please order the following choices to reflect the appropriate sequence of materials used in the gram staining procedure. 1. Crystal violet
2. Gram's iodine
3. Alcohol
4. Safranin

Answer:

B

Explanation:

Meiosis produces gametes that contain one complete haploid set of chromosomes

Meiosis is a reduction division, where the number of chromosomes in the daughter cells is reduced to half as compared to the parent cell. This set of chromosomes is called a haploid set or genome. The reduction from diploid to haploid occurs during Anaphase I of meiosis I, where homologous chromosomes separate and enter into two different cells. Meiosis takes place only in reproductive cells that divide to form gametes

So, the correct answer is 'Meiosis produces gametes that contain one complete haploid set of chromosomes'

hope that helps

Answer:

1 contact force is a force in touch

non contact force is a force with out in touch

the sum of a forces acts upon on a body

equal amount of force applied on one object

Answer:

1/non contact force is like wind  and they are different because they can move in a different way like if you move a big rock by touching it its going to go to the place you want it to go compared to wind it might go somewhere else

Explanation:

2,net force is how much force you putting or pulling

3.the object does not go anywhere

Answer:energy

Explanation:

We refer to these changes as mutations whenever the DNA sequence or the structure of the genes changes.

Mutations known as substitution mutations occur when one base pair is changed for another. Insertion mutations are changes to the DNA sequence when one or more nucleotides are inserted.

Is a mutation's impact higher in a deletion or a substitution? Because the remaining portion of the strand is different, deletion has a higher impact than replacement, which can only change one amino acid. Point mutation: What is it? a change that takes place in one amino acid (substitution).

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Answer:

Explanation:

left main bronchus

In simple words, extinction refers to when any species disappear or gets terminated.

Extinction can occur either due to natural events such as tsunami, earthquake, etc. or due to human influence such as air pollution, water pollution, etc. When the last member of any species is dead then it is called as extinction of their species.  

Examples of the death of species can be climate change, pollution, etc. Examples of species which are extinct : Dodo, Tasmanian Tiger, Dinosaurs, Golden Toad, Great Auk, Javan Tiger, etc.

Extinction is of three types ;

1. Mass Extinction

2. Background Extinction

3. Human-Led Extinction

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Answer:

Fermentation is a chemical process that occurs in the cytoplasm since it is anaerobic, that is, with the absence of oxygen.

Explanation:

This anaerobic process is due to the consumption of carbohydrates in the absence of oxygen compared to intense muscular demands such as high-performance physical activity, that is why the obtaining of energy is high, since the purpose is not to anabolize but to catalyze hydrates in order to obtain the energy currency that is ATP and thus produce the contraction of the muscular sarcomero by the union of myosin with actin.

Phenotype 1: Green feathers - This phenotype has feathers that are a green color. Phenotype 2: Red feathers - This phenotype has feathers that are a red color.

The bird must be green if it appears to be green. The green hue you perceive is actually a result of light dispersion as it reflects off the feather structure. The Tyndall Effect is what causes the perception of particular colours. Pigment is also found in the feathers of parrots. The genotypes of the offspring of this hybrid can be used to predict the proportions of phenotypes. Offspring with either the BB or Bb genotype will have the purple-flower phenotype because B is dominant to b. The white-flower phenotype can only be inherited through the bb genotype.

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The net yield of the TCA (tricarboxylic acid) cycle for each acetyl-CoA molecule oxidized includes:

Three molecules of NADH: During the TCA cycle, three molecules of NADH are produced through the oxidation of NAD+ (nicotinamide adenine dinucleotide) to NADH. NADH is an energy-rich molecule that can participate in the electron transport chain to generate ATP.

One molecule of FADH2: The TCA cycle also produces one molecule of FADH2 (flavin adenine dinucleotide) by oxidizing FAD to FADH2. FADH2 is another electron carrier that can contribute to ATP production in the electron transport chain.

One molecule of GTP/ATP: In the TCA cycle, one molecule of GTP (guanosine triphosphate) is generated by substrate-level phosphorylation. GTP can be converted to ATP to provide energy for cellular processes.

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Answer: GCU  AAU  GUC

              Ala     Asn   Val

Explanation:

We have a messenger RNA sequence, and the problem is asking for the complementary amino acids for each of the three letters in the sequence.

I used the chart on the right.

GCU

Take the first letter G and then move right on the chart to find C as the second letter. Look for the third letter last where they are listed on the right side.

GCU = Ala

You will follow the same process by finding the first letter, second letter and the third letter, and then see what the amino acid for that particular three-letter sequence.

GCU = Ala

AAU = Asn

GUC = Val

GCU  AAU  GUC

Ala     Asn   Val

Answer:

out of the cell

bc water goes towards salt

Answer:

1.Measure carefully and more than once when cutting lumber to reduce waste.

2.Purchase tools that have multiple uses rather than buying many specialized tools.

4.Plant vegetation and trees on hilly areas to hold nutrient-rich soil in place.

Explanation:

Madison does the following that helps her to slow pollution:

An environment may be defined as anything that is present in the surroundings of living entities whether it involves biotic or abiotic factors.

Cutting down of lumber without measurement harm the environment as well. Therefore, it is required to measure carefully to reduce the waste.

Planting trees and vegetation always reduces the amount of carbon in that area. So, this method is most commonly used to slow pollution.

Therefore, the correct options for this question are A, B, and D.

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The arrangement of the events occurs when a stimulus in the environment stimulates a response in the nervous system as mentioned below.

A stimulus is any change in the environment, either internal or external, that can be detected by an organism and elicits a response. Stimuli can be physical, chemical, or biological in nature, and can come from a wide range of sources, including light, sound, temperature, pressure, touch, smell, taste, and other organisms.

The events that occur when a stimulus in the environment stimulates a response in the nervous system are:

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Answer:

Kristin's answer is the best.

Explanation:

It is the only correct answer.

The student that best explains whether Cell A or Cell B is a plant or animal cell is Kristin who said that "Cell A is a plant call because it has large vacuole in the middle of the cell to provide support, structure, and storage for the cell".

Cell is the structural and functional unit of the living organism which contains organelles that carry out specific functions.

The plant cells can be distinguished from an animal cell through the following features:

Therefore, the student that best explains whether Cell A or Cell B is a plant or animal cell is Kristin who said that "Cell A is a plant call because it has large vacuole in the middle of the cell to provide support, structure, and storage for the cell".

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the case of antibiotic resistance is the selective pressure exerted on bacteria due to the use of antibiotics. When antibiotics are introduced into an environment, bacteria that are susceptible to the antibiotic are killed off, bacteria that  acquired resistance the antibiotic survive and reproduce.

 Antibiotic resistance arises through various mechanisms, such as mutation, gene transfer, and selective pressure. When bacteria are exposed to antibiotics, those that have acquired a resistance mechanism are able to survive and multiply, while those that do not have the mechanism are killed off. Over time, this leads to the development and spread of antibiotic resistance in bacterial populations. the case of antibiotic resistance can also involve the impact of human activities on the environment. Overuse and misuse of antibiotics in humans and animals have led to the emergence and spread of antibiotic-resistant bacteria.

In addition, improper disposal of antibiotics can also lead to the release of antibiotics into the environment, creating a selective pressure for antibiotic resistance in bacteria. Therefore, reducing the use and disposal of antibiotics can help to reduce the environmental pressure on bacteria, leading to a decrease in the prevalence of antibiotic-resistant bacteria. the environment that influence the survival and reproduction of organisms. In the case of antibiotic resistance, the overuse and misuse of antibiotics create a selection pressure, where bacteria that develop resistance to these drugs have a higher chance of survival and reproduction. In conclusion, the environmental pressure in the case of antibiotic resistance is the overuse of antibiotics, which favors the survival and reproduction of resistant bacteria.

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The link between adenosine diphosphate (ADP) and adenosine triphosphate (ATP) is best explained by the fact that when energy is added, ADP interacts with a phosphate group to form ATP. The right Option is (c).

The mitochondria of cells are thought of as the powerhouse since ATP is produced there. As seen in the reaction below, ATP is produced when ADP reacts with an inorganic phosphate and an energy source to generate ADP;

Pi + energy + ATP + H2O = ADP + inorganic phosphate

One adenine, one sugar, and two phosphates make up the biological molecule known as adenosine diphosphate (ADP). Its most crucial function is the creation of ATP, the most vital energy molecule in living cells, when it is coupled with a phosphate molecule. An enzyme called ATP synthase produces ATP during oxidative phosphorylation. Specifically, protons travel through the protein and cause a conformational change once a proton gradient is established. ADP and inorganic phosphate are then combined by ATP synthase to form an ATP molecule.

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Correct Question:

Which statement BEST describes the relationship between adenosine diphosphate (ADP) and adenosine triphosphate (ATP)?

A. With an input of energy, ADP rearranges to become ATP.

B. Without any energy change, ADP rearranges to become ATP.

C. With an input of energy, ADP combines with a phosphate group to become ATP.

D. With a release of energy, ADP combines with a phosphate group to become ATP.

To protect and organize cells.

Answer:

B- homology

Explanation:

If you look at the definition of homology, you can see that it compares the two organisms to see what is similar about them.

Answer:

Normal hemoglobin DNA C A C G T A G A C T G A G G A C T C

Normal hemoglobin mRNA  G U G / C A U / C U G / A C U / C C U / G A G  

Normal hemoglobin AA sequence Valine-Histidine-Leucine-Threonine-Proline-Glutamic Acid

Explanation:

I hope this is right.

Every time the instructor says, "to summarize today’s lesson…" her students start packing up their notebooks. the students have learned this phrase as a discriminating stimulus.

A discriminative stimulus is the antecedent stimulus that has stimulus control over behavior because the behavior was reliably reinforced in the presence of that stimulus in the past. Stimuli and comeback are Rational by different terminology. The three stages of classical conditioning are before acquisition, acquisition, and after acquisition. Classical conditioning involves associating an involuntary response and a stimulus, while operant conditioning is about associating a voluntary behavior and a consequence.

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The correct answer is  Because bacterial ageing is believed to result from non-genetic (e.g. oxidative) damage.

Streptomycin, which produces mistranslated proteins that are more susceptible to oxidation, was found to be capable of inducing both damage and ageing in bacterial populations. There was a dose effect relating the level of damage to the concentration of streptomycin. All of the studies that did not find evidence of bacterial ageing did not use a damaging agent. However, fluorescent proteins were used as a visual marker in all studies that were successful in finding evidence. In those studies, ageing was caused by an extrinsic factor, such as the proteins themselves or the excitation light. As a result, all previous studies can be reconciled, and bacterial ageing is a real phenomenon. However, studying and observing bacterial ageing necessitates the addition of an extrinsic damage agent.

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Answer:  Chemical sedimentary rocks form by precipitation of minerals via water. Precipitation is when dissolved components come out from water. Take a glass of water, for example, and add some salt in it. In the water, salt dissolves.

Explanation:

Answer:

64

Explanation:

a. Gravity filtration involves the use of gravity to separate a solid from a liquid mixture.

b. Vacuum filtration is a technique that uses a vacuum pump to speed up the filtration process.

c. If the goal is to filter off the solid and collect the liquid, gravity filtration would be more suitable as it allows the liquid to pass through the filter paper while retaining the solid.

d. If the goal is to collect solids, vacuum filtration would be the preferred technique as it facilitates faster filtration and helps isolate the solid on the filter paper.

a. Gravity Filtration: Gravity filtration is a technique used to separate solid particles from a liquid using the force of gravity. It involves pouring the mixture to be filtered into a funnel containing a filter paper. The liquid passes through the filter paper due to gravity, leaving the solid particles behind.

b. Vacuum Filtration: Vacuum filtration is a technique used to separate solid particles from a liquid using a vacuum pump to create a pressure difference. It involves setting up a Büchner funnel or a Hirsch funnel connected to a vacuum source.

The vacuum applied accelerates the filtration process by pulling the liquid through the filter paper, while the solid particles are retained on the filter paper.

c. To filter off solids and collect the liquid, the vacuum filtration technique is more suitable as it provides faster and more efficient filtration by applying a pressure difference.

d. To collect solids, the gravity filtration technique is used as it allows the solid particles to be retained on the filter paper while the liquid passes through.

4. Observations: During gravity filtration, the filtrate passed through the filter paper, leaving behind the solid particles on the filter paper. The filtrate appeared clear and free of solid impurities. When the solution was cooled, there might have been crystallization or precipitation of the dissolved substance.

During vacuum filtration, a solid residue may have been collected on the filter paper. The color of the isolated solid would depend on the nature of the substance being filtered, and it could vary from colorless to various shades depending on the compound.

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The nucleotide units that represent a specific amino acid in protein synthesis are called codons.

A codon is a sequence of three nucleotides (adenine, guanine, cytosine, or uracil) that corresponds to a specific amino acid or a stop signal during protein synthesis. The sequence of codons determines the order of amino acids in a protein.

Codons are like the "words" in the language of DNA. Each codon corresponds to a specific amino acid or a stop signal. There are 64 possible codons, but only 20 amino acids are used in protein synthesis. This means that some amino acids can be encoded by multiple codons, while some codons are redundant and do not code for any amino acid. The order of codons determines the order of amino acids in a protein, which ultimately determines the structure and function of the protein.

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Answer:

Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis — the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

Explanation:

Molecule gets translated into a protein by the ribosome within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

Full form of RNA has ribonucleic acid and it has a nucleic acid which has been found in almost all cells that are living and RNA has mostly similar to DNA but there is one difference between RNA and DNA and the difference is that RNA has single stranded but DNA is double stranded.

The RNA has backbone has made up of the phosphate group which has arranged in alternating form and the sugar known as ribose other than the deoxyribose  present in DNA. There are four bases found in RNA and these are adenine, uracil, guanine, and cytosine.

The main function of mRNA is it work as imedieter between protein and DNA which is utilised by ribosome for the process of direct synthesis of protein, and the function of tRNA is to carry the accurate amino acid to the proteins synthesis site which takes place in ribosome.

Therefore, Molecule gets translated into a protein by the ribosome within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis the stitching together of amino acids to make a protein molecule.

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Gamma rays are the most energetic, have the shortest wavelengths, and have the highest frequencies.

Radiofrequency (RF) radiation is at the low-energy end of the electromagnetic spectrum and comprises radio waves and microwaves. It is classified as non-ionizing radiation. Non-ionizing radiation lacks the energy required to remove electrons from an atom.

Radio waves have low-energy photons, microwave photons have somewhat more energy than radio waves, infrared photons have even more, then visible, ultraviolet, X-rays, and, finally, gamma-rays.

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Answer:

The five piece of lab equipment that we will use are

1. Preserved frog specimen

They are safe to use and are not subject to hazardous materials regulations or disposal restrictions.

2. Dissection tray

They are essential when analyzing internal structures and component related functions. Compatible with lining waxes used to provide unadulterated dissecting pin surfaces or including odor absorbent pads, pans allow animals to be securely held in place.

3. Scalpel

They are used to make cuts into the body. This is a very sharp instrument and comes in various sizes for different types of cuts and surgeries. Most blades are made of either carbon or stainless steel.

4. Dissecting scissors

They are used for fine dessection ,making incisions, cutting apart tissues and removing different organs.

5. Forceps

They are used to handle tissues and other materials and also to manipulate needles and other instruments whilst operating. They are commonly used for grasping fine tissue and blood vessels or soft tissue dissection.