The essential roles including barrier protection, fluid balance, the release of particulate, initiation of immune responses, mucus and surfactant exhibit, and repair following injury.
What is respiration?Inhalation:
On inhalation, the pressure in the alveoli is high, hence the Oxygen diffuses to the nearby blood through the membrane.
Exhalation:
It is the process in which a person releases the air collected in the lung. During exhalation, the pressure in the alveoli is low, hence the carbon dioxide present in the blood is diffused out into the alveoli.
Therefore, the expandable structure of alveoli helps the respiratory system to follow its function.
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Write a proposed reaction for the oxidation-reduction of copper (II) iodide. Justify the choice of the substance that reduces the copper, based on the fact that a precipitate forms when copper nitrate and potassium iodide react, even though solubility rules would contradict this fact. Also, justify the choice using the atomic structure of potassium ion and iodide ion.
2Cu2^+ + 2I^- ----> 2Cu^+ + I2
The reaction performed in the experiment is;
2 Cu(NO3)2 + 4 KI → 2 CuI (s) + 4 KNO3 + I2
What is redox reaction?A reaction that happens when an oxidizing substance and a reducing substance come into contact. In the reaction, the reducing substance obtains electrons while the oxidizing substance loses electrons.
The precipitate results from the reduction of Cu2+ by iodide ions to Cu+, which is insoluble in water. Iodine is a good oxidizing agent, and since its outermost shell must be filled with one electron, this is why. On the other hand, because it may quickly lose its one electron, potassium makes a good reducing agent.
The oxidation - reduction equation is as follows;
2Cu2^+ + 2e ----> 2Cu^+ reduction half equation
2I^- ----> I2 + 2e. Oxidation half equation
Balanced redox reaction equation;
2Cu2^+ + 2I^- ----> 2Cu^+ + I2
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Explanation:
The proposed reaction for the oxidation-reduction of copper (II) iodide is as follows:
2 CuI + Cl₂ → 2 CuCl + I₂
The substance that reduces copper in this reaction is chlorine gas (Cl₂). Chlorine is capable of oxidizing iodide ions (I⁻) to form iodine (I₂), while itself getting reduced to chloride ions (Cl⁻).
Justification based on the formation of a precipitate:
When copper nitrate (Cu(NO₃)₂) and potassium iodide (KI) react, a precipitate of copper (II) iodide (CuI₂) forms, even though it contradicts the solubility rules. According to the solubility rules, most iodides are soluble, including potassium iodide. Copper (II) compounds are also typically soluble. However, in this specific reaction, the formation of a precipitate suggests that a redox reaction is taking place.
Justification based on atomic structure:
The atomic structure of the potassium ion (K⁺) and iodide ion (I⁻) provides further insight into the choice of chlorine as the reducing agent. Chlorine has a higher electronegativity than iodine, making it more capable of accepting electrons. When chlorine reacts with iodide ions, it gains electrons and gets reduced. The potassium ion, on the other hand, has a lower electronegativity than iodine. Therefore, it is less likely to accept electrons and participate in the reduction of copper ions.
In SummaryOverall, based on the fact that a precipitate forms when copper nitrate and potassium iodide react, along with the atomic structure of potassium and iodide ions, it is evident that chlorine gas is the substance that reduces copper (II) iodide in the proposed reaction.
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Which was Venter’s contribution to science?
Answer: Craig Venter was a geneticist who led the first draft sequence of the human genome.
Trapping has severely reduced the population of rabbits in an ecosystem, as shown in the bar graph below. What is the most likely effect this will have on other organisms?
a.
The snake population will decrease rapidly and the grass population will increase rapidly.
b.
The hawk population will increase rapidly and the rabbit population will decrease rapidly.
c.
The grass population will decrease rapidly, and the snake population will increase rapidly.
d.
The grass, rabbit, snake, and hawk populations will all decrease rapidly.
The correct option is (a)The snake population will decrease rapidly and the grass population will increase rapidly due to the reduced population of rabbits in an ecosystem.
what is a food chain?A food chain is a group of organisms that are connected in a single direction and through which nutrients and energy pass as one organism feeds another. The term "trophic level" refers to each level of the food chain. In certain cases, detrivores or decomposers are also included in the sequence of organisms that begin with producers and end with consumers.
A decline in one population will have an impact on an organism at a different trophic level of the terrestrial food chain, which is as follows: grass → rabbit → snake → Hawk
Because snakes rely on rabbits for food, a decline in the rabbit population will result in a decline in snake numbers. Since rabbits consume grass, the decline in rabbit populations will result in more grass.
Therefore, If the trapping is successful, the decline in snakes and the quantity of grass will allow the rabbit population to rebound, and eventually, the ecosystem's balance will be restored.
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Question 9 (Multiple Choice Worth 2 points)
(05.04 MC)
According to the hierarchal classification of a select group of organisms given below, which two organisms are most closely related according
to Linnaean taxonomy and why?
Kingdom ANIMALIA
Phylum CHORDATA
Class MAMMALIA
Order CARNIVORA
Felidae
Felis Panthera
catus
pardus
Pardalis
Canidae
Canis
familiaris lupus
Ursidae
orelos
Ursus
horribilus
Canis familiaris and Felis catus, because they belong to the same class
Felis catus and Panthera pardalis, because they belong to the same family
antnera parous and ursus nomnens necause they belong to the same orner
Ursus arclos and Canis lupus, because they belong to the same genus
The two organisms that are most closely related according to Linnaean taxonomy are Felis catus and Panthera pardalis, because they belong to the same family
What is taxonomic classification?Linnaean system of classification consists of a hierarchy of groupings called taxon. Each taxon is arranged in a hierarchical order.
The hierarchical arrangement of the taxon are as follows:
KingdomPhylum/DivisionClassOrderFamily GenusSpeciesThese taxa are arranged from the most inclusive to the most exclusive i.e. members of the same species are the most closely related in that order.
This suggests that Felis catus and Panthera pardalis are the most closely related because they belong to the same family.
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Which expression is equivalent to the given expression?
Which statement is a hypothesis?
Jada decides to investigate the effectiveness of hand sanitizers compared to soap. She says that hand sanitizers are as effective as soap in destroying bacteria. Many sanitizers have alcohol as their main component. She performs a study in which people use sanitizers for one week and then soap for another week. She then examines the bacterial count.
Answer:
When on the basis of certain facts about the object or subject we provide an explanation which is not proved is known as hypothesis.
For example, Jada says that hand sanitizers are as effective as soap in destroying bacteria.
Since, it is not proved by her and this statement shows just an explanation which is not experimentally found.
Thus, we can conclude that the statement hand sanitizers are as effective as soap in destroying bacteria, is a hypothesis.
What organelles of a cell is responsible for sensitivity?
Explanation:
Mitochondria are the organelle where ATP is generated through oxidative phosphorylation and several diseases are associated with mitochondrial dysfunction and oxidative stress. Mitochondria contain their own DNA and their number within the cell is finely regulated
what type of microscope creates a two dimensional image
2. What procedure did you use to complete the lab? Outline the steps of the procedure in full sentences. Virtual Lab: Water Erosion
The procedures that can be used to perform water erosion laboratory practicals are:
The use of detachmentTransportation Deposition.What is Water Erosion?This refers to the biological process where rock particles are broken down into smaller particles and how they are removed by water.
Hence, we can see that in a laboratory experiment, one would need different apparatus such as:
PitchersBottlesSoilWater, etc.This would be used to test the loss of water as it is put into the soil from the set of bottles to see how much the water is retained.
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fill the table given
Answer:
circle
expandsion
body part
under skin tissue
healthy muscle cells
fill in the blank blank factors depend on the number of organisms in a given area
Answer:
5 because those organisms multipliy or expand
Hi i just need a topic for essay SBI4U(Biology 12) thank you:)
Answer:
cellular respiration
Explanation:
easy and good
In experiments intended to measure conformity it was found that
In experiments designed to measure compliance, observed participants were found to tend to obey authorities, even if their orders contradict individual common sense.
What does the Milgram experiment say?The Milgram Experiment (or Milgram Experiment) was a scientific experiment developed by psychologist Stanley Milgram. The experiment aimed to answer the question of how observed participants tend to obey authorities, even if their orders contradict individual common sense.
With this information, we can conclude that Milgram wanted to investigate what circumstances led men to commit barbarism and observe how far they would be able to go if there was a superior responsible for their actions or if he gave them instructions to violate integrity and infer pain to the other.
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name the tissue responsible for transporting water mineral salts and food in plants
Answer:
Xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support.
Explanation:
Xylem tissue consists of a variety of specialized, water-conducting cells known as tracheary elements.
Hope it helps!
Answer:
xylem is the tissue responsible for the transportation of water, mineral salts.
How does the Ferris wheel move?
a. by bouncing
b. by spinning
c. by pushing
d. by rolling
The Ferris wheel spins upwards with the help of gears and motors, while gravity pulls the wheel back down again
d. by rolling ( ✔ )
a carbohydrate 7 monomers long has how many glycosidic bonds?
A. 1
B. 2
C. 3
D. 4
E. 7
Answer:
b. 2 is the answer to ur question
Earth scientists have concluded that the methods of harnessing energy that have been used over the past tWO
centuries, such as the burning of fossil fuels, are causing climates around the world to change more quickly and
suddenly than ever before in human history. Evidence includes increased air temperatures, rising sea levels, and the
shrinking of glaciers in Greenland, Alaska, and other regions of Earth. The most complex level of organizational
hierarchy that climate change could potentially affect is Earth's
O biosphere.
O communities.
O organisms.
O populations.
Answer:
populations
Explanation:
Alicia wants to model allopatric speciation for her science project. She
has a population of ants to use as her model. What should she do to
the ant population?
A introduce another species of ants to her population
B
introduce a new food source to part of her population
C
place a wall in their habitat that divides the population
D
remove the water source from the population
Answer:
A introduce another species of ants to her population
Explanation:
^^^
Which is a reactant for the photosynthesis reaction?
A. Adenosine triphosphate B. Oxygen C. Carbon dioxide D. Glucose
answer:
carbon dioxide !!
explanation:
hope this helps you !!
if i'm wrong pls let me know lol !!
What does a Diploid refer to?
a
A cell with half the number of chromosomes as the body cells.
b
A cell with the total number of chromosomes in the body cells.
c
A gene that is fully expressed when two different alleles are present.
d
A picture representation for predicting what offspring will look like.
Answer:
I think its a or d
Which of the following elements will not easily react with other elements? Explain why? – Carbon, Hydrogen, Nitrogen, Helium.
Answer:
Helium
It will not easily react with other elements as it is a noble gas. it has complete octate .the reactivity of an element depends on its outer most electron, ( or valency of it) but in helium there is no electron left to react.
Give three evidences from the Genesis account that the Flood was universal.
Hormones are chemicals made in the soil that affect parts of plants.
a. True
b. False
Hormones are chemicals made in the soil that affect parts of plants. The statement is false.
How are gibberellins able to affect other parts of the plant?Gibberellins stimulate the growth of shoots which increase the biomass and vegetative growth of plants. If vegetative growth increases, the root biomass is also increases.
So we can conclude that other parts of the plant are also affected due to gibberellin because it stimulates the growth of shoots which is the upper portion of the plant.
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¿What are Vertebrates?
[tex]{\huge \underline{{ \fbox \color{red}{A}}{\fbox \color{green}{n}}{\fbox \color{purple}{s}}{\fbox \color{brown}{w}}{\fbox \color{yellow}{e}}{\fbox \color{gray}{r } }}}[/tex]
They are further classified into: fish, amphibians, birds, reptiles and mammals.
I hope I've helped : )
9
B There are two missing words in each question Put them in
Example:
8
your parents got jobs and, if so, what they do?
Have your parents got jobs, and if so, what do they do?
When trains for London leave and how much a return ticket?
6
7
Where you buy your new mobile phone and how much it cost?
Where you last night and what you do?
Where I buy a cheap computer in this town and how I get there?
Answer:
that's all I can.
hope it helps. good day.
The table gives the average temperatures and elevations of the inner canyon and the north rim of the Grand Canyon.
Inner Canyon North Rim
average elevation 2,100 feet 8,000 feet
average temperature in July 107°F 77°F
average temperature in January 56°F 37°F
Why is there such a vast climate difference in these two areas of the Grand Canyon?
The average temperature in July 107°F 77°F. Thus, the correct option is C.
What is the average high temperature in the inner Grand Canyon?With a 34°F minimum and a 62°F maximum temperature. Phantom Ranch's inner-canyon temperatures typically vary from a low of 55°F to a high of 82°F. Summer (June–August) temperatures range from a little over 100°F (38°C) at the Grand Canyon's bottom to 80+°F (plus or minus) at the South Rim.
Around 1,500 feet higher than the South Rim, the North Rim is perched above the Kaibab Plateau at an altitude of between 8,000 and 9,000 feet.
On February 1st, 1985, the North Rim had a record-low temperature of -22 °F. At Phantom Ranch, the temperature reached 120°F on a number of occasions during the summer. Rough topography and deep gorges have a significant impact on solar heating and air movement. As a result, the canyon contains numerous unique microclimates.
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If a corn plant has a genotype SsTt, what are the possible genetic combinations that could be present in a single grain of pollen produced by the plant?
O St. sT
© Ss. Tt, ST, st
O ST, st
© ST, ST, St, st
The maize plant possesses the SsTt genotype.
The F1 generation will produce the children depicted in the punnet square after they are crossed.
What is pollen grain?A seed plant's pollen is a collection of microspores that typically takes the form of a fine dust. Each pollen grain is a tiny body with a unique shape and structure that develops in seed-bearing plants' male structures before being carried by a variety of agents (such as wind, water, insects, etc.) to the female structures, where fertilization takes place.
The genotype in question is a mono-hybrid heterozygous characteristic.
The pollen grains having a genetic combination like ST, St, sT, and st as depicted in the image will result from a cross between the two genotypes.
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which feature is characteristic of rivers?
1. Define communicable diseases. Give three examples.
2. Give two examples of each of the following types of microorganisms: a) Algae b) Fungi c) Protozoa.
3. What is pasteurization?
4. Mention any three ways through which pathogens are transmitted.
5. It is always suggested that not to eat anything from street hawkers. Why?
6. Ria thought of making curd. For this, she took lukewarm milk, mixed some curd into it and stir well. She kept the mixture in fridge. Next day she observed that curd was not set. Can you tell why the curd did not set?
7. Seema got cough and cold badly. Her teacher asked her to take rest at home and use handkerchief while sneezing and coughing. She obeyed her teacher.
a) Why should we keep a handkerchief on nose and mouth while sneezing or coughing?
b) What are the modes of transfer of diseases from infected to healthy person?
c) Do you think Seema’s teacher’s decision was right? Why?
d) What value of Seema is shown here?
8. Classify bacteria on the basis of their shapes.
9. Why are viruses considered to be the borderline between living and the non- living?
Answer:
1-Those diseases which can be transferred from one person to another person are called communicable diseases . Examples-Common cold ,HIV,chicken pox
2-Algae- spirogyra,volvox
fungi-yeast,mushroom
protozoa-plasmodium,amoeba
3-pasteurization, heat-treatment process that destroys pathogenic microorganisms in certain foods and beverages.
is water losing through transpiration harmful or benefical for plant
View attachment.
Select the TRUE statement(s)
- K.C was unable to recognize his family and usually forgot his name
-K.C’s bilateral hippocampal damage probably accounts for his anterograde declarative amnesia
-K.C’s case suggests that NO declarative memories are stored in the cortex
