Answer: The exclusion of microbes, such as bacteria and spores.
Explanation:
The swan-neck flask broth was able to remain sterile because the "dips" of the flask's neck acted as a reservoir to contain microbes that managed to get in through the open mouth.
The release of myoglobin into the blood, caused by an electrical burn, can result in failure of?
The release of myoglobin into the blood, caused by an electrical burn, can result in failure of the kidneys.
How does myoglobin result in kidney failure?Myoglobin protein is present in the striated muscles including skeletal and heart muscles. Unbound myoglobin when released into the blood can lead to renal (kidney) failure.Myoglobin is a heme- containing protein that binds to oxygen and supplies oxygen to the muscle cells (myocytes) for energy.When in blood, myoglobin can damage kidneys by resulting in intrarenal vasoconstriction, injury or obstruction to renal tube.Levels of myoglobin can increase due to heart attack, muscle injury and damage. This in turn leads to kidney failure.Myoglobin can result in increase in potassium levels in blood which disturbs the rhythm of heart.Learn more about myoglobin here:
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DNA is too important to leave the nucleus, so it
sends a messenger outside the nucleus with the
instructions to create proteins.
Who does DNA send as a messenger?
A. mRNA
B. nucleolus
C. ribosomes
D. nuclear envelope
Answer:
A.) mRNA
Explanation:
A.) is correct. mRNA is a single strand of RNA that is equipped with modifications that allow it to safety travel outside the nucleus to the ribosomes.
B.) is incorrect. The nucleolus is an organelle inside of the nucleus responsible for housing ribosome biogenesis process.
C.) is incorrect. The ribosomes are structures outside of the nucleus that receive the mRNA and translate its code into amino acids. In turn, this creates new proteins.
D.) is incorrect. The nuclear envelope is the lipid bilayer membrane that separates the nuclear/genetic material from the cytoplasm.
How many different genes are coordinately regulated by the gal4 transcriptional activator?.
Answer:
Four
(For the extra words limit)
All sources of pollution come from human activities. please select the best answer from the choices provided t f
False.
All sources of pollution do not come from human activities.
What are the causes of pollution?There are some natural causes of pollution. When dangerous pollutants enter the air as gases, liquids, or solids, air pollution is formed. Although there are some natural processes that can produce air pollution, such as sulfur and chlorine gases from volcanic activity, smoke and ash from wildfires, dust storms, and biological degradation, manmade sources account for the majority of pollution in the atmosphere.
Burning fossil fuels for transportation, energy, and industry produces the majority of air pollution that is caused by humans. Carbon dioxide, nitrogen oxides, sulfur dioxide, volatile organic compounds (VOCs), and particulates are typical pollutants released by fossil fuel-burning engines. In addition to particles, carbon monoxide and carbon dioxide are produced by stoves, incinerators, and open burning.
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Answer:
False
Explanation:
Due often to excess sweating, diarrhea, or vomiting, ____________ causes the cell membrane to be hyperpolarized due to increased concentration gradients
Due often to excess sweating, diarrhea, or vomiting, hypokalemia causes the cell membrane to be hyperpolarized due to increased concentration gradients.
What is hypokalemia?The cell membrane is a biological membrane that shields the cell from its surroundings and keeps the interior of all cells isolated from the outside world.A cell membrane, often referred to as a plasma membrane, is present in every cell and serves as a barrier between the interior of the cell and the outside world.A semipermeable lipid bilayer makes up the cell membrane. The cell membrane controls the flow of substances into and out of the cell.Cell membrane refers to the cell's outermost body. Both plants and animals have it. This membrane is alive, fragile, and thin. A very small number of molecules can pass through the cell membrane, which is a semi-permeable membrane.The cytoplasm, which is the material positioned between the membrane and the nucleus of a cell, is enclosed by a thin layer known as the cell membrane. It lets good things get through while preventing bad ones. The fundamental structural component of all living things is the cell.
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What type of microorganism can live and multiply only inside an appropriate host cell?
Answer: Viruses
Explanation:
Viruses are tiny infectious agents that rely on living cells to multiply. They may use an animal, plant, or bacteria host to survive and reproduce.
A client states that ""she thinks"" her water has broken. which best provides confirmation of the rupture of membranes?
During pregnancy, your infant is surrounded and cushioned through a fluid-crammed membranous sac known as the amniotic sac. Typically, at the start of or at some point of exertions your membranes will rupture — additionally referred to as your water breaking.
If your water breaks earlier than exertions start, it's known as prelabor rupture of membranes (PROM). Previously it became referred to as untimely rupture of membranes. When your water breaks, you may feel damp in your perineum, have sporadic or continuous little leaks of watery fluid from your perineum, or experience a more pronounced flow of clear or pale yellow fluid.
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Phosphofructokinase is regulated by a number of factors, including high levels of atp. why is this enzyme regulated by atp levels?
Answer:
If ATP levels are high, it is important to directly inhibit the reaction that commits the substrate to glycolysis to allow the substrate to be available for other reactions, since the cell has ample energy.
The diagram below shows an ornithiscian dinosaur, an ancient bird called archaeopteryx, and the modern day bird.
Based on the diagram, which of these statements is most likely correct?
A) Modern day birds have evolved from dinosaurs.
B) Archaeopteryx has evolved from modern day birds.
C) Ornithiscian dinosaurs had evolved from modern day birds.
D) Ornithiscian dinosaurs had evolved from the archaeopteryx.
Answer: option A is the correct answer
Explanation:
Answer:
Option A is the correct answer
Explanation:
Look at the diagram
___________ is a process that stores carbon, and __________ is a process that releases carbon.
It is kept in what are referred to as reservoirs, and it is transferred between these reservoirs through a number of activities, such as photosynthesis, the burning of fossil fuels, and simply exhaling air. The carbon cycle is the transfer of carbon from one reservoir to another.
What is Carbon cycle ?Nature recycles carbon atoms through the carbon cycle. All life on Earth is built upon carbon. The carbon cycle is the ongoing process through which carbon atoms move back and forth between the atmosphere and the Earth.
The carbon content of this closed ecosystem, which includes our planet and its atmosphere, does not vary. The location of the carbon, whether it is on Earth or in the atmosphere, is continually changing.When animals perish, volcanoes erupt, fires burn, fossil fuels are consumed, among other processes, carbon is released back into the atmosphere.Learn more about Carbon cycle here:
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Was the efficiency of selection different for selection against the recessive genotype versus selection against the recessive allele? if so, why was this?
Dominant alleles selection is relatively efficient because these are by definition expressed in phenotype. Selection against recessive alleles is less efficient efficient , because these alleles are sheltered in hetero zygotes.
It is impossible to totally eliminate recessive alleles from a population , because the dominant phenotype is selected for , both AA and Aa individuals have that phenotype. Selection against the recessive gene is more significant in changing gene frequency than selection against a dominant gene.
According to hypothesis , section is more efficient in haploids than in diploids , because recessive mutation are directly exposed to selection in haploids , their phenotype effect can be masked in hetero-zygote diploids through dominate alleles.
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What is the end result of each of these three major steps during cellular respiration?
The end result of each of these three major steps during cellular respiration are here:
Glycolysis - 2 molecules of pyruvic acid and 2 ATP.
Kreb's cycle - 6NADH, [tex]FADH_{2}[/tex], and 2 ATP and [tex]4CO_{2}[/tex].
Oxidative phospholyration - ATP and water.
What is Glycolysis?In the process of glycolysis, the six-carbon sugar molecule glucose is split into two molecules with three carbons (pyruvic acid). Two molecules of ATP are produced when the energy from the broken bonds is caught.What is Kreb's cycle?The three-carbon molecules produced by glycolysis are converted into carbon dioxide molecules by the Krebs cycle. ATP and NADH are produced as an electron donor via the Krebs cycle as well as glycolysis.What is oxidative phosphorylation?Water is created by combining oxygen with the hydrogen atoms of NADH in the electron transport chain. Energy is constantly being taken in during electron transit to create ATP. The procedure is occasionally referred to as oxidative phosphorylation since it needs oxygen.Learn more about cellular respiration here:
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What condition may be the cause of elevated blood glucose levels, depressed immune system, and redistribution of fats from limbs to the face, neck, and abdomen?
The condition that causes elevated blood glucose levels, depressed immune system, and redistribution of fats from limbs to the face, neck, and abdomen is diabetes.
What is the Diabetes?The diabetes condition leads to a great rise in the sugar level of an individual. In most cases the disease is popularly referred to as hyperglycemia. As such, the individual will have a lost of sugar moving freely in the blood stream.
Now, one of the things that this condition does is that there is redistribution of fats from limbs to the face, neck, and abdomen.
Hence, the condition that causes elevated blood glucose levels, depressed immune system, and redistribution of fats from limbs to the face, neck, and abdomen is diabetes.
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The __________ states that genes have specific positions on chromosomes and that chromosomes undergo both __________ and __________.
The chromosomal theory of inheritance existed shown by Boveri and Sutton in the earlier 1900s. It exists the fundamental theory of genetics. According to this theory, genes exist as the units of heredity and exist seen in the chromosomes. Chromosomal Theory of Inheritance reached reality long after Mendelian genetics.
The chromosomal theory of genetics notes that genes contain exact positions on chromosomes and that chromosomes experience both desegregation and independent assortment.
What is a chromosomal theory?The Chromosomal Theory of inheritance, proposed by Sutton and Boveri, notes that chromosomes exist as the vehicles of genetic heredity. Neither Mendelian genetics nor gene linkage exists entirely correct; rather, chromosome behavior concerns segregation, independent assortment, and sometimes, linkage.
The chromosomal theory of genetics notes that genes contain exact positions on chromosomes and that chromosomes experience both desegregation and independent assortment.
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By what mechanism does pi-3 phosphate promote activation of pkb (protein kinase b)?
[tex]PI3K,[/tex] the mechanism does [tex]pi-3[/tex] phosphate promote activation of pkb .
Normally, the regulatory subunit linked to the active receptor directly stimulates [tex]PI3K[/tex]or is indirectly stimulated by adaptor molecules such as the insulin receptor substrate (IRS) proteins. A RAS protein that binds to GTP can also activate [tex]PI3K[/tex].
A receptor tyrosine kinase (RTK) on the plasma membrane is triggered when an external ligand binds to it, producing receptor dimerization and cross-phosphorylation of tyrosine residues in the intracellular domains. Cell metabolism, growth, proliferation, and survival are all influenced by protein kinase B, also known as Akt. Phosphoinositide-3-kinase is a key player in a multi-step process that regulates its activation.
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What is a possible outcome to the urea cycle if the cell is unable to produce enough aspartate?
35,000 is a possible outcome to the urea cycle if the cell is unable to produce enough aspartate.
What is urea cycle?Urea cycle anomalies are a rare illness that affect about one in 35,000 Americans. The cycle's enzymes could be genetically flawed, which is frequently discovered a few days after delivery.The newborn typically experiences numerous episodes of nausea and sleepiness. The most frequently made wrong diagnosis is neonatal sepsis. Urea cycle abnormalities can also be identified in adults, and signs and symptoms may include periods of disorientation, lethargy, and symptoms similar to a stroke. In addition to these symptoms, the patient may also develop cirrhosis if the liver's urea cycle begins to malfunction.This may also cause sarcopenia (the loss of muscle mass). Mutations that result in the inadequacy of the various transporters and enzymes involved in the urea cycle cause urea cycle disorders.Learn about urea cycle here
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Sponges are examples of ________.
a. animals that exhibit bilateral symmetry
b. photoautotrophs suspension feeders
c. animals that lack a true body cavity
In regards to the above, Sponges are examples of animals that lack a true body cavity.
What are Sponges?Sponges are known to be larvae that are said to be motile and they tend to move through the motion of cilia.
Sponges are known to have no true tissues and are called filter feeders,
The animal known to be sponges are known to be one whose body is said to be the simplest sponges and they often the shape of a cylinder.
Therefore, In regards to the above, Sponges are known to be good yo be animals that do not have a true body cavity.
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Answer:Suspension Feeders
Explanation:
suspension feeders
The carrier protein that transports absorbed iron through the blood is?
Answer:
Greater than 95% of iron in plasma is bound to its circulating transport protein transferrin, which delivers most of its iron to erythrocyte precursors—i.e. erythroid progenitor cells of the bone marrow that differentiate into mature RBCs
Explanation:
hope it will help you
A man spends his lifetime perfecting his painting skills. He has his daughter paint as well. he expects his grandson to be a world-famous painter. Whose theory is this man using?
Lamarck theory used by the man. According to this theory - Evolution is based on the principles that physical changes like greater development of organs or part through increased use could be transmitted to their offspring.
Theory is based on used and disused which is states that when certain organs become specially developed as a result of some environmental need, then that state of development is hereditary and passed from one generation to the other.
The aim of theory is to be boiled down to two broad claims such as - new species evolved from the previous species and acquired traits are inherited by offspring.
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Mueller et al. created a strain of mice that lacked the receptor that normally responds to a bitter substance called cyx. The mice that did not have this receptor?
Mueller et al. created a strain of mice that lacked the receptor that normally responds to a bitter substance called cyx. the mice without this receptor did not avoid cyx.
What is cyx receptor?
cyclohexamide(cyx) is a toxic antibiotic with a unique chemical structure genrated by the actinomycete, streptomyces griseus,has emerged as a primary focus of studies on mammalian bitter taste.Rats and mice avoid it at concentrations well below the thresholds for most bitter stimuli and T2R G-protein coupled receptors specific for cyx with appropriate sensitivity identified for those species.Like mouse and rat,golden hamsters,Mesocricetus auratus, also detected and rejected micromolar levels of cyx.
the gene for the high affinity cyx receptors is a member of a cluster of 5 orthologous T2R genes that are likely rodent specific ;thus "cyx clade " is found in the mouse,rat and probably hamster, but not in the human or rabbit genome.
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How would shoot and root growth be affected by a mutation that caused plants to lose the ability to polymerize glucose into starch granules?
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What is it about a person that could cause ordinarily beneficial traits to become so self-defeating?.
You may have feelings of inadequacy when you can't have—or give your children—the kind of life that others seem to have. All of these situations and challenges can lead to stress, which in turn lead to the development of Self Defeating Behaviors (SBD).
What is beneficial traits?Beneficial traits are extremely varied and may contain anything from protective coloration to the ability to operate a new food source, to a change in size or constitution that might be useful in a certain environment.Over time, these favorable traits become more common in the residents. Through this process of natural preference, favorable characteristics are transmitted through generations. Natural preference can lead to speciation, where one species gives rise to a new and distinctly different species.The artificial section is the identification by humans of seductive traits in factories and animals, and the steps taken to enhance and memorialize those traits in future years.To learn more about beneficial traits, refer to:
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The rationale for increasing interest in delivering supply chain solutions is?
The rationale for increasing interest in delivering supply chain solutions is that firms are using solutions as the basis of competition which involves a combination of products and services.
Firms are increasingly resorting to responsible supply chain management as they align their economic success with socially responsible initiatives in their value chain. This contribution aims to suggest that there are opportunities for global corporations who are keen on integrating responsible practices into their business operations. It is in their interest to report about their responsible supply chain management, social performance and sustainable innovations to their stakeholders.
The corporations’ differentiated strategies as well as their proactive engagement in responsible supply chain management can lead them to achieve a competitive advantage in the long term. The low-cost producers may be neglecting the marketplace stakeholders, including suppliers, distributors among others. Moreover, the smaller businesses’ could not be in a position to follow responsible procurement practices, as they may lack the scarce resources to do so.
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What is the relationship between light intensity and ATP production?
Answer:
The more light there is, the more chlorophyll absorbs it, which means there are more electrons being transported from the chlorophyll, and while they are being transported, they create not only more ATP but NADPH2
Explanation:
the mammalian tail and
the human coccyx (tail bone)
the leaves of pitcher plants
and cacti
the flippers of penguins
and dolphins
the bills of ducks
and platypuses
Homologous
the shells of turtles
and crabs
Analogous
The mammalian tail and the human coccyx, the leaves of pitcher plants and cacti, are homologous organs while, the flippers of penguins and dolphins, as well as the shells of turtles and crabs are analogous structures.
What are homologous organs?Homologous organs are those that are similar in structure but operate differently. They resulted from divergent evolution.
Divergent evolution occurs when species are closely connected to the same ancestors but develop similar structures that perform different tasks in different environments.
Analogous Organs are organs from various creatures that, despite their appearance, perform the same function.
In the given case, the mammalian tail and coccyx, as well as the leaves of pitcher plants and cacti, are homologous organs, whereas penguin and dolphin flippers, as well as turtle and crab shells, are analogous structures.
Thus, these are the different instances of homologous and analogous organs.
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Why are cells so small? In your answer, use the terms volume, distance, diffusion, surface area, plasma membrane.
Answer:
Cells are so little, so they can maximize their ratio of surface area to volume.
Explanation:
Smaller cells have a higher ratio which allows more molecules and ions to move across the cell membrane per unit of cytoplasmic volume. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.
The hindbrain consists of the ____. a. thalamus and hypothalamus b. tectum, tegmentum, and reticular formation c. medulla, pons, and cerebellum d. spinal cord and cranial nerves
The hindbrain consists of the medulla, the pons, and the cerebellum.
The hindbrainThe hindbrain is the portion of the brain that is otherwise known as the rhombencephalon. It is the part of the brain that is located towards the lower back.
The hindbrain consists of 3 main parts:
The medulla oblongataThe ponsThe cerebellumEach component has specific functions they perform. The medulla oblongata is located at the extreme end where the brain connects with the spinal cord. It controls activities such as heartbeat, blood pressure, and respiration.
The pons of the hindbrain work hand in hand with the medullar oblongata for effective breathing. In addition, it is the part of the brain that controls the circadian rhythm of the body.
The cerebellum helps the body to maintain postural balance and adjustments when necessary.
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Which testicular cells help deliver sperm to the epididymis by contracting rhythmically?
Myoid cells help deliver sperm to the epididymis by contracting rhythmically.
All mammalian species have peritubular myoid cells that surround the seminiferous tubules in the testis, but each species has a different arrangement of these cells inside the peritubular interstitial tissue. They are actin-containing contractile cells that play a major role in spermatozoa transport via tubules. By helping to lay down the basement membrane, they give the tubules structural rigidity.
The function of Sertoli cells has also been found to be impacted by this, and PTM cells and Sertoli cells can communicate with one another via secreting growth factors and elements of the extracellular matrix. PTM cells are essential for establishing proper spermatogenesis, according to studies.Overall, PTM cells play a part in regulating spermatogenesis through cellular contact and preserving the tubules' structural integrity.
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When exposure to ionizing radiation causes proliferation of the white blood cells, the radiation-induced disease that occurs is:_______.
When exposure to ionizing radiation causes proliferation of the white blood cells, the radiation-induced disease that occurs is Anemia.
The radiation could pass through the cell without damaging the DNA. The radiation could damage the cell's DNA, but the DNA repairs itself . X-ray photons collide with important cell chemicals and break them apart by ionization, causing critical damage to large molecules. Based on the assumption that radiation can cause chemical damage to the cell by ionizing the water within it .Radiation works by damaging the genes (DNA) in cells. Genes control how cells grow and divide. When radiation damages the genes of cancer cells, they can't grow and divide any more. Over time, the cells die.
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Select the correct answer. how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? a. the value of q is negative b. the value of q is positive c. the value of q remains constant d. the value of q decreases e. the value of q equals zero
The correct option is, (B) the value of q is positive.
What is photosynthesis?It is a chemical process or reaction that occurs in green plants or living creatures. During this process, carbon dioxide combines with water in the presence of sunshine to produce glucose and oxygen.As we all know, photosynthesis cannot occur in the absence of sunshine. As a result, the photosynthesis reaction is an endothermic reaction in which energy or heat is supplied to the system. This implies that the value of 'q' will be positive. If the system produces heat, the value of 'q' is negative.To learn more about photosynthesis from the given link
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