Explanation:
By osmosis, due to the difference in osmotic pressure on either side of the membrane, the water passes through the membrane, which means that the water moves from high osmotic pressure / concentration regions to low pressure / concentration regions to a stable state. Thus, water moves from hypotonic regions (low solute concentration) to hypertonic regions (high solute concentration).
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In biology, osmosis is the diffusion of water across a semipermeable membrane. A hypertonic solution has a higher solute concentration, causing water to move into the bag. A hypotonic solution has a lower solute concentration, causing water to move out of the bag.
Explanation:Hypertonic and Hypotonic SolutionsIn biology, osmosis refers to the diffusion of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. When comparing the solution inside the dialysis bag and the solution outside the bag, we can determine their osmotic relationships.
Hypertonic SolutionA hypertonic solution has a higher solute concentration compared to the solution it is being compared to. If the solution inside the dialysis bag has a higher solute concentration than the outside solution, it is hypertonic. In this case, water will move from the outside solution into the dialysis bag, causing the bag to swell or gain water.
Hypotonic SolutionA hypotonic solution has a lower solute concentration compared to the solution it is being compared to. If the solution inside the dialysis bag has a lower solute concentration than the outside solution, it is hypotonic. In this case, water will move from inside the dialysis bag to the outside solution, causing the bag to shrink or lose water.
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A cell wall is present only in a) Bacteria, b) Protozoa, c) Algae, d) Virus
Answer:
B
Explanation:
Answer:
cell wall
Explanation:
because nothing would be able to protect the cell
What is natural selection?
a process that selects variations that help with survival and that spreads the variations to more offspring
a process through which nature selects an individual within a population for extinction
a process that causes all populations to gradually increase in size
a process that causes random variations to appear in the offspring of every generation
Answer:
The answer to this question should be the first option. A process that selects variations that help with survival and that spreads the variations to more offspring
Answer:
The correct answer is a process that selects variations that help with survival and that spreads the variations to more offspring.
Explanation:
Natural selection is a phenomenon proposed by Charles Darwin 140 years ago. From its definition the theory of evolution is born.
This process occurs between entities with variation, inheritance and multiplication and the different evolutionary formations that give way to new species through survival and reproduction.
In summary, natural selection is the process of formation of living beings so that they can survive and develop.
How do changes in incoming solar radiation contribute to temperature increases
Answer:
The steps most affected by the increase in greenhouse gases are 3. Heat is absorbed by the atmosphere and 4. The atmosphere re-releases heat, warming Earth's surface and lower atmosphere.
Explanation:
The unit “GtC” is used throughout the lab and stands for gigatonnes of carbon. What is one GtC equal to?
A: one billion kilograms of carbon
B: one hundred kilograms of carbon
C: one thousand kilograms of carbon
D: one trillion kilograms of carbon
Answer:
B
Explanation:
The unit “GtC” is used throughout the lab and stands for gigatonnes of carbon. In this, one GtC is equal to one trillion kilograms of carbon. Thus, the correct option is D.
What is unit conversion?Unit conversion is a multi-step process which involves multiplication or division of a number by a numerical factor. There are different ways to measure the weight, distance, and temperature of a substance. In several countries, distance is measured in kilometers, weight in kilograms, and temperature is measured in units of celsius.
In order to have accuracy and avoid confusion in the measurements, we need to convert one unit to another unit. For instance, we do not measure the length of a pencil in the kilometers. In such a case, one has to convert the unit from kilometer (km) to centimeter (cm).
1 GtC = 1 billion tonnes
1 billion tonnes = 1 trillion kilograms
1 GtC = 1 trillion kilograms
Therefore, the correct option is D.
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A test tube fell on the floor and broke! What would you do? Check all that apply.
Call 911.
Using your hands, carefully pick up the broken test tube and dispose of the broken glass appropriately.
Tell your teacher right away.
Try to recover the mystery food solution from the broken pieces so you can continue to test it.
Answer:
tell the teacher right away!!
Answer:
using hands CAREFULLY pick up broken pieces
tell teacher right away
4. At which plate boundary is one lithospheric plate
sliding under another?
A) Nazca Plate and Antarctic Plate
B) Pacific Plate and Indian-Australian Plate
C) Indian-Australian Plate and Antarctic Plate
D) Nazca Plate and Pacific Plate
Answer:
B) Pacific Plate and Indian-Australian Plate
Explanation:
In convergent boundaries, one of the involved plates sinks under the other plate in a process known as subduction. The correct option is B. Pacific Plate and Indian-Australian Plate.
Plate boundaries
There are three types of plate boundaries according to the interaction between plates.
Plate boundaries can be either Convergent, divergent, transforming
Convergent BoundaryCollision area between two plates.Two oceanic plates might collide, or one oceanic plate with a continental one.In this last case, the oceanic crust sinks under the continental plate, and magma rises to the surface by crevices.The thicker and older plate subduces under the other plate.Volcanoes get formed on the superior plate since magma flows over it.Plates's movement might produce earthquakes.
Example
An example of a convergent boundary is the union between the Pacific Plate and Indian-Australian Plate.
The Pacific plate is subducting under the Indian-Australian Plate since it is the oldest and thickest one.
These movements originated the Kermadec Trench and the Tonga and Kermadec island arcs.
The correct option is B) Pacific Plate and Indian-Australian Plate.
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A diagram that shows the energy in each trophic level of an ecosystem is called______
A. an ecological pyramid
B. a food web
C. a food chain
D. a numbers pyramid
A diagram that shows the energy in each trophic level of an ecosystem is called an ecological pyramid, hence option A is correct.
What is an ecological pyramid?The ecological pyramid is the diagram that states the amount of energy within each tropic level of the ecosystem in a food chain and food web.
It defines as the interaction of the energy between the organism and the presence of the energy and matter within them. At the base of this pyramid producer is placed and at the top of the pyramid tertiary consumer is placed.
The energy flow follows the 10% rule through which energy is get reduced by 10 at each tropic level from the Sun to the consumers, if the producer has 10,000 kcal energy, the primary consumer has only 10,00 kcal energy.
Therefore, an ecological pyramid is a diagram that shows the energy.
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PLS HELP15. Scientists use a system called binomial nomenclature to classify organisms. For example, the
goldfish is known as Carassius auratus. Each of the two names has a different significance.
Which of the following correctly describes the meaning of the two names?
A. Carassius is a distant evolutionary ancestor of the goldfish, while auratus is a more recent
species.
B. Carassius is a group of organisms with similar behavior, while auratus is a group with
similar structures
C. Carassius is a group of organisms with similar external structures, while auratus is a group
with similar internal structures,
D. Carassius is a group of different organisms with similar structures, while auratus is a
smaller group of members that can only breed with another auratus,
Answer:
The correct answer is: d. Carassius is a group of different organisms with similar structures, while auratus is a smaller group of members that can only breed with another auratus.
Explanation:
Carassius signifies the name of genus. In binomial terminology it is the generic name shared by the collection of nearby families. In this case, Carassius is a genus in the family of ray-finned fishes. Auratus signifies the types of the fish and it is detailed exclusive epithet within the type. Carassius is a type in the ray-finned fish family Cyprinidae. Maximum types in this genus are usually identified as crucian carps, however this tenure often precisely denotes to C. carassius. The most well known is the goldfish (C. auratus).
The process of plant respiration
A.
uses all the energy released during photosynthesis.
B.
releases energy that plants can use for life processes.
C.
releases oxygen to Earth's atmosphere.
D.
produces food that plants need for photosynthesis.
Answer:
C
Explanation:
Answer:
B
releases energy that plants can use for life processes.
Explanation:
it is correct on study island
Before the three-dimensional structure of DNA was discovered, scientists knew that DNA contained nitrogenous bases. The table below shows the percentages of the nitrogenous bases in a DNA sample. Which rule can be used to determine the percentages of the missing nitrogenous bases? Complete the table AND explain your answer.
Before the three-dimensional structure of DNA was discovered, scientists knew that DNA contained nitrogenous bases. The table below shows the percentages of the nitrogenous bases in a DNA sample. Which rule can be used to determine the percentages of the missing nitrogenous bases? Complete the table AND explain your answer.
Base Percent Adenine 23 Thymine ___ Cytosine 27 Guanine ____
Answer:Chargaaf's rule can be used to find out missing percentages. Thymine will be 23% and Guanine will be 27%.
Explanation:Chargaaf was a very popular scientist who worked on the DNA even before Watson and Creek discovered the DNA structure. Its even very evident that because of Chargaaf's rules, Watson and Creek were able to formulate their structure of DNA.
One of the rules of Chargaaf said that the ratio of purines to pyrimidines in a DNA is always 1:1. That means the summation of adenine and guanine is to thymine and cytosine will be 1:1. This is actually because adenine is complementary to thymine and guanine to cytosine.
Thus in the given DNA chart, adenine is 23%. So, thymine will also be 23%. Its given that cytosine is 27%. So, guanine will also be 27%. The answer can be checked as the summation of all the numbers give a total of 100%.
I posted this once here it is again please help this is very very very very very urgent!!??!!??
Please respond fast in less than 5 minutes!!!
Help!!! read it ok please help !!!! sorry!!!!
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Me!!!
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Answer:the first on is a convergent boundary and the second also looks like a convergent boundary
Explanation:
Can DNA be replicated while the DNA is twisted in its double helix?
Answer:
The double-helix shape allows for DNA replication and protein synthesis to occur. In these processes, the twisted DNA unwinds and opens to allow a copy of the DNA to be made. In DNA replication, the double helix unwinds and each separated strand is used to synthesize a new strand.
Explanation:
HELP MEEEEE it’s due today
Answer
During osmosis, solvent particles move from an area of higher concentration to an area of lower concentration. When there is higher concentration of solvent particles inside the cell, most solvent particles will move out of the cell and the cell will shrink. When there is higher concentration of solvent particles outside the cell, most solvent particles will move in the cell and the cell will become turgid.
Explanation:
Osmosis can be described as the process by which water molecules move along a concentration gradient form an area of higher concentration to an area of lower concentration. When water molecules move out of the cell, the cell will shrink. When the water molecules move inside the cell, the cell will gown and become turgid. Osmosis is a kind of passive transport.
A student wants to compare the amounts of CO2 given off by yeast provided
with different amounts of sugar. The student places a balloon over each
container to catch the released CO2. How can the student make quantitative
observations of the CO2 collected in the balloons?
D
Final answer:
To quantitatively observe [tex]CO_2[/tex] collected in balloons, the student can measure the balloon circumference, use a gas pressure sensor, employ a water displacement technique, or weigh the setup to determine mass loss due to gas production.
Explanation:
To make quantitative observations of the [tex]CO_2[/tex] collected in the balloons in an experiment where yeast is provided with different amounts of sugar, the student could use several methods:
Measure the circumference or diameter of the balloon. As more [tex]CO_2[/tex] is produced, the balloon will inflate, and this can be quantified.Use a gas pressure sensor to measure the pressure inside the balloon. This will give a direct measurement of the amount of gas produced.Employ a water displacement method, where the balloon is connected to an inverted measuring cylinder submerged in water, and the amount of water displaced is equivalent to the volume of [tex]CO_2[/tex] produced.Alternatively, after the reaction, weigh the entire setup and calculate the mass loss, which will correlate to the amount of [tex]CO_2[/tex] generated.Remember that the student should ensure that other variables are controlled so that differences in [tex]CO_2[/tex] production are due to the amount of sugar provided and not other factors.
What is the theory of plate tectonics? Explain this scientific theory, making sure to include the following terms in your response: Pangaea, continental drift, convection, gravity. Use 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words.
Answer:
Plate tectonics is a scientific theory that explains how seven continents are formed. Around 240 million years ago, all these continents were together in the form of a super-continent (called as pangaea). However, due to convection (circular motion of molten material inside Earth) and gravity, supercontinent started breaking apart. These parts started moving away from each other leading to the continental drift.
What is the relationship between Temperature in urchin survival
Sea urchin embryo requires temperature of 23 degrees to cleave, in lower temperatures the embryo cleavage slows down.
Explanation:
Although the sea urchins live in sea water in cold temperature, they require a temperature of around 23 degrees to cleave for fertilisation if this temperature is reduced the process of cleavage slows down eventually depleting the urchin population.
Temperature affects urchin survival through its influence on metabolic processes and how body size affects heat retention and loss. They must inhabit an environment that maintains their body within a temperature range supporting their metabolism.
Explanation:The relationship between temperature and urchin survival relates closely to the physiology of the urchins and the role temperature plays in their metabolic processes. Temperature exerts an important influence on living things, including urchins, because from a metabolic standpoint, few organisms can survive at extreme temperatures. Enzymes within these organisms, crucial for metabolic processes, operate efficiently within a specifically narrow temperature range and can degrade at higher temperatures. More geographically, temperature also varies by latitude and body size also plays a key role in urchins as it affects heat retention and loss. Smaller organisms often lose heat at a faster rate because they have a greater surface area relative to their mass.
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Question 7 of 10
2 Points
Which of these makes surface mining less risky than underground mining?
O
A. Tunnels in surface mines can collapse and trap miners.
B. Surface miners work aboveground in the open air.
O
C. Open pits at surface mines replace biological communities.
O
D. Surface miners work in dusty, enclosed areas.
SUBMIT
Underground mining is cost effective and consumes more time and energy than surface mining for mining coal from the underground.
Destruction and damages of land surfaces are caused due to underground mining that changes the form and topography of the land.
More possibilities for fatal accidents, flooding from groundwater or sea water, methane gas explosions, failure of air ventilation machines are there in underground mining, compared to Surface mining.
Underground mining requires proper ventilation and insecure to workers than surface mining.
Answer:
Surface miners work aboveground in the open air.
Explanation:
Help pls Farming is one example of a human activity that has changed the environment.
Which is the NOT a reason farming has hurt the environment?
It uses large amounts of fresh water
It increased the availability of food for humans
It destroys habitats of many soecies
It contributes to soil erosion and desert formation
Farming increased the availability of food for humans is NOT a reason farming has hurt the environment.
Explanation:
Farming requires the tillage of land and therefore loosens the soil such that it is easily carried by agents of soil erosion – like wind and water.
In addition, most farming methods practice monoculture hence reducing the biodiversity of ecosystems in the region. Poor biodiversity leads to loss of species and low capacity to adapt to environmental changes/.
Farming also requires water to water the plants. This water is usually sourced from freshwater bodies like rivers and lakes. Often, this water is overdrawn leading to depletion of water to the environment denying other species their share of water.
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Question 15 (1 point)
Theme: Life depends on interactions within and between systems.
Emergent properties are the result of interactions between the components of a
system. Systems biology models the complex behavior of biological systems. A heart,
arteries, and veins by themselves can't do anything, but if they are assembled in a
body, they can pump blood. What does this illustrate?
a) Evolution by natural selection
b) An emergent property
c) The one-way flow of energy in ecosystems
d) The universal genetic code of life
The given scenario illustrates An emergent property.
Explanation:
A property that explains about the functioning of any system as a whole is an emergent property. The units of that individual system will not work to give the functionality of the entire system. Fallacy of division occurs when there is a failure in the realization of this emergent property.
For instance let us take an ant colony. Ant as a single organism will not be able to attain certain works. While when they join to form a colony they together can accomplish complex and tedious tasks. Hence, in human body also cells of heart acts as an example of an emergent property as they together can accomplish the function.
Through which microscope were cells first observed.
Answer:
Through "Compound microscope" cells were first observed.
Explanation:
Robert Hooke used compound microscope to detect the cork cell which laid to the basis for detection of the cell in 1665. The microscope was planned by him to detect a part of cork where he visualized tiny elements fixed combinedly and he called those elements as “cell”. He didn’t realize a little organelles within the cell as he detected the lifeless plant cell with cell walls which look like minor chamber. The compound microscope is used to assess the magnified pictures of the model existing in the glass slide and the magnification power used by Robert Hooke is 50X. The tests and explanations ended using numerous lenses were logged in his book called "Micrographia" or some Physiological Descriptions of Minute Bodies completed by Magnifying Glasses with Explanations and Inquiries Thereupon. "The cell is the structural and functional unit of an organism where plants and animal cells contain different cellular organelles with specific function."
Compound microscope was first used to observe cells.
Explanation:
In 1965, Robert Hooke observed a slice of cork under a compound microscope and saw the compartments in it. He named these compartments as cell.
The compound microscope has a high magnification power. It uses two convex lenses of short focal length. These lenses are objective lenses and eyepiece. It has resolution of 10X, 40X to obtain a magnified image of tiny entities like cell.
which disorder is.m created as a result of the final chromosomal change that is shown?
Answer:Down syndrome
Explanation:
Numerical disorders occur when there is a change in the number of chromosomes (more or fewer than 46). Examples of numerical disorders include trisomy, monosomy and triploidy. Probably one of the most well-known numerical disorders is Down syndrome (trisomy 21)
The table shows the changes in velocity for several different cars. Each change takes place over a 10-second interval. Which cars are either
speeding up or slowing down?
Starting Velocity
Ending Velocity
30 km/h
mo
20 km/h
30 km/h
0 km/h
O km/h
30 km/h
The table shows the changes in velocity for several different cars. Each change takes place over a 10-second interval. Which cars are either
speeding up or slowing down?
Starting Velocity
Ending Velocity
Car A
30 km/h
30 km/h
Car B
O km/h
20 km/h
Car C
30 km/h
O km/h
Car D
O km/h
O km/h
Car E
20 km/h
30 km/h.
Answer:Acceleration is present in car B and E.
Deceleration is present in car C.
No change in velocity is seen in car A and D.
Explanation:Acceleration is defined as the rate of change of velocity with time and is having a dimensional formula of [tex]distance /time ^2[/tex]
When a body is having acceleration, the body has more final velocity than initial velocity. Deceleration is the opposite of acceleration which is seen when the body has less final velocity than initial velocity.
In A:
Initial velocity= 30 km/hr.
Final velocity= 30 km/hr.
So change in velocity = 30-30 km/hr = 0 km/hr.
So no acceleration is present.
In B:
Initial velocity= 0 km/hr.
Final velocity= 20 km/hr.
So change in velocity = 20-0 km/hr = 20 km/hr.
So acceleration is present.
In C:
Initial velocity= 20 km/hr.
Final velocity= 0 km/hr.
So change in velocity = 0-20 km/hr = -20 km/hr.
So deceleration is present.
In D:
Initial velocity= 0 km/hr.
Final velocity= 0 km/hr.
So change in velocity = 0-0 km/hr = 0 km/hr.
So no acceleration is present.
In E:
Initial velocity= 20 km/hr.
Final velocity= 30 km/hr.
So change in velocity = 30-20 km/hr = 10 km/hr.
So acceleration is present.
Answer:
B, C, E are the right answers
Explanation:
I got this question on a test and got these as the right answers
PLEASE HELP!!!!
Modeling the Calvin Cycle Exploration
1. Glucose, a six-carbon chain, results from the output of the Calvin cycle. Did your exercise generate a glucose molecule?
2. When is glucose generated?
3. What is the chemical formula for photosynthesis?
4. Did the complete process of photosynthesis take place in the way you modeled it in this activity? Explain your answer.
Answer: 1) The answer is no, because we don't create energy, 2) In plants, it's produced in the chloroplasts of plant leaves during the chemical process photosynthesis., 3) 6CO2 + 6H2O → C6H12O6 + 6O2., 4) I don't know
Explanation: For answers one and four it's easier with a picture of the experiment you did, so they may not be right.
Which is one of the bases found in DNA?
O
A. Adenine
O
B. Serine
O
c. Huanine
O
D. Polymine
Final answer:
Adenine is one of the bases found in DNA, pairing with thymine to form part of the DNA structure through hydrogen bonding.
Explanation:
One of the bases found in DNA is adenine (A). Adenine is one of the four nitrogenous bases in DNA, along with thymine (T), cytosine (C), and guanine (G). These bases pair up to form the rungs of the DNA ladder, with adenine pairing specifically with thymine through hydrogen bonds. The structure of DNA is stabilized by these complementary base pairings, and any change in these pairings, such as an adenine replacing a cytosine, could potentially alter the DNA structure and thus the genetic information it carries. In the context of nucleic acids, these bases are attached to a deoxyribose sugar and a phosphate group to form a nucleotide.
The skin MAINLY protects the body against infection by
Question 21 options:
producing antibodies.
serving as a barrier.
stimulating mast cells.
secreting sweat.
I need help now ill do brainiest or anything please
Answer:
serving as a barrier.
Explanation:
what are two characteristics of all animals?
Answer:
Multicellular or unicellular.
Explanation:
Some animals can be multicellular or unicellular. some animals are made up if cells that do not have cell walls too.
Answer:
All animals are multicellular organisms.
All animals are heterotrophic.
Explanation:
All animals are multicellular because their bodies are made up of more than one cell.
All animals are heterotrophic because they get food and energy by consuming plants and animals.
PLEASE HELP
From your knowledge about the distribution of electrons in their shells and from the atomic number (in parentheses), indicate the most likely charge on the ion when this atom forms an ion. (Remember the 2-8-18 shell distribution.)
Oxygen (8)
+1
+2
-2
-1
Answer:
The correct option is -2.
Explanation:
Oxygen atom will have two electrons in its first shell and six electrons in its outermost, valence shell. To become stable, an oxygen atom will need to gain two electrons so that it has 8 electrons in its outermost, valence shell. When oxygen will gain two electrons from another atom, it will get a charge of -2. This is because it has acquired two more negative charged electrons. Hence, the correct option is -2.
Answer:
-2
Explanation:
Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of
a scientific theory? Do you think it should be a scientific law? Explain your response.
Answer:
The correct answer is "yes it satisfies the definition of the scientific law"
Explanation:
The scientific theory states the verified explanation of the natural world. This things or the experiments can be determined by repeatedly testing by the given scientific methods. The cell theory also meets the definition of the very known scientific theory as it has also helped in determining it by various experiments as well as the observations. The cell can be studied under the microscope by the basic staining procedures that has already been mentioned in the theory.
Answer:
Cell theory meets the definition of a theory because it has been tested over a long period of time, and scientists have plenty of evidence to support this theory. However, it doesn’t seem to meet the criterion of a scientific law. Scientists only know about life on this planet, so the theory may not be universal if life is found on other planets. In addition, scientists don’t have much data on the earliest forms of life on Earth.
Explanation:
describe how gametogenesis in egg cells is different that that of sperm cells
Answer:
Gametogenesis is the process where a haploid cell is formed from diploid cell. Gametogenesis in male is called Spermatogenesis and gametogenesis in female is called as Oogenesis
Explanation:
⇒The process through which mature sperm or spermatozoa is produced is called as Spermatogenesis and the process through which mature ova or egg is formed is called as Oogenesis.
⇒Spermatogenesis takes approximately 70 days whereas Oogenesis begins prior to birth that is during the foetus period.
⇒Spermatogenesis contain different stages like- Primay spermatocyte, secondary spermatocyte, spermatid and spermatozoa whereas, Oogenesis contain Primary oocyte, Secondary oocyte &first polar body, mature ovum and second polar body.
What does an antibiotic do exactly
Answer:
antibiotics tend to reduce/stop pain for a while but the bacteria/ virus may eventually be resistant to it
Explanation:
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