The structure of water molecule result in the hydrogen bonding in that:
The structure of a water molecule results in hydrogen bonding due to the distribution of electrons in the molecule. Water molecules are made up of two hydrogen atoms bonded to a single oxygen atom, forming the chemical formula H2O.What is the hydrogen bonding about?The oxygen atom has a higher electronegativity than the hydrogen atoms, which means it is more effective at attracting and holding onto electrons. As a result, the oxygen atom has a partial negative charge and the hydrogen atoms have partial positive charges.
Therefore, a partial positive charges on the hydrogen atoms are attracted to the partial negative charge on the oxygen atom of another water molecule, forming a hydrogen bond. This is a weak chemical bond, but it is significant enough to give water many of its unique properties, such as its high surface tension and ability to act as a solvent.
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How did Darwin prove his theory of evolution?
The patterns he had observed during his travels may be explained by Darwin's theory of evolution by natural selection.
In the case of the Galápagos finch species, it made sense that they would resemble one another as well as mainland finches, who most likely had a common ancestor. The best proof that organisms evolved from a common ancestor is similar DNA sequences. The existence of fossils proves evolution. These samples demonstrated how closely related ancient species were to those that existed during Darwin's time. A progression of evolution can be seen in fossils, which also offer compelling proof that species from the past were distinct from those present now.
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Which of the following is a true statement?
O Balance can be achieved by creating equal visual weight throughout a design, even if the design is not symmetrical
O Balance is achieved only through symmetrical designs.
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Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (stapling a stack of papers). Group A is given the special juice to drink while they work. Group
B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks and Group B made 2,113 stacks.
What is the control group in this experiment?
a. Group A
b. Group B
What is the independent variable in this experiment?
a. Special juice drink consumption
b. Productivity of workers
c. Number of employees
What is the dependent variable in this experiment?
a. Special juice drink consumption
b. Productivity of workers
c. Number of Employees
What is the experimental group in this experiment?
a. Group A
b. Group B
Is Smithers’ hypothesis supported or refuted?
a. Supported
b. Refuted
Answer:
1. group A
2. Productivity of workers
3. Special juice drink consumption
4. Group B
5. Refuted
Explanation: sorry if am not correct
A country has the following population statistics: crude birth rate = 12% crude death rate = 8% immigration = 2.8% emigration = 0.5% What is the growth rate of the population in this country?
A. 6.3
B. -0.7
C. 1.5
D. 1.6
Answer:A. 6.3 ong
Explanation:
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For each of the following, circle the word that does not belong belong with the rest and then in ONE complete sentence, explain why it does not fit.
1. Coal, Oil, Solar, Power, Natural Gas
2. Biodegradable, Recycling, Sustainability, Deforestation
Answer: the words that doesn't belong include:
1.) Power
2.) Deforestation
Explanation:
1.) Coal, Oil, Solar and Natural Gas are considered to be sources of energy while POWER is not considered among the rest this is because it's energy in action and not a source of energy.
Coal, oil and natural gas are known as fossil fuels which are the most common sources of energy in industries and homes. These fossil fuels are destroyed by use, that is, they cannot be recovered. Alternative sources of energy is the solar which is gotten from the sun energy. Although not considered a very efficient energy producer, there are already discovered schemes that would provide us with an inexhaustible supply of energy which would also not cause any pollution problems.
2.) Biodegradable, Recycling and Sustainability are means by which pollution is being avoided in the environment. While DEFORESTATION is a process that can cause pollution of an environment, therefore it doesn't fit into the rest of other words.
Biodegradable materials can be broken down by microorganism. Examples include human and animal excreta. Recycling is the reprocessing of waste materials in order to be re-used. This reduces the amount of waste that are sent to incinerators. While sustainability is the maintenance of the ecosystem to remain diverse and productive over time. This could be seen in the preferred use of renewable energy over non renewable energy. But deforestation is the massive cutting down of trees which can cause soil erosion and climate changes leading to the pollution of the environment.
how does photosynthesis contribute towards maintaining a clean environment and ensuring food security?
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Answer:
Well for one photosynthesis gives out oxygen. This makes all animals able to live. So in that way it helps us and the world around us. Without photosynthesis we also could not eat food. No animals could live and no plants ould live. VERY IMPORTANT!
Explanation:
There is only 1 major predator in this environment, and it
can only eat the small and medium sized fish. So, the
frequency of the large sized fish would go up in
generation 2. This is an example of
selection.
Contrast the photic and aphasic zones and the organisms found in each.
Answer:
the well-lit upper layer of the ocean; algae and other producers can grow only in this surface layer
thousands of genes make up a single _______________, a double helix dna molecule wrapped around proteins.
Thousands of genes make up a single chromosome ,a double helix DNA molecule wrapped around proteins.
Chromosome is a structure found inside the nucleus of a cell . It is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes, of which 22 pairs of chromosomes are called the autosomes and the last pair of chromosomes is called the sex chromosome and are individually called the X and Y chromosome.
In most of the chromosomes, the very long thin DNA fibers are coated with packaging proteins, in eukaryotic cells the most important of these proteins are the histones.
Chromosomes allow the DNA to be accurately copied during these cell divisions.This ensures that our inner mechanisms proceed smoothly and efficiently.
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Which of the following would you expect to have the least effect on hematocrit percentage?
A) prolonged or excessive fever
B) living at higher altitude
C) dehydration
D) injection with erythropoietin (EPO)
Whats the difference between Asexual and sexual reproduction and how are they similar (5-7 sentences)
Answer:
Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent. They both require reproduction. Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique.
Explanation:
If an allogenic blood component is shipped from the donor center with infectious disease testing incomplete, the units must be labeled with:
When an allogenic blood component is shipped from a donor center with incomplete infectious disease testing, it must be labeled appropriately to ensure the safety of the patient.
The label must include a message stating “For Emergency Use Only By (Specific Patient)”, as well as any tests that have been completed, and those tests that are negative.
There is no specific color requirement for the label, so it is important to ensure that the message is clearly visible. It is also important to note that the unit must not be released for transfusion until appropriate infectious disease testing is completed and verified. This is to ensure that the patient is not exposed to any additional risk.
Proper labeling is essential in helping to identify any potential risks associated with the unit, so that the patient receives the safest blood possible.
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Describe 3 alternative energy technologies and identify two ways that hydrogen gas could be used as a fuel in the future
Answer:
hope it helps..
Explanation:
In the future, hydrogen will join electricity as an important energy carrier, since it can be made safely from renewable energy sources and is virtually non-polluting. It will also be used as a fuel for 'zero-emissions' vehicles, to heat homes and offices, to produce electricity, and to fuel aircraft.
Procrastinators will usually ________. a. work on important tasks after valuable time has passed. b. work on tasks that are not priorities c. work on tasks in a haphazard way d. all of the above Please select the best answer from the choices provided A B C D
Answer:
d
Explanation:
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How were scientists able to determine that DNADNA , and not some other molecule, serves as the genetic material in bacteria and bacteriophages
Hershey and Chase demonstrated that DNA is the sole substance transmitted directly from bacteriophages into bacteria when the bacteria are infected by these viruses by utilizing radioactive labels that would integrate selectively into either DNA or protein but not both.
Alfred Hershey and Martha Chase began looking for genetic material in organisms in 1952. Their investigations proved unequivocally that DNA is genetic material. Bacteriophages (viruses that attack bacteria) were key to Hershey and Chase's experiment.
Proteins were assumed to be the molecules that carried genetic information for many decades. Several researchers' efforts resulted in the revelation that DNA is the genetic material. Griffith found the process of change along the road.
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What layer of the heart would be most immediately susceptible to infections caused by bacteria circulating in the blood
The endocardium covers the heart valves and it is these valves that are primarily affected by infective endocarditis. If an infection is left untreated, bacteria can grow and eventually destroy the valve, leading to heart failure.
Three layers of tissue make up the wall of the heart. The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.
The endocardium is the innermost layer of the heart, lining the ventricles and covering protruding structures such as the heart valves, chordae tendineae, and papillary muscles. Endocardial cells are developmentally and biologically similar to the endothelial cells that line blood vessels. The endocardium protects the valves and heart chambers as well.
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Which is an example of a recent development used to address food shortages in urban areas?
Option - B is an example of a recent development used to address food shortages in urban areas.
What leads to food insecurity in cities?The primary causes of food insecurity in urban environments
They may not have social or extended family support, especially if they are recent migrants to the city, so they must hire substitute childcare, which adds to their family's financial burden.
Opening temporary, low-cost fruit and vegetable markets in underserved areas. Studying initiatives like community food hubs or farmers' markets nutrition vouchers that have helped other communities fight food insecurity
By providing wholesome and plentiful alternatives to purchased food, urban agriculture enhances food security, particularly for low-income households.
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The Venn diagram compares aerobic and anaerobic respiration.
which statement could be categorized in the overlapping section of the Venn diagram?
A. uses pyruvic acid
B. has commercial uses
C. regenerates NADH
D. produces 36 ATP
The Venn diagram compares aerobic and anaerobic respiration. Uses of pyruvic acid could be categorized in the overlapping section of the Venn diagram.
In order to produce energy in the form of ATP molecules, aerobic respiration involves the complete breakdown of a glucose molecule in the presence of oxygen (36 molecules of ATP).
Contrarily, anaerobic respiration entails the partial breakdown of a glucose molecule to produce energy in the form of ATP molecules without the presence of oxygen (2 molecules of ATP).
The use of pyruvate is a characteristic shared by both aerobic and anaerobic respiration (pyruvic acid). The glycolytic process, which is the same for both processes, produces pyruvic acid.
While during anaerobic respiration, pyruvic acid is utilised to manufacture alcohol or lactic acid to renew NAD+, during aerobic respiration, pyruvic acid is used to build acetyl coenzyme A that enters the Krebs cycle.
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Answer:pyruvic acid is used
Explanation:i took it
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To What Extent Are Calls for Greater Minority Representation in COVID Vaccine Research Ethically Justified
There are a lot of people out there who have ethical concerns about COVID Vaccines. However, based on opinion polls, it seems that many people also have security concerns. So, it seems that the COVID Vaccine in general is ethical. However, a small number of people who have ethical concerns about the vaccine will still refuse to get it.
Ethical considerations and coverage of COVID-19 payments are quite complicated thought. The public has varying degrees of confidence in the COVID-19 vaccine, possibly due to limited information regarding the type of vaccine, date of availability, and safety profile.
Entering 2021, COVID-19 has been a pandemic for more than a year. So far, most countries in the world have not succeeded in suppressing the spread of the disease. Efforts to make social disclosure have a negative impact on the economy and social welfare. An effective vaccine is the beacon of hope for the world. The COVID-19 vaccine is the first vaccine to be developed in a very short period. The pressure from the world to apply the vaccine is very high.
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Where can the element carbon be found?
A. Carbon is only found in the atmosphere as part of carbon dioxide.
B. Carbon compounds are found in all living organisms.
C. Most carbon is dissolved in the oceans.
Answer:
DEFINITELY B!
Carbon is found in EVERY ORGANIC matter! Hope that helps!
Many lethal genetic disorders such as CF, Huntington’s, sickle cell anemia, Tay Sach’s, etc., persist in the human genome. How have these genes survived so many millennia of evolution (why didn’t they die out)?
They've been under the purview of balancing selection. This type of selection occurs when two alleles – one being the harmful variant and the other being the beneficial variant – both confer some sort of benefit in the presence of each other. This can work in two ways. Sometimes the balance of deadly and beneficial alleles can create a balance in the population, allowing for genes to persist over time. In other cases, the lethal genes can be beneficial if there is an environmental change and the deadly gene can offer protection from the new environment. Both of these scenarios create a balance of selection, allowing for the persistence of the gene over time. In some cases, the lethal genes are essential for the maintenance of certain gene complexes and, if lost, could result in decreased fitness. This type of selection is known as evolutionary pressure and it can also contribute to the longevity of certain genes. A third possibility is that some of the genes simply survive due to random genetic drift.
Why do leaves change colour explain?
Carotenoids are pigments that give leaves their yellow and orange colors. These pigments are always present in leaves, but become more visible as the chlorophyll breaks down in the fall.
Leaves change B due to changes in the pigments that are present in the leaf. Chlorophyll is the pigment primarily responsible for the green color of leaves and is present in all leaves. Chlorophyll is important for the process of photosynthesis, which allows plants to convert light energy into chemical energy. However, as the days get shorter and temperatures cool in the fall, the level of chlorophyll in a leaf decreases and the chlorophyll breaks down. This process causes the green color of leaves to fade, revealing other pigments that have been present in the leaf all along.
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In a bird egg the developing embryo is inside the amnion, which contains fluid. The embryo gets nourishment from the yolk. The chorion lines the inside of the shell and helps protect the embryo. What structures in a human provide the same functions as these structures in the bird egg?
Answer: Placenta
Explanation:
Placenta is the outer protective envelope around the developing embryo. It is attached with the lining of the uterus. It has a permeable membrane which allows the entry of oxygen and nutrients to be supplied to the embryo. It helps in getting rid of harmful substances like carbon dioxide and waste from the developing fetus body.
describe in your own words the cycle of an ecosystem
Answer:
An ecosystem is where there are many organisms such as plants and animals also including weather and landscape. Ecosystems have biotic and abiotic things . Ecosystems can be very large or very small.
Explanation:
What are the two bodies of bicameral legislature?
A two-chamber legislature. a legislative bodies with two chambers or components. the bicameral legislature made up of the House of Congress and the Senate.
Two chambers share legislative authority in a bicameral legislature or legislature. Around 80 body nations in the planet have bicameral legislatures. Generally speaking, bicameralism is more prevalent bodies in federal, big, presidential governments, whereas unicameralism is more prevalent in unitary, small, legislative states. In the United States, bicameral legislatures make up the majority of state and bicameral legislatures. That is, there are two distinct bodies that make up each legislative. These two organizations are separate, autonomous entities made up of delegates who frequently hold varying terms and convene bodies in different chambers.
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an antonym for immerse?
Answer:
An antonym of immerse is dry.
which are renewable and which are non renewable
Answer:
Renewable: Water, Trees, Wind, Ice Cubes, Sunlight, Salt Water, Lumber, Paper
Non-renewable: Coal, Oil, Plastics, Bauxite (Aluminum), Natural Gas, Gold Jewelry, Iron, Soda Can
How do cancer cells differ from other cells
Answer:
In contrast to normal cells, cancer cells often exhibit much more variability in cell size—some are larger than normal and some are smaller than normal. In addition, cancer cells often have an abnormal shape, both of the cell, and of the nucleus (the “brain” of the cell.)
Answer:
Cancer cells grow in the absence of signals telling them to grow. Normal cells only grow when they receive such signals. Cancer cells divide in an uncontrolled manner, while normal cells divide in a controlled manner. Cancer cells do not show contact inhibition, while normal cells do. The lifespan of cancer cells is indefinite, while normal cells have definite lifespans.
Explanation: