What is the route of blood flow in a closed system?.
Answers
Answer:
In a closed circulatory system, blood is contained inside blood vessels and circulates unidirectionally from the heart around the systemic circulatory route, then returns to the heart again, as illustrated in Figure 21.2a.
Explanation:
Related Questions
(b)
The image below shows part of the surface of a leaf.
0.1 mm x 0.1 mm
The length and width of this piece of leaf surface are both 0.1 mm
Calculate the number of stomata per mm of this leaf surface.
Answers
Explanation:
You didn't attach a picture so i'll just explain how to find the number of stomatas/mm^2.
first you find the surface by multiplying the length by the width
0.1*0.1=0.01mm^2
now you count the numer of stomatas in the picture
in0.01mm^2 you have.........................x stomatas
in 1mm you have ...............................y stomatas
y=100x
A mechanism by which cancer cells can evade an immune response involves an alteration in the amount of MIC on the cell surface by _________. Group of answer choices cleavage of MIC at the cell surface by a protease decreasing the level of MIC transcription switching from a transmembrane form of MIC to a secreted form cytosolic degradation of MIC in proteasomes alternative mRNA splicing resulting in a truncated form of MIC that is no longer able to bind to NKG2D
Answers
Answer:
cleavage of MIC at the cell surface by a protease
Explanation:
The immune system refers to a complex network of cells and proteins that function to eliminate potentially tumorigenic cells on a daily basis. However, cancer cells show mechanisms in order to escape immune responses. MHC class I chain-related proteins A and B (MICA and MICB) are expressed in normal and tumorigenic cells where they act as ligands of the NKG2D receptor. The expression level of these proteins (MICA and MICB) is finely regulated by the activity of metalloproteinases (i.e., by protease-mediated cleavage), but this mechanism is altered in cancer cells. Recently, drug therapies that stimulate NKG2D mediated tumor destruction by reducing the cleavage of MICA and MICB from the surface of cancer cells have been developed.
which celestial object is the smallest
Answers
In 2009, the Hubble Space Telescope discovered the smallest object ever seen in visible light at the time within the Kuiper Belt. The Kuiper Belt Object (KBO) found was a mere 3,200 feet (975 meters) across and was 4.2 billion miles away.
2. How have marine iguanas adapted to life on the Galapagos Islands?
They have adapted to have shorter tails, making them better swimmers to find food in the water.
They have adapted to have longer tails, making them better runners to find food on the land.
They have adapted to have shorter tails, making them better runners to find food on the land.
They have adapted to have longer tails, making them better swimmers to find food in the water.
Answers
They have adapted to have longer tails, making them better runners to find food on the land. Thus, option B is correct.
Who is Darwin's finches of Galapagos Islands?Darwin gathered the pieces of the evidence that support his theory of the evolution. In this evidence the finches of the Galapagos are an important one. The remarkable difference in the beaks of finches supports the process of evolution.
The beaks of this isolated group of the birds have evolved to match their niche diets and were an important clue for Charles Darwin in developing his theory of evolution.
Therefore, They have adapted to have longer tails, making them better runners to find food on the land. Thus, option B is correct.
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Learning Task No. 3: Performance Task Sanitizer/Disinfectant 1. Chlorine 2. lodine 3. Vinegar Advantages 4TH QUARTER LEAP Disadvantages
Answers
Answer:
iodine
Explanation:
it has the maximum potential for the Chemical to leak down.
To the best of your ability, draw how two populations would be dispersed in each of the three types of speciation. Label each drawing as either "A" for allopatric, "P" for parapatric, or "S" for sympatric.
You may use circles to represent each of the populations.
Answers
Answer: You know, we went over this in class Karra...
Explanation: Review your lessons in class before completing the assessments.
Which characteristic is NOT common to all arthropods?
A.a segmented body
B.an external skeleton
C.jointed appendages
D.a backbone
Answers
Answer: D- A backbone
Hope this helps :)
Explanation:
a study designed to learn about the side effects of two drugs, 50 animals were given drug A and another 50 were given drug B. Of the 50 that. received drug A, 11 of them showed undesirable side effects, while 8 of those who received drug B reacted similarly. Find the 90, 95, and 99 percent confidence intervals for PA – PB
Answers
Given that the number of animals who received drug A is 50 and 50 received drug B. Among the animals who received drug A 11 showed undesirable side effects while among those who received drug B, 8 showed undesirable side effects. To find the 90%, 95%, and 99% confidence intervals for PA - PB.
the formula for calculating the confidence interval for the difference between two proportions can be used. Let's compute the values for 90%, 95%, and 99% confidence intervals for PA - PB as follows Calculation of Confidence intervals For the Difference Between Two Proportions Assumptions Random sample The samples are independent. Sample size is sufficiently large for large sample theory to be used.
let p1 be the proportion in sample 1let p2 be the proportion in sample 2let n1 be the sample size in sample 1let n2 be the sample size in sample 2The point estimate of the difference between two proportions is given as follows Given that the number of animals who received drug A is 50 and 50 received drug B. Among the animals who received drug A, 11 showed undesirable side effects while among those who received drug B, 8 showed undesirable side effects. To find the 90%, 95%, and 99% confidence intervals for PA - PB, the formula for calculating the confidence interval for the difference between two proportions can be used.
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There are a number of problems with implementing the idea of Maximum Sustainable Yield (MSY) in fisheries. What is a practical problem? Bycatch (catching non-target species) Enforcement (preventing illegal fishing) Economics (supply and demand) All of the above
Answers
All of the above are practical problems with implementing the idea of Maximum Sustainable Yield (MSY) in fisheries. Hence, option D is correct.
Bycatch (catching non-target species) is one of the practical problems with implementing MSY. When the fishing vessels catch species that are not their target, it is called bycatch. It is considered a significant challenge in fisheries because it can be wasteful, and often has negative effects on non-target species. Enforcement (preventing illegal fishing) is another practical problem.
A robust fisheries management system is required to ensure that fishing operations are conducted legally. Enforcement is critical in preventing overfishing and preventing unsustainable practices from developing in the industry. Economics (supply and demand) is another significant problem. Fisheries are influenced by supply and demand, just like any other market.
The price of fish is determined by the quantity of fish available and the number of people who want to purchase it. This has an impact on the size of the catch, and therefore, on the sustainability of the fishery. The focus of the fishermen is often on the short-term profits, which can lead to overfishing and the depletion of fish stocks.
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In the 1940s and 1950s, Dr Barbara McClintock studied mosaic colour patterns in corn and discovered their unstable inheritance and the underlying mechanisms. In 1983 she was awarded the Nobel Prize in Physiology/Medicine for her discovery, and is now considered one of the most influential geneticists of the 20th century. (a) Name two synonymous names for the genetic elements that Dr McClintock discovered
(b) What can these genetic elements do, and what can the consequences be for a gene and for a host genome?
(c) Which gene function do these elements require for their activity, and what are the two classes that these elements can be assigned to, and how do these two classes function in a host genome? (d) Why did Dr McClintock initially find resistance to publish her findings and in the scientific community, to the point that she did not publish these for 20 years, and why were her ground-breaking research findings a paradigm shift in the end?
Answers
They are known by two synonymous names: transposable elements or transposons. These elements can move within a genome and have various consequences for a gene and the host genome.
(a) The two synonymous names for the genetic elements discovered by Dr. McClintock are transposable elements and transposons. These terms refer to segments of DNA that have the ability to move or transpose within a genome.
(b) Transposable elements can have various effects on genes and the host genome. They can insert themselves into a gene, disrupting its function and causing mutations. They can also influence gene expression by inserting near regulatory regions, affecting the level of gene activity. Additionally, transposable elements can cause genomic rearrangements, such as duplications, deletions, or inversions, altering the structure of the genome.
(c) The activity of transposable elements requires specific genes called transposase genes. Transposase enzymes catalyze the movement of transposable elements within the genome. Transposable elements can be classified into two main classes: Class I retrotransposons and Class II DNA transposons. Class I retrotransposons transpose via a copy-and-paste mechanism, where the element is first transcribed into RNA, then reverse transcribed back into DNA and inserted at a new location. Class II DNA transposons, on the other hand, move through a cut-and-paste mechanism, directly excising from one genomic location and reinserting into another.
(d) Dr. McClintock initially faced resistance and skepticism from the scientific community, which led her to withhold publishing her findings for nearly 20 years. At the time, the prevailing belief was that genes were fixed entities with stable positions in the genome. Dr. McClintock's discovery of mobile genetic elements challenged this view and was initially met with skepticism.
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How do chloroplasts contribute to the function of the cell?
They convert energy from the sun into glucose.
They enclose the cell and separate it from other things in its environment.
They provide structure to the cell.
They convert glucose into usable energy.
Answers
Explanation:
Chloroplasts contribute to the cell by housing the photosensitive pigment chlorophyll which is needed to trap the sunlight. It then acts as the sight of photosynthesis.
Answer:
The correct answer to this question is: "They convert energy from the sun into glucose."
Explanation:
I hope this helps, have an amazing day!
Question 9
2 pts
A disease is diagnosed with an X-ray. This is an example of a_______of a disease
None of the listed answers are correct
Signs
Symptoms
Question 10
When a person suffers from the full set of symptoms, the person is in the________
2 pts
Disease
period.
Convalescent
Prodromul
Incubation
Question 11
2 pts
Which type of enzyme is directly involved in causing cellular damage during the disease process?
Endoenzyme
Exoenzyme
None of the listed answers are correct.
Answers
Question 9:
A disease is diagnosed with an X-ray. This is an example of a diagnostic test for a disease.
Question 10:
When a person suffers from the full set of symptoms, the person is in the disease period.
Question 11:
Which type of enzyme is directly involved in causing cellular damage during the disease process?
The correct answer is Exoenzyme. Exoenzymes are enzymes that are secreted by microorganisms and can cause damage to host cells during the disease process.
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an increase in blood co2 levels is followed by a(n) ____ in h+ ions and a(n) ____ in blood ph.
Answers
An increase in blood CO2 levels is followed by a(n) increase in H+ ions and a(n) decrease in blood pH.
When CO2 is produced as a byproduct of cellular respiration, it diffuses into the bloodstream and combines with water to form carbonic acid (H2CO3) through the action of the enzyme carbonic anhydrase. Carbonic acid then dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-).
An increase in blood CO2 levels leads to an accumulation of carbonic acid, resulting in an increase in H+ ions. These additional H+ ions contribute to the acidity of the blood, leading to a decrease in blood pH. The relationship between CO2 levels, H+ ions, and blood pH is regulated by the bicarbonate buffer system, which helps maintain the acid-base balance in the body.
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Indica que nivel de organización representa cada uno de los siguientes elementos ADN estómago neurona electrón átomo de oxígeno, agua, ser humano, músculo cardíaco, óvulo y sangre.
Answers
Answer:
Neuron- the level of organisation is cells.Because it s the functioning unit of nervous system.
The Blood's level of organisation is tissues because if is made of group of cells.
The stomach level of organisation is organ, because it is made up of group of cells and tissues to form part of the digestive system.
Heart muscles is made up of organs as it is the combination of tissues and cells therefore a muscular organ,
DNA -represents a molecular level,but because it is located in the cells , its represented this level.
Egg belongs to level of organisation which is cellular.
Oxygen atom level of organisation is.(cell)
water is a Compound.( tissues )since it is the combination of two atom cells( hydrogen and Oxygen)
Human being is organism.
electron level of organisations are the smallest particles.(cells)
Explanation:
Describe Okasaki fragments.
Answers
Answer:
Okazaki fragments are short sequences of DNA nucleotides which are synthesized discontinuously and later linked together by the enzyme DNA ligase to create the lagging strand during DNA replication.
Explanation:
Why is ∆Hf0 62.4 kJ/mol for I2(g), but 0.0 kJ/mol for I2(s)?
Answers
Answer:
12(s) is in its standard state.
Explanation:
PLS HELP IM TIMED!!
Fish eggs that are fertilized externally are typically clustered and covered in a thick, jelly-like substance.
What is most likely the function of this substance?
a) to protect the eggs and keep them consistently warm inside the parent's body
b) to protect the eggs and keep them safe from any harmful environmental conditions
c) to ensure that only a few of the eggs are fertilized by sperm since external fertilization is uncommon and risky
d) to ensure that only some of the eggs are fertilized by sperm so others can be fertilized internally
Answers
Answer:
Don't get me wrong but I think it's B
Explanation:
Answer:
The correct answer is B: to protect the eggs and keep them consistently warm inside the parent's body. It is correct on edge
Explanation:
Hope this helps and good luck:)
Which one of the following is a source of energy that is used by cells
A) Lighting
B) Glucose
C) Salt
D) Toddlers
Answers
Answer:
b
Explanation:
i am smart
When using cladograms, organisms are named and classified by their what?
Answers
Answer:
Linnaeus' system, organisms are grouped together and organized into seven types of categories. The categories are based upon structural characteristics shared by the organisms. They are, from largest to smallest – kingdom, phylum, class, order, family, genus, species.
• Describe the arteries (including specific regions of the aorta) that blood would travel through on its way from the heart into the lower limbs • Describe the pressure differences between the lun
Answers
The arterial system comprises of arteries that are blood vessels that carry oxygenated blood from the heart to other body organs. The heart has two main arteries: the aorta and the pulmonary artery.
The aorta, which is the largest artery in the body, carries oxygenated blood to different regions of the body, including the lower limbs.The aorta is divided into several regions, and each region supplies blood to different regions of the body. The following are the regions of the aorta:Ascending aortaArch of the aortaDescending thoracic aortaAbdominal aortaArteries that supply the lower limbs arise from the abdominal aorta. Specifically, the common iliac arteries arise from the abdominal aorta, and these arteries divide to form the external and internal iliac arteries. The internal iliac arteries supply the pelvic region, while the external iliac arteries supply the lower limbs.
The pressure in the left side of the heart is higher compared to that of the right side of the heart. This is because the left side of the heart pumps blood to the systemic circulation, while the right side of the heart pumps blood to the lungs.The pressure in the aorta is high, and it ranges between 120 mmHg to 80 mmHg during diastole. Blood pressure decreases as blood flows into the arterioles and capillaries due to the resistance offered by these vessels. In the lungs, the pulmonary arterial pressure is lower compared to the systemic arterial pressure. The pressure in the pulmonary arteries ranges between 15 mmHg to 30 mmHg. During exercise, the pulmonary arterial pressure may increase, but it never exceeds the systemic arterial pressure.
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Plant cells and bacteria both have cell walls. Many antibiotics work by breaking down the proteins that make up the cell wall, so bacteria become vulnerable to the human body's immune system.
Which statement explains why antibiotics do not break down cell walls in plants?
Responses
Plant cells are less complex than bacterial cells, and their cell walls are made of enzymes which prevent the antibiotic from breaking down the plant cell walls.
Plant cells are less complex than bacterial cells, and their cell walls are made of enzymes which prevent the antibiotic from breaking down the plant cell walls.
Plant cells are prokaryotic, and their cell walls are made of lipids which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are prokaryotic, and their cell walls are made of lipids which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are simple cells, and their cell walls are made of carbohydrates which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are simple cells, and their cell walls are made of carbohydrates which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are eukaryotic, and their cell walls are made of different proteins which prevent the antibiotics from breaking down the plant cell walls.
Answers
Antibiotics do not break down cell walls in plants because: Plant cells are eukaryotic, and their cell walls are made of different proteins which prevent the antibiotics from breaking down the plant cell walls. The last option is the correct answer.
What is Antibiotics?This is a type of substance that fight against bacteria. It is a very vital type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. They may either kill or stop the growth of bacteria.
cell walls a rigid, external layer that is specifically designed to give structural support and rigidity. It also keeps the interior components of the cell firm and safe from the external environment.
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Kasey complains of feeling tired often, so she drinks Diet Coke, coffee, and espresso
drinks. a. What do you think may be to blame for her lack of energy? Provide a few
examples.
b. What solutions would you recommend to Kasey to help with her fatigue?
Answers
Kasey's lack of energy could be attributed to several factors, including inadequate sleep, poor nutrition, excessive caffeine consumption, and lack of physical activity.
a. Inadequate sleep: If Kasey is not getting enough sleep or has poor sleep quality, it can lead to tiredness and lack of energy. She may need to assess her sleep schedule and make adjustments to ensure she is getting sufficient rest. To help with her fatigue, I would recommend the following solutions: Prioritize sleep: Kasey should aim for 7-9 hours of quality sleep each night and establish a consistent sleep schedule. Balanced diet: Encourage Kasey to incorporate nutrient-rich foods into her diet, including fruits, vegetables, lean proteins, and whole grains. It may be helpful for her to consult with a registered dietitian for personalized nutritional guidance.
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Is hypotonic active or passive transport
Answers
Answer:
The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion. area with a lower concentration. Osmosis is the diffusion of water. concentration is hypertonic, and the solution with the lower concentration is hypotonic.
Cell Transport-Passive and Active
you can look at it if you want more
Explanation:
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The water in the Buffalo River flows at an average speed of 5 km/hr. If you and a friend decide to canoe down the river at a distance of 15 km, how many hours will it take?
Answers
Answer:
3 hours
Explanation:
What kinds of hazards do volcanoes pose for people? O Ash and dust Destruction of land, homes, and cities , Poor air quality for breathing O All of the above
Answers
Answer:
All of the above
Explanation:
Volcanoes are very destructive, destroying homes and throwing ash all over the land and burning down many things like trees and forests with their magma
Drosophila (fruit flies) usually have long wings ( ) but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg). 56) If flies that are heterozygous for both the bent wing gene and the vestigial wing gene are mated, what is the probability of offspring with bent wings only
Answers
The probability of offspring with bent wings only when flies that are heterozygous for both the bent wing gene and the vestigial wing gene are mated is 25%.
This is because in genetics, the probability of offspring having a certain genotype is determined by the Punnett square, which is used to calculate the genotypic ratios of possible offspring from a genetic cross. In this case, the Punnett square would reveal a 4x4 grid in which each parent has a 50% chance of contributing either the bent wing gene (bt) or the vestigial wing gene (vg) to the offspring.
The resulting combinations would be 25% BB (both parents contributing bt), 25% btVg (one parent contributing bt and the other contributing vg), 25% Vgbt (one parent contributing vg and the other contributing bt), and 25% VgVg (both parents contributing vg). Thus, the probability of offspring with bent wings only would be 25%.
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and lenticels are both involved in exchange of CO₂ and O₂ . Why do stomata need to be able to close, but lenticels do not?
Answers
In leaves with a high ratio, stomata are present. The rate of evaporation is higher in leaves than in trunk due to the leaves' large surface area, thus to avoid significant water loss, stomata must be in close proximity.
The structures seen on the leaf epidermis are called stomata. They are in charge of both gaseous exchange and transpiration, the loss of water from plants. The structures found on the woody stems are called lenticels. They don't control transpiration; they are primarily in charge of gaseous exchange in plants. Not in lenticels but only in stomata, photosynthesis occurs. Stomata handle both gaseous and water exchange in plants, whereas lenticels exclusively handle gaseous exchange. Thus, plants do not need to store water in lenticels. To survive, plants must have stomata that store water.
As a result, they must be close together to stop excessive transpiration. To allow for gaseous exchange, stomata continue to function throughout the day. Because leaves have a larger surface area and plants have more leaves overall, which increases their surface area, more water evaporates from leaves. The trunk of the plant, which has lenticels, has a smaller surface area than its leaves. Thus, stomata must be close together to prevent excessive water loss from them.
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Complete Question:
Stomata and lenticels are both involved in the exchange of CO2 and O2. Why do stomata need to be able to close, but lenticels do not?
A firm has $820 in inventory, $3,200 in fixed assets, $1,210 in accounts receivable, $890 in accounts payable, and $360 in cash. What is the amount of the net working capital?
a. $4,700
b. $5,590
c. $3,600
d. $2,390
e. $1,500
Answers
The net working capital for the firm is $1,500, calculated by subtracting current liabilities from current assets, the correct option is (e).
To calculate the net working capital, you need to subtract the current liabilities from the current assets.
In a company's financial statements, the formula for calculating current assets can be expressed as the sum of inventory, accounts receivable, and cash.
Current Assets = Inventory + Accounts Receivable + Cash
Current Liabilities = Accounts Payable
Using the given values:
Current Assets = $820 (Inventory) + $1,210 (Accounts Receivable) + $360 (Cash)
= $2,390
Current Liabilities = $890 (Accounts Payable)
The formula to calculate Net Working Capital is derived by subtracting Current Liabilities from Current Assets.
Net Working Capital = Current Assets - Current Liabilities
Net Working Capital = $2,390 - $890
= $1,500
Therefore, the amount of net working capital is $1,500.
Hence, the correct option is (e).
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Could you guys please do these for me!!
Answers
Answer:
Explanation:
1.observation
2.hypothesis
3.inference
4.experient
5.problem
6.conclusion
7.problem
Kudzu is a vine that was brought to the us from japan to prevent erosion once here kuduz became invasvie what role does kuduz most likely play in the environment in the us
Answers
Answer:
Kudzu in the United States has become an environmental concern.
It is naturally coded to spread quickly. The advantage to that is that it was useful in the prevention of erosion and management of the landscape.
Presently, it is creating an ecological imbalance. Kudzu is very efficient at collecting and converting sunlight more than the local plant species and even tree plants. The competition from Kudzu is so tough, tree plants are being starved off of soil nutrients and sunlight and are unable to survive.
Even the wildlife are affected as the crops which they forage on cannot are outcompeted by Kudzu.
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