In a natural flow, substances travel from high- to low-concentration locations.
Passive transport is what kind of transportation is it?Ions and molecules migrate along their respective concentration gradients during passive transport, a kind of cellular transport. The drug has a tendency to travel from a region of higher concentration to an area of lower concentration, according to this.
In reality, molecules migrate along their concentration gradient; passive transport just expedites this motion or permits molecules to traverse the membrane that would not otherwise be able to do so.
The lungs' alveoli, where oxygen is found, are where it diffuses into the blood's erythrocytes and plasma. Molecules travel from a high concentration to a low concentration through a process known as diffusion.
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describe how the mammalian heart is adapted to it's function
Answer:
The ventricles are thick walled; to pump blood to the lungs and the rest of the body. The left ventricle has thicker wall to create more pressure because it pumps blood for longer distances round the body; while the right ventricle pumps blood to the lungs close to the heart.
what are some benefits of alternatives to pesticides?
Answer:
Alternatives to insecticides
Companion planting: planting certain types of plants will keep some pests away. “Soft” chemicals: soap, stinging nettles, and rhubarbs provide excellent alternatives to pesticides. Parasites: certain pests are often easily targeted by specific parasites.
Which phase occurs immediately after a full moon?
waxing gibbous
waning crescent
waning gibbous
waxing crescent
*Please Hurry!*
Which principle tells us that this area has undergone tilting?
a. original horizontality
b. cross-cutting
c. superposition
d. inclusions
Answer:
A.
Explanation:
original horizontality
The heart is important for transporting oxygen to the muscles when we exercise. How does the heart rate change when we go from sitting on a chair to running up the stairs?
A. The heart rate stops.
B. The heart rate gets slower.
C. The heart rate gets faster.
D. The heart rate stays the same.
Answer: C. The heart rate gets faster.
Explanation:
its true also give brainliest
The heart rate gets faster
Explanation:
C. Because when you are sitting your heart rate is chill put if you're moving really fast that means your heart rate is going up because you have to deep breaths over and over when you stop running.
describe the mass and charge of particles you find in the nucleus and in the electron cloud.
Proton is the positively charged particle with a charge equivalent to 1.6×10−19C .
Neutron is a neutral charged particle i.e. zero charge.
Electrons are negatively charged particle with a charge equivalent to −1.6×10−19C .
Protons and Neutrons are inside the nucleus of an atom and contribute to the most of the mass of the atom. Electrons are revolving around the positively charged nucleus in quantized energy shells.
why do spider bites itch?
Animals with exoskeleton are called
Answer:
Examples of animals with exoskeletons include insects such as grasshoppers and cockroaches, and crustaceans such as crabs and lobsters, as well as the shells of certain sponges and the various groups of shelled molluscs, including those of snails, clams, tusk shells, chitons and nautilus.
Explanation:
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What happens if you place four zip bags of apples sitting out in a dark for a week. What would be the observation for all four apples…
Answer:
They would all start to decompose and become a big pile of mush because they are not exposed to light as well
Pls answer fast!!!! Timed!!!
Which of these descriptions best contrasts safety knowledge for cows and horses?
A. Horses have a definite flight zone, whereas cows do not
B. Cows will startle at sudden movement or noise, but horses do not.
C. Cows have a definite flight zone, whereas horses do not.
D. Cows have 360-degree vision, but horses do not
Answer:
Cows have a definite flight zone, whereas horses do not. So the answer is C.
What adaptations do trees have in the rainforest?
Question 7 options:
deep roots that do not spread out over a great distance
deep roots and spread their roots out over a great distance
short roots that do not spread out over a great distance.
short roots and spread their roots out over a great distance
Answer:
the answer is c
Explanation:
i took the quiz and got it right
The adaptations trees have in the rainforest are short roots that do not spread out over a great distance.
How are adaptations necessary in ecology?All organisms need to adapt to their habitat to be able to survive. This means acclimating to be able to survive the climatic conditions of the ecosystem, predators, and other species that contend for the same food and space.
Thus, the correct option is "C".
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An idea based on observations with no experimental evidence is a:
a.
Hypothesis
c.
Theory
b.
Model
d.
Law
Please select the best answer from the choices provided
A
B
C
D
Answer:
a
Explanation:
What is the difference between Gene Pool, Genetic Drift and Gene Flow?
Answer:
Genetic drift is referred to the changes in allele frequency in a gene pool. Gene flow is the process of alleles moving from one population to another.
Explanation:
what are the keys to a strong lab procedure?
Answer:
Purpose: A brief description of why the experiment is being performed. Include details about the experiment, such as the methods used, a specific chemical reaction(s), and/or anticipated product.
Hypothesis: Provide a statement or two about the anticipated outcome of the experiment.
Experimental Procedure: A step-by-step description of the experiment including the chemicals, equipment, and/or methods used. Complete sentences must be used for the description. DO NOT simply copy the procedure from a lab manual or a handout. Condense the given procedure into steps so that you can understand and follow them.
Laboratory Safety: Give a complete, descriptive listing of the safety precautions, hazards, or other safety procedures that are needed for this experiment.
Experimental Data: Record all data resulting from the experiment in your laboratory notebook. The experimental data should be recorded in tabular form. Do not record your experimental data in your laboratory manual.
Observations: This section is used to record any qualitative observations and notes on the changes to the experimental procedure. Sudden bursts of scientific insight or other information during the experiment that may aid in the interpretation of the data generated are to be entered in this section. No points will be awarded when the observations are recorded outside of the laboratory. It is also important that you record your unknown number in this section of your notebook.
Calculations: Present outcome/summary of data analysis using tables, Excel graphs, and/or figures. List separately all pertinent mathematical equations followed by a sample calculation for each. Use the recorded data from the experiment when performing the calculations.
Results/Discussion: Questions that should be addressed in this section may include: Did the experiment work, and if not, why not? Were the results obtained in the experiment those expected based on the laboratory procedure? If the experiment was to be repeated, what improvements would be made? What types of errors occurred and how could they be corrected? How did the observations play a role in the outcome of the experiment? When applicable, you should compare your experimental value(s) to that of a published, literature value(s), commenting on the accuracy of your technique.
Conclusion: Summarize the findings of the experiment, which must include the final results of the experiment, e.g., the percent yield of a reaction, the identity of an unknown, etc. Look back at the purpose and hypothesis of your experiment and assess whether or not you met your goal in performing the experiment.
References: Include all pertinent information such as, your laboratory manual, textbooks, web sites, and any other library resources used in the preparation of your laboratory report.
Please give me the correct responses.Only answer if you're very good at science/biology.Please don't put links to websites or else I'll report you.
Scientists believe Polar Bears have evolved from a group of Brown Bears that became an isolated population during a time when the Earth's climate began cooling down.What are some adaptations that make Polar Bears different from Brown Bears and what do you think caused the adaptations to occur?
Answer:
One adaptation is white fur. There was probably one white cub born to a brown bear mother, and the fur helped camouflage it for safety and later, hunting. This bear would have been more successful in hunting in the arctic, so it was more likely to reproduce and pass on the white fur genes. A second adaptation is the long claws of brown bears that are used for digging through vegetation would have shortened to be safer on ice. Polar bear paws also have little sticky bumps on their paws for gripping ice.
A third adaptation is that polar bears don't hibernate in winter. In winter, there is a lot more food available to them, so they need to stay awake. A fourth adaptation is their hair is also now water repellent, because most of their food comes from the sea. A fifth adaptation is in their digestive system. Polar bears don’t digest carbohydrates as well as brown bears, because their diet has much more fat than anything else. Polar bears hunt seals and can convert the blubber into fat for their bodies to live off of when food is scarce.
If the black line represents a reaction without an enzyme and the red line represents the same reaction with the addition of an enzyme, what can be said of the relationship between the use of an enzyme and the energy of the reaction?
A.
Less energy is released by a reaction without an enzyme.
B.
More energy is absorbed by reactions without an enzyme.
C.
More energy is absorbed by a reaction with an enzyme.
D.
Less energy is released by a reaction with an enzyme.
Answer:
more energy is absorbed by reactions without an enzyme.
Answer:
D.
More energy is absorbed by reactions without an enzyme.
Explanation:
Need help with this!! I’m not good at writing these.
Answer:
The difference between ethical, and finally scientific questions, are based upon their root word. Such as an ethical question may involve race and heritage, while a legal question may involve anything that involves the law such as court questions and can be resolved by the judge not the jury. Finally scientific questions can involve a question thats mainly based around science such as items that you can test or measure.
When a patient experiences respiratory alkalosis, the
physiological compensation will be what?
Answer:
Respiratory alkalosis results from excessive ventilation (hyperventilation). In respiratory alkalosis, Pco2 falls, leading to an increase in pH (alkalosis). If the alkalosis persists for more than 12 hours, the alkalosis may be partially compensated by decreased renal H+ excretion. During respiratory alkalosis, HCO3− may fall acutely owing to equilibration with depleted CO2. There is a 2 mEq/L decrease in HCO3− per 10 mm Hg decrease Pco2 that is chemical and not part of the renal compensation. Common causes of respiratory alkalosis include hyperventilation from voluntary effort (anxiety) or stimulation of central respiratory centers secondary to meningitis or a fever.
Explanation:
Which statement BEST expresses the idea that emotions are like a GPS system?
Answer:
Where's the full question?
Explanation:
True or False: The larval stage of the sea urchin is called the pluteus.
Answer:
False
Explanation:
it is called planktotrophs.
Answer:
larva, which is called a pluteus, has a small, wartlike bud that grows into the adult while the pluteus tissue disintegrates. In both examples it is as if the organism has two life histories, one built on the ruins of another.
Explanation:
hope this helps :)
As you are studying for your biology test, your stomach starts to make noises and give you hunger pains. You decide to get up, walk to the kitchen, and get yourself a snack. Explain FULLY and in detail what steps your body systems would be going through during this whole process.
Explanation:
Digestive system takes place in the stomach and also proteins
How is the instructions for your traits carried on a DNA molecule?
Sequence of the nitrogen bases
In the bond between the phosphate and the sugar
O In the Deoxyribose Sugar
O In the phosphate group
Sequence of the nitrogen bases
Study the following statements, which compare the method of fermentation preferred by yeasts to they type of fermentation that may occur in human muscle cells. i. Yeasts produce CO2 during fermentation, but human muscle cells do not. ii. Different metabolic end products result from the two types of fermentation. iii. Yeasts produce more ATP per glucose in their fermentation than do human muscle cells. Choose the correct answer from below.
Answer:
Only one of the three statement is true; and that is,
(ii.) Different metabolic end products result from the two types of fermentation
Explanation:
Fermentation is the process by which organic molecules such as glucose are broken down into smaller molecules to extract energy as ATP in the absence of oxygen.
Fermentation is carried out by many organisms including man.
In man, fermentation occurs in very active skeletal muscles such as in an athlete running. It involves the reduction of pyruvate produced from the glycolytic pathway to lactate in the muscles. The net yield of ATP from glucose breakdown to produce lactate is 2 ATP molecules.
In microorganisms such as yeast, the fermentation product of py ruvate derived from glycolysis is ethanol and carbon dioxide, CO₂. The net ATP yield in fermentation of glucose in yeast cells is also 2 ATP molecules.
From the options provided in the questions, the correct option is:
Only one of the three statement is true and that is that, ii. Different metabolic end products result from the two types of fermentation.
These weeds are growing in a farmer's field. The weeds compete with the soybean plants the farmer grows, so he needs to get rid of them. For a few years, the former relies on manually removing the woods, but that is labor intensive and limits how much crop he can grow. The farmer decided to change his crop to genetically modified soybeans that are herbicide resistant. This allows the farmer to use chemicals to remove the weeds. With this GM soybean, the chemical kills the woods but does not harm the crop. For many years this works, and allows the farmer to expand his farm and grow more soybeans. But then, one of the farmer's fields has a large weed plant remaining after the field has been sprayed with herbicide
1. Which of the following is the likely reason the weed has remained?
a. The weed needed to be resistant in order to survive, so it became resistant
b. A mutation appeared in one weed plant that made that weed not susceptible to the herbicide
2. Which of the following is likely to happen if that weed stays in place?
a. The trait will spread to nearby weeds
b. The weed will survive long enough to reproduce
c. In time, the herbicide will no longer be effective on that field.
Answer:
1) A mutation appeared in one weed plant that made that weed not susceptible to the herbicide ( B )
2) The weed will survive long enough to reproduce ( B )
Explanation:
1) The most likely reason the weed remained is : A mutation appeared in one weed plant that made that weed not susceptible to the herbicide
The weed plant must have undergone some mutation in order to be resistant to the herbicide which would kill the weed before now
2) The most likely thing that will happen if the weed stays in place in that farm is : The weed will survive long enough to reproduce
The trait or mutation of the weed cannot just spread to other weeds nearby it can only spread by reproducing more weeds of same mutation
Pls answer
The human body needs minerals to survive. Without
minerals, the body could not function properly. The minerals
that make up rocks are the same minerals that someone
might eat in a bowl of cereal! The body needs about 80
different types of minerals to function properly. Iron enriches
the blood, salt maintains fluid balance, calcium fortifies the
bones, and fluorine strengthens the teeth. Most vital
minerals can be absorbed into the body from eating plants
and lean meats. However, many food manufacturers add
minerals to their products to make them more desirable to
consumers. Eating a balanced diet can ensure that the
proper amount of these essential minerals is ingested.
Question:
The passage tells us that "many food manufacturers add minerals to their products to make them more desirable to consumers." Do you think that this is a good idea? What are the pros and cons?
Answer:
You have to put down what you think and not what other people thing
Explanation:
You can simply answer this question yourself by doing research or just thinking if its a good idea
Eating vegetables and lean meats can help the body absorb the majority of essential nutrients. However, many food producers add minerals to their products to increase customer appeal.
What are nutrients?Chemical elements known as nutrients are present in all living things on Earth. They are essential to the survival of all living things, including humans, animals, and plants.
The breakdown of food by nutrients provides energy for living things. They are utilised in every bodily function of an organism.
The majority of vital nutrients can be more easily absorbed by the body when veggies and lean meats are consumed.
To boost consumer appeal, several food companies do, however, add minerals to their products.
Although processing has many advantages, it can also be harmful and reduce the nutritional value of food.
For instance, blanching causes vitamin and mineral leaching losses. Additionally, during processing, milling and extrusion might result in the physical removal of minerals.
Thus, these are some pros and cons of the given scenario.
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For the voltage-gated sodium channel to allow sodium into the cell:_______.
a. the activation and inactivation gates must both be open
b. only the activation gate must be open
c. only the inactivation gate must be open
d. the inactivation gate must be closed shortly before the activation gate opens
e. the activation and inactivation gates must both be closed
Answer:
The correct option is - (a) the activation and inactivation gates must both be open.
Explanation:
Option (a) is correct because of the following reason -
The axonal membrane is at its natural resting potential until an action potential occurs, and [tex]Na^+[/tex] channels are deactivated and blocked on the extracellular side by their activation gates. The activation gates open in response to an electric current, allowing positively charged [tex]Na^+[/tex] ions to flow into the neuron through the channels. When enough [tex]Na^+[/tex] has penetrated the neuron and the membrane potential has reached a certain level, the [tex]Na^+[/tex] channels inactivate themselves by closing their inactivation gates at the height of the action potential. The inactivation gate can be thought of as a "plug" tethered to the intracellular alpha subunit's domains III and IV. When the inactivation gate is closed, the flow of [tex]Na^+[/tex] through the channel is stopped. As a result, both the activation and inactivation gates must be open to enable sodium ions to enter the cell.
Hence , the correct option is (a).
Which phrases describe the open-ocean zone? Check all that apply.
very little sunlight
Ofew nutrients
low temperatures
low density
located near coasts
Answer:
Very Little Sunlight
Few Nutrients
Low temperatures
Explanation:
It was correct on the test.
Hello, t8j5gq6rzt! I hope I can answer your question.
The open-ocean zone has low temperatures because there's little sunlight. So you will want to check:
Very little sunlight
Low temperatures
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Energy extraction and the complete oxidation of foodstuffs requires three stages. The energy extracted from fuels is converted to ATP. Select the statements that are true for the different stages required for energy extraction and complete oxidation of foodstuffs.
A. In the first stage, macromolecules are converted to monomers, and a small amount of ATP is produced.
B. In the first and second stages the majority of ATP needed for cellular processes is produced.
C. In the third stage, fuel molecules are completely oxidized to CO2 , and most of the ATP needed for cellular processes is produced.
D. In the third stage, fuel molecules are completely oxidized to CO2 , and a small amount of ATP is produced.
E. In the second stage, monomers are broken down, and a small amount of ATP is produced.
F. In the third stage, fuel molecules are completely oxidized to CO2 , and no ATP is produced.
Answer:
C. In the third stage, fuel molecules are completely oxidized to CO2 , and most of the ATP needed for cellular processes is produced.
Explanation:
The three stages in the generation of energy from the oxidation of foodstuffs are given below:
First stage - This stage is the preparation stage and no useful energy is produced in this stage. In this stage, large molecules in food are broken down into smaller units. Proteins are broken down to amino acids, polysaccharides to simple sugars such as glucose, and fats are broken down to glycerol and fatty acids.
Second stage - In this stage, the various small molecules from the first stage are degraded to simple units (mostly acetyl-CoA) that are useful in metabolic activities of the body. Few ATP molecules are generated in this stage.
Third stage - In this final stage, most of the ATP required for cellular processes is produced from the complete oxidation of the acetyl unit of acetyl CoA to CO₂ in the citric acid cycle as well the oxidation of the electron carriers NADH and FADH₂ in oxidative phosphorylation.
What happens in crossing over? Why is it important for sexually reproducing organisms, and what is one of the consequences of errors in crossing over?
Answer:
Crossing over increases the genetic variation
Errors in crossover formation result in chromosomal rearrangements (duplications and deletions) and may also cause chromosome nondisjunction
Explanation:
Crossing over, also known as recombination, refers to the exchange of genetic material (DNA) between non-sister chromatids of homologous chromosomes during meiosis. Crossing over increases the genetic variation of the resulting gametes, allowing different genetic combinations to be passed from parents to offspring. Unequal crossing over is a type of error associated with chromosomal duplication and/or deletion events. Unequal crossing over occurs when homologous sequences are not paired precisely. Moreover, errors in crossing over may also cause chromosome nondisjunction, thereby leading to aneuploidies.
Organisms that live in similar environments, such as the ocean, often have similar adaptations. This is often due to
A. convergent evolution
B. coevolution Proton
C. gradualism
D. sexual selection
Answer:
A.
Explanation:
Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time.
Organisms that live in similar environments, such as the ocean, often have similar adaptations, and this is often due to convergent evolution, which is in Option A, as convergent evolution is a process by which organisms that live in similar environments adapt.
What are coevolution and convergent evolution?Convergent evolution occurs because the same selective pressures are acting on the organisms, leading to the development of similar adaptations, such as streamlined bodies and fins, in many species of fish that live in the ocean and this is due to convergent evolution.
Hence, organisms that live in similar environments, such as the ocean, often have similar adaptations, and this is often due to convergent evolution, which is in Option A, as convergent evolution is a process by which organisms that live in similar environments adapt.
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