the fact that individuals who possess favorable traits are more likely to survive and reproduce than those who possess less favorable traits is the basis for natural selection.

Most of the energy utilized for metabolism is initially obtained from light by Photoautotrophic organisms.

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When natural resources, both renewable and non-renewable, are used up more quickly than they can replenish, resource depletion occurs.

In terms of natural resource accounting, depletion refers to the portion of harvest, logging, catch, and other activities that exceed the stock's sustainable level; for non-renewable resources, it refers to the volume of resources removed.

When natural resources, both renewable and non-renewable, are used up more quickly than they can replenish, resource depletion occurs. The phrase "resource depletion" is frequently linked to the use of water, fossil fuels, trees, and fisheries.

Natural resources including water, fuel, air, and soil are depleted, which results in competition between living things for the remaining sections and lowers the quality of the resources that are still available. The quality of some human activities has an impact on drinking water.

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Answer:

Digestive System

Small intestine

epithelial tissue

Animal cell

Carbohydrate

Carbon atom

Explanation:

Answer:

Gluconeogenesis and glycogenolysis

Answer:

By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells

Robert Hooke: (1663-1665)- The cell was discovered by Robert Hooke in 1665. He examined very thin slices of cork and saw many tiny pores. However, Hooke did not know their real structure or function.

Anton Van Leeuwenhoek: (1674-1683)- Leeuwenhoek made a microscope of glasses used by drapers by polishing tiny lenses of great curvature which gave magnifications up to 270× diameters, the finest known at that time.Leeuwenhoek was the first to see and describe bacteria(1674), yeast plants, the life present in a drop of water, etc.

Theodor Schwann(German zoologist):(1837-1839)- Matthias Schleiden found that all plants are composed of cells, and shared the finding with Schwann, who had found similar structures in the cells. Other researchers confirmed the similarity, after which he concluded, "All living things are composed of cells and cell products". This became the cell theory.

Matthias Schleiden(German botanist):(1839)- He stated that different parts of the plant organism are composed of cells. He also recognized the importance of the cell nucleus and told about its connection with cell division.

Rudolf Virchow:(1855)- Rudolf Virchow suggested that all cells come from pre-existing cells. His aphorism 'Omnis cellula e cellula' means every cell originates from pre-existing cell became the foundation of division, even if the process was not fully understood then.

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The statement that is not a function of phosphorus in living organisms is option  C: It is used in the digestion of nitrates.

A lot of plants and animals require phosphorus as a nutrient. It is an essential component of molecules that store energy like ATP, DNA, and lipids and plays a significant role in cell development (fats and oils). Crop yields may decline as a result of low soil phosphorus levels.

Therefore, Phosphorus is mostly used in the development of bones and teeth. It has a significant impact on how the body utilizes fats and carbs. The production of protein by the body is also necessary for the development, upkeep, and healing of cells and tissues.

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When similar characteristics are similar due to the existence of shared ancestry, this is called as homology.

In the field of evolution, homology can be described as the existence of similar characteristics in organisms that are not similar due to their shared ancestry. Although these organisms might be completely different from each other now but a common characteristic arises in between them due to a common ancestor.

For example, the limbs of a bat and a human are homologous to each other because they are made of the same bone structure which was present in a common ancestor in between them.

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As part of the new green initiative, recycling copper from waste streams would be most efficient in reducing the amount of copper mined each year.

Copper mining can be sustained through the adoption of greener ways to minimize the harmful effects of mining. Eco-friendly equipment such as solar powered tools can be introduced to reduce carbon emissions and improve energy efficiency.

Other ways include recycling copper from waste streams to reduce the amount mined each year, cleaning out waste and using lower impact mining techniques to improve the environment.

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The cause of lactic acid build-up in our muscles is a lack of oxygen to metabolize or break down glucose. When anaerobic respiration takes place, the ph of the blood decreases. The substance found in the blood when anaerobic respiration takes place is lactic acid. When lactic acid fermentation occurs, lactic acid gets deposited into the blood, which leads to an increase in blood acidity and reduction of blood ph. Alchoholic fermentation doesn't occur in humans but is a form of anaerobic respiration that occurs in yeasts. The form of respiration that involves oxygen and carbon dioxide is aerobic respiration.

Our body derives energy by metabolizing glucose in the presence of oxygen in the cytosol and mitochondria of the cell. This form of respiration is called aerobic respiration. However, when oxygen is absent, the body undergoes anaerobic respiration in the form of lactic acid fermentation.

Lactic acid fermentation mainly occurs in muscle cells. Here, one glucose molecule is broken down to produce two molecules of lactic acid and energy. The body cannot further metabolise lactic acid, hence, it builds up in the muscle cells and the blood. The blood is normally slightly alkaline, but when it contains excess lactic acid, it becomes more acidic, leading to a medical condition called lactic acidosis.

Alchoholic fermentation doesn't occur in humans. It occurs in yeasts and some other bacteria. Carbohydrates are broken down by various enzymes to produce energy, alchohol and carbon dioxide.

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When R is doubled, the charge will become 4 times the origInal charge.

The quantity of electric charge that may be stored for every unit change in electric potential is known as capacitance. When two parallel plates are placed over a battery and separated by a certain distance, the given plates begin to charge progressively, and an electric field is created between them.

Q = CV

Q is the charge

C is capacitance

V is voltage passed

C= (Aϵ0)/d

A is the area of the plate

d is distance between the plates

Since its a circular disc, A = πR^2

R is the radius of the plate

C= ((πR^2)ϵ0)/d

When R is doubled it becomes 2R

C= ((π(2R)^2)ϵ0)/d

C= ((π4R^2)ϵ0)/d

C= 4(((πR^2)ϵ0)/d)

Recall that

((πR^2)ϵ0)/d = C

Therefore, the new

C = 4C

Q = CV

When C = 4C

Q = 4CV

Put Q = CV

Q = 4Q

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The force man is applying to push a van of 2000kg and acceleration of 0.05m/s/s is 100 N.

Force can move  a body that is at rest and can also stop a moving body or slow it down. It can accelerate the speed of a moving body and can change the direction along with its shape and size of a moving body

The force is defined by Newton's second law of motion:

Force exerted by an object is equal to mass multiplied by acceleration

F = m ⨉ a.

SI units are Newtons for force, kilograms for mass, and meters per second squared for acceleration. A force can change velocity of the object with mass. It is a vector quantity as it has both magnitude and direction.

Given mass is 2000 kg and acceleration 0.05 m/s/s,

we can find force using formula:

F= m * a

   =  2000 * 0.05

Force = 100 N

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d) Acetylcholine is released from the end of the motor neuron. It is the first event in muscle fiber contraction. This happens when muscle fibers get a signal from the brain through nerves to initiate the tension inside the muscle.

Muscle contraction starts once the sensory system produces a signal. This signal or impulse is generally called an action potential. It travels through a kind of nerve cell called a motor neuron. The neuromuscular junction is where the motor neuron arrives at a muscle cell. Skeletal muscle tissue is made out of cells called muscle strands. At the point when the sensory system signal arrives at the neuromuscular junction, a chemical message is delivered by the motor neuron.

A neurotransmitter called acetylcholine which acts as a chemical message binds to receptors outside of the muscle fiber. This is how this chemical reaction in muscle begins. This ultimately starts a multi-step molecular level cycle within the muscle fiber, once acetylcholine binds to receptors on the muscle fiber membrane.

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1) blue line: by the year 3000 the population will not have reached its carrying capacity. Orange line: by the year 3000 the population will reach its carrying capacity (K=11 billion individuals). Green line: by the year 2500 human population will reach its carrying capacity (K = 8 billion individuals). 2) water, food, and space availability. Natural disasters and uncontrolled human activities. 3) if we do reach carrying capacity we will keep growing in size until N>K, and then decrease.

Carrying capacity (K) refers to the maximum point at which the environment can support a growing population.

K is a constant. It coincides with the population size when the natality rate and mortality rate are equal to each other. This is the equilibrium point.

So when the population size exceeds K, carrying capacity makes the population decrease in size. This is because there are not enough resources for this population to survive.

The carrying capacity might be affected by different factors, known as limiting factors, which might be a result of the population density (for example, competition, predation, parasitism) or might be density-independent (human impact or natural disasters).

In the exposed graph,

1) Do you think Earth's population will reach carrying capacity?

It depends on the line we analyze,

It represents the highest predicted population growth.

There is no explicit carrying capacity point in this line since the curve has not reached a plane yet.

It seems that, by the year 3000, the human population will still be growing.

It represents the medium-predicted population growth.

The carrying capacity point seems around 11 billion individuals, which is where the curve has reached its plane.

This graph represents that by the year 3000, the human population will have reached its carrying capacity, and it will be in equilibrium.

It represents the lowest predicted population growth.

The carrying capacity point seems slightly higher than 8 billion individuals, which is where the curve has reached its plane.

This graph represents that by the year 2500, the human population will have reached its carrying capacity (8 billion individuals), and after that year it will decrease. By the year 3000 there might be around 7 billion individuals.

2) What might be some limiting factors?

Limiting factors:

3) What do you think will happen if we do reach carrying capacity?

When the human population reaches its carrying capacity, I believe there will be no control on population growth and resource use, so it will keep growing until N > K, and then it will need to obligatory decrease in size.

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0.49 is the frequency of individuals that are homozygous for the dominant allele.

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Once proteins have been produced by the ribosomes they are sent to the Golgi Apparatus where they can be adjusted, packaged, and shipped to other parts of the cell. An example would be the Endoplasmic Reticulum which carries digestive enzymes around the cell.

To assist in the large amounts of protein, the Rough Endoplasmic Reticulum is covered with many Ribosomes many of which can be found floating freely in the Cytoplasm.

The above speaks to the process of protein synthesis in the mammalian cell.

Ribosomes that are free or unattached float in the cell's interstitial fluid, or cytoplasm. Except for the nucleus and other organelles, they are free to roam about. The proteins produced by the detachable ribosomes are released straight into the cytoplasm for utilization by the cell.

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Adhesive force is the force of attraction that exists between the molecules of two different substances. This force helps to bind the two objects together.

3 everyday examples of adhesive properties of water:-

Painting: Applying a coat of paint on the walls or any furniture is the perfect example of adhesive force in action.

Wet Surface: When water falls on any surface, it spreads out thoroughly. This spreading of water causes an intermolecular attraction to get developed between the water molecules and the surface molecules.

Capillary Action: If you place a thin straw in a glass of water, the water will be attracted to it. If the adhesive attraction between the water and straw is stronger than the water's cohesive attraction with itself, water will move up the straw unassisted. This is how plants bring water from the soil up into their leaves.

Cohesion on the other hand is the intermolecular (between-molecules) attraction between molecules of the same type, which in this case is the attraction between molecules of water.

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The number of half lives that have passed is obtained from the question is 3 half lives.

We know that many times, the scientist is faced with the issue of trying to date a material. This is because, we often need to know the exact period in which the material may be rightly said to belong. This have helped us to decode the age of so many materials that we have in the world today.

The half life is the time that it takes for only half of the radioactive materials to remain in a sample. We have been told that Potassium-40 decays into Argon-40, known as K-Ar dating. Potassium-40 has a half-life of 1.25 billion years. The task that we now have is to be able to Identify the number of half-lives passed after 3.75 billion years.

We can now say that the number of the half lives is;

3.75 * 10^6 years/ 1.25 *  10^6 years

= 3 half lives

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This is an example of base substitution mutation.

Single base substitutions are called point mutations. Point mutations that occur in DNA sequences encoding proteins are either silent, missense or nonsense. In the case of the DNA given in the question, it is noticed the complementary strand differs from the parent strand at the fourth base position: here, the adenine triphosphate is replaced with guanosine triphosphate in the complementary strand.

Furthermore, it is a transition type of point mutation because adenine and guanine are both purines. Transition point mutation is the substitution of either a purine for a purine or a pyrimidine for a pyrimidine.

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Answer: In metaphase of meiosis the homologous pairs of chromosomes line up on the metaphase plate, near the center of the cell. This step is referred to as a reductional division. The homologous chromosomes that contain the two different alleles for each gene are lined up to be separated.

Explanation: Don't know if it helps

The prediction is that cell will produce some ATP but in much lower amounts than if oxygen was present if oxygen was removed from the muscle cell.

This is referred to as the process in which an organism obtains energy which is usually in the form of ATP by combining oxygen and glucose, resulting in the release of carbon dioxide and water and is a vital metabolic process in the body.

Photosynthesis on the other hand is referred to as the process in which plants manufacture their food in the presence of sunlight and some compound such as water etc.

Since oxygen is vital in the production of energy then it therefore means that if oxygen was removed from the muscle cell then there will be a lower amount of ATP (energy) produced thereby making it the correct choice.

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The other part of the question is:

In one simulation, they are asked to change the initial concentrations of several gases, one at a time, to see the impact on ATP production in a muscle cell. If the students begin by removing oxygen from the muscle cell, what should they predict will occur?

Cell theory supports that all organisms are made up of cells. The following statements support the cell theory: Development of Microscope, Schledian's observation of plant cells in various samples of the plant tissue, cells were found in animal tissues, and one-celled organisms reproduce by binary fission. Thus, the correct options are 1, 2, 3, and 5.

Cell theory is a scientific theory which was first introduced in the mid-nineteenth century. The theory states that living organisms are made up of cells which are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.

The unified 3 main cell theories are as follows:

1. All living things are composed of one or more cells;

2. The cell is the basic unit of life;

3. New cells arise from existing cells.

Therefore, the correct options are 1, 2, 3, and 5.

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         The variety of animals, plants, fungi, and even microorganisms like bacteria that make up our natural environment are all included in what is known as biodiversity. These various species and critters collaborate in complicated web-like ecosystems to keep things in balance and support life.

      In order to make communities more resilient and less vulnerable to shocks like climate change and natural catastrophes, biodiversity is crucial. Ecosystems with the ability to control climate and reduce floods are unstable as a result of biodiversity loss.

          The term "biodiversity" describes the range of plant and animal species that are found in a given location. It can be divided into the three categories below: Genetic variety is the variation found within species. Species diversity refers to the variety among species. Ecosystem diversity refers to the variety among ecosystems.

       Land use change (mainly for large-scale food production), which is responsible for 30% of the global biodiversity decline, is the primary direct cause of biodiversity loss. The second major factor, accounting for 20%, is overexploitation (overfishing, overhunting, and overharvesting) for goods including food, medicine, and timber.

         There are five main risks to biodiversity, according to the UN's Convention on Biological Diversity. Changes in land and sea use, direct exploitation of natural resources, climate change, pollution, and invasive species are listed here in decreasing order.

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On a crime scene, even the smallest speck of blood, hair, or other organic matter from the culprit’s body is left. Then the DNA in this material can be amplified by using the PCR technique.

PCR stands for Polymerase chain reaction. This is a method used widely to make many copies of a specific DNA sample. This allows scientists to amplify a very small sample of DNA millions to billions of times and then they can match the DNA profile of the sample to that of the criminal.

Thus, PCR is an essential technique used by forensics to identify the preparator of the crime.

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Positive effects of humans on the environment are possible. Humans can affect ecosystems in numerous ways, whether at the individual, communal, organizational, or governmental levels.

An ecosystem is a region where a bubble of life is created by plants, animals, and other organisms interact with the weather, landscape, and other factors. Abiotic variables, or nonliving elements, coexist with biotic components in ecosystems. Biotic components include plants, animals, and other species.

Agroecosystems, aquatic ecosystems, reefs, deserts, forests, human ecosystems, littoral zones, ocean life, prairies, rainforests, savannas, steppes, taiga, tundra, urban ecosystems, and others are some examples of ecosystems.

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The stratosphere warms up as it ascends because it lacks turbulence and Due to variations in solar UV light the thermosphere behaves differently.

In contrast to the troposphere, the stratosphere actually warms up as it ascends! The stratosphere's air lacks the turbulence and updrafts that characterize the troposphere below due to the trend of rising temperatures with altitude.

The very significant ozone layer is found in the stratosphere. The ozone layer aids in shielding us from the sun's ultraviolet (UV) rays. In actuality, the ozone layer filters out the majority of the UV rays the sun emits at us.

Without this layer of defense, there would be no such thing as life as we know it.

The thermosphere is the portion of the atmosphere between 85 and 500 km altitude that contains the ionosphere.

Due to variations in solar UV light and solar-driven geomagnetic activity, it exhibits high temperatures and significant fluctuation.

The thermosphere exactly refers to the layer of very extremely rare air that is present above the mesosphere.

The thermosphere becomes heated to hundreds or even thousands of degrees by the Sun's high-energy X-rays and UV radiation. However, because of how thin the air is, we would experience extreme cold in this stratum.

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The answer is option A: The model shows a single wave travelling away from a source.

This wave is also called a transverse wave.

A transverse wave in physics is one whose oscillations are parallel to the wave's advance direction. Comparatively, a longitudinal wave moves in the direction of its oscillations.

Find an image attached as the question is incomplete without the diagram.

How does an electromagnetic wave transmit energy?

Electrical and magnetic field vibrations are used to transport energy in electromagnetic waves. The vibration of air molecules or the particles of a substance that the sound is traveling through is how energy is conveyed in sound waves. The vibration of the water molecules occurs in water waves, which allows energy to be transferred.

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Answer:

true

Explanation:

A molecule of oxygen needs to cross three (3) phospholipid bilayers when moving from outside of a eukaryotic cell to eventually be reduced by complex iv of the electron transport chain.

Cellular respiration is a cellular process that involves oxide reduction reactions of oxygen molecules, which occur inside the mitochondria, a type of cell organelle that has two membranes.

Therefore, we can conclude that a molecule of oxygen needs to cross 3 phospholipid bilayers during the electron transport chain, which are represented by the cell membrane and external and internal membranes of the mitochondria.

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Answer:

the salt water causes harm to your cells and can cause dehydration

Explanation: