Option 1 is Correct. Tonsils assist in catching bacteria and viruses that enter your throat, if you still have these lymphatic tissues.
Tonsils. The immune system also includes the tonsils. They can prevent pathogens from entering the body through the mouth or nose because they are situated near the throat and palate. Bean-shaped glands called lymph nodes are responsible for monitoring and purifying the lymph as it filters through them.
The cancerous and damaged cells are filtered out by the nodes. These lymph nodes also house immune system cells like lymphocytes that fight and eliminate germs and other dangerous elements in the fluid. Tonsils are lymphoid tissue aggregates that are important components of our immune system. They are located close to the entrances of the digestive and respiratory tracts.
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Correct Question:
If you still have these lymphatic tissues, they help trap bacteria and viruses that enter your throat.
1. Tonsils
2. Thymus glands
3. Peyer's Patches
4. Spleen and liver
5. Pancreas Patches
What are the 7 main functions of the skeletal system?
The 7 main functions of the skeletal system include supporting the body, facilitating mobility, safeguarding internal organs, storing minerals and fat, and producing blood cells.
A body system made up of bones, ligaments, cartilage, and other tissues that serve vital purposes for the human body is referred to as the skeletal system. In addition to supporting the body and facilitating mobility, the skeletal system also protects internal organs, stores minerals and fat, and produces blood cells.
The body's internal support system, called the skeleton, is made up of bone tissue known as osseous tissue. Cartilages, a semi-rigid type of connective tissue, providing flexibility and smooth surfaces for movement in the regions of the skeleton where entire bones move against one another, for instance, joints like those of the shoulder or between the bones of the spine.
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What are examples of the "General Senses"?
The examples of the general senses are the touch, sight, hearing, smell and taste.
There are five general senses in humans: touch, sight, hearing, smell and taste. Our body has various receptors in all of its organs which can recognize the stimulus and regulate our five senses. The impulse from these receptors is sent to the brain first where the processing takes place, and the action is taken immediately as per the requirement.
Sensing organs are specialised organs that help us understand our surroundings. They are essential to our existence and the only thing that enables us to perceive our surroundings. Our associations and interactions with the world are controlled by these senses. Humans have five different senses, including: eyes, ears, nose, tongue, and eyes.
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explain examples of natural selection, including Darwin’s finches, the peppered moths of Manchester, England, and the swifts and their clutch size, noting the role of selective pressures/agents in the environment and the impact of differential reproductive success.
Answer:
Darwin's finches are a classic example of natural selection. The finches evolved over time to adapt to the environment in which they lived, primarily due to changes in the size of the beaks. Different beak sizes allowed the birds to survive in different environments and eat a wider variety of food, leading to greater reproductive success.
The peppered moths of Manchester, England are another example of natural selection. Due to industrial pollution, the environment changed and the light-colored moths became more visible to predators than their dark-colored counterparts. This meant that the dark-colored moths were more successful at reproducing, leading to a shift in the population over time in favor of the darker moths.
Finally, swifts have also been used as an example of natural selection. Swifts have evolved over time to have smaller clutch sizes, meaning that fewer eggs are laid at once. This allows them to invest more energy into each egg, leading to higher survival rates for those eggs. This is an example of natural selection in action, as the swifts with the smaller clutch sizes are more successful than those with larger ones. All of these examples demonstrate the role of selective pressures/agents in the environment and the impact of differential reproductive success on the population over time.
Define Convection and Convection Current. Give an example.
Answer:
✿´`·.·´`✿Convection currents are movements of fluid caused by a temperature or density difference within a material. Convection currents are only seen in gases and liquids because particles within a solid are fixed in place. Warm air rising toward a house's ceiling or attic is a simple example of convection currents.
Which is the most accurate and reliable means of taking body temperature?
A. oral
B. aural or tympanic
C. axillary
D. rectal
The most precise and trustworthy method for measuring body temperature is rectal.
How can you take your oral temperature in the most precise way?The most reliable indicator of the body's temperature is a person's rectal temperature. Temperature measurements in the mouth and axilla range from 1/2 to 1°F. Your tongue should be covered by the thermometer's tip. When the thermometer beeps to signify completion, keep your mouth shut around it for the prescribed amount of time. To read the number, remove the thermometer.
Which temperature is more reliable: the axilla or the mouth?The most inaccurate temperatures are typically those collected from the armpit. As long as the mouth is closed while the thermometer is in place, oral readings are typically accurate for older children and adults.
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Choose the list below that contains the substances required by typical nitrogen-fixing cyanobacteria.A. Oxygen, sulfur, light, water, and some mineralsB. Carbon dioxide, sulfur, light, water, and some mineralsC. Nitrogen, light, water, and some mineralsD. Carbon dioxide, ammonium, water, light, and some mineralsE. Carbon dioxide, nitrogen, water, light, and some minerals
The substances required by typical nitrogen-fixing cyanobacteria is: E.) Carbon dioxide, nitrogen, water, light, and some minerals.
What is cyanobacteria?Cyanobacteria is also known as Cyanophyta. They are a phylum of gram-negative bacteria that obtain energy from photosynthesis. The name cyanobacteria refers to their color, which forms the basis of cyanobacteria's common name, blue-green algae, although they are not scientifically classified as algae.
Exposure to some toxins like cyanobacterial toxins can harm your liver and kidneys. If you think you may have symptoms caused by harmful algae, cyanobacteria, or their toxins, then contact your healthcare provider or poison control center.
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Is ice cream good for your body? why?
Ice cream is definitely good for your body because it contains vitamin K that prevents blood clotting.
Why ice cream is better for you?The consumption of ice cream at a normal level significantly benefits your health. This is because it is so refreshing, versatile, affordable, and a great way to get a serving or two of fruit. It's naturally lower in fat & sugar in comparison to store-bought vegan ice creams.
Experts suggest that the consumption of ice cream in a moderate and mindful way typically affects your health positively. In excess, these foods might displace nutritious choices in your diet and increase the risk of chronic conditions like heart disease, high cholesterol, obesity, and diabetes over time.
Therefore, ice cream is definitely good for your body because it contains vitamin K that prevents blood clotting.
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True/false?cyclic amp phosphodiesterase is an enzyme that catalyzes the conversion
True. An enzyme called cyclic amp phosphodiesterase is responsible for the conversion. In this study, the pathogenic bacteria Vibrio vulnificus was used to describe the enzyme.
CAMP phosphodiesterase (CpdA), which catalyzes the conversion of cAMP to AMP. Cyclic AMP (cAMP) phosphodiesterase-4 (PDE4) enzymes break down cAMP and support the compartmentalization of cAMP signaling by concentrating in specific intracellular locations and protein complexes.
The only enzyme that converts ATP into the second messenger 3′:5′-adenosine monophosphate (cyclic AMP) is adenylate cyclase (AC). Almost all eukaryotic cells can change how they operate by activating cyclic AMP-dependent protein kinase or cyclic AMP-gated ion channels. A membrane-bound enzyme called adenylyl cyclase produces the nucleotide cAMP inside of the cell from ATP.
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The vascular cambium generates ___ to the inside and ___ to the outside.
(phloem cells/xylem cells/cork cells/cork cambium/vascular cambium)
To the interior and outside, respectively, the vascular cambium produces xylem and phloem cells.
What particular area of the vascular tissue is created outside the cambium?Along the cambium ring's outer and inner edges, respectively, secondary xylem (i.e., wood) and secondary phloem form. Along older stems and roots, the periderm, a secondary dermal tissue produced by the cork cambium, replaces the epidermis.
What is produced by the cambial ring's inner and outer sides?The intra- and interfascicular cambium of dicotyledonous plants combines to form a ring of cambium known as the vascular cambium, which produces secondary xylem on the inner side and secondary phloem on the outer side.
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What can an elevated PSA mean?
An elevated PSA mean an enlarged or inflamed benign prostate gland.
As there are other causes of elevated PSA in addition to prostate cancer, an enlarged or inflamed benign prostate gland may be the cause. Benign prostatic hyperplasia, or the growth of the prostate that most men experience as they age, frequently causes high PSA readings.
The prostate produces a protein called PSA that is used to monitor the development of prostate cancer that has already been diagnosed. For the majority of patients, the PSA level is a very good indicator of recognised disease. Yet, there has long been debate concerning the usefulness of PSA as a tool for prostate cancer screening.
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The double helix of DNA is composed of building blocks called A. amino acids. B. monosaccharides. C. phospholipids. D. disaccharides. E. nucleotides.
The double helix of DNA is composed of building blocks called nucleotides. Here option E is the correct answer.
A nucleotide is a molecule made up of three components: a nitrogenous base, a sugar molecule, and a phosphate group. In DNA, there are four types of nitrogenous bases: adenine, guanine, cytosine, and thymine, which form base pairs and hold the two strands of the double helix together.
The sugar molecule in DNA is deoxyribose, which gives the molecule its name: deoxyribonucleic acid. The phosphate group links the sugar molecules and provides a negative charge that helps to stabilize the DNA structure.
The precise sequence of nitrogenous bases along the length of the DNA molecule encodes the genetic information that is passed on from one generation to the next. The genetic code is read by cellular machinery and used to synthesize proteins, which are the workhorses of the cell.
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A trait whose development requires the action of thousands of genes but whose variation is due to variation at only two loci is
A.) Extranuclear
B.) Digenic
C.) Polygenic
D.) Meristic
A trait whose development requires the action of thousands of genes but whose variation is due to variation at only two loci is Digenic trait.
What are Digenic traits?Digenic traits are genetic traits that are controlled by two genes. Unlike many other traits, digenic traits are not solely determined by the interactions of the alleles of one gene. Digenic traits are often associated with diseases, and researchers have found that many diseases that were previously thought to be caused by mutations in a single gene are actually the result of mutations in two or more genes.
Digenic traits can be inherited in a variety of ways, including recessive inheritance, dominant inheritance, and additive inheritance. Research into digenic traits is important for understanding the genetic basis of disease and for developing treatments and cures for genetic disorders.
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using a calibrated microscope, when do you get better precision when determining the size of a specimen?
At greater magnifications, we can more accurately measure the size of a specimen by using a calibrated microscope.
Using a calibrated microscope, you get better precision when determining the size of a specimen at higher magnification levels.
At higher magnification levels, the specimen appears larger in the field of view, and the microscope's calibration markings are closer together, resulting in smaller measurement errors.
Additionally, higher magnification levels often correspond to higher resolving power, allowing for greater accuracy in distinguishing the boundaries of the specimen being measured.
However, it's important to note that at higher magnification levels, there may be a trade-off between precision and accuracy, as minor irregularities in the specimen or the microscope's optics may become more significant at these levels.
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exons are parts of genes that code for specific proteins. True or False
Exons are the sections of genes that code for certain proteins, which is incorrect.
Do exons make up genes that encode particular proteins?Exons are the coding regions of an RNA transcript or the DNA that encodes it that are converted into proteins. Intervals of DNA called introns, which do not code for proteins, can be used to divide exons.
Is intron or exon coding?Many genes' protein-coding regions are divided into smaller sections called exons, which are separated from one another by non-coding regions called introns. These exons and introns are incorporated into the initial messenger RNA products during gene transcription.
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A cell has few proteins in it; the fluid it is in has a high density of proteins. What is necessary for the cell to move proteins outside of itself?.
Exocytosis is a type of bulk transport in which substances are moved in membrane-bound vesicles that affix to the plasma membrane from within to outside of the cell.
What is the process through which nutrients cross cell membranes to enter and exit cells known as?
The movement of particles in a substance from a high concentration to a low concentration is called diffusion.
What is the name of the mechanism through which food can provide cells with the energy they need to make ATP?
The process through which food energy is transformed into energy that the body's cells can utilise is called cellular respiration. ATP receives the energy from glucose that has been stored.
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plates i and iii were included in the experimental design in order to
To show that the E.coli cultures were viable, plates I and iii were incorporated into the experimental plan.
Which meiotic stage is most frequently linked to incorrect chromosomal segregation and Down's syndrome?Chromosome 21 aneuploidy, or Down syndrome, is the most prevalent aneuploid disorder in liveborn children and is linked to advanced mother age. Typically, maternal meiosis I nondisjunction events cause it. Gametes with nondisjunction have either too few or too many chromosomes.
Which meiotic stage is most frequently linked to incorrect chromosomal segregation and Down's syndrome?Chromosome 21 aneuploidy, or Down syndrome, is the most prevalent aneuploid disorder in liveborn children and is linked to advanced mother age. Typically, it comes from pregnancy meiosis events I nondisjunction. Gametes with nondisjunction have either too few or too many chromosomes.
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A person was involved in a car accident and became unconscious due to excessive blood loss explain briefly how the blood lost will be restored
When a person loses a significant amount of blood due to an injury or accident, their body's first response is to try to stop the bleeding and prevent further blood loss. Once the bleeding has been controlled, the body will begin to restore the lost blood volume through a process called hemostasis.
Hemostasis involves several steps that work together to repair damaged blood vessels, stop bleeding, and restore blood flow to the affected area. These steps include:
Vasoconstriction: The damaged blood vessels will narrow, or constrict, to reduce the flow of blood to the affected area.
Platelet plug formation: Platelets are small, sticky cells in the blood that will clump together to form a plug over the injured area, sealing the blood vessels and stopping the bleeding.
Blood clotting: The injured area will also trigger a series of chemical reactions that result in the formation of a blood clot, which further seals the wound and stops the bleeding.
Fibrinolysis: Once the bleeding has stopped and the wound begins to heal, the body will break down the blood clot through a process called fibrinolysis.
After the bleeding has been controlled and the hemostasis process has begun, the body will start to restore the lost blood volume. This is done through the production of new blood cells, which are produced in the bone marrow. The new blood cells will eventually replace the lost blood volume, restoring the person's blood pressure, oxygen supply, and overall health.
In some cases, a blood transfusion may also be necessary to restore the lost blood volume more quickly. This involves transferring blood from a donor to the injured person, replacing the lost blood cells and helping to restore the person's health more rapidly.
Answer:
In order to restore blood lost from a car accident, the individual would need to receive a blood transfusion. This involves intravenously injecting donated blood of the same blood type as the patient into their body. A transfusion helps replace the lost red blood cells which carry oxygen throughout the body, restoring the lost volume and aiding in healing. Furthermore, depending on the severity of the injury, the individual may also require other treatments such as surgery or medications to help stop bleeding and prevent infection.
lavas erupting from composite cones are generally ________-rich, making them very viscous.
Rock formations streaming from composite cones typically provide a lot of silica, which makes them quite viscous.
What is frequently prevalent in the lava that stratovolcanoes erupt?Lava flowing from stratovolcanoes typically heats up and settles before spreading far because of its high viscosity. Fessic magma with high to moderate silica content, like that seen in rhyolite, basalt, or andesite, and lower proportions little less fluid mafic magma are often what create this lava.
Why are the explosive levels in composite volcanoes higher?Composite volcanoes are also referred to as stratovolcanoes since they are made up of shifting layers (Figure 8.22). Typically, richer and more viscous magmas are used to create stratovolcanoes. Viscous lava creates more pressure, which will in turn tends to cause explosive eruptions.
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Many cell organelles, most notably the nucleus, are anchored by _____ which are assembled from a diverse class of proteins.
Many cell organelles, including the nucleus, are anchored by cytoskeletal structures called microtubules, which are assembled from a diverse class of proteins known as tubulins.
Microtubules are a critical component of the cytoskeleton, which provides mechanical support to cells and plays a crucial role in processes such as cell division, intracellular transport, and cell signaling. Microtubules are composed of repeating subunits of α-tubulin and β-tubulin proteins, which assemble into long, hollow tubes. The microtubules provide a scaffold for other organelles to be transported around the cell or positioned in specific locations, such as the centrosomes which are responsible for organizing the cell's microtubule network. Microtubules also play a crucial role in mitosis, where they help to separate chromosomes into the daughter cells during cell division.
Overall, the cytoskeleton and its components, such as microtubules, play an essential role in maintaining the structural integrity of cells and providing a framework for cellular processes.
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if the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells ________.
If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells, contractions would last as long as the refractory period.
What is skeletal example?An example of skeletal muscles include any that are attached to your bones, or skeletal system. This allows you to move. Examples would be your biceps on the tops of your arms, triceps on the bottoms of your arms, calves on the back of your lower legs, and pectoral muscles in your chest.
What is skeletal in biology?The skeletal system is the main framework that gives your body its shape. Bones and connective tissues including cartilages, tendons, and ligaments are the main components of the skeletal system.
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Primary production in this coastal ecosystem is strongly influenced by nutrient supply from the adjacent shelf via surface water mass intrusions or upwelling of nutrient-rich deep waters. (T/F)
The fertilizer supply from the nearby shelf via surface water mass intrusions or upwelling of nutrient-rich deep waters has a significant impact on primary production in this coastal ecosystem.
What is a straightforward explanation of ecosystem?An environment is a place where so many types of living creatures interact to create a sphere of life, encompassing plants, wildlife, and some other species. Ecosystems are made up of both biotic (or alive) and abiotic (or nonliving) components.
Why is the ecosystem crucial?Healthy ecosystems keep our soil in good condition, recycle nutrients, keep the air clean, manage our water supplies, control the climate, and give us food. They supply the necessary resources and raw materials for making medications and other goods. All civilisations are built on them, and they support our economies.
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50 points
Please help
D. The model is limited by not accounting for natural errors during DNA replication.
What is the function of afferent and efferent neurons?
Afferent neurons, also known as sensory neurons, are responsible for carrying sensory information from the body's tissues and organs to the central nervous system (CNS), which includes the brain and spinal cord.
These neurons are activated by stimuli such as heat, light, touch, and sound, and they carry the signals to the CNS for processing and interpretation.
Efferent neurons, also known as motor neurons, are responsible for carrying signals from the CNS to the body's muscles and glands. These neurons control voluntary movements, such as walking and speaking, as well as involuntary movements, such as heart rate and digestion.
Together, afferent and efferent neurons make up the peripheral nervous system (PNS), which is responsible for transmitting information between the CNS and the rest of the body. This communication allows the body to respond to external stimuli and maintain homeostasis, or balance, in its internal environment.
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two living species can share similar traits not inherited by a common ancestor.
True or false?
A similarity between creatures known as homoplasy is one wasn't passed down through their common ancestor.
Species with such similar ancestries share traits?It's likely that each species received these characteristics from such a common ancestor if different species have similar physical characteristics. Homologous structures are traits that are comparable to each other because they shared an ancestor. Structural homology refers to the shared bone structure in the forelimbs of mammals like humans, birds, and whales.
Do whales and birds share a same ancestor?Whales, lizards, humans, and birds all have basic limb configurations in common. But how did such different creatures end up with the same kind of limb. The response is that, similar to how cousins may get a trait from their grandfather.
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Which two of the three types of muscles in the body are involuntary?
Answer: The two types of muscles in the body that are involuntary are smooth muscle and cardiac muscle.
Explanation:
In gel electrophoresis, DNA fragments migrate toward the negative pole of the electric field.
true/false? Explain.
The statement about the gel electrophoresis, DNА frаgments migrаte towаrd the negаtive pole of the electric field is true because since frаgments of double-strаnded DNА аre negаtively chаrged becаuse of the ionized phosphаte groups аlong the bаckbone, the molecules move towаrd the positive pole of the electric field.
Thus, the given statement is true.
What is gel electrophoresis?Gel electrophoresis is а technique used to sepаrаte DNА frаgments аccording to their size. DNА sаmples аre loаded into wells (indentаtions) аt one end of а gel, аnd аn electric current is аpplied to pull them through the gel. DNА frаgments аre negаtively chаrged, so they move towаrds the positive electrode. Becаuse аll DNА frаgments hаve the sаme аmount of chаrge per mаss, smаll frаgments move through the gel fаster thаn lаrge ones.
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Why is there less oxygen in the water near the ocean’s surface than in the water at lower depths?
A.
Oxygen is very heavy and sinks to the ocean floor.
B.
A lot of sea life consumes oxygen at the surface level.
C.
Most of the photosynthesizing organisms live on the ocean floor.
D.
Oxygen is absorbed at the surface level but cannot remain there.
Oxygen is absorbed in the surface level but cannot remain there, is the correct reason for less oxygen in the water near the ocean’s surface than in the water at lower depths.Therefore, the correct option is D.
What is the concentration of dissolved oxygen in seawater?The concentration of dissolved oxygen in seawater can vary depending on various factors like temperature, salinity, pressure, and depth. The reason for lower oxygen levels at the ocean's surface is that oxygen is absorbed from the atmosphere into the water through diffusion, a process in which molecules move from areas of high concentration to areas of low concentration.
This means that the surface water, which is in contact with the atmosphere, can absorb oxygen from the air.Hence, there is less amount of oxygen on the surface than at the depth of the seawater. Therefore, the correct option is D.
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Is the following statement true or false?
Mitotic cell division can be a mode of reproduction for certain organisms.
Mitotic cell division can be a mode of reproduction for certain organisms is referred to as a true statement.
What is Mitosis?This is referred to as the process of cell division wherein the chromosomes replicate and get equally distributed into two daughter cells. Meiosis on the other hand is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells.
In unicellular organisms such as bacteria, mitosis helps in asexual reproduction as it produces an identical copy of the parent cell which is therefore the reason why true was chosen as the correct choice.
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Prokaryotes are completely indispensable to which chemical cycle?A. CarbonB. PhosphorusC. WaterD. SulfurE. Nitrogen
Prokaryotes are completely indispensable to nitrogen cycle
Prokaryotes have a variety of functions in the nitrogen cycle. Nitrogen-fixing bacteria turn atmospheric nitrogen gas into ammonia in the soil and in the root nodules of some plants. Ammonia is converted to nitrites or nitrates by nitrifying bacteria.
By turning atmospheric nitrogen into the plant-useable form of ammonia and fixing nitrogen from the atmosphere into different forms of nitrogen sources, prokaryotes play a significant part in the nitrogen cycle.
In prokaryotes, the use of external nitrogen sources and intracellular production of nitrogen-containing molecules are handled by a huge variety of enzymes that are expressed in nitrogen cycle.
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Organize the following layers of the epidermis from superficial to deep.
1.Stratum Corneum
2.Stratum Spinosum
3.Stratum Granulosum
4.Stratum Basale 5.Stratum Lucidum
The epidermis, basement, and hypodermis, which make up its three layers .The palms thicker skin contains stratum lucidum, which is composed of two to three cell layers.
How do stratums work?A layer of cells or tissue any material layer, especially one comprising many parallel layers a level of ocean or atmosphere that is either arbitrarily or naturally defined, such as in mixed-use developments with residential apartments above and shopping areas below.
Describe a tissue?There might be a lot of this in some tissue and not much in others. Even the organs are formed of tissues, as are all other body parts. Organs are made up of tissue groups. There are various tissue kinds.
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