Suppose that there was an enzyme that cuts bonds between deoxyribose and phosphate groups. what would this enzyme do to a dna molecule?

Answer:

A,B,AB blood types are possible

Mutations that lead to protein disruption will produce defective proteins by affecting the first level (amino acid sequence). Defective proteins are non-functional.

A mutation is any alteration in the nucleotide sequence of the genome (i.e., the genetic material) of an organism.

Mutations in genes may lead to the generation of different types of proteins that encode for different amino acids.

The first level of protein structure is the amino acid sequence, thereby mutations may affect this level.

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Japanese ragweed is evolving back toward greater investments in defense and reduced investment in growth as a result of selection by herbivore from beetles

Most beetles are herbivores and eat only plants. This includes roots, stems, leaves, seeds, nectar, fruit, or the tree of the plant itself.

In addition, half of all insects (401,000 species) are herbivorous and thus consume plants (Grimaldi and Engel 2005). One of the long standing questions in the field of ecology and evolution is: Why are there so many herbivorous insects on Earth?

It is estimated that about half of all living insects are herbivores. Some large groups of insects are almost exclusively herbivores. These include moths and butterflies, weevils, leaf beetles, wasps, leaf miners, and plant worms.

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Answer:

C.

Explanation:

The digestive system allows our body to break down the foods we eat, so that we can get the nutrients from it!

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The cell theory was first proposed by Schwann and Schleiden, then modified by Virchow, and, with time, completed by several researchers to get to the modern version. 1) 1- The cell is the structural and physiological unit of living beings. 2- The cell is the most basic independent unit of life. 3- Cells transmit genetic material during cell division to daughter cells. 2) 1-  Cells are the basic units of reproduction, they originate by division of pre-existing cells. 2- All living organisms are made up of cells. 3- The chemical composition is basically the same in all cells.

The cell theory was first proposed by Schwann and Schleiden around 1830. After a few years, Virchow rejected the third state of Schwann and Schleiden’s ideas about spontaneous generations, and proposed that cells were the product of other pre-existing cells and originated by cellular division.

Currently, the cell theory states that

And the modern version of the theory adds a few more aspects,

1) 3 parts of the cell theory:

1- The cell is the structural and physiological unit of living beings.

2- The cell is the most basic independent unit of life.

3- Cells transmit genetic material during cell division to daughter cells

2) Identify the part of the cell theory represented by the images below.

1-  Cells are the basic units of reproduction, they originate by division of pre-existing cells.

2- All living organisms are made up of cells.

3- The chemical composition is basically the same in all cells.

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Fungi reproduces through a reproductive cell that's able to produce another individual without fusing with another cell. This cell can be spreaded to spread the individuals too. The name of this cell is spore, therefore the correct answer is A. spores.

The given statement "Of the bacteria used in e. coli would have the highest thermal death point" is false.

Of the bacteria used in the question (Staphylococcus epidermidis, Escherichia coli, and Bacillus subtilis), E. coli would not have the highest thermal death point.

Bacillus subtilis, a spore-forming bacterium, generally has a higher thermal death point due to its ability to produce endospores that are more resistant to heat.

Endospores are formed by certain bacteria, including Bacillus subtilis, as a survival mechanism when faced with unfavorable conditions such as nutrient depletion or extreme temperatures.

These endospores are highly resistant to heat, radiation, and various chemicals, allowing the bacterium to survive in harsh environments. When conditions become favorable again, the endospore can germinate and give rise to a new vegetative cell.

Escherichia coli, on the other hand, is not a spore-forming bacterium and generally has a lower thermal tolerance compared to Bacillus subtilis.

While the exact thermal death points can vary depending on the specific strain and environmental factors, it is more likely that Bacillus subtilis would have a higher thermal death point than Escherichia coli.

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Answer for anyone who may still need it: B. It generates a voltage across the membrane as a way to store energy.

According to the research, the correct option is nucleus. The part of the cell where ribosomes perform protein synthesis is in the nucleus.

It is a membranous structure that is located both in the plant cell and in the animal cell that houses most of the material belonging to genetics.

In this sense, it exerts control over the activities of cells and to preserve the integrity of genes, DNA molecules, proteins and ribosomes are organized in it, which will serve for protein synthesis.

Therefore, we can conclude that according to the research, the correct option is nucleus. The part of the cell where ribosomes perform protein synthesis is in the nucleus.

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The frequency of allele A is 0.55.

To calculate the frequency of allele A, we first need to determine the number of copies of allele A in the population. Since each individual has two copies of the gene, we can calculate the number of copies of allele A by multiplying the frequency of the Aa genotype by 1 (since one of the alleles in this genotype is A) and adding it to the frequency of the AA genotype multiplied by 2 (since both alleles in this genotype are A).

So, the number of copies of allele A = (2 x 120) + 400 = 640

Then, we can calculate the frequency of allele A by dividing the number of copies of allele A by the total number of alleles in the population, which is 2 x 500 = 1000. So, the frequency of allele A = 640/1000 = 0.64.

However, since the question asks for the frequency of allele A specifically (not Aa or aa), we need to divide this frequency by 2 (since each individual has 2 alleles) to get the frequency of allele A in the population. So, the frequency of allele A = 0.64/2 = 0.55.

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Electrophysiological recordings are another name for recordings of big-scale electric cues from the shy plan, such as electroencephalography. They are useful for monitoring and electrodiagnosis.

Compare the state listed below to the electrophysiological data.

1. Eye movement is shown by EOG, muscle contractions by EMG, and high-frequency, low-amplitude waves by EEG.

3. EOG demonstrates eyes are fixed, EMG shows muscles are loose, EEG shows low recurrence, high abundancy waves

2. EOG demonstrates eyes are moving, EMG shows muscles are deadened, EEG shows high recurrence, low abundancy waves

4. EOG demonstrates eyes are fixed, EMG shows muscles are loose, and EEG shows rest axles.

Electroencephalograms (EEGs), electrocardiograms (ECGs), transepithelial recording, multielectrode arrays, single- and multiunit extracellular recording, impedance measurements, current-clamp, voltage-clamp, patch-clamp, and lipid bilayer recording are among these methods.

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Q- A young man named Rip Van Winkle is in your sleep lab. It is your job to monitor his sleep activity during the night. Unfortunately, the low-light monitor that allows you to watch him sleep is broken so you have to determine his sleep state based on what you see in his EEG, EMG, and EOG records. Match the state below with the electrophysiological records.

1. Awake

2. REM sleep

3. Deep sleep

4. Stage 2 sleep

Explanation:

a it is not double stranded

DNA is the deoxyribonucleic acid. It is the genetic material in many higher organisms. It is double-stranded in nature. It contains various nitrogenous bases which are held together through hydrogen bonds. Thus, the correct option is C.

DNA is the main genetic material in cell. It is known as deoxyribonucleic acid. It is a polymer made up of nucleotides. In higher organisms, the DNA is found in the form of double-stranded chains. Both the strands are held together through nucleotide bases.

Nucleotide bases are made up of nitrogenous bases, sugar, and phosphate backbones. Nitrogenous bases present in DNA include Purines are Adenine and Guanine while Pyrimidines are Thymine, Cytosine. The nitrogenous bases are held together by hydrogen bonds between purine and pyrimidine.

The sugar present in DNA is the deoxyribose sugar.

Therefore, the correct option is C.

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The structure that is most likely used for reproduction is the seed. So the correct option is A.

In the life cycle of a plant, the seed represents the embryonic stage. Seeds have three main parts. These are endosperm, embryo and seed coat.

The embryo is a very tiny plant and has a root and a stem and one or two leaves. The endosperm provides nutrition to the growing embryo. The nutrients are a combination of oil, starch and proteins.

Seeds are important features of a category of plants called spermatophytes. The word spermatophyte means seed-producing plants. These plants are divided into two categories.

Thus, the structure that is most likely used for reproduction is the seed.

Therefore the correct option is A.

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:

The reflection and rectilinear propagation of light helps in the formation of shadows. The property that light neither can pass through an opaque object nor can bend to a large extent by itself leads to shadow formation.

Explanation:

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Answer:

Option B on edge 2020

Explanation:

The correct statement that relates the interaction between the biosphere and atmosphere during photosynthesis is ; ( B )

Photosynthesis is process whereby plants and algae ( green ) make use of sunlight and water in the presence of carbon dioxide obtained from the atmosphere to create their food while giving out oxygen back to the atmosphere.

Energy stored/created in plants are not released to animals through the air but  Carbon dioxide present in the atmosphere is take into the biosphere by plants during photosynthesis.

Hence we can conclude that During photosynthesis plants take in carbon dioxide from the air .

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A macrophage destroys a pathogen by phagocytosis. The correct answer is (d).

Macrophages are a type of white blood cell that engulf and destroy foreign particles, such as bacteria, viruses, and dead cells. They do this by extending their cell membrane around the particle and forming a vesicle called a phagosome.

The phagosome then fuses with a lysosome, which contains digestive enzymes that break down the particle. The macrophage then releases the digested material back into the bloodstream.

Antibodies are proteins that bind to specific antigens, which are molecules found on the surface of pathogens. Antibodies can help to destroy pathogens by marking them for destruction by other immune cells, such as macrophages. However, antibodies are not produced by macrophages.

Antigens are molecules that are found on the surface of pathogens. They can be recognized by the immune system, which then produces antibodies to bind to them. However, antigens are not produced by macrophages.

Histamine is a chemical that is released by mast cells and basophils, which are other types of white blood cells. Histamine can cause inflammation, which is a response to infection or injury. However, histamine is not produced by macrophages.

Therefore, the correct option is D, phagocytosis.

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Pancreas releases insulin to control blood glucose levels.

Pancreas is a glandular organ situated in the abdominal cavity behind the stomach. It has an endocrine function and an exocrine function. The endocrine function is carried out by the islets of Langerhans, which are responsible for the production and secretion of hormones such as insulin and glucagon. The exocrine function of the pancreas is to produce and secrete digestive enzymes into the small intestine.Insulin is a hormone that is produced by the beta cells of the islets of Langerhans in the pancreas. Insulin is responsible for regulating blood glucose levels by increasing the uptake of glucose by cells and tissues such as muscle, liver, and adipose tissue. Insulin also promotes the storage of glucose in the liver and muscle as glycogen and inhibits the breakdown of glycogen into glucose. When blood glucose levels are high, the pancreas secretes insulin into the bloodstream to bring glucose levels back to normal.

Thus, the pancreas releases insulin to control blood glucose levels.

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Answer:

Flagella and contractile vacuoles

A vaccine is a medical material that mimics the pathogen, but in a harmless way. When our body's immune fights it off, it remembers how to fight the real pathogen when it enters our body. So, it protects us from diseases.

Answer:

A vaccination is a medical substance that mimics a pathogen in a non-harmful way. When our immune system defeats it, it recalls how to combat the genuine infection when it enters our system. As a result, it shields us against sickness.

Explanation:

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Answer: i dont understand it....

Explanation:

Answer:

Female Rr

Explanation:

The circle indicates a female and since its colored it can either be RR or Rr.

Answer:

i have a pusheen popsocket

Explanation:

i dunno i like pusheen and wanted to answer lol

Answer: The question is incomplete as the options are not given but the options is gotten from another websites.

1 .As bike tires roll across the sidewalk, friction is created and they become warmer.

2. Solar energy from the sun is absorbed by solar panels, which transforms to chemical energy when it is used as electricity.

3. As food is digested, molecule bonds are broken, allowing new molecules to form that can be used by our bodies.

4. Energy stored in organic fuels are used for heat and electricity/ When batteries are connected to a circuit, a reaction occurs inside the cell producing electrical energy.

5. Thermal energy causes energy stored in fireworks to convert to kinetic, light, and sound energy.

The correct options are 3 and 4.

3. As food is digested, molecule bonds are broken, allowing new molecules to form that can be used by our bodies.

4. Energy stored in organic fuels are used for heat and electricity/ When batteries are connected to a circuit, a reaction occurs inside the cell producing electrical energy.

Explanation:

Chemical energy is stored in food but when the food is broken down into smaller pieces or nutrients by the process of digestion, chemical energy are released which is use to drive different body functions or mechanisms.

Chemical energy are stored in circuits. When these circuits are connected to battery, the chemical energy are released and these energy are then converted to electrical energy to produce heat or light .

The given statement "postsynaptic cells, in turn, add receptors from their membranes to make it less difficult to stimulate the cell and cause an action potential" is False because Postsynaptic cells do not add receptors from their membranes to make it less difficult to stimulate the cell and cause an action potential. In fact, the process is usually the opposite.

Postsynaptic cells, which receive signals from presynaptic cells at chemical synapses, contain receptors on their membranes that specifically bind with neurotransmitter molecules released by the presynaptic cell. These receptors are proteins that are already present in the postsynaptic cell membrane and are not added or removed based on the difficulty of stimulating the cell.

When neurotransmitters bind to their specific receptors on the postsynaptic cell, it can either excite or inhibit the postsynaptic cell's activity. Excitatory neurotransmitters can depolarize the postsynaptic membrane, making it more likely to generate an action potential, while inhibitory neurotransmitters can hyperpolarize the membrane, making it less likely to generate an action potential.

The number and sensitivity of receptors on the postsynaptic cell membrane can be dynamically regulated through processes like long-term potentiation or long-term depression, which can affect the strength of synaptic connections over time. However, these processes are not directly related to the difficulty of stimulating the cell but rather to the strength and efficacy of synaptic transmission.

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The frogs genetic variation of their offspring is incredible.

The process begins when adult frogs deposit hundreds of small eggs, known as frogspawn, that collect together in clusters. Early in the spring, as the temperature is just beginning to warm up, this occurs.

Tadpoles won't move around much for the first week or two after hatching since they are still taking nutrition from the yolk of their egg. But once the yolk is completely consumed, the tadpoles are large and robust enough to enter their aquatic environment.

Frogs and toads depend on water significantly less as adults. They can live on land as long as they stay in the shade and don't dry up, but they frequently go back to ponds and lakes for a splash.

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Answer:

The size of the pot as that the only variable that changes

Explanation:

Answer:

g. mitosis

Explanation:

mitosis is when cells divide