt and bring back food for her to eat.

Explanation:

As the light rays enter into the more dense lens material, they refract towards the normal; and as they exit into the less dense air, they refract away from the normal. These specific rays will exit the lens traveling parallel to the principal axis.

Artificial selection played an essential role in Darwin's development of the theory of evolution by natural selection.

Darwin noted that humans had been able to selectively breed plants and animals to have desired features through artificial selection.

He came to understand that desirable qualities might be passed down to future generations and increase the likelihood of survival and reproduction, and that this is how natural selection operates in the world.

Natural selection could guide evolution in this manner over the course of many generations. This notion had a significant role in the development of Darwin's theory of evolution by natural selection.

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Answer:

The Correct answer is D:  Mutations are an important mechanism for the evolution of new species.  Without mutation, new genes do not arise.  Without those new genes, new species cannot evolve.

Explanation:

A:  Mutations are not always beneficial.  Many are harmful

B:  Mutations do not always occur rapidly

C.  Mutations lead to new genes, but they do not guarantee speciation.

Answer:

It is glucose molecules in Starch

Explanation:

Answer:

I don't know if I understand, but since you didn't add the distance, here is the answer

(3.834517347 x 10 ^-26) m/s^2

The goal of PCR (Polymerase Chain Reaction) is to amplify or make numerous copies of a specific DNA sequence.

The technique allows the amplification of small amounts of DNA to produce more material that is enough for molecular biology analysis.

PCR allows researchers to detect DNA from tiny samples, identify disease-causing organisms, study the genetics of ancient organisms and track the spread of disease.

The PCR technique can be used for many reasons including genetic fingerprinting for paternity testing and for detecting bacterial or viral infections.

The Polymerase Chain Reaction (PCR) technique is used to generate millions or billions of copies of a specific DNA sequence, creating the desired fragment of DNA in a laboratory setting.

In molecular biology, the end goal of PCR is to amplify DNA fragments for subsequent DNA sequencing, DNA cloning, genotyping, and genetic mutation analysis.

The main goal of PCR is to produce many copies of DNA sequences from a sample to the point that it is detectable. The technique is powerful in that it allows for the amplification of small amounts of DNA, enabling it to be detected more easily by other molecular biology methods.

PCR technology is used in a variety of applications including medical diagnosis, forensic analysis, and scientific research.

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The end goal of the Polymerase Chain Reaction (PCR) is to amplify a specific DNA sequence, allowing scientists to have enough material for further analyses of DNA-related matters such as genetic diseases or determining paternity.

The end goal of the Polymerase Chain Reaction (PCR) is to amplify a specific DNA sequence from a small sample of DNA, producing millions of copies of a specific DNA region. This is achieved through a cyclical process involving three steps: denaturation, annealing, and DNA synthesis at different temperatures. The amplification allows scientists to have sufficient DNA for further analyses in laboratories.

PCR is particularly helpful in cloning gene fragments to analyze genetic diseases, identifying contaminant foreign DNA in a sample, DNA sequencing, and in practical applications such as detecting genetic diseases and determining paternity. In essence, PCR plays a crucial role in modern genetics and genomics, allowing scientists to focus on a specific part of an organism's genetic material.

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Answer: Mendelian inheritance states that traits are determined when offspring receive alleles for each trait from either of the parents. Traits can be dominant, which means they can be seen and are capable of masking a different trait. ... Alleles are different versions of the same genes in an organism

Explanation: Allels can be either recessive or dominant.

Explanation:

DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.

Answer:

Mitosis is the process of cell division usually dedicated to cell growth or asexual reproduction. There are five phases of mitosis, which include prophase, prometaphase, metaphase, anaphase, and telophase. These phases are followed by cytokinesis. The end product of mitosis is two diploid daughter cells that are genetically identical to the mother cell.

Meiosis is the process of cell division that is dedicated to sexual reproduction. Meiosis occurs in two parts, which the same phases of mitosis that are essentially repeated twice. Meiosis increases genetic diversity due to crossing over and independent assortment that occurs during meiosis 1. The end product of meiosis are four haploid cells that originated from one mother cell.

Explanation: