The right ventricle contracts next, which forces blood up through the pulmonary semilunar valve, which is also known as the pulmonary valve. One of the four valves that regulate blood flow in the heart is the pulmonary valve. It is situated between the artery that supplies blood to the lungs and the lower right heart chamber.
The pulmonary valve typically functions as a one-way door from the right ventricle of the heart to the lungs. The pulmonary valve allows blood to go from the right ventricle to the pulmonary artery, where it picks up oxygen before entering the lungs and carrying it to the rest of your body.
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The most radiosensitive period during pregnancy for radiation induced congenital abnormalities is during the _____________________.
The first trimester of pregnancy is the most radiosensitive time for radiation-induced congenital abnormalities.
An abnormality that is present at birth is what?A structural or functional anomaly that develops intrauterinally is referred to as a congenital anomaly. These illnesses, which are also known as birth defects, congenital disorders, or congenital abnormalities, arise during pregnancy and can be diagnosed before or at delivery as well as later in life.What common anomalies of birth are there?Down syndrome, neural tube problems, and heart defects are the most prevalent serious birth disorders. The precise causes of birth malformations are frequently difficult to pinpoint, even if they may be due to one or more genetic, viral, dietary, or environmental factors.
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In addition to burning fossil fuels, humans return co2 to the atmosphere faster than it can be removed by:__________
In addition to burning fossil fuels, humans return co2 to the atmosphere faster than it can be removed by plants.
What are fossil fuels?Fossil fuels are created from decaying plants and animals. These fuels may be burned to provide energy and are present in the crust of the Earth. Fossil fuels include things like coal, oil, and natural gas.
Fossil fuels are used to create energy; they are burned in homes to create heat, in huge power plants to create electricity, and they are also used to power engines.
Fossil fuel air pollution can result in acid rain, eutrophication (extra nutrients that can impact aquatic ecosystems by lowering oxygen levels), damage to crops and forests, and harm to wildlife. Fossil fuels contribute to water pollution through oil spills and fracturing fluids.
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The full meaning of WAI
Answer:
WA means Withdrawn Administratively.
Explanation:
The classic steps for identifying an endocrine gland include removing the suspected gland, replacing the hormone, and which other step?
The glands that make up the endocrine system are a collection of organs. These glands, which can be found all over the body, produce and secrete hormones.
Hormones are substances that communicate with your organs, skin, muscles, and other tissues through your blood to coordinate various bodily functions. These messages instruct your body on what to do when. The endocrine system is made up of several glands. Your brain contains the hypothalamus, pituitary, and pineal glands. Your neck contains the parathyroid and thyroid glands. The pancreas is located beneath your stomach, the adrenals are on top of the kidneys, and the thymus is situated between your lungs.
Your body's endocrine system constantly checks the level of hormones in your blood. In order to transmit their messages, hormones target specific cells and lock into them. When your hormone levels increase, the pituitary gland signals other glands to stop manufacturing and releasing hormones. The pituitary gland has the ability to tell other glands to manufacture and release additional hormone when levels fall below a certain threshold. Homeostasis is a process that functions similarly to your home's thermostat.
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All other things staying the same, a high growth firm will have a relatively ______ need for external financing than a low growth firm.
All other things staying the same, a high growth firm will have a relatively lower need for external financing than a low growth firm.
What is Financing?This is defined as the various ways and methods in which funds are provided or raised for various types of activities such as business activities, investments etc.
A high growth firm will have a relatively lower need for external financing than a low growth firm because the available resources will be sufficient enough for the daily operations of the company. This is therefore the reason why it was chosen as the most appropriate choice.
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An advantageous mutation is more likely to get fixed in a population through genetic drift than is a deleterious mutation. True or false?.
It is false that an advantageous mutation is more likely to get fixed in a population through genetic drift than is a deleterious mutation.
Genetic drift is described as the random change in the frequency of a mutation in a population from generation to generation induced by the population's finite size. Most beneficial mutations are lost owing to genetic drift; however, some somewhat damaging mutations may become permanent.
It takes a long time to detect a significant influence of genetic drift on allele frequencies in large, unthreatened populations; genetic diversity indicates a balance between mutation and natural selection. When natural selection is much less than one, drift can counter selection, and alleles behave as if they are neutral. As a result of this process, small populations may exhibit more maladaptation (i.e., a mismatch between environment and mean phenotype) than larger populations. Mildly harmful mutations, on the other hand, will likely accumulate in small populations since selection is unsuccessful at eliminating them. This can result in a'mutational meltdown,' in which harmful mutations drive down population growth rate (and size), rendering the population more susceptible to subsequent mutation fixation.
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A technique for determining protein structure that requires crystals of the protein is ___.
A technique for determining protein structure that requires crystals of the protein is X-ray crystallography.
The structure of protein can be of four types: (a) primary structure; (b) secondary structure; (c) tertiary structure and (d) quaternary structure. The primary structure is the most simple one with a linear chain of amino acids. Secondary structure can be alpha helix or beta sheets, tertiary structure is the folded state of secondary structure and quaternary structure is the combination of two or more tertiary structures.
X-ray crystallography is the technique through which the 3-D structure of a protein crystal can be determined. The crustal of protein is a highly purified form. Atomic as well as molecular structure can be determined by this technique.
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explain how atp is formed and broken down in the body
Answer:
ATP is able to power cellular processes by transferring a phosphate group to another molecule (a process called phosphorylation). This transfer is carried out by special enzymes that couple the release of energy from ATP to cellular activities that require energy.
The effects of biota in soil formation are closely related to, and hard to distinguish from, the effects of?
The effects of biota in soil formation are closely related to, and hard to distinguish from, the effects of climate.
Even within a backyard, there are differences in the type of soil that exists. They differ in origin and development process. Different types of soils are shaped by the interaction of five key factors: climate, organisms, topography (landscape), matrix and time. The rate of chemical reactions is affected by temperature and humidity, which affects weather and the rate at which dead animals decompose. Soil develops faster in warmer and more humid regions than in cold or dry regions. One of the most important climatic variables for soil formation is precipitation. Large soil particles are broken down into smaller particles more quickly by bacteria, plants, animals, etc.The correct answer is climate.
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Jay built a model of the solar system. What sort of information will his model be able to explain? What type of information would his model be unable to explain?
Answer:
the answer is
Explanation:
his model will be able to explain these
a) the positions of sun and planets
b) the modern solar system including planets
c) the distances between each planet from the sun
d) how many moon does each planet has
his model won't be able to explain these
a) how does the movement around the sun accur
b) what times and seasons of the year does the planet change
c) what's the times and ellipse could happen
.
hope this help if it does help I'd be happy if you follow and give me the brainliest answer
The vital ability of an organism to take certain actions when changes occur in its immediate environment is called ________.
The vital ability of an organism to take certain actions when changes occur in its immediate environment is called Adaptation
What is Adaptation ?In biology, there are three related definitions of adaptation. First, natural selection, a dynamic evolutionary process, adapts organisms to their environments, improving their evolutionary fitness. Second, it is a state that the populace attained as a result of that process.
The streamlined bodies of aquatic fish and mammals, the light bones of flying birds and mammals, the long, dagger-like canine teeth of carnivores, and the long necks of giraffes for feeding in the tops of trees are a few examples. According to all biologists, organismal characteristics frequently represent adaptations.Learn more about Adaptation here:
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Diatoms, such as members of the genus navicula, belong to which major lineage of eukaryotes?.
Diatoms, such as members of the genus navicula, belong to stramenopila major lineage of eukaryotes.
Stramenopile:- Stramenopiles are group of organisms, that consists of stiff tripartite external hairs and flagella. Stramenopile is also known as heterokonts. It has both photosynthetic and nonphotosynthetic cells. Diatoms, chrysophytes, brown algae and some protozoa are included in the stramenopila kingdom. As stramenopiles are neither fungi, animals nor plants, they are eukaryotes.
Navicula:- Navicula is a genus of diatom algae, whose cells are boat-shaped.
Thus we can conclude that, diatoms such as members of the genus navicula, belong to stramenopila major lineage of eukaryotes.
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The barrier between the intracellular and extracellular fluid compartments in an animal or plant is the:________
The barrier between the intracellular and extracellular fluid compartments in an animal or plant is the plasma membrane.
The plasma membrane or cell membrane is a double membraned cell organelle that surrounds and protects the cell and other cell organelles. Both prokaryotic and eukaryotic cells have a cell membrane.
The plasma membrane is about 5 - 8 nm in thickness and is composed of proteins, lipids and carbohydrates that come together to form a flexible bilayer. This lipid bilayer gives the cell membrane its ability to separate intracellular and extracellular fluids.
The plasma membrane also plays a role in signalling and communication between cells and anchors the cytoskeleton to provide cell shape and maintain cell potential.
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What tissue acts as a firm, protective packing around and between organs, bundles of muscle fibers, and nerves?
The Adipose tissue acts as a firm, protective packing around and between organs, bundles of muscle fibers, and nerves. Adipose tissue serves as a key metabolic component in the control of whole body energy homeostasis. While the brown adipose tissue stores lipids for cold-induced adaptive thermogenesis.
Other organs use the white adipose tissue as a vital energy source. In addition to protecting the body from the cold and the heat, cushioning sensitive organs, and secreting hormones and biological chemicals, its main job is to store energy. On the other side, neonates and foetuses tend to have more brown adipose tissues.
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Which three of the following entities are acellular?.
a) prions archaea
b) viroids bacteria
c) viruses protists
d) fungi
Answer:
Prions archea, viroids bacteria, viruses protists are acellular while fungi is cellular.
While viruses have indeed been closely researched for more than a century for infections of people and animals, most viruses, particularly those that infect microorganisms, are still poorly understood.
Pathogenic RNA molecules are known as viroids. Contagious protein particles are identified as prions. Viruses are larger than that of viroids. Viroids are larger than prions in size.
Molds, wild yeasts, as well as mushrooms are examples of fungi. Numerous fungi are multicellular and also have nuclei in their cells. A protein-encased DNA or RNA core defines viruses being non - cellular organisms. Some scientists disagree with the notion that viruses are living things.
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Each peroid of the periodic table begins on the left with a:
very active metal
metalloid
rare-earth metal
Answer:
Rare Earth medals
Explanation:
___can be separated by physical methods can only be separated by chemical methods and __ cannot be broken down further.
Mixtures can be separated by physical methods can only be separated by chemical methods and elements cannot be broken down further.
Physical methods can be used to separate mixtures, especially mixtures of solids. It is worth of note that physical methods can also be used to separate liquid mixtures. For instance, the fractional distillation of petrol is a physical process. Chemical procedures can separate compounds, but components cannot be broken down further. In other words, chemical methods/reactions can split a complex into simpler compounds. Chemical processes or physical mechanisms cannot break down elements into simpler compounds. Also, note that elements are further divided into electron, proton and neutron but this separation is neither by physical or chemical methods.
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Biologists suspect that endosymbiosis gave rise to mitochondria before chloroplasts because?
Biologists suspect that endosymbiosis gave rise to mitochondria before chloroplasts because several eukaryotes lack plastids, but all eukaryotes contain mitochondria.
Endosymbiosis- Endosymbiosis is a symbiotic connection in which one organism lives inside the other. The term "primary endosymbiosis" describes the first time an ancient eukaryotic cell internalized prokaryotes, giving rise to the mitochondria and chloroplasts.
Eukaryotes- Every creature or cell with an identifiable nucleus. The nucleus of a eukaryotic cell, which houses the well-defined chromosomes (bodies holding the genetic material), is surrounded by a nuclear membrane.
Prokaryotes- Prokaryotes are creatures without a nucleus or other organelles in their cells. Bacteria and archaea, two separate groupings of prokaryotes with allegedly independent evolutionary histories, are separated into.
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The ________ is the liquid portion of the cell between the plasma membrane and nucleus.
The cytoplasm is the liquid portion of the cell between the plasma membrane and nucleus. The cytoplasm is anything between the plasma membrane and the nuclear envelope in eukaryotic cells with nuclei. The cytoplasm in prokaryotes, which lack a nucleus it simply refers to the anything contained inside the plasma membrane.
The lipid bilayer that surrounds the entire cell is known as the cell cytoplasm membrane. The nuclear membrane, on the other hand, completely encircles the nucleus. The cell membrane is a single the continuous sheet. The cell membrane controls the passage of materials into and out of the cell.
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Question 5(Multiple Choice Worth 3 points)
(02.02 MC)
How is Earth's surface most likely to change in a place that experiences extensive animal activity?
Sand dunes will be formed due to deposition of sediments.
Soil will loosen due to vast network of underground tunnels.
Cracks will appear in rocks due to freezing and thawing of water.
Rocks will break due to repeated abrasion and mechanical stress?
Answer:B) soil will loosen due to vast network of underground tunnels.
Explanation:
Which layer of the atmosphere holds the ozone layer?
Answer here
__________
Answer:the stratosphere
Explanation:
Answer:
The ozone layer is one layer of the stratosphere, the second layer of the Earth's atmosphere
What is the theoretical diffraction limit of resolution of a light microscope used to look at a sample through oil?
The theoretical resolution limit of a light microscope being used examine a sample while it is in oil is 261 nm.
A light microscope's resolution is limited to between 0.4 and 0.7 micrometers, or half the wavelength of visible light. The objects are at most 0.2 m away when we can see green light (0.5 m).
Using a green light of 514 nm, an oil immersion objective with such a NA of 1.45, and a condenser with a NA of 0.95, the (theoretical) limit of resolution is 261 nm. As was already said, more detail can be resolved when imaging a specimen with a shorter wavelength of light in a microscope.
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Which organelles contribute to synthesizing protein hormones and packaging them into secretory vesicles?
The organelle that contributes to synthesizing protein, hormones and packaging them into secretory vesicles is the Golgi complex.
In the field of science, the Golgi complex can be described as a membrane-bound organelle that is made up of cisternae. The cisternae are arranged in sacks in the Golgi complex
The Golgi complex is actively involved in synthesizing, modifying, and packaging of proteins into vesicles so that they can successfully be transported to their desired locations.
The Golgi complex is present near to Endoplasmic reticulum of a cell so that as soon as the proteins are made, the Golgi complex can carry out the process of processing them.
The Golgi complex is named after the scientist who was known for the discovery of this organelle, Camillo Golgi.
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What characteristics make a particular molecule organic? select the two answers that are correct.
Organic molecules are more complex than inorganic molecules. They generally have carbon hydrogen and carbon oxygen bonds.
What are organic molecules?Organic molecules generally have carbon, oxygen and hydrogen bonds. Organic chemistry is a branch of chemistry that deals with organic chemistry.
Organic molecules are compounds with complicated structures. Carbohydrates, lipids and proteins are some kind of organic molecules. Organic molecules are generally larger than inorganic molecules.
Carbon chain in organic molecules can be straight, branched or ring shaped. This compounds have some functional groups such as hydroxyl, methyl and carbonyl.
Therefore, Organic molecules are more complex than inorganic molecules. They generally have carbon hydrogen and carbon oxygen bonds.
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How do you describe Ammonia in 4-5 words without using any of the 5 scenes so like taste smell sight things like that.
Answer:
an inorganic compound NH3
5. Why are SI units used so often in science?
a.
Factors of 10 are easier work with mathematically.
b. SI units are bigger than English System units.
Factors of 3, 12, and 5,280 are easier to remember.
d. SI units are more accurate than English System units.
C.
The conversion foot
6
The SI units are preferred because factors of 10 are easier to work with mathematically.
What is the SI unit?We know that there are units that are common to many countries such as the English units and the American units. Now we know that the plentitude of units makes it confusing to use and hence there is a lack of consistence in the reportage of scientific data.
Hence, we know that it is common for many scientists to report research in the SI unit for the scientific community. Hence the SI units are so common in science because factors of 10 are easier to work with mathematically.
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Blood vessels become _______________ and more _________________ enter the damaged tissue.
Blood vessels become wider (dilate), allowing and more blood to enter the damaged tissue.
What are blood vessels and its function?Blood is delivered to human tissues by blood arteries, which act as conduits or channels. Two tube-like closed systems comprised of the vessels start and stop at the heart. Blood is transported from the right ventricle to the lungs and back to the left atrium by one system, the pulmonary arteries.
What three types of blood vessels are there?Over 60,000 miles of arteries, veins, and capillaries make up this extensive network of blood vessels. That is long enough to do two additional world trips. Your body's blood vessels continuously carry blood.
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The best description of the bonds that form polypeptides and the difference between polypeptides and proteins is.
The correct option is A i.e that carboxyl and amino groups join by a covalent bond and that a functioning protein can consist of several polypeptides.
What is polypeptides ?
A polypeptide is a peptide chain that is longer, continuous, and unbranched. Therefore, along with nucleic acids, oligosaccharides, polysaccharides, and others, peptides belong to the large chemical families of biological polymers and oligomers.
A protein is a polypeptide that has more than 50 amino acids, on average. A protein is made up of one or more polypeptides that are structured in a biologically useful manner. Proteins are frequently coupled to other proteins, other macromolecules like DNA or RNA, or complex macromolecular assemblies.
A polypeptide is a chain of many amino acids, whereas a peptide is two or more amino acids bound together by peptide bonds. One or more polypeptides can be found in proteins. Proteins are therefore extensive strands of amino acids joined together by peptide bonds.
Question:
The best description of the bonds that form polypeptides and the difference between polypeptides and proteins is
A) that carboxyl and amino groups join by a covalent bond and that a functioning protein can consist of several polypeptides.
B) the functional group of one amino acid joins with the carboxyl end of another via covalent bonds; proteins and polypeptides are the same things.
C) amino acids are joined via their hydroxyl groups with covalent bonds and many proteins make up a polypeptide.
D) polypeptides form via hydrolysis, forming hydrogen bonds between amino acids; proteins have a functional group whereas polypeptides do not.
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The probability that a person with a positive screening test actually has the disease screened for is called:________
The probability that a person with a positive screening test actually has the disease screened for is called: Positive predictive value.
A screening test is a medical test or treatment carried out on members (subjects) of a designated asymptomatic population or population subgroup to determine the likelihood that their members will have a specific condition. It is also referred to as medical surveillance.
When a person does not exhibit any symptoms of a condition, a screening test is performed to look for probable health issues or diseases. The objective is early identification, lifestyle modifications, or surveillance to lower the risk of disease or to identify it early enough to receive the best possible care. Screening tests are used to identify a subset of the population who should undergo additional testing to ascertain the existence or absence of disease, even if they are not thought of as diagnostic.
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Which statement is a hypothesis that would best address the
question, "Are fewer monarchs migrating to Mexico because
many are dying as caterpillars from starvation?"
O Monarch butterflies are likely migrating to different
regions instead of Mexico.
O If monarch caterpillars are dying from starvation, then
reducing predators will help the population recover.
O If fewer monarchs are arriving in Mexico, then
scientists will find larger populations elsewhere.
O If monarch caterpillars are dying from starvation, then planting more milkweed will help the population
recover.
The hypothesis that fewer monarchs migrating to Mexico because many are dying as caterpillars from starvation is best suited by the statement that monarch caterpillars are dying from starvation, then planting more milkweed will help the population recover.
The monarch butterfly or simply monarch is a milkweed butterfly in the family Nymphalidae. Monarch butterflies migrate over extraordinary distances. Monarch butterflies spend the winter in Mexico and along the California coast in North America. A monarch butterfly has a 2,700-mile range (4,345 km).
Pesticides, such as the poisonous neonicotinoids and herbicides that are wiping off the milkweed plants necessary for their survival, as well as urbanization and climate change are all threats to monarch butterflies.
Hence, by planting more milkweed plants their food resources would be replenished nd hence the larva can feed up properly and this will help in increase of their population.
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