Molecules that absorb light energy are called

The organism isolated from the culture of Gram-positive cocci bacteria in chains which are catalase negative and resistant to optochin are: (c) Streptococcus viridians.

Gram positive bacteria are the types of bacteria which retain the color of the crystal violet stain. The cell wall of such bacteria are thick, mainly composed of peptidoglycan. Thus thick layer helps in retaining the stain.

Streptococcus viridians are streptococcal bacteria which are spherical in shape and attached to each other to form a chain. These bacteria are catalase negative which means they do not synthesize the catalase enzyme. Streptococcus yield a negative result in optochin sensitivity as well.

Therefore the correct answer is option c.

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The given question is incomplete, the complete question is:

A young boy who routinely bites his finger nails develops a wound on his right pointer finger. A culture reveals alpha hemolytic, dry colonies on the blood and CNA plates that are catalase negative, resistant to optochin, and 6.5% NaCl negative. Gram stain of the colony is Gram-positive cocci in chains. The organism most likely isolated is:

a. Enterococcus faecium

b. Enterococcus faecalis

c. Streptococcus viridians

d. Streptococcus agalactiae

A possible follow-up experiment could be to investigate the effect of different types of vegetation on the abundance and diversity of organisms on green roofs.

The study by Wooster et al. found that green roofs promote metropolitan biodiversity, but did not investigate the effect of different types of vegetation on this biodiversity. A follow-up experiment could focus on comparing the abundance and diversity of organisms on green roofs with different types of vegetation, such as native plants versus non-native plants.

The experiment could involve setting up multiple green roofs with different types of vegetation, and monitoring the abundance and diversity of organisms on each roof over a set period of time. Data could be collected on the presence of avian, gastropod, and arthropod species, as well as other types of organisms such as insects and microorganisms.

The results of this follow-up experiment could provide insight into which types of vegetation are most effective at promoting biodiversity on green roofs, and could help inform the design and construction of future green roofs. Additionally, the experiment could contribute to our understanding of the role of urban green spaces in supporting biodiversity in urban environments.

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Answer:

here:

Explanation:

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

Answer:

Yes. So are earthquakes and volcanoes.

Explanation:

Answer: No, I don't think so.

Explanation:

Answer:

the weakness potential is for invasion of individual privacy.

Explanation:

Because a person's DNA reveals so much information about their physical state, it is sensitive information that must be carefully guarded.

A big, nutrient-rich yolk is a characteristic adaptation of a mature catfish egg. Like many other fish species, catfish also lay eggs that are frequently demersal, or sheltered in a nest or placed on a substrate.

The mature egg of fish is surrounded by an acellular coat conventionally called the chorion. In Carassius auratus, three main layers can be recognized at the electron microscopic level, and we have termed them ch1, ch2, and ch3 starting from the outer side to the inner side close to the egg plasma membrane.

Fish eggs immediately upon fertilization are spherical in shape with various components, including maternal mRNAs, numerous organelles, yolk inclusions, proteins, as well as lipid droplets and pigments intermingled in the egg cytoplasm (Lubzens et al., 2010).

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Q- Adaptive feature of a matured egg of a catfish.

a) To calculate the allele frequencies, we can use the Hardy-Weinberg equation:

p^2 + 2pq + q^2 = 1

where p is the frequency of the dominant allele (H) and q is the frequency of the recessive allele (h).

We know that hairy fleece (H) is dominant and that 78% of the population has hairy fleece, so we can write:

p^2 + 2pq + q^2 = 1

p^2 + 2p(0.78) + (0.22)^2 = 1

p^2 + 1.56p + 0.0484 = 1

p^2 + 1.56p - 0.9516 = 0

Solving for p using the quadratic formula, we get:

p = (-1.56 ± √(1.56^2 - 4(1)(-0.9516))) / (2(1))

p = (-1.56 ± 1.667) / 2

Since p cannot be negative, we take the positive solution:

p = 0.553

So the frequency of the dominant allele (H) is 0.553, and the frequency of the recessive allele (h) is:

q = 1 - p = 1 - 0.553 = 0.447

b) The percentage of the population that would be heterozygous can be calculated using the equation:

2pq

where p and q are the allele frequencies. So we can substitute the values we calculated above and solve:

2pq = 2(0.553)(0.447) = 0.494 or 49.4%

So about 49.4% of the sheep population would be expected to be heterozygous for the hairy and wooly fleece alleles.

Since hairy fleece is the dominant phenotype and the frequency of this phenotype in the population is 78%, we can assume that the frequency of the dominant allele (H) is q² = 0.78, where q is the frequency of the recessive allele (h).

This means that about 21.1% of the population would carry one copy of the dominant allele and one copy of the recessive allele, and would exhibit the dominant phenotype.

To solve for q, we can take the square root of both sides:

q = √0.78 ≈ 0.88

Therefore, the frequency of the recessive allele (h) is 0.12.

To calculate the percentage of the population that would be heterozygous (Hh), we can use the Hardy-Weinberg equation:

p² + 2pq + q² = 1

where p is the frequency of the dominant allele (H) and q is the frequency of the recessive allele (h).

Substituting in our values, we get:

(0.88)² + 2(0.88)(0.12) + (0.12)² = 0.7744 + 0.2112 + 0.0144 = 1

Therefore, the percentage of the population that would be heterozygous is:

2pq x 100% = 2(0.88)(0.12) x 100% ≈ 21.1%

So approximately 21.1% of the population would be heterozygous for the hairy and wooly fleece alleles.

Thus, With a frequency of 78% for the dominant phenotype (hairy fleece), we can assume that the frequency of the dominant allele (H) is q² = 0.78 and the frequency of the recessive allele (h) is 0.12. Using the Hardy-Weinberg equation, we can calculate the percentage of the population that would be heterozygous (Hh) as approximately 21.1%.

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Given what we know, we can confirm that the statement in the question is in fact true given that the chemiosmotic gradient causes the production of an electrochemical gradient.

Therefore, we can confirm that the statement is true given that although one definition is specific to a special ion, both refer to the same mechanisms and will be present together.

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Answer:

I believe it is A, it is a crucial part of the process

Plants regulating their ion balance is the most important function for a plant. Thus, the correct option is A.

Plants also need nutrients for the healthy growth in plants. Carbon dioxide is obtained from air. Inorganic ions in the plants are obtained from the soil where they are dissolved in water in plant body. The three ions which are required in the greatest amounts are nitrate, phosphate, and potassium which are the sources of nitrogen (N), phosphorus (P), and potassium (K), respectively.

The range of unbalance between the positive ions and negative ions in the plant body is called ion balance.

Therefore, the correct option is A.

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Answer:

Explanation:

The mass of the substance is determined by subtracting the first reading from the second. A container holding the substance of interest is placed on the balance and weighed. This is the first reading. The substance to be used is removed from the container and the container weighed again.

Answer:

298

Explanation:

because

Answer: 167

Explanation:

Potassium chloride (KCI) triggers spawning in sea urchins by mimicking environmental signals and altering ion concentration.

Potassium chloride (KCI) induces spawning in sea urchins through a combination of factors. Firstly, when KCI is injected into a sea urchin, it alters the ion concentration within the urchin's body. This change in ion concentration triggers a response where the sea urchin pulls in seawater, resulting in increased pressure on the gonads. This increase in pressure mimics the natural environmental signals present in seawater that normally stimulate spawning in sea urchins.

Secondly, KCI acts as an irritant to the sea urchin. The injection of KCI into the urchin's body causes discomfort, and the urchin tries to expel the irritant by spawning. This expulsion mechanism is a natural response to potentially harmful substances within the body.

Lastly, potassium chloride also triggers the contraction of the muscles surrounding the gonads. The contraction of these muscles helps to expel the gametes during spawning. By inducing muscle contractions, KCI plays a direct role in initiating the release of eggs or sperm.

In summary, potassium chloride (KCI) triggers spawning in sea urchins by altering the ion concentration within the urchin's body, mimicking environmental signals that normally trigger spawning, and initiating muscle contractions. These processes collectively stimulate the sea urchin's reproductive system and lead to the release of gametes.

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Answer:

The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. The frequency of dark-coloured moths increased at that time, an example of industrial melanism.

Answer:

Option D, the "biological ladder"

Explanation:

The food chain is the network of organism in which all are dependent on each other for their food, energy source and survival.  

The circle of life depicts the time frame starting from origin of a life form till its death and the intermediate stages.

The tree of life basically determines which organism has evolved from which other organisms.  

The biological ladder represents the development of species from simple form to a much complex form.

Hence, option D is the right metaphor

Answer:

Explanation:

C

The karyotype of an individual with trisomy 18 is represented as Edward's syndrome. It occurs due to failure of the sister chromatids to separate in mitosis.

The karyotype with trisomy 18 is a genetic disorder. It is also known as Edward's syndrome. In this disorder, a person has a third copy of the material from chromosome 18, instead of the usual 2 copies. Rarely, the extra chromosomal material may be attached to another chromosome i.e., translocation. In most cases, this chromosome is not passed down through the families.

During cell division, chromosomes do not always separate equally into daughter cells which results into one daughter cell with extra chromosome and one daughter cell with no or small stretch of chromosome. This sometimes happens in mitotic division, when the sister chromatids fail to separate out during anaphase. One daughter cell thus ends up with more chromosomes in its nucleus than the other cell.

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Answer:

They have genes for the same traits

Explanation:

Mudarabah is participation-based contract and it is divided by Mutlaqah and restricted and the rabbul mal normally covers 100% losses, option B is correct.

Mudarabah is a participation-based contract commonly used in Islamic finance. It involves two parties: the entrepreneur (mudarib) and the capital provider (rabbul mal). The mudarabah contract is divided into the entrepreneur's effort and the capital contributed by the rabbul mal. The entrepreneur utilizes their skills and expertise to manage the business, while the rabbul mal provides the funds.

In this contract, the entrepreneur receives a share of the profits generated from the business, as agreed upon in advance, while the rabbul mal receives a predetermined portion of the profits as a return on their investment. However, the rabbul mal generally covers all the losses incurred in the business, unless the entrepreneur's negligence or misconduct is proven, option B is correct.

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The correct question is:

Mudarabah is ____________ contract and it is divided by ____________ and ____________ and the rabbul mal normally covers ____________ losses

A. Supporting; Mutlaqah; Ressicted; 50%

B. Participation-based; Mutlaqah; Restricted; 100%

C. Supporting; Musharkah; Mutlaqah; 0%

D. None of the above

Complete Question:

Natural selection can, through common descent, produce closely related species that have similarities due to their shared ancestry. Natural selection can also, through convergent evolution, lead to distantly related species appearing very similar. Identify which examples reflect common descent and which reflect convergence.      

Answer and Explanation:

Answer:

The correct answer would be - mutations in the p53 would prevent abnormal cells from dying by apoptosis.

Explanation:

P53 or tumor protein 53 gene is the gene that produces a protein that controls DNA repair and apoptosis in the cell cycle if there is an error in the DNA or cells growing abnormally therefore known as tumor suppressor gene.

If there is a mutation in this gene will prevent it from performing its function of DNA repair or stimulating apoptosis and then p53 would prevent abnormal cells from dying by apoptosis.

Thus, the mutation in P53 would lead to the growth or development of lung cancer.

Nadia is exposed to high levels of radiation during the 6th, 7th, and 8th weeks of gestation so virtually all organ systems are vulnerable during this time.

There are 11 separate organ systems that make up the core of human anatomy and physiology. The 11 organ systems include the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal and muscular system, endocrine system, lymphatic system, neurological system, and reproductive system. The body has various systems in addition to organ systems. The immune system, which protects the body from infection, is not an organ system because it is not made up of organs.

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Option d)  It is a region of DNA that can form a hybrid duplex with DNA of another species. function is served by the major groove in dna.

Deoxyribonucleic acid  is a kind of DNA. DNA is a polymer made up of two polynucleotide chains that coil around one another to create a double helix. (listen);[1] DNA) is one such polymer. All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid (RNA).

Nucleic acids are one of the four main categories of macromolecules that are necessary for all known forms of life, along with proteins, lipids, and complex carbohydrates (polysaccharides).

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Answer:

increasing the concentration of carbon dioxide.

Explanation: Burning of fossil fuels, like gasoline, causes atmospheric change by increasing the concentration of carbon dioxide.

The density of the unknown substance is 3.6 g/ml

As,

\(d=\frac{mass}{volume}\)

where,

            Mass= 18 grams

            Volume = 5 ml

d \(=\frac{18}{5} \frac{g}{ml}\)

d = 3.6 g/ml

What is Density?

Density is the mass of a material substance per unit volume.

The formula for density is

\(d=\frac{M}{V}\)

M is mass

V is volume

d is density

Grams per cubic centimeter are a typical unit of measurement for density.

We can calculate what materials will float and sink when placed in a liquid using the concept of density, which is a crucial idea. The rule of thumb is that objects will float as long as their density is lower than the liquid's density.

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Answer:

The force of gravity would increase

Answer:

A. algae->blackfly->freshwater shrimp->trout->bald eagle

Answer:

Bald eagles are carnivorous and eat mostly fish and other birds. Mammals make up a small percentage of their usual diet. Bald eagles have been studied to hunt and eat some 400 species, including some large animals like deer fawns. They're opportunistic predators and will eat both living animals and carrion

Explanation:

hope it will help you

In conclusion, an imaginary line drawn through the body to separate it into sections and create directional terms is called a body plane. The three main body planes are sagittal, frontal, and transverse, each dividing the body into different sections to facilitate anatomical description and analysis.

An imaginary line drawn through the body to separate it into sections and create directional terms is called a body plane. Body planes are used as a reference to describe the position and direction of body structures. They help in understanding anatomical relationships and movements within the body.
There are three main body planes commonly used in anatomy:
1. Sagittal plane: This plane divides the body into left and right halves. It runs vertically from front to back, creating a right and left side. An example of a sagittal plane is the midline that separates the nose into two equal halves.
2. Frontal (coronal) plane: This plane divides the body into front (anterior) and back (posterior) portions. It runs vertically from side to side, creating a front and back side. For instance, a cut across the chest from shoulder to shoulder would be in the frontal plane.
3. Transverse (horizontal) plane: This plane divides the body into upper (superior) and lower (inferior) parts. It runs horizontally, creating an upper and lower section. A transverse plane could be represented by a line drawn across the waist.
By using body planes, medical professionals can accurately describe the location, orientation, and movement of body structures. Understanding these planes is essential for effective communication in healthcare and anatomical studies.
In conclusion, an imaginary line drawn through the body to separate it into sections and create directional terms is called a body plane. The three main body planes are sagittal, frontal, and transverse, each dividing the body into different sections to facilitate anatomical description and analysis.

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The main contributors to the cell theory were Theodor Schwann, Rudolf Virchow, and Matthias Jakob Schleiden.

Cell theory is the theory that tells about the main postulates about cells. Cells are the basic unit of life. Every organism is made up of cells. New cells are made up of old cells.

Schwann and Schleiden postulated that the cell is the primary unit of the organism. Virchow said that animals can not be present without cells.

Therefore, the cell theory was the result of three scientists. They are Theodor Schwann, Rudolf Virchow, and Matthias Jakob Schleiden.

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A methyl group is a functional group consisting of three hydrogen atoms bonded to one carbon atom.

This is exactly what is shown in the image - one carbon atom with three hydrogen atoms attached to it. An amino group, on the other hand, consists of a nitrogen atom bonded to two hydrogen atoms and one carbon atom. A phosphate group consists of a phosphorus atom bonded to four oxygen atoms, and a carbonyl group consists of a carbon atom double-bonded to an oxygen atom. Therefore, the correct answer to this question is B. a methyl group.
Methyl groups are commonly found in organic molecules and play a key role in various biochemical reactions. They are known to be non-polar and hydrophobic, which makes them important in determining the solubility and reactivity of a molecule. Methyl groups are also important in the regulation of gene expression, as they can affect the function of DNA and RNA molecules. For example, the addition or removal of methyl groups from a DNA molecule can alter the way it is transcribed and translated, leading to changes in the phenotype of an organism. In addition, methyl groups are involved in the synthesis of neurotransmitters, hormones, and other signaling molecules in the body. Overall, methyl groups are an important functional group in organic chemistry and have numerous biological functions.

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