a cell that responds to a signal molecule is distinguished from a cell that does not respond by the fact that it has

Answer:

The radioactive decay causes emission of radiation. Unstable isotopes have a high number of neutrons or protons in their nuclei.

Answer:

Species are as specific as you can get. It is the lowest and most strict level of classification of living things. The main criterion for an organism to be placed in a particular species is the ability to breed with other organisms of that same species.

Answer:

2/4 = 50%......is correct answer.........

Answer:

trophoblast

Explanation:

Respuesta: Energía eólica.

Explicación: La energía eólica o las cosas que utilizan energía eólica, como las turbinas eólicas, no liberan emisiones que puedan contaminar el aire o el agua. Por tanto, una fuente de energía no contaminante.

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c. HOX genes are exclusively activated in the thorax because they create transcription factors that control the genes for wings.

A Hox mutation in the fruit fly Drosophila can result in significant modifications, such as the addition of additional wings or the development of legs from the fly's head in place of antennae.Fruit flies are initially built up of repeating units, or segments, that resemble worms. Early in development, hox genes are activated in a number of segments.

An very evolutionarily conserved gene family is the hox genes. In bilateral species, they set the anterior-posterior body axis and control how cells grow.

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Natural selection does not produce the mutations that are in option A, as natural selection is the process by which certain advantageous traits become more common in a population over time because individuals with those traits are more likely to survive and reproduce.

Natural selection does not produce the mutations themselves. Mutations are random changes that occur in an organism's DNA and can happen for various reasons, such as exposure to radiation or mistakes during DNA replication. Natural selection acts on the variation already present in a population, selecting for traits that confer advantages in a given environment and allowing those traits to become more prevalent over time.

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Answer:

The lipid bilayer is hydrophobic that is hydrophobic and it can easily cross the lipid bilayer.

Toulene is a hydrophobic and neutral molecule compound so it can easily pass through the bilayer. It is an aromatic compound with a methane group attached to the benzene ring. It is smaller in comparison to Phenylalanine.

Phenylalanine-- It is an amino acid with a benzene ring attached to it. This amino acid is less hydrophobic than the aliphatic amino acids. Because of its less hydrophobic nature, it travels slowly compared to Toluene. It is also larger and has amino and carboxyl groups attached to it. On the other hand, Phenylalanine is a polar compound which has -COOH and -NH2 group. which prevents its delay in its transport across the lipid bilayer.

Answer:

C

Explanation:

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Tiger (Panthera tigris) and lion (Panthera leo) are the most closely related species among the other feline species.

Feline species refer to various types of cats or other members of Felidae family. This family includes both big cats as well as small cats, such as domestic cat and large tiger both come under this family.  A total number of 40 species of felines are known today, where they are distributed in various habitats around the world.

Some common examples of feline species include the lion, leopard, jaguar, domestic cat, etc. Each feline species has their own unique characteristics that allow them to survive under their respective habitats.

The two feline species that are most closely related in the given list are tiger (Panthera tigris) and the lion (Panthera leo). They both belong to Panthera genus within the Felidae family. The other feline species are not closely related as the tiger and the lion.

Therefore, tiger (Panthera tigris) and the lion (Panthera leo) are the most closely related species.

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This statement is true about specis preservation.

The conservation of species of to in their natural habitat or the  natural ecosystem is known  as the in-situ conservation.

The Kirtland’s warbler, a small songbird that nests by the  only in the young jack of pine to  forests of Michigan, Wisconsin and Ontario, was one of the very first animals by the  placed on the U.S. list of endangered species. But now it has recovered enough to come off that list, the U.S. Fish and Wildlife by to  Service (FWS)

Historically, wildfires were to   the most important factor and it is  for establishing the natural jack pine forests that is  Kirtland’s warblers need to be breeding habitat. Modern wildfire suppression in the  greatly diminished the natural disturbance that once generated Kirtland’s and it is  warbler breeding in  habitat. In the absence of wildfire, land managers had to take an active role in mimicking natural processes that regularly occurred within the jack pine is  ecosystem. This is primarily done through large-scale timber harvesting and human-assisted reforestation.

The warblers are also threatened by brown-headed cowbirds, which conservation groups work with the Forest.

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The statement best explains why water flows from point A to point B is The temperature at A is more than a B.

Thus option "C" is correct.

Thermohaline circulation is the circulation in oceans which are driven by differences in density. The word thermohaline means thermo-temperature and haline-salinity.

The differences in the temperature difference arise from heating and cooling at the ocean surface, freshwater fluxes, ice formation increases the salinity, ice melting decreases salinity, and precipitation also increases salinity.  

Thus,  option "C" is correct.

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Answer:c

Explanation:test

Answer:

Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.

Explanation:

Answer:

A mid-ocean ridge is a place where sea floor spreading occurs. They also form new rocks and mountains.

Explanation:

The mRNA sequence GGU AGC CGG encodes the amino acid sequence Gly-Ser-Arg (Option A).

The genetic code makes reference to the linear order of DNA/RNA nucleotides in codons that specify different amino acids.

The genetic code starts in DNA to be transcribed to mRNA and finally translated into protein sequences.

In conclusion, the mRNA sequence GGU AGC CGG encodes the amino acid sequence Gly-Ser-Arg (Option A).

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Answer:

Golgi apparatus, mitochondrion.

Explanation:

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Answer:

2.04 moles of C atoms

Explanation:

The number of moles of C atoms can be calculated using Avogadro's number, which is approximately 6.02 x 10^23 atoms per mole.

To find the number of moles of C atoms in 1.23 x 10^24 atoms, we need to divide the number of atoms by Avogadro's number:1.23 x 10^24 atoms / 6.02 x 10^23 atoms/mole = 2.04 moles

Therefore, if you have 1.23 x 10^24 atoms of C, you would have 2.04 moles of C atoms.

Answer:

2nd one

Explanation:

I believe this is correct. rr is a recessive homozygous.

About the question:

You will find the map in the attached files

Answer:

Explanation:

ISOBARS:

These are lines that join points of similar pressure and indicate atmospheric pressure for different regions. If lines are very close to each other, means that there will be bad weather. This is because, at a short distance, pressure values change, meaning atmospheric instability.  

PRESSURE ZONES:

Isobars indicate the speed and direction of winds. Winds move from high atmospheric pressure areas to lower atmospheric pressure areas.  When isobars are placed as small circles, there is a letter indicating the pressure center. It can be either high pressure symbolized with an H, or low pressure symbolized with an L.  

FRONT TYPES:

There are different types of fronts, which can be represented with different symbols.

CLOUD COVER / WIND SPEED:

Indicated as a key figure on the map.

(Option A) A wildfire rages through a large portion of a forest would be likely to make an ecosystem less stable.

The term "natural environment" or "natural world" refers to all naturally occurring, that is, unmanmade, living and non-living phenomena. The phrase is most frequently used to refer to the Earth or specific regions of the Earth.

Environmental change is the alteration or disturbance of the natural environment, most frequently brought on by human activities and ecological processes. Various variables, such as natural disasters, human meddling, or animal contact, might cause changes in the environment.

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According to the given that actual flower position is dominant over terminal flower.

When an organism possesses two copies of the same dominant allele, it is said to be homozygous dominant, and when it possesses two copies of the same recessive gene, it is said to be homozygous recessive.

When an organism is homozygous, it contains two copies of the same allele for a gene. When two copies of the same dominant allele or two copies of the same recessive allele are present in an organism, it is said to be homozygous dominant or homozygous recessive.

When an organism is heterozygous, it has two distinct alleles of the same gene. For instance, pea plants can have either homozygous dominant (red-red) or heterozygous red blooms (red-white). They are homozygous recessive if they have white blooms (white-white). Heterozygous carriers are always present.

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Answer:

a. Le Chatelier's Principle states that when a system at equilibrium is subjected to a change in concentration, temperature, volume, or pressure, the system will shift its equilibrium position to counteract the effect of the change. In the case of ATP production in the citric acid cycle, a high concentration of ATP would shift the equilibrium position to slow down the production of ATP. This would slow down both the process of removing H's from NAD and FAD as well as the process of putting them on in the citric acid cycle.

b. If someone were to create a drug that blocks the use of complex 2 and makes it impossible for FADH₂ to drop off its H's and become trapped in the FADH₂ form, this would impact both the production of ATP and the reactions in the citric acid cycle. The inability of FADH₂ to drop off its H's would disrupt the flow of electrons through the electron transport chain, reducing the production of ATP. This would also affect the concentrations of other molecules in the citric acid cycle and could potentially propagate to other equilibria.

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To draw a Punnett square for Elizabeth and Alan, we need to consider their genotypes for the PKU disease.

Elizabeth is a carrier of PKU, which means she has one normal allele (denoted as N) and one PKU allele (denoted as p). Therefore, her genotype is Np.Alan is homozygous recessive for PKU, meaning he has two PKU alleles (pp) and does not have a normal allele.

The Punnett square will show the possible combinations of alleles that their child, Sarah, could inherit.

 |   N    |   p    |

-----------------------------

  p   |   Np   |   pp   |

-----------------------------

  p   |   Np   |   pp   |

-----------------------------

In the Punnett square, the top row represents the alleles from Elizabeth (Np), and the left column represents the alleles from Alan (pp).

From the Punnett square, we can see that there are two possible genotypes for Sarah: Np and pp.

If Sarah inherits the genotype Np, she will be a carrier like her mother Elizabeth. She will have one normal allele and one PKU allele, but she will not have the disease.If Sarah inherits the genotype pp, she will have PKU since she has received two PKU alleles from both parents.

It's important to note that Punnett squares provide a theoretical representation of genetic outcomes and do not guarantee the actual genetic inheritance of a child.

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The question is incomplete. The complete question is :

Glucose is the preferred carbon source for  Escherichia coli bacteria. Researchers isolated  E. coli-M, a strain of  E. coli with a single mutation that inactivates a key enzyme in one of the three glycolytic pathways  E. coli bacteria use to break down glucose. In an initial experiment to study the effect of the mutation on glucose utilization and  ATP production by the bacteria, the researchers add  2×104  E. coli-M bacteria to 400  mL of a growth medium that contains glucose. To measure the rate of bacterial growth, they monitor the optical density of the culture as a measure of bacterial concentration over time.

(c) Predict the growth rate pattern of the E. coli-M bacteria when they are initially added to the growth medium if the mutation does not interfere with glucose utilization.

(d) Provide reasoning to justify your prediction.

Solution :

c). It is given that Glucose is preferred as the carbon source for the Escherichia coli bacteria or the E. coli-M bacteria. If the growth medium of the E. coli-M bacteria contains a higher concentration of the acetate, then the growth of the bacteria will inhibit without inhibiting the central metabolism.

d). This is predicted because as E. coli-M bacteria grows, it starts secreting acetate. This is known as overflow mechanism. The regulatory interactions mediated by the acetyl-phosphate that plays an important role in the inhibiting growth by the acetate.

All of these are effective gopher traps, including white clover and herbaceous weeds, a raptor perch or owl box should be installed, and the garlic and castor beans are used for this too.

There are numerous options, such as how to install the raptor perch, garlic can be used for this, and there are many methods included, such as the wire mesh can be used and the repellent scent can be used for this.

Hence, all of these are effective gopher traps, including white clover and herbaceous weeds, a raptor perch or owl box should be installed, and the garlic and castor beans are used for this too.

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Are primarily sugars and starches

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During the termination step of transcription, RNA polymerase stops adding nucleotides to the growing mRNA transcript, causing the mRNA to separate from the DNA template strand and the RNA polymerase. The correct option is C

The precise signals that start the termination phase can differ depending on the kind of cell and the gene being transcribed during the highly regulated process of transcription termination.

The freshly created mRNA transcript is released into the cytoplasm of the cell after the termination stage so that it can go through additional processing, like splicing and modification, before being translated into protein by ribosomes.

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Pedigrees have multiple uses. One of them is getting to know an individual's genotype. In the e xposed example, the individual IIIb is X-Y.

A Pedigree is the representation of a family's history. This graph is used to track a trait through different generations, and analyze the inheritance pattern of a particular gene and its expression.

It is a tool used to understand how genes are transmitted from the parental generation to the descendants, and what are the probabilities of  inheriting them.

In sex linked inheritance, we need to remember that the gene coding for the trait is linked to the sex-chromosome (in this case, the X-chromosome).

In pedigrees, usually affected individuals or individual carring the trait are representes with solid black figures.

Individual IIIb is a black square, meaning it is an affected man. Its genotype is X-Y. The X-chromosome is carrying the recessive allele (-).

In the attached files you will find the pedigree with the genotype of each member of the family. Notice that individuals X+X represent either homozygous dominant or heterozygous females.

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Answer:

C

Explanation:

Comment its correct or not correct please

Answer:

Charles Darwin proposed the theory of natural selection.