What characteristics do viruses not have?

They are capable of photosynthesis due to presence of chloroplast. Therefore, option (B) is correct.

The unicellular creature euglena has a sophisticated internal structure that includes a red "eyespot," a contractile vacuole that has the ability to eject water, and other organelles. Chloroplasts are found in photosynthetic organisms. They have two flagella—one long and one short—each of which may move the creatures.

It is the most researched member of the phylum Euglenophyta/ Euglenozoa and belongs to the Kingdom Protista. It may be discovered in peaceful puddles, ponds, and even swimming pools that contain freshwater. A number of animals have breathing vesicles that keep them from drying up. The Euglena is one of a kind since it is both heterotrophic (meaning it needs to ingest food) and autotrophic (meaning it can live without it) (can make its own food).

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The snail is equipped with a spiral-shaped shell that works as armor in any dangerous condition. The entire soft body of the snail moves inside the shell.

The snails come under the gastropods family of Mollusca. They lack a backbone ( invertebrates). The major portion of snails is the head, neck, visceral hump, tail, and foot. The radula serves as the molluscan tongue. The entire organ system is enveloped in an external shell. Snail move on the ground with the help of the muscular feet. The snails have both male and female gender. The external shell is made from the secretion of the mantle of the snail.

Hence, external shell is amusing feature of snail among other organism.

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The endoplasmic reticulum (ER) is an organelle that plays crucial roles in a number of cellular activities, including as protein secretion, lipid production, and intracellular calcium homeostasis which are necessary for cell survival and regular physiological operations. The cell cannot exist without the endoplasmic reticulum.

Endoplasmic reticulum is the network of tubes and sac-like structures in a cell's cytoplasm, which resembles gel. The endoplasmic reticulum transports chemicals and proteins. The endoplasmic reticulum's outside surface can be either smooth or rough. The rough endoplasmic reticulum produces the necessary proteins for the cell and has several ribosomes on its surface. Other compounds that the cell requires, such as lipids (fats) and carbohydrates, are produced by the smooth endoplasmic reticulum (sugars). A cell organelle is the endoplasmic reticulum.

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Answer: The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine.

Explanation:

The functions of the mammalian kidney are water retention, filtration of blood, excretion of nitrogenous waste, regulation of salt balance in the blood, and production of urea. The correct options are a, b, c, d, and e.

In vertebrates, the kidneys are two reddish-brown, bean-shaped organs. The nitrogenous wastes, such as urea, salt, and extra water, are removed from the blood by the kidneys, which then excrete them as urine. Wastes and extra fluid are removed from your body by your kidneys.

Additionally, your kidneys eliminate acid that is created by your body's cells and keep the levels of water, salts, and minerals in your blood—such as sodium, calcium, phosphorus, and potassium—in a healthy range.

Therefore, the correct options are

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The question is incomplete. Your most probably complete question is given below:

water retention

filtration of blood

excretion of nitrogenous waste

regulation of salt balance in the blood

production of urea

The Climatic, Economic, Physical, and Traditional Factors other are the settlement in Western Europe.

In order to higher categorize which elements in the long run have an effect on agreement, geographers have usually typical 4 umbrella phrases to explain those elements: climatic, economic, physical, and traditionalThe 4 foremost sorts of settlements are urban, rural, compact, and dispersed.

Urban settlements are densely populated and are generally non-agricultural. They are referred to as towns or metropolises and are the maximum populated form of agreement. These settlements absorb the maximum land, resources, and services.The 3 foremost styles of agreement are linear, scattered, and clustered.

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The phenotypes are possible with 3 genes qre the 6 alleles formed from the phenotype.

An excellent example of the inheritance of multiple alleles is the human blood type. Blood types exist in four possible phenotypes.

A, B, AB, O. The gene that determines blood type has three alleles.

You only have 2 out of 3 genotypes --- one from your mom and one from your dad). Genotyping is the assessment of variants present at a particular site (locus) in the genome. It can be represented by a symbol. For example, BB, Bb, bb can be used to represent specific variants of a gene.

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Answer:

To see the spectrum of light given off by a firefly, you could use a spectrometer. This is a tool that separates light into its different wavelengths, allowing you to see the intensity of the light at each wavelength. To use a spectrometer to see a firefly's light spectrum, you would need to capture the light given off by the firefly and shine it through the spectrometer.

The spectrum of a firefly's light would show a peak intensity at the wavelengths that correspond to the green color of the light. This tells us that the firefly's light is primarily made up of green light. The spectrum can also be used to compare the wavelengths of the light given off by the firefly to the wavelengths of other sources of light. For example, you could compare the spectrum of the firefly's light to the spectrum of light from a candle flame or a lightbulb to see how the wavelengths of the light from the firefly compare.

The apex of a firefly's light's spectrum would appear at wavelengths where the light is the color green. This indicates that green light makes up the majority of the firefly's brightness. The spectrum can be used to compare the wavelengths of the firefly's light to the wavelengths of light coming from other sources.

A spectrometer could be used to view the firefly's light spectrum. This device divides light into its various wavelengths so that you can observe the strength of the light at each one. You would need to collect the light emitted by the firefly and shine it through the spectrometer in order to use a spectrometer to view the light spectrum of a firefly.

Therefore, To examine how the wavelengths of the light from the firefly compare, you may, for instance, look at the spectrum of its light in comparison compared to the color spectrum produced by a candle flame or a lamp.

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According to Claire's diagnostic, her small intestine either lacks or just contains a very little amount of proteolytic enzymes.

According to Claire's diagnosis, the lack of or decline in proteolytic enzymes in the small intestine may be the cause of the sluggish protein digestion. For the protein digestion process to be quick, as a digestion process by enzymes must be, these enzymes must be present in the small intestine in amounts that are acceptable. This is because a shortage of enzymes causes the metabolic processes to slow down because enzymes are in charge of accelerating them.

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Increasing corticotropin-releasing factor levels will likely increase adrenocorticotropic hormone levels.

The tiny gland located near the base of the brain known as the pituitary produces the hormone ACTH. One other hormone, cortisol, is produced under the influence of ACTH. The two tiny glands called the adrenal glands, which are situated above the kidneys, produce cortisol.

Adrenocorticotropic hormone stimulates the release of cortisol from your adrenal glands as its primary purpose. A vital hormone, cortisol has an impact on practically all of the organs and tissues in your body.

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Blue-green algae, bacteria, and mycoplasma are prokaryotes. Bacteria are the most prevalent and fastest-growing prokaryotes.

Unlike prokaryotic cells, eukaryotic cells contain interior cellular bodies. Prokaryotes include different forms of bacteria and archaea. Eukaryotes include protists, fungi, plants, and mammals (everything except prokaryotes).

These single-celled organisms are present across the entire planet, from the dirt to human tissue. They differ in their architecture and shapes. The element of the cell wall that gives it structure is called peptiddoglycan. A few of the distinguishing features of bacteria are pili, flagella, and capsules.

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The peat bed is approximately 4,429 years old.

The age of the peat bed can be calculated using the following formula:

Age = t * ln(R_0/R)

Where:

Plugging these values into the formula gives us:

Age = 5,730 years * ln(0.01/0.006)

Age = 5,730 years * 0.778

Age = 4,429 years

This method of dating, known as radiocarbon dating, is based on the fact that carbon-14 is continuously replaced in living organisms, but once an organism dies, the amount of carbon-14 in it decreases continuously as it decays to nitrogen-14. By measuring the ratio of carbon-14 to carbon-12 in a sample, it is possible to determine how long it has been since the organism died, assuming that the global amount of radiocarbon is constant.

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Answer: for 4 tomato plants their are 120 pea seedlings and it is calculated by multiplying the seedlings  between plants spacing  and within the spacing between the rows and detailed explanation is given below.

Explanation:

Add up the total number of row feet you have available for the crop , if you have two,5 foot rows available for peas ,their are total 10 row feet to fill .if at this point it is usually easiest to convert the number of feet to inches ,since most seed and plant recommendations are in inch spacing . then take the total number  of inches available for the crop and divided by the row crop spacing  for instance ,120 in divided by 1  ,per pea seed equals 120 pea seeds.96 divided by 24m per tomato plant equals 4tomato plants.

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A condition when the coronary arteries are blocked thus preventing oxygenated blood from circulating within the heart is called chronic total occlusion (CTO).

A chronic total occlusion (CTO) is a blockage in your coronary corridors, the veins that supply blood to your heart. Plaque, a fatty substance that builds up and narrows your arteries, typically causes blockage. If you have coronary artery disease, your risk of developing a CTO is higher.

Coronary artery disease (CAD) patients are more likely to experience chronic total occlusions. One in three people who suffer from CAD also has a CTO. A common heart condition is coronary artery disease. Coronary arteries, the major blood vessels that supply the heart, struggle to deliver sufficient blood, oxygen, and nutrients to the heart muscle.

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You may do each set with the maximum amount of muscular force feasible when you have a full recovery, which results in the most absolute strength gains.

Another benefit of this rest period is that it seems to boost testosterone levels in seasoned strength athletes who use exercises that target vast muscle groups into their training when combined with heavy training loads. Greater strength gains are correlated with higher testosterone levels.

The complete weight that your body is capable of lifting is your absolute strength. People often equate this with strength. The ability to exert the most power in relation to your bodyweight is referred to as relative strength.

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Answer:

d,becouse the researchers do not expect to find any thing.

Answer:

sister chromatids

Explanation:

Cellular respiration, by producing CO2, reduces the observed rate of photosynthesis. As a result, the observed rate of photosynthesis is less than the actual rate.

The rate at which carbon is absorbed into carbohydrate in the light-independent process increases as the carbon dioxide concentration rises, and hence the rate of photosynthesis normally rises until it is restricted by another factor.

Photosynthesis is the process by which carbon dioxide and water are converted into oxygen and glucose. The plant consumes glucose as food and produces oxygen as a byproduct. Cellular respiration is the process through which oxygen and glucose are converted into water and carbon dioxide. Water and carbon dioxide are byproducts of the process, while ATP is the energy that is produced.

A low CO2 concentration has two effects: it reduces photosynthesis and lowers the light saturation threshold. (The light saturation point is the point at which further increases in light do not improve photosynthesis.)

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The formula for calculating the height of the liquid raised or decreased in a capillary tube is h=2Scosθρgr where height of the liquid is denoted as h, surface tension of the liquid is s and r is the radius of the tube and ρ is the density of liquid.

Capillary tubes are narrow cylindrical tubes with very small diameters. If these tubes are dipped in a liquid then the height of the liquid will either rise or decrease. Such a phenomenon is known as capillarity. The formula to compute the height of the liquid raised or decreased is known as a capillarity formula. The formula has been calculated by analysing all the forces applied on the liquid. Considering the force of attraction between the surface of the capillary tube and the molecules of the liquid, it develops a shape. The angle created by the edge of the liquid with the vertical tube plane is known as contact angle which is denoted by θ.

It can be formulated as h=2Scosθρgr.

In the above formula, height of the liquid is denoted as h, surface tension of the liquid is s and r is the radius of the tube and ρ is the density of liquid.

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In genetics, homozygous means having inherited the same versions (alleles) of a genomic marker from both biological parents. As a result, a person who is homozygous for a genetic marker has two identical copies of that marker.

Each allele pair indicates the genotype of a single gene. Homozygous genotypes have two identical alleles at a certain locus, while heterozygous genotypes have two different alleles.

Synapsis. The pairing of two homologous chromosomes that occurs during meiosis is known as synapsis. This occurs during the prophase of meiosis I.

When homologous chromosomes pair, the homologous chromosomes cross across and exchange genetic material at certain places. This is known as crossing over.

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Yes, cystic fibrosis caused by deletion mutation.

A deletion mutation occurs when a wrinkle forms on the DNA template strand and subsequently causes a nucleotide to be omitted from the replicated strand.

It is a type of frameshift mutation characterized by the loss of one or more nucleotides from the segment of DNA. Example of deletion mutation is DiGeorge syndrome.

Deletions occur when there is homologous but unequal recombination between gene sequences. Similar sequences in the human genome can cross over during mitosis or meiosis, resulting in a shortened portion of the gene sequence.

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Phenotypic ratios 1)1:0 yellow : green 2) 1:0 green : yellow 3) 1:1 4) 1:0 smooth constricted 5) 3:1 tall : short 6) 1:0 Axial : terminal 7) 1:0 grey : white 8)0:1 tall : short

Phenotypic ratios are quantitative relationships between phenotypes that illustrate how frequently one phenotype is correlated with another. Researchers utilise the phenotypic ratio derived from a test cross to determine the gene expression for generations of an organism. The ratio of various phenotypes that are present in the progeny of a cross is known as the phenotypic ratio. Ratios are comparisons in numbers. The ratio of apples to oranges, for instance, would be 3:2 if someone possessed three apples and two oranges. It is projected that a cross between two heterozygous F1 hybrids will result in offspring with a 1:2:1 ratio of genotypes to phenotypes for that trait.

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Answer:

sex cells, diploid

The two adaptations of gas exchange are: 1. Both capillaries and alveoli have walls that are made of a single cell. 2. Because of the alveoli's abundant blood supply and improved gas exchange.

O2 and CO2 diffuse from the alveoli into the blood and from the blood into the alveoli, respectively, in a process known as simple diffusion. A gradient in concentration is needed for diffusion.

As a result, a higher concentration (or pressure) of oxygen in the alveoli is required than in the blood, whereas a lower concentration (or pressure) of carbon dioxide is required. Breathing naturally assists us in this by constantly bringing in new air that is high in oxygen and low in carbon dioxide.e.

Our respiratory system is what causes us to breathe. The lungs, which are its main organ, are where oxygen (the air we breathe in) and carbon dioxide (the air we breathe out) are exchanged. Without this system, our body wouldn't be able to get the oxygen it needs to survive.

The body's main purpose is to get oxygen for the cells to consume and to get rid of the carbon dioxide that the cells make. includes the lungs themselves as well as the respiratory airways leading into (and out of) the lungs.

Air travels through the following structures in this order: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange).

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According to hardy-weinberg equilibrium, 12,000 persons should be heterozygous for this gene.

In relation to allele frequency, p, expected heterozygosity (Hexp = 2pq) for a 2-allele system is shown. The heterozygosity reaches its apex at a value of 0.5 when the allele frequencies are equal (p=q). At both ends, it is negligible because everyone is a homozygote of one type or the other.

The proportion of heterozygous people is equivalent to 2pq. In this instance, 2pq is 0.32, which indicates that 32% of people are heterozygous for this gene (2 (0.8)(0.2) = 0.32).

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The specific purpose of meiosis 1 is to reduce the chromosome number by half in order to produce haploid reproductive cells from a diploid cell.

What is a Diploid cell?

A diploid cell is a cell that contains two sets of chromosomes, one set inherited from each parent. Diploid cells are the basic structural unit of life for all living organisms. These cells are responsible for growth, repair, and reproduction.

What is meiosis 1?

Meiosis 1 is the first part of meiosis, a type of cell division that produces gametes (sex cells) for sexual reproduction. Meiosis 1 consists of two successive divisions of the cell's nucleus, resulting in four daughter cells with half the number of chromosomes as the original cell. During meiosis 1, homologous chromosomes pair up and exchange genetic material, a process known as crossing over. The resulting cells are haploid, meaning they contain only one copy of each chromosome.

This process involves the separation of homologous chromosomes, which are pairs of chromosomes that contain the same genes.

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It is possible the emergence of a frameshift mutation that does not affect the structure of a protein, but it will invariably modify its structure.

Happy Holidays!!

Answer:fqwfee

Explanation:fqqfewfqrqf

Capillaries are about 5-10 micrometers in diameter.

             1 micrometer = 10-6m = 10-3mm

A capillary is a small blood vessel. They are the smallest blood vessels in the body which convey blood between arterioles and venules.  

There are 10 billion capillaries in the human body. The average length of capillary is based on certain measurements is about 0.23mm. Capillaries are delicate blood vessels, and they transport nutrients, blood and oxygen to cells in your organs and body system. The smallest blood vessels in human vascular system are capillaries. Capillaries are often referred to as micro circulation and they deliver oxygen and nutrients to all cells in the body and eliminate carbon dioxide. Generally, capillaries are of two types viz.

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Answer:

its correct option is A)Nucleus

Explanation:

How do controls improve an experiment?

Not only do controls establish a baseline that the results of an experiment can be compared to, they also allow researchers to correct for possible errors. If something goes wrong in the experiment, a scientist can check on the controls of the experiment to see if the error had to do with the controls.

In your case your anwser:  B. by allowing for the experiment to test as many variables as possible

I hope this helped and Merry Christmas!