If anyone can answer all of these, they deserve big thanx!
Last questions of the night, I also need these before 12am and it’s almost 12!

Answer:

From the small intestine, the blood gathers food nutrients and delivers them to every cell.

Blood. Blood consists of: ...

The heart. The heart pumps blood around the body. ...

The right side of the heart. ...

The left side of the heart. ...

Blood vessels. ...

Arteries. ...

Capillaries. ...

Veins.

Explanation:

The statement "Blood pressure plays a major role in returning venous blood to the heart" is false because venous blood flow is primarily driven by mechanisms other than blood pressure.

Unlike arterial blood flow, which is propelled by the pumping action of the heart, venous blood flow relies on a combination of factors such as skeletal muscle contractions, one-way valves within veins, and respiratory movements.

The contraction of skeletal muscles, particularly in the legs, acts as a pump, squeezing the veins and propelling blood towards the heart. The presence of one-way valves within veins prevents backward flow, ensuring blood moves in the desired direction. Additionally, the pressure changes that occur during breathing, specifically inhalation, create a pressure gradient that assists in venous return, the statement is false.

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Answer:

nucleotide; nucleic acid

Explanation:

nucleic acid is the polymer, and nucleotide is the monomer as its the buliding block of nucleic acid.

Answer:

True

Explanation:

"Cellular Respiration" is the method in which organisms take molecules broken down from food and free the chemical bonds collected in the chemical bonds of those molecules.

It is crucial to identify that food is not a direct source of energy.

The energy that is released from chemical bonds throughout cellular respiration is collected in molecules of ATP.

ATP provides energy for most work done by the cell.

The metabolic imbalance theory most commonly attempts to account for alcoholism (option a).

This theory suggests that alcoholism is related to a metabolic dysfunction or imbalance within the body, specifically involving the way alcohol is metabolized.

Alcohol metabolism primarily occurs in the liver, where it is broken down by enzymes. In individuals with alcoholism, it is believed that there may be genetic or physiological factors that lead to an altered or inefficient alcohol metabolism process.

This metabolic imbalance can result in an abnormal response to alcohol, such as increased tolerance or heightened sensitivity.

Furthermore, the metabolic imbalance theory also encompasses the impact of alcohol on various physiological processes and systems in the body. Chronic alcohol abuse can disrupt metabolism, nutrient absorption, hormone regulation, and liver function, leading to further imbalances and complications.

While the metabolic imbalance theory has been primarily associated with alcoholism, it is important to note that drug abuse involving substances like marijuana or cocaine may involve different mechanisms and theories to explain their effects and addictive properties.

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Answer:

option A is correct that is 12

Explanation:

meiosis occur in two phases in first phase DNA replication occur and amount of DNA become doubled without any change in the chromosome number and two daughter cell (each 2 n)are formed.

now in stage 2 each daughter cell undergoes mitosis with the formation of two cells with half chromosomes(n)

now 2n=24

n=24/2 =12

after meiosis stage 1...........two daughter cell each with  24 chromosomes

stage 2 .............each daughter cell form two grand daughter cell each with 12 chromosomes

net result.......4 daughter cell each with 12  chromosome(assuming cell as a diploid cell)

If a cell has 24 chromosomes before cell division then the daughter cell resulting from the mitotic division will have 24 chromosomes while the daughter cell resulting from the meiotic division will contain 12 chromosomes each.

The answer is option A.

There are sorts of cell departments: mitosis and meiosis. most of the time whilst humans discuss “cellular division,” they suggest mitosis, the procedure of making new frame cells. Meiosis is the sort of cell division that creates egg and sperm cells. Mitosis is an essential technique for lifestyles.

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The oxidation of 1 molecule of NADH by nitrate (NO3-) would yield approximately 4.3 ATP molecules per NADH molecule due to its reduction potential at 0.54 V.

The standard reduction potential of elemental sulfur (S) is at 0.04 V and therefore in the oxidation of 1 NADH molecule, it would synthesize around 1.2 ATP molecules per NADH molecule. The oxidation of NADH by ½ O2 molecule yields approximately 2.5 ATP molecules per NADH molecule due to the reduction potential of oxygen at 0.82 V.

The amount of ATP molecules generated from each of the terminal electron acceptors in NADH oxidation show the significant influence that the reduction potentials of the different terminal electron acceptors have on the amount of ATP the bacteria can synthesize.

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A microbiologist discovers a new species of anaerobic bacteria that has the ability to oxidize ammonium. The microbe plays a role in the nitrogen biogeochemical cycle

Biogeochemical cycles involve the transformation of nutrients between biotic and abiotic components of an ecosystem. The cycling of nitrogen (N) between living organisms and the environment is known as the nitrogen cycle.

Nitrogen exists in various forms in the environment, including atmospheric N2 gas, ammonium, nitrate, and nitrite. Nitrogen gas (N2) accounts for 78 percent of Earth's atmosphere but is largely unavailable to most organisms because the triple bond between its two atoms is incredibly difficult to break.

Only a few species of bacteria and archaea can break the triple bond, allowing them to assimilate N into biological compounds such as amino acids, nucleic acids, and proteins. These bacteria convert N2 gas into ammonia (NH3) and ammonium ions (NH4+), which can be assimilated by plants and certain bacteria.

The bacteria that have the ability to oxidize ammonium play a vital role in the nitrogen cycle by converting ammonia to nitrite (NO2-) or nitrate (NO3-) through nitrification. Nitrification is an aerobic process, which means it requires oxygen. Anaerobic ammonium oxidation is another pathway for nitrogen cycling, in which anaerobic bacteria oxidize ammonium to nitrite in the absence of oxygen. This process is referred to as anammox.

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Inadequate sunlight prevents coral reefs from surviving below the euphotic zone.

The majority of coral reefs are found nearby in shallow water. Due of this, they are particularly susceptible to the negative consequences of human activity, both directly via the exploitation of reef resources and indirectly through the effects of nearby human activities on land and in the coastal zone. The social, cultural, and economic fabric of local coastal communities is intricately intertwined with many of the human activities that harm coral reefs.

Numerous local risks to coral reefs exist, such as:

Physical harm or devastation caused by recreational overuse, coastal development, dredging, quarrying, harmful fishing methods and equipment, boat anchors and groundings, etc (touching or removing corals).

Land-based pollution that makes its way into coastal waterways There are several pollution kinds and sources from land-based activities.

1.sedimentation

2. Nutrients

3. pathogen

4. Toxic substances

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Answer:

Explanation:

Mutations are effectively errors in the DNA copying or transcription processes. They can occur naturally or be caused by mutagens, either chemical such as benzene or environmental such as ultraviolet light. These mutations concern the basses on DNA and can be as small as one base changing to another or as complex and detrimental as the insertion of a new base along the strand. Such mutations can drastically change the proteins created by an organism and affect entire chromosomes or genes. Some mutations that affect gametes can be passed down from parent to offspring and are called germline mutations. Such mutations can create entirely new alleles and increase a populations genetic variation. One such genetic mutation that occurs in humans in cancer. Cancers are errors in a cells DNA caused by mutations that allow the cell to grow and multiply uncontrollably copying the mutated DNA along the way. One specific type of cancer is breast cancer. Breast cancer has two different types of mutations. There are the BRCA 1 and 2 varieties. According to the charts, the BRCA 1 mutation appears to be more deadly. If a woman carries the BRCA 1 mutation, she has, once again according to the chart, an 18 percent chance of death. All of the women in the table above had a family history of cancer. This would point to the fact that cancer can be passed down as well as contracted from a certain type of mutagen known as a carcinogen. The table also references preventative surgeries in a number of women carrying both the BRCA 1 and 2 mutations as well as some without either. Unfortunately, given the data shown, it is impossible to determine the effectiveness of such procedures. To be able to judge this, data about the survival rates of women who underwent the procedures versus those who did not would be required. The bar graph above the chart also mentions ages. It shows that the numbers of cases of breast cancer increase rather quickly until ages 50-59 and then steadily and slowly decline. Most breast cancer cases occur in women 50-59 years old. This tells us that the mutation takes quite a few years to manifest as it is a genetic mutation and is furthered by the sufferers decreased ability to fight off carcinogens with age. If cancer can be removed by surgeries or by the death of the afflicted, why does it still exist in our population? The answer is simple. Cancer can be passed on hereditarily but that is not the only way for it to be contracted. Carcinogens that exist as chemicals or as environmental factors are present everywhere and can mutate one’s DNA and therefore genes. This can then be passed on to offspring as well.

Genetic variations occur as a result of recombination and mutation. Variations enable organisms to adapt to environmental conditions.

Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination).

The genetic diversity has three different sources: mutation, recombination and immigration of genes. Mutation is the driving force of genetic variation and evolution.

Genetic diversity is important because it gives species a better chance of survival. However, genetic diversity can be lost when populations get smaller and isolated, which decreases a species' ability to adapt and survive.

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Answer:

A. Genetic Biodiversity

Explanation:

All in all, many products that make up food, medicine, and supplies for humans are enhanced by the components of biodiversity.  

Similarly, a lot of components that make up our medicines usually come from environments that have extravagant amounts of biodiversity.

Case in point, the country of Madagascar is where most of the formulas of our medicines come from, and it has some of the most vibrant & biodiverse tropical forests in the world.

Genetic Diversity provides a fundamental connection for critically expanding the molecular diversity required for future effective drug discovery efforts. Therefore, option (A) is correct.


Why is diversity important to pharmaceutical industry?

Natural products account for around 35% of all medications. Biodiversity is critical to preserving human and animal health. A vast range of plants, animals, and fungus are utilized as medicines, necessary vitamins, pain relievers, and so on. Ancient tribes all across the world recognized and employed natural ingredients as remedies.

Greater awareness of the earth's biodiversity leads to significant medicinal and pharmaceutical breakthroughs. Biodiversity loss may restrict the identification of viable cures for numerous illnesses and health issues. For eg: Antibiotics, plant drugs, etc.

Thus, option (A) is correct among other options.

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According to the punnet square offspring from these parents have a 50%  chance of inheriting one B allele and one b allele,

The genotypes of a certain cross or breeding experiment are predicted using the Punnett square, a square diagram. It bears Reginald C. Punnett's name, who developed the method in 1905. Biologists use the figure to calculate the likelihood that a child will have a specific genotype.

The term "allele" is used to refer to a gene's alternate form or variants. For each autosomal gene, one allele is inherited from each parent, and we often group the alleles into groups. Usually, we refer to them as normal, wild-type, aberrant, or mutant alleles.

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The population of deer in the wildlife sanctuary can be estimated using the formula:

P(t) = P(0) * (1 + r)^t

where P(t) is the population after t years, P(0) is the initial population, r is the growth rate per year, and t is the number of years.

In this case, the initial population (P(0)) is 40 deer, the growth rate (r) is 60% per year (0.60), and we need to estimate the population after one year (P1) and two years (P2).

To calculate P1:
P(1) = 40 * (1 + 0.60)^1
P(1) = 40 * (1 + 0.60)
P(1) = 40 * 1.60
P(1) = 64

Therefore, the estimated population after one year is 64 deer.

To calculate P2:
P(2) = 40 * (1 + 0.60)^2
P(2) = 40 * (1 + 0.60)^2
P(2) = 40 * 1.60^2
P(2) = 40 * 2.56
P(2) = 102.4

Therefore, the estimated population after two years is 102.4 deer.

It's important to note that these are estimates and assume that there are no constraints on the population growth. In reality, factors like limited resources, predation, and disease can affect the growth rate and population size.

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Answer: D. Kingdom Animal

Explanation: Among other animal characteristics, humans can move on their own, so they are placed in the animal kingdom. Further, humans belong to the animal phylum known as chordates, because we have a backbone. The human animal has hair and milk glands, so we are placed in the class of mammals.

Answer:

D. Kingdom Animalia

Explanation:

Human beings belong to kingdom Animalia. So, option (D) is correct.

Answer:

i know how to do them kinda, i just finished learning them, i cant give u a 100% on it but can u take another picutre but zoomed in so i can see the problems better

Explanation:

If two solutions have the same solute concentration, they are considered isotonic.

If one solution has a higher concentration of solutes with respect to another one, then this solution can be considered hypertonic.

If one solution has a lower concentration of solutes with respect to another solution, then this solution can be considered hypotonic.

The tonicity of the solutions measures the effective osmotic pressure gradient and is relative to the concentration of solutes that do not move freely through the semipermeable membrane. If you consider two solutions separated by a biological membrane, like the cell membrane, the net movement of water between both compartments will be determined by the osmotic pressure, it will diffuse from the compartment with lower tonicity to the compartment with higher tonicity.

In this case, the concentration inside the cell is 5% and the concentration outside the cell is 6%, then the solution found within the cell can be considered hypotonic with respect to the extracellular solution.

Due to the osmotic pressure, the water will diffuse out of the cell. This process will cause the cytoplasm volume to decrease, and the cell will suffer a process called Crenation.

The correct option is E. since the intracellular solution is hypotonic with respect to the extracellular solution.

Answer:

appearance, reproduction, mobility, and functionality

Explanation:

Answer:

B.Proteins

Explanation:

mainly proteins have carbon, hydrogen, oxygen and phosphates in common.

carbohydrates have only Carbon, hydrogen and oxygen

Answer:

is that a line segment

The mutation likely to become fixed is: (2) a very beneficial mutation in an extremely large population.

Mutation is the change in the genetic sequence which results in abnormal functioning of phenotype in an organism. The mutations have heritable property and therefore are passed onto generations. A mutation is said to be fixed when its frequency has reached in 100% of the population.

Beneficial mutations are the type of mutations where instead of disrupting the function or phenotype, it leaves a positive effect upon the organisms. This mutation when passed from on to generations strengthen their survival. For example, antibiotic resistance in bacteria is beneficial to them.

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Answer:

This is easy the answer is H2O

Explanation:

There are 2 hydrogen molecules and one oxygen and that makes up water.

Answer:

Maybe D

Explanation:

Hope this helps! Have a nice day! Owa Owa!

Answer:

White blood cells are a part of your immune system that protects your body from infection. These cells circulate through your bloodstream and tissues to respond to injury or illness by attacking any unknown organisms that enter your body.

Explanation:

White blood cell, also called leukocyte or white corpuscle, a cellular component of the blood that lacks hemoglobin, has a nucleus, is capable of motility, and defends the body against infection and disease by ingesting foreign materials and cellular debris, by destroying infectious agents and cancer cells

Ans

400=x*40

x=400/40=10

ans =   x10

Explanation:

total magnification=eyepiece magnification*objective lens magnification

eye piece=total/objective lens

:)

The superior portion of the nasal septum is formed by the perpendicular plate of the ethmoid bone and the lower portion is the vomer bone

Trauma can cause the nasal septum to deviate from the center line of the nose, resulting in a deviated septum. However, a minor displacement to one side is usual. The septum usually stays in the midline until around the age of seven, when it begins to deviate to the right. A septoplasty is a procedure that straightens the nasal septum.

An ulcer, damage from an inserted item, long-term exposure to welding fumes, or cocaine usage can all result in a perforated nasal septum. There is a surgery that can help patients who have a perforated septum. To seal the open sore, slide a silicone button into the hole.

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Answer:

2. Sex cells

I hope this helps!

Answer:

2. Sex Cells

Explanation:

Sex Cells (sperms and eggs) are reproductive cells that fuse their nuclei together through the process of fertilization to form a zygote that later develops into an off-spring. They are known as sex cells as it's completely dependent on these cells (mostly sperm cells) to determine the sexual configuration or the gender of the produced off-spring.

Although Porifera and Cnidaria differ from one another in a number of ways, they also have several things in common.

Porifera and Cnidaria's structural distinctions should be compared. Cnidarians have tissues, however poriferans lack real tissues. Because of this distinction, cnidarians have a nerve net and muscle cells for motility, whereas poriferans do not.

They have asymmetrical bodies. The body may be round, spherical, shaped like a vase, or shaped like a sac. They are diploblastic creatures because they have two layers: an outer dermal layer and an inner gastral layer. Between these two layers is a gelatinous, noncellular mesoglea.

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Intense, Prolonged periods of stage 3 and 4 sleep: REM sleep deprivation can lead to an increase in deep sleep, also known as stage 3 and 4 sleep, which are usually followed by lighter sleep stages.

A. This can cause longer and more intense periods of deep sleep, and can lead to a feeling of tiredness during the day.

B. Interference with memory tasks: REM sleep deprivation has been linked to impairments in memory formation and recall. Studies have found that REM sleep deprivation impairs the ability to remember information, and can lead to difficulty concentrating and completing tasks.

C. Decreased sleep onset episodes: REM sleep deprivation can lead to a prolonged sleep latency period, which is the amount of time it takes to fall asleep. This can lead to decreased sleep onset episodes and an increased difficulty in getting a good night’s sleep.

D. Sleep apnea and night terrors: REM sleep deprivation can increase the risk of developing sleep apnea and night terrors, which can cause extreme fatigue, irritability, and mood swings.

E. Heightened manifest dream content: REM sleep deprivation can increase the amount of manifest dream content, which are dreams that are remembered when one wakes up.

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Answer:

It combines text, illustrations, icons, and data visualizations like graphs and charts in a carefully organized progression. So the primary difference between infographics and data visualizations is that data visualizations are generally briefer, more discrete pieces that can form one component of a larger infographic.

Explanation: