It might not be possible to always determine the reactants and products in reactions because reactants can be products just as products can be reactants in some reactions.
What are reversible reactions?Reversible reactions are reactions that proceed in both forward and backward directions.
The forward reaction is for the synthesis of products while the backward reaction synthesizes the reactant back as they are known in non-reversible reactions.
For example, consider this reaction: [tex]A + B < --- > C + D[/tex]
In the forward reaction, A and B are acting as the reactant while C and D are the products. In the backward reaction, C and D are the reactants while A and B are the product.
In reversible reactions, the forward reaction proceeds, but as soon as products are formed on the other side, both forward and backward reactions occur simultaneously, although at an unequal rate.
Reaction continues until a chemical equilibrium is reached. Both the forward and backward reaction proceeds at an equal rate.
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33. Organisms with a cell wall cannot carry out
A. exocytosis.
B. active transport.
C. osmosis.
D. diffusion.
E. endocytosis.
:
Answer:
It is E. Endocytosis
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Describe the possible outcome of a PCR experiment in which (a) one of the primers is inadvertently omitted from the reaction mixture and (b) one of the primers is complementary to several sites in the starting sample.
The possible outcome of the PCR is The quantity of these strands would increment straightly with the number of cycles.
a. Just single DNA strands of a variable length reaching out from the staying preliminary would be gotten. The quantity of these strands would increment straightly with the number of cycles instead of geometrically.
b. PCR would yield a blend of DNA portions whose lengths compared to the separation between the position of the primer with a solitary binding site and the different destinations where the multispecific preliminary ties.
The DNA molecule is made from 4 nucleobases – adenine, cytosine, guanine, and thymine and may configure itself in some ways. It creates a four-stranded shape whilst 4 guanine bases form rectangular guanine is the simplest base capable of bond with itself.
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20 pts PLS HELP
Part 1
Which statement is part of the cell theory?
Responses
A. The flow of energy occurs within cells.
B. Every cell in an organism is identical.
C. Multiple cells are required to form life.
D.New cells arise from chemicals in the environment.
Part 2
What happens within the cytoplasm of a cell?
Responses
A. replication of DNA
B. maintaining of a cell's shape and structure
C. communication with other cells
D. majority of metabolic activity
The statement that describes the part of cell theory is: (A) The flow of energy occurs within cells.
The function that happens within the cytoplasm of a cell is (D) majority of metabolic activity.
Cell theory was put forward by Schleiden and Schwann. Its main formulations are that cell is the basic and structural unit of life, all cells arise from pre-existing cells and all the organism have one more more than one cell.
Cytoplasm is the gel-like liquid present inside the cell. It provides the medium for all the cell organelles to reside and perform their specific functions. Cytoplasm is the total fluid of the cell and the cell organelles, except the nucleus.
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One particular species of flowers comes in two colors: red and white. The red color allele, R, is dominant to the white color allele, r. Red flowersare more successful with reproduction since they attract more pollinators than the white flowers. Over time, what will most likely happen tothe R and r allele frequencies?A. R frequency will decrease, while r frequency increases.B. R frequency will increase, while r frequency decreases.C. Both frequencies will increase.D. Both frequencies will decrease.
As red flowers are more successful with reproduction than white flowers, the most likely to happen over time is that the R frequency will increase, while the r frequency decreases, due to natural selection.
The correct answer is option B.
Which 2 characteristics of water can explain almost every single one of water's properties?
Answer:
Explanation:
Water molecules have strong cohesive forces due to their ability to form hydrogen bonds with one another. Cohesive forces are responsible for surface tension, the tendency of a liquid's surface to resist rupture when placed under tension or stress.
Unit 1 Review Notebook Check
I Will give 40 points for this
will a solution of CO2 and water be acidic basic or neutral
Answer:
acidic !
Explanation:
Desertification occurs when
a.
temperatures are extremely hot causing nothing to be able to grow
b.
an area becomes so damaged, nothing can grow there
c.
there is consistent winds
d.
the only plants which will grow are high-water use plants
Desertification is the degradative process through which lands lose fertility due to different natural or human factors, affecting ecosystemic services. B) an area becomes so damaged, nothing can grow there
What is desertification?
Desertification is the degradative process of land due to different factors. These factors might be natural events (such as changes in climatic conditions) or due to human activities.
Desertification causes fertile soil loss. Consequently, ecosystems can not accomplish their regulatory functions -ecosystemic services-. There is a significant loss in productivity.
Only a few forms of life can grow in these affected areas. Plant species decrease and finally disappear in desertic regions.
Arid, semiarid, and subhumid dry areas are considered to be the most susceptible ones to suffer the effects of desertification.
The current climatic change and the increasing human activities have worsened the situation in several regions.
The correct option is b. an area becomes so damaged, nothing can grow there.
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Which is an example of a bioresource used to build a home?
A shingles for the roof of a house
B molten glass flattened into windows
C crushed rock for a gravel driveway
D lumber used to construct a house frame
The example of a bioresource used to build a home is as follows: lumber used to construct a house frame (option D).
What is a bioresource?A bioresource is any resource of biological origin i.e. that emanates from life.
This suggests that any material regarded as a bioresource must either be from a plant, animal or microbe etc.
According to this question, a lumber is a wood (plant) material sawn into planks or otherwise prepared for sale or use, especially as a building material.
Therefore, it can be said that the lumber used to construct a house frame is the example of a bioresource.
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If a man of blood group AB marries a woman of blood group A whose father was of blood group O, what different blood groups can this man and woman expect their children to belong to?
A man with blood group AB ----> Genotype [tex]I^{A} I^{B}[/tex]or [tex]I^{B}i[/tex]
A Father with blood group O ---> Genotype [tex]ii[/tex]
A woman with blood group A --> Genotype [tex]I^{A}i[/tex]
The children will have genotypes ---> [tex]I^{A} I^{A} , I^{A} i, I^{A} I^{B} , I^{B} i[/tex]
What is blood group?
The three alleles A, B, and O are responsible for controlling the major blood groups A, B, and AB, respectively. Due to the fact that humans are diploid, each genotype can only include a maximum of two of them. To put it another way, only two of these alleles can coexist in a single cell of a human at any given time.
IA, IB, and I are the three distinct alleles that can determine a person's blood type. I is the most common. These three alleles can be referred to as A (for IA), B (for IB), and O for the sake of simplicity (for i). Because we receive one blood type allele from our biological mother and one from our biological father, each of us has two ABO blood type alleles.
Therefore , according to the blood groups of father , man and woman , the children are most likely to have A , AB or B type blood group.
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I need help with this pleasePreventing Heart DiseaseHealthy Living HabitsChoosing healthy meal and snack options can help you avoid heart disease and its complications. Be sure to eat plenty of fresh fruits and vegetables.By living a healthy lifestyle, you can help keep your blood pressure, cholesterol, and sugar normal and lower your risk for heart disease and heart attack. A healthy lifestyle includes the following:Eating a healthy diet.Maintaining a healthy weight.Getting enough physical activity.Not smoking or using other forms of tobacco.Healthy DietChoosing healthful meal and snack options can help you avoid heart disease and its complications. Be sure to eat plenty of fresh fruits and vegetables and fewer processed foods.Eating foods low in saturated fats, trans fat, and cholesterol and high in fiber can help prevent high cholesterol. Limiting salt (sodium) in your diet also can lower your blood pressure. Limiting sugar in your diet can lower you blood sugar level to prevent or help control diabetes.For more information on healthy diet and nutrition, see CDC’s Nutrition, Physical Activity, and Obesity Program website.Healthy WeightBeing overweight or obese increases your risk for heart disease. To determine if your weight is in a healthy range, doctors often calculate your body mass index (BMI). If you know your weight and height, you can calculate your BMI at CDC’s Assessing Your Weight website. Doctors sometimes also use waist and hip measurements to calculate excess body fat. They may use special equipment to calculate excess body fat and hydration status.Physical ActivityPhysical activity can help you maintain a healthy weight and lower your blood pressure, cholesterol, and sugar levels. For adults, the Surgeon General recommends 2 hours and 30 minutes of moderate-intensity exercise, like brisk walking or bicycling, every week. Children and adolescents should get 1 hour of physical activity every day.No SmokingCigarette smoking greatly increases your risk for heart disease. If you don’t smoke, don’t start. If you do smoke, quitting will lower your risk for heart disease. Your doctor can suggest ways to help you quit.
To maintain proper heart health, 3 fundamental activities can be carried out: avoid smoking, maintain a healthy diet and exercise constantly.
Cigarettes contain many harmful substances that are toxic to the body and can cause many conditions, including hypertension, which affects arterial health.
Having a healthy diet refers to reducing the intake of fats and sugars since fats can accumulate in the bloodstream impeding the flow and affecting the force that the heart must apply to pump blood, this is a condition called atherosclerosis.
Finally, exercise prevents disease by preventing fat accumulation, improving blood pressure and stimulating antioxidant systems that neutralize reactive oxygen species that can be generated by harmful substances such as those in cigarettes. Therefore, it helps overall health including heart health.
Draw and label a model showing where the matter came from at the particle level to produce this particular kind of gas.
A particle model describes how the particles that make up a solid liquid or gas are arranged and how they move.
The particle theory of matter is a model that describes the arrangement and movement of particles in matter. Models are used to describe the physical properties of solids liquids and gases. Elements and compounds can be represented using particle diagrams. This is a box with colored spheres drawn to represent atoms or molecules.
These diagrams can represent the elements and compounds and their molecular composition by type of spheres and how they are connected. Certain chemical reactions can be represented using particle diagrams. In this diagram, the reaction mixture is represented both before the reaction occurs and after the reaction is as complete as possible. There are small spaces between particles in liquids but not as small as in solids.
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true or false?lighting fixes nitrogen in compounds so plants can use it too make protein
Nitrogen fixation by lighting is what we call abiotic fixation, a process of oxidation that occurs by the lighting, creating nitrogen oxides through atmospheric nitrogen. specifically for a plant are needed nitrates (NO₃⁻)and ammonium (NH₄⁺).
What’s the correct answer answer asap for brainlist I really need help someone answer please
Identify whether the statement is true or false, and why? “Global sea levels have not changed in the past, the fact that they are rising now could be very dangerous.”A. False, it should read “Global sea levels have risen very quickly in the past, so the change today could be very dangerous, but is not caused by humans.”B. TrueC. False, it should read “Global sea levels have changed in the past, the reason they are dangerous now is because the change is occurring very fast.”D. False, it should read “Global sea levels have changed in the past, but they are not changing today.”
The answer is the letter C. False, it should read “Global sea levels have changed in the past, the reason they are dangerous now is because the change is occurring very fast.”
*One of the reasons for this phenomenon is global warming and human
What characteristics does Charophytes have with land plants? (any three)
The Charophytes (green algae), have in common with the land plants the presence of chloroplasts containing chlorophylls a and b, the fact that those organisms store starch in their chloroplasts, the metabolic and hormone pathways in their cell wall, and the fact that the main molecule of their cell wall composition is the cellulose.
Which heart chamber receives the brightest red blood?
the right atrium
the right ventricle
the left ventricle
the left atrium
The heart chamber which receives the brightest red blood is referred to as the left atrium and is denoted as option D.
What is Heart?This is referred to as the central organ of the circulatory system and is responsible for the pumping of blood to other parts of the body. The blood contain nutrients and oxygen which is vital for the growth and survival of cells.
The left atrium is one of the chambers of the heart and it collects the oxygen rich blood from the lungs which has bright red color and empties into the ventricles which is then to be transported and distributed to other parts of the body.
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The chamber of the heart that receives the brightest red blood is the left atrium. That is option D.
What is the heart?The heart is a muscular hollow organ that is the major organ of the cardiovascular system that helps in pumping of blood to the whole parts of the body.
The heart is divided by valves and a septum into four major chambers that include the following:
The right atriumThe right ventricleThe left ventricleThe left atriumThe left atrium is known to be the first part of the heart that receives oxygenated blood from the pulmonary vein which contains more oxygen.
This makes the blood to appear bright red because of increased oxygen levels of the blood in left atrium.
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If your immune system can't actually stop you from getting ill, then why is it beneficial? Why is it evolved to work this way, instead of simply stopping every infection in its tracks?
The inmmune system is continuouly working in the human body. While no aggresive factore attacs the body the person feels no changes, however, when certain substances, germs or other factors enter the body the inmune system is activated. This happens when the body does not recognize those factores, which are called antigens.
When the inmune system is activated a number of proesses occur inside the human body. These processes generally allow the inmune system to identify the germ and learn how to fight it, so the next time the exact germ enters the body the inmune system will have information stored on how to fight it and the response will be faster.
Therefore, the first time a person encounters a certain disease he or she gets ill until the inmune system reacts and fights it. The next time the person encounters the same disease the person probably will not get sick.
The inmune system is beneficial because it allows the body to protect itself and save the information it needs to properly fight the disease in the future.
If the information on how to fight a specific germ is not available in the genetic material of the person then he or she, in orther to gain it, will eventually have to get ill or get vaccinated.
what does a scientist test when using a controlled experiment?
In a controlled experiment, the scientist changes an independent variable to study its effect on the experiment while all the other variables are kept constant.
Controlled experiments are those where all the variables are kept constant except the independent variables. This is done to increase the effectiveness and reliability of the experiments. The goal of controlled experiments is that the dependent variables should not ne affected or changed.
Independent variables are those that are the cause for the changes in the experiment. They themselves are not affected by the experiment but manipulation in them can change the other variables of the experiment called the dependent variables.
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A credit score of 500 and annual income
of $12,000 will get you approved for a
credit card?
True
False
Answer:
False
Explanation:
You need to have a higher annual income to be approved for a credit card.
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17. SC.912.L.16.1If a female of this species has one chromosome 12 with a blue gene and another chromosome 12with an orange gene, and has both number 19 chromosomes with short genes, she will producewhich of the following egg types?a. only blue short gene eggsb. only orange short gene eggsc.one-half blue short and one-half orange short gene eggsd. three-fourths blue short and one-fourth orange short gene eggs
Asumming that both genes mentioned, color and height, are autosomal, this female's genotype is BbSS (B: blue and b: organge; S: short).
The possible eggs' genotypes will be:
BS: blue and short.
bS: orange and short.
Thus, the correct answer is option C.
Which concept does this graph best illustrate?
A. a positive feedback loop
C. energy cycling
Time
Predator
B. exponential growth
D. a negative feedback loop
What is the function of structure W?
A. to attach the flower to the main stem
B. to protect the developing bud
C. to attract pollinators to the flower
D. to form the floral organs
The function of the structure W is to attract pollinators to the flower (option C).
What is a flower?A flower in botany is a reproductive structure found exclusively in group of plants called angiosperms (flowering plants), often conspicuously colourful and typically including sepals, petals, and either or both stamens and/or a pistil.
The parts of a flower are as follows:
PetalsSepalsPistil or carpel (female part)Stamen (male part)The petals of a flower is one of the component parts of the corolla of a flower. It applies particularly, but not necessarily only, when the corolla consists of separate parts i.e. when the petals are not connately fused.
Petals are often brightly colored as seen in the structure labelled W above. This colorful appearance is used to attract pollinators such as insects, butterflies for the process of reproduction.
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Answer:it’s c
Explanation:
study island
uestion 14 (1 point)Which one of the following is correct about mutations.O a) There are only small scale mutations.Ob) There are only large scale mutations.O c) There are both large scale and small scale mutations.
The correct option is c) "There are both large scale and small scale mutatios". Examples of small scale mutations are SNPs, which stands for Single Nucleotide Polimorphism. SNPs are changes in one nucleotide. On the other hand, there are large scale mutations, uch as achromosomal abnormlities.,
When population growth increases in an area what is happening to the birth rate and age structure if that population
When population growth increases in an area it affects the birth rate and age structure if that population by increasing the birth rate with a greater number of young organisms (Option a).
What is population growth?The expression population growth makes reference to all factors capable of increasing the number of individuals in a population independently of the carrying capacity of such population.
The main factors that positively affect population growth include a higher birth rate and emigration, as well as a decreased death, and migration flow. These factors are also able to affect the proportion of individuals at each age, thereby affecting the number of reproductive individuals that may increase population growth.
Therefore, with this data, we can see that population growth is based on the birth rate and emigration rate, which also affect the number of individuals at each age and therefore the reproductive features of the population.
Complete question:
When population growth increases in an area, what is happening to the birth rate and age structure of that population? a. increasing birth rate with a greater number of young organisms b. increasing birth rate with a smaller number of old organisms c. increasing birth rate with a smaller number of young organisms d. increasing birth rate with a greater number of old organisms
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What other adaptations might the cavefish have that may be of greater importance for the cavefish’s survival?There are also many examples of body structures in animals that show gradual changes over time. In some cases, these changes have reduced or removed the function of some body parts and organs. These reduced or lost structures are called vestigial structures. The human appendix and the leg bones of snakes are examples of this phenomenon. 1 Observe the drawings of the cavefish and the minnow shown in Figure 3. The fish are related to each other but the cave fish is blind and only has the remnants of an eye.
The cavefish it's a type of fish that lives in caves as its name says. Therefore, it has some adaptation that helps to survive in this specific kind of environment. This type of adaptation is called troglomorphism, and it implies evolutionary changes that help the cavefish to reduce the waste of energy developing structures that are not needed for the environment it lives in. Added to blindness (some species sense the environment using specialized cells found in the pineal gland), other characteristics are loss of pigment, energy-efficient swimming because of larger fins, and the loss of swim bladder.
What is a specialized internal cellular structure that is bound by one or more membranes?
O organelle
O cell wall
O ribosome
O flagella
Which type of bone would not have an epiphysis?
humerus (upper arm bone)
femur (connects hip to knee)
tibia (lower leg bone)
sphenoid (base of your skull)
Answer:
sphenoid (base of your skull)
Experiment about Fruit flies eating bananas to on exponential growth model
Fruit flies are observing logistic growth. Resources were initially limitless, and population growth was exponential. But as resources ran out, the population grew close to its carrying limits.
With exponential growth, a population's growth rate per capita (per person) remains constant regardless of population size, causing the population to expand exponentially as it grows larger.
In nature, populations may expand exponentially for a while, but ultimately, their growth will be constrained by the availability of resources.
The biological world does not perfectly suit the exponential growth concept: Fruit flies (and other animals) reproduce in whole numbers, not the model's first day's 1.8 infants, because they lay many eggs at once. Therefore, an increase of 2 flies every day is not particularly realistic.
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what is the part labeled 3?
Answer:
the part labeled 3 is the substrate
