Typically, methylation of nucleosome N-terminal tails leads to
a. relaxed packaging of the chromatin and increased transcription
b. activation of topoisomerase
c. removal of the protein components of the chromatin from the DNA
d. increased amounts of euchromatin relative to heterochromatin
e. tighter packaging of the chromatin and reduced transcription

Answer:

global warming

Explanation:

it will make agriculture very hard

In biology, upwelling is the process by which deep, cold, nutrient-rich water rises to the surface of the ocean, often along the coastline. This occurs when the wind blows parallel to the coast and pushes the surface water away from the shore, allowing deeper water to rise to the surface.

Upwelling is an important process in the ocean because it brings nutrients from the deep ocean to the surface, where they can be used by phytoplankton and other small organisms. This, in turn, supports the growth of larger organisms such as fish, which depend on the phytoplankton as a food source. Upwelling also helps to cool the surface water and can have a significant impact on local climate and weather patterns.

Answer:

Scientists use science to___Study_________________the world.

Explanation:

Hope this helps :)

Answer:

Although the question is pretty simple,the answer,I'm afraid, could occupy a whole volume of a book.

But very simply put the secondary sexual growth in males is under the influence of testosterone. Males also produce estrogen but in very small amounts,which makes the effect of estrogen very minimal and almost negligible.

Sexual growth in females is under the influence of estrogen and then progesterone.

In both cases,the physiological process is quite similar:

At puberty in males,the hypothalamus produces gonadotropin releasing hormones which causes the anterior pituitary lobe to produce leutinizing hormones(LH) and follicle stimulating hormones(FSH). LH acts on leydig cells in the seminiferous tubules of the testes to produce testosterone and FSH acts on the Sertoli cells in the seminiferous tubules of the testes to produce androgen binding proteins(ABP). Together testosterone and ABP cause sperm production.

At puberty in females, ,the hypothalamus produces gonadotropin releasing hormones which causes the anterior pituitary lobe to produce leutinizing hormones(LH) and follicle stimulating hormones(FSH). FSH causes growth of the primordial follicle into a mature Graafian follicle while LH presence causes exocytosis of the mature oocyte (ovulation) in about 48hours.

Answer:

1. DD

2.Dd

3.Dd.

4.dd

When two heterozygous purple pea plants are crossed, the genotypes are 1 PP, 2 Pp, and 1 pp. Three offspring will be purple, and one will be white.

A genetic cross involves two parents: ,one is the maternal parent, and the other is the paternal parent. The genetic cross is explained with the help of the punnett square.

The example is the purple petal in the pea plant. The purple Petal colour is dominant to white Petal colour. P is dominant to p. Hence PP and Pp will produce purple petal colour in case of complete dominance. pp will produce white Petal color 

When two heterozygous parents are crossed, each parent will produce two gametes, such as P and p. As a result, two types of phenotypes will be produced in cases of complete dominance, such as three purple and one white offspring. The cross is explained below.

Hence, if the heterozygous purple pea plants are crossed, then the genotypes would be 1 PP, 2 Pp, and 1 pp. The ratio is 1:2:1 of PP :Pp: pp.

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When a hair cell stereocilia bend away from the kinocilium, then it releases neurotransmitters. Thus, the correct option is A.

A neurotransmitter is a signaling molecule which is secreted by a neuron or nerve cell in the body to affect another cell across a synapse. The cell which is receiving the signal, any main body part or the target cell, may be another neuron, but it could also be a gland or any type of muscle cell.

The seven small molecules which act as neurotransmitters are acetylcholine, dopamine, gamma-aminobutyric acid (GABA), glutamate, histamine, norepinephrine, and the serotonin, do the majority of the work.

Therefore, the correct option is A.

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Answer:

where is the question???????????

water?  not sure buddy

Explanation:

A- represents gene for normal skin

a- represents a gene for albinism

Genotype Aa × As

Gametes A a A a

Gamete A a

A. AA Aa

a. Aa. aa

Superbugs are bacteria that have developed resistance to most commonly used antibiotics, making them difficult to treat and potentially dangerous.

Some of the most well-known superbugs include Methicillin-resistant Staphylococcus aureus (MRSA), Vancomycin-resistant enterococci (VRE), and Carbapenem-resistant Enterobacteriaceae (CRE).

MRSA is a strain of Staphylococcus aureus that has developed resistance to many antibiotics, including methicillin and related drugs. VRE is a type of Enterococcus bacteria that has developed resistance to the antibiotic vancomycin, which is often used to treat serious infections. CRE are a group of bacteria that have developed resistance to carbapenem antibiotics, which are often used as a last resort to treat antibiotic-resistant infections.

These superbugs have become a significant public health concern, as they can cause serious and sometimes life-threatening infections that are difficult to treat with existing antibiotics.

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Answer: Carbapenem-Resistant Enterobacterales (CRE) is a multidrug-resistant organism.

Explanation: Carbapenem-Resistant Enterobacterales (CRE) is a multidrug-resistant organism. It is considered a "super bug" because it is resistant to most commonly used antibiotics and in some cases to all available antibiotics. Super bugs or antibiotic-resistant bacteria can cause infections including lung (pneumonia), urinary tract and skin infections. Preventing the spread of CRE and other antibiotic-resistant infections begins with practicing good hand hygiene and using antibiotics only when necessary.  

The two things which interfere with an enzyme's ability to speed up a chemical reaction are the temperature and pH condition.

The enzyme activity refers to the number of moles of the product which are formed per unit of time. The enzyme activity and the concentration of the enzyme can help in determining the specific activity of the enzyme in a reaction. The specific activity is the ratio of the enzyme activity to the concentration of enzyme.

Several factors which affect the rate at which enzymatic reactions proceed include temperature, pH, enzyme concentration, substrate concentration, and the presence of inhibitor molecules or activators.

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The only cells that can correctly attach sugars to proteins to form glycoprotein products are cells that contain the necessary enzymes and molecular machinery for glycosylation, such as epithelial cells, endothelial cells, and certain immune cells.

Glycosylation is a post-translational modification process in which sugars are attached to proteins to form glycoproteins. This process is complex and requires specific enzymes and molecular machinery. Cells that are capable of glycosylation include epithelial cells, which line the surfaces of organs and glands, endothelial cells, which form the inner lining of blood vessels, and certain immune cells. These cells have specialized Golgi apparatus, which is responsible for processing and modifying proteins, including glycosylation. Additionally, some cancer cells have altered glycosylation patterns, which can be used as a diagnostic or therapeutic target.

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ATP is the molecule that energizes muscle contraction by providing energy for the cross-bridge cycling of myosin and actin filaments.

Acetylcholine is the neurotransmitter that is released from the axon end of a nerve cell, stimulating the muscle fibers to contract. Ca ion storage site refers to the sarcoplasmic reticulum, which stores and releases Ca ions needed for muscle contraction. Twitch refers to a single, short muscle contraction.

The pelvic girdle is the attachment point for the legs and serves as a structural support for the spine. Levers are the bones and joints that work together to amplify the force or velocity of motion. Osteoblasts are cells that lay down new bone tissue during the process of bone growth and repair.

Thus, understanding these terms and their functions is important for understanding the structure and function of the musculoskeletal system.

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The shape of proteins are affected by temperature and pH.

The change of shape of proteins is known as denaturation.

Denaturation of a protein will make it unable to function.

Proteins are large molecules which are found in living organisms.

The shape of proteins are affected by temperature and pH of their environment.

The change of shape of proteins is known as denaturation.

Denaturation of a protein will make it unable to function since protein function depends on its shape.

In conclusion, protein denaturation affects its function.

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Insulin, a protein hormone, is synthesized and processed in the rough endoplasmic reticulum (RER) of the beta cells of the pancreas.

After the synthesis of insulin, it undergoes post-translational modifications, such as folding and addition of carbohydrate groups in the RER. Then, it moves to the Golgi apparatus through the smooth endoplasmic reticulum (SER) for further modifications, including sorting and packaging. In the Golgi apparatus, insulin undergoes further modifications, such as glycosylation, before being packaged into vesicles for secretion.

Therefore, the order of passage for insulin through the endoplasmic reticulum would be RER (rough endoplasmic reticulum) first, followed by the SER (smooth endoplasmic reticulum) before reaching the Golgi apparatus for further processing and secretion.

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Insulin, a hormone, is synthesized in the rough endoplasmic reticulum (RER) and then transported to the smooth endoplasmic reticulum (SER) for further processing and packaging before being secreted by the cell.

Insulin is synthesized in the rough endoplasmic reticulum (RER), where it undergoes post-translational modifications such as folding and glycosylation. After processing in the RER, insulin is transported to the Golgi apparatus for further modification and packaging into vesicles. These vesicles then move towards the plasma membrane for secretion. Therefore, the order would be RER -> Golgi apparatus -> secretion.

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Answer:

I think science

Explanation:

Answer:

For females, secondary sex characteristics include relative lack of body hair, thicker hair on the head (in some cases), rounded hips/figure, a decreased ability to generate muscle mass at a fast rate, decreased upper body strength, breasts, ability to nurse children, a menstrual cycle, and increased body fat .

Explanation:

Answer:

The answer to this question is given below in this explanation section.

Explanation:

               "advantages of interconnecting air sacs for birds"

The air sacs permit a unidirectional flow of air through the lungs.Unidirectional flow means that air moving through birds lungs is largely fresh air and has a higher oxygen content.In contrast air flow is bidirectional in mammals moving back and forth into and out of the lungs.As a result air coming into a mammals lung is mixed with old air has less oxygen. so in bird lungs,more oxygen is available to diffuse into the blood(avian respiratory system).

Answer:

A large region of interconnected ecosystems.

Explanation:

If a student examines two bacterial cells, Cell I and Cell II, and he finds that cell I produce CO₂ and ethyl alcohol during cellular respiration while cell II produces carbon dioxide and water, then the conclusions are that cell I produce energy by Fermentation, while cell II produce energy by cell respiration.

Cell respiration is a process that aerobic organisms use to produce energy, which releases carbon dioxide and water as byproducts of such chemical reactions in the organism.

Therefore, with this data, we can see that cell respiration produces energy and carbon dioxide, whereas fermentation does not produce carbon dioxide.

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Answer:

X-rays because the higher the frequency the shorter the wavelength

Explanation:

Answer:

In eukaryotic cells, or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase. During interphase, the cell grows and makes a copy of its DNA. During the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.

Explanation:

Answer:

D, C, F, E, A, B, G, H

Explanation:

During the study of genetics and inheritance, it is important to observe the sexual cycle of fungi to determine the genetic variations within the offspring. In the 1920s, T. H. Morgan and his colleagues used fungal genetics to test the hypothesis of the existence of recombination. For instance, they observed the sexual cycle of the common bread mold, Neurospora crassa, to investigate how crossing-over occurs between homologous chromosomes during meiosis.

As a result of their investigation, Morgan and his colleagues discovered that, during meiosis, four haploid ascospores are produced within a specialized sac called an ascus. These ascospores are produced when two nuclei from two different hyphae (cells) combine and fuse together.

This fusion creates a cell with two haploid nuclei, which subsequently undergoes meiosis to create four haploid ascospores. Hence, an ascus will contain four haploid ascospores produced by a single diploid cell resulting from the fusion of two haploid cells.

The percentage of asci observed that resulted from the fusion of cells from different strains is 100%. This is because the fusion of haploid cells from different strains is essential for the production of a diploid cell that will then undergo meiosis to form four haploid ascospores.

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The backbone protects the spinal cord.

The central nervous system of the human body is made up of the lengthy, delicate, and crucial spinal cord. It passes through the spinal column, which is made up of separate bones called vertebrae, as it descends from the base of the brain. To move, experience sensations, and regulate bodily processes, messages must travel through the spinal cord from the brain to the rest of the body.

The spinal cord is shielded from harm by the vertebrae of the backbone. They are layered on top of one another and protected by pliable, supple discs that provide flexibility and stress absorption. Together, the vertebrae create a sturdy and adaptable structure that protects the spinal cord and supports it while also enabling optimal movement and function. The spinal cord would be fragile without the support of the backbone, which could have detrimental effects on a person's health and welfare.

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The complete question is-

Who protects the spinal cord?

A) Skin B) lungs C) heart D) Backbone

The mass of the wax after the melting would still be exactly 50 g

A cornerstone of physics and chemistry is the law of conservation of mass, commonly referred to as the principle of mass conservation. It asserts that mass cannot be created or removed in a closed system.

In other words, the total mass of a closed system remains constant over time, regardless of any physical or chemical changes that may occur within the system.

Since the mass of the wax would not change, it would be right to say that by this law, the melted wax would stull weigh 50g

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Answer:

b

Explanation:

Answer:

The stomach empties the chyme containing the broken down egg pieces into the small intestine, where the majority of protein digestion occurs. The pancreas secretes digestive juice that contains more

Explanation: