Answer:
HOMONE(especially lignand)
Explanation:
Chemical signals between cells are called ligands. A ligand is a molecule that binds another specific molecule. In the case of cell signaling, the ligand binds a receptor, a protein in or on the target cell. Examples of ligands include hormones and neurotransmitters.
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What dissection instrument should we use to clean adhering tissues during dissection.
Answer:
Russian Forceps: Used for atraumatic tissue grasping during dissection. Tissue Forceps: Non-toothed forceps used for fine handling of tissue and traction during dissection. Adson Forceps: Forceps toothed at the tip used for handling dense tissue, such as in skin closures.
Explanation:
a very large, fast-adapting tactile receptor that is composed of a single dendrite enclosed by concentric layers of collagen is a
The term "lamellated corpuscle" refers to a particularly large, rapidly adapting touch receptor made up of a single dendrite encased by concentric layers of collagen.
What types of tactile sensors are there?Merkel's disks, Meissner's corpuscles, Ruffini endings, and Pacinian corpuscles are the four main subtypes of tactile mechanoreceptors. In the upper layers of skin that has hair or is glabrous, Merkel's disks are slow-adapting, unencapsulated nerve endings that respond to light touch.
What role does tactile play?The tactile corpuscle is in charge of delivering low-frequency vibrations and light touch sensations from the peripheral nervous system to the brain.
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Explain the role of the cell membrane during passive transport and active transport.
Answer:in the passive moment, it allows diffusion of small and non polar molecules to pass in or out of the cell and prevents unwanted polar ions or molecules to enter the cell. Also proteins help in carrying out facilitated diffusion for ions and big molecules.In active process, proteins in the membrane act as a path for molecules which are bigger and charged and are moving against the concentration gradient.
Explanation:
if facultative mutualists do not require another species to help them, why do they engage in mutualism?
Facultative mutualists do not require another species to help them, but they engage in mutualism because facultative mutualists benefit greatly in fitness from the interactions with other species in mutualism.
What is facultative mutualistic relationship?Facultative mutualistic relationship is a type of mutualism in which interacting species derive benefits from each other but not being fully dependent.
Mutualism is highly complex but it can be broken down into two types of relationship. In some cases, species are entirely dependent on each other (obligate mutualism) and in other case, they derive benefits from their relationship but can survive without each other (facultative mutualism).
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What name given to organisms that live in acidic medium
what is the likelihood of a person having the dna fingerprint above? the allele frequencies are indicated next to the allele bands.
DNA from fingerprints is useful when there is no body fluid left at a crime scene and when fingerprints are not sufficiently clear to provide reliable identification.
why is Identification from fingerprints is preferable?
Due to the larger database of fingerprints available for comparison, fingerprint identification is preferred to fingerprint identification over fingerprint identification via DNA; however, in cases where fingerprint ridges lack sufficient detail, fingerprint identification via DNA may still be the only option. As methods for extracting cells from a fingerprint and for DNA extraction become more effective, this method of identification will spread more widely.
According to the question:
The Technical Support Working Group, a national forum that identifies, prioritizes, and manages interagency and international research and development requirements for countering terrorism, provided funding for two pertinent research projects carried out in 2000 and 2002. The goal of the study was to take chemically altered fingerprints and extract and analyze DNA from them.
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how is healthy soil important to us
All body cells in an organism have the same dna what makes blood, skin and bone cells different
Answer:
These cells are different because they use the same set of genes differently. So even though each of our cells has the same 20,000 or so genes regulation is how a cell controls which genes, out of the many genes in its genome, are "turned on" (expressed). Thanks to gene regulation, each cell type in your body has a different set of active genes.
Explanation:
I Need Help. Please and Thank you. Which type of cells does the HIV virus target?
A. T5
B. T4
C. H5
D. H4.
HIV virus primarily targets the T4 cells, option B.
What are T4 cells?The T4 cells are a type of lymphocyte that are produced in the bone marrow. T4 are also known as T-lymphocytes, T4 helper cells or CD4+ cells. Their major role is to control immunological responses for the body.
HIV is an immuno-compromising virus that attacks the immune system. It primarily targets the T4 cells to cripple it ability to send timely responses to the cells and allow other diseases gain access to the body before the body has a chance to retaliate.
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Answer:
T4
Explanation:
HIV targets a type of cell called the T-helper cell (also called T4 cells) which can be found in the immune system.
The main target for HIV is a white blood cell called a T4 lymphocyte, or “T helper cell”. The T4 cell is responsible for warning your immune system that there are invaders present.
The sodium-potassium pump requires a carrier protein that binds
three sodium and two potassium ions.
two sodium and three potassium ions.
one sodium and four potassium ions.
three sodium and four potassium ions
Active transport carrier proteins are sodium-potassium pumps.
The Correct Answer is : three sodium and two potassium ions.
What is Sodium-potassium pump (Na+/K+ pump)?Antiporters include the Na+/K+ pump. Na+ and K+ ions can bind to it at specific locations. The pump needs an energy source because the movement of these ions is opposed to their concentration gradients. In order to hydrolyze ATP into ADP, it attaches to it. Energy is thus released as a result. The pump modifies its form using this energy. The ions release from the pump following the conformational shift, but they do so in different directions. K+ ions are injected into the cell while Na+ ions are pumped out. The Na+/K+ pump plays a critical role in maintaining the potential of cell membranes and transmitting nerve impulses, making its role extremely important. Motor neurons' ability to operate normally can be interfered with by a lack of K+ ions, which will cause the target.Motor neurons' and consequently the target muscles' functionality may be compromised by a lack of K+ ions.To Learn more About sodium-potassium pumps refer To:
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compare and contrast promoter-proximal elements and the operator of the lac operon. what do they have in common?
Both are nearby promoter-located regulatory regions in the DNA.
What interacts with the promoter-proximal components?The PSE-binding transcription factor particularly binds the proximal sequence element (PSE), which is present in small nuclear RNA (snRNA) genes that are transcribed by both RNA polymerase II (Pol II) and RNA pol III (PTF).
Enhancers or promoter-proximal elements?Proximal control elements are placed near the promoter, hundreds of nucleotides away from enhancers.Enhancers are DNA sequences, while transcription factors are proximal control elements.
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What takes place in a cell’s mitochondria?
Explanation:
The mitochondria is called the powerhouse of the cell because it is responsible for producing most of the cell’s energy, or adenosine tri-phosphate (ATP). The mitochondria converts chemical energy from the food we eat into an energy form that the cell can use. This process is called oxidative phosphorylation.
Answer:
Known as the “powerhouses of the cell,” mitochondria produce the energy necessary for the cell's survival and functioning.
Explanation:
Mitochondria, using oxygen available within the cell convert chemical energy from food in the cell to energy in a form usable to the host cell. The process is called oxidative phosphorylation and it happens inside mitochondria
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If you were constructing a phylogenetic tree for the evolution of birds, which characters found in archaeopteryx might provide evidence that birds and dinosaurs had a common ancestor?.
Teeth , flat sternum and claws of provide archaeopteryx evidence that birds and dinosaurs had a common ancestor.
The structure and arrangement of Archaeopteryx's wings' feathers, which are comparable to those of most modern birds, suggest that it was able to fly.
Dinosaurs drastically reduced and acquired a more baby-like head form as they evolved into birds. Left to right: a contemporary chicken and pigeon; Archaeopteryx, commonly referred to as the first bird; Velociraptor, a dinosaur from the group that gave origin to birds.
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Explain why the electron configuration of 2-7-1-1 represents a sodium atom in an excited state.
Sodium has the structure 2,8,1 in the ground state. When one electron is promoted from the L shell to the N shell, the configuration 2-7-1-1 is present. The more energetic state of an atom is called the excited state.
The effects of salt on the bodyIn order to convey nerve impulses, expand and promote relaxation, and maintain the right ratio of water and minerals, the human body needs a little quantity of sodium. Our daily requirement for salt for these essential processes is thought to be 500 mg.
Compared to salt, is sodium healthier?Foods that haven't been processed are what we desire in the ideal world since the more salt is added to food during processing, the longer it takes. In chemistry, sodium and chloride are combined to form salt.
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Gelatin is a protein that is derived from collagen which is found in the bones skin and connective tissue of animals. What would be the most appropiate control for this expirement?
Gelatin is a naturally occurring, non-toxic biomacromolecule made of bioactive polypeptides that are generated from collagen found in the skin, bones, and connective tissues of animals. It will display the color change that takes place when there is no enzyme activity.
Gelatin—is this an animal tissue?Gelatin is a soluble protein that resembles albumin that is created when animal tissues are boiled for a long time (typically bones, skin, and tendons).
Are animals used to make gelatin always?Is Gelatin Vegetarian? Gelatin is neither vegetarian nor vegan, to put it succinctly. Whether it comes from cows, pigs, horses, or fish, it always originates from animal sources. Agar Agar, which is described below, is a vegetarian substitute for gelatin.
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2
Which of the following is an example of stewardship towards the environment?
OA. giving money to charities
OB. helping find a lost dog
OC. pouring unused medicine down the drain
OD. volunteering to help plant trees
Answer: installation of water saving fixtures, grey water recycling systems, reuse of production waste water, rain water harvesting systems
Explanation: installation of water saving fixtures, grey water recycling systems, reuse of production waste water, rain water harvesting systems, etc. Material Conservation Conserve materials used at your site by changing process, product or formulations, participate in waste exchanges, reuse operational waste, etc.
Answer:
volunteering to help plant trees
Explanation:
OD
Which choice accurately models transcription and translation of the following gene: ggc ctg gtt aaa tgg?.
DNA is copied during transcription by mRNA. The mRNA strand duplicates a DNA strand as DNA is "unzipped" in this process. MRNA then exits the nucleus after accomplishing this.
What exactly do DNA transcription and translation entail?Transcription, the process by which DNA is converted into RNA, and translation, the process by which RNA is used to create proteins
What kind of RNA is produced when a message is transcribed from DNA?By means of the transcription and translation processes, messenger RNA (mRNA) is a type of RNA that carries genetic information from DNA to protein.
The tRNA and 5S rRNA genes, in particular, are transcribed by RNA polymerase III. 5S rRNA and tRNA are produced by RNA polymerase III.
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What is the frequency of a wave that has a velocity of 2m/s and wavelength of 12m/s
Answer:
The answer should be 0.1666667 but there is some problems with your question, A Wavelength cannot be measured by meters per second usually.
Explanation:
The reason why is because of how far wavelengths actually move and extend.
The primary difference between a community and an ecosystem is that an ecosystem includes . . .
A.biotic factors
B.abiotic factors
C.biosphere
D.populations
Explanation:
An ecosystem contains biotic and abiotic factors as well as populations.The only thing it does not contain is the biosphere because the biosphere actually contains all ecosystems where life exists.
the pancreas secretes digestive enzymes and hco3− into the small intestine to break down food and neutralize acidity.
The statement 'the pancreas secretes digestive enzymes and HCO3 into the small intestine to break down food and neutralize acidity' is true.
The pancreas can be described as the organs that secrete digestive enzymes as well as bicarbonate ions into the small intestine in order to facilitate the process of digestion. Apart from this, the pancreas also secretes hormones into the blood.
In the digestive juice that is produced by the pancreas, there are enzymes that break down carbohydrates, proteins, and fats all of which are majorly present in the food that we consume. The bicarbonate is produced in order to neutralize the acidity that was produced in the stomach as the stomach has a high concentration of HCl.
Although a part of your question is missing, you might be referring to this question:
The pancreas secretes digestive enzymes and HCO3− into the small intestine to break down food and neutralize acidity. true or false
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Many nutrient cycles are coupled and changes in one cycle will affect another. This means that a change in the amount of carbon dioxide fixed is intimately affected by the amount of __________.
Since many nutrient cycles are interconnected, modifications to one cycle will have an impact on another. This implies that the amount of nitrogen present in an ecosystem has a direct impact on changes in the amount of carbon dioxide fixed.
A recurring journey from the environment via one or more species and back to the environment is referred to as a "nutrient cycle."Despite its complexity, the N-cycle is undoubtedly the most crucial nutritional cycle to comprehend. This is due to two factors: In terrestrial (land) environments, N is typically the plant nutrient that restricts plant development the most.
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if dna is damaged or incompletely replicated in s phase, the inhibition of which of these molecules prevents the cell from entering m phase?
The cell cycle won't move on to the following phase. Therefore, the next division won't take place. Cell death will result from this.
If S phase is not completed, what happens?The faithful segregation of sister chromatids may be threatened by incompletely replicated or unresolved chromosomes from the S-phase that survive into mitosis, according to new research.
What takes place during the cell cycle's S phase?During the S phase, the cell makes a complete copy of the DNA in its nucleus. It also produces duplicate centrosomes, which are organelles that arrange microtubules. The centrosomes help to separate DNA during M phase.
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the abrasions on the skin caused by unburned gun powder striking the skin is called what? group of answer choices jacketing stippling stellate tearing rifling
Unburned gunpowder fragments striking the skin can create stippling. Stippling, in contrast to other things that may be deposited on the skin, including soot, cannot be removed by washing.
Are a gunshot wound and an abrasion?An abrasion rim, also known as the perimeter of abraded tissue, generally surrounds the persistent tract or cavity in gunshot wounds. Due to the lubricant that was deposited on the tissue during projectile penetration, the wound also has a grease collar.
What is the term for when you are scraped by a bullet?An abrasion collar, often referred to as an abrasion ring or abrasion rim, is a small band of stretched, abraded skin that develops quickly around projectile wounds like gunshot wounds.
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over – percent of plastic waste has never been recycled, and much of it ends up in oceans. scientists estimate that by 2050, ocean plastics will outweigh ocean – . a total of 9 billion tons of plastic has been generated since 1950, more than – for every person on the planet.
Over 90 percent of plastic waste has never been recycled, and much of it ends up in oceans.
Scientists estimate that by 2050, ocean plastics will outweigh ocean fish.
A total of 9 billion tons of plastic has been generated since 1950, more than one ton for every person on the planet.
What is Plastic waste?
Plastic waste is a form of waste that is made up of materials such as plastic bags, bottles, containers, packaging and other items that are not biodegradable. This waste is difficult to recycle and often ends up in landfills, oceans and rivers, where it can cause significant environmental damage.
What do you mean by Recycling?
Recycling is the process of converting waste materials into new, reusable materials. It is an important part of reducing our environmental impact and preserving natural resources. Recycled materials can be used to create new products and reduce the need for raw materials.
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order the steps in the clonal expansion of antibodies and the production of antibodies.
1. The Th cell detects the viral epitope presented by the b cell using its TCR.2. The Th cell's cytokines stimulate the B cell, which divides to form the memory and plasma cells.3. Antibodies produced by plasma cells can detect viruses.
What does clonal growth and selection mean?According to the hypothesis of clonal selection, random mutations that occurred during lymphocytes' initial maturation and proliferation led to unique antigen receptors developing on them before they were exposed to an antigen.Selected lymphocytes that have the required antigen receptor go through clonal proliferation after antigen presentation.
What causes clonal expansion to happen?The process through which daughter cells develop from a parent cell is known as clonal expansion.Many copies of the B cell that share affinity for and specificity for the same antigen are created during B cell clonal growth.
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which diagram demonstrates how crossing-over contributes to genetic variety during meiosis?
The exchange of genetic material that occurs during the development of germ cells is referred to as crossing over. The illustration that best illustrates crossing over is as follows:
The exchange of genetic material that occurs during the development of germ cells is referred to as crossing over. The illustration that best illustrates crossing over is as follows:
The process of genetic material switching during the development of reproductive cells is known as crossing over. The process of crossing over is crucial because it results in distinct combinations and variation in the daughter cells. Between prophase I and metaphase I, the procedure takes place.
Incorrect response causes:
A) The table that is provided shows the cross between two heterozygous genes.
B) The chromosomes are oriented at the equator plate during the metaphase of cell division, which is represented by the image.
D) The displayed graphic depicts DNA replication.
Consequently, the transition takes place during meiosis.
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A specialized cell in a tree leaf
what is this type of specialized cell?
A. Tracheid
B. Palisade cell
C. Guard cell
D. Osteocyte
Answer:
Palisade Cell
Explanation:
The leaf of a plant contains many different specialized cells. One example is the palisade cells, which form a layer near the top of the leaf. These cells are elongated, cylindrical in shape, and contain many chloroplasts.
What takes place in a cell’s mitochondria?
A:protein synthesis
B:photosynthesis
C:cellular respiration
D:DNA replication
Answer:
C: cellular respiration
Explanation:
It's when which energy is released from the foods such as sugars into the cell.
An error during M phase would be most likely to affect a multicellular
organism in what way?
A. The organism develops cells with too few or too many organelles.
B. The organism develops cells that are too small.
C. The organism develops cells with too few or too many
chromosomes.
D. The organism develops cells that are too large.
Answer: C. The organism develops cells with too few or too many
Explanation:
How does cholesterol help stabilize the plasma membrane in hot and cold temperatures.
Answer:
through raising or lowering the melting point
Explanation:
In High temperatures, cholesterol stabilises the plasma membrane through raising the melting point, meaning the degree of fluidity is kept the same. In Low temperatures, cholesterol intercalates between the phospholipid bi-layer and therefore prevents clustering.