13. Which organelle contains genetic information and controls most cell activities?
a. Nucleus
b.) Cell membrane
C. Vacuole
d. Endoplasmic reticulum
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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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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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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 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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Answer:

true

Explanation:

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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Answer:

Gluconeogenesis and glycogenolysis

Answer:

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

Explanation:

Explanation:

An endothermic reaction is a chemical reaction that absorbs (or use) energy overall.

An exothermic reaction is a chemical reaction that releases energy by light or heat.

Explanation:

i hope this will help you mark me brainlist

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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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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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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         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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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

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

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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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'Along with major storms, humans (biosphere) constructed a dam out of rock materials' (lithosphere). The lake's water (hydrosphere) seeps into the cliff walls behind the dam, eventually becoming groundwater (lithosphere) or evaporating into the atmosphere (atmosphere).

Hence, 'Along with major storms, humans (biosphere) constructed a dam out of rock materials' (lithosphere).

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Answer:

What are multiple alleles? In biology, multiple alleles are three or more alleles for a particular gene. Multiple allelism (biology definition): The condition of the presence of multiple alleles. An example of multiple alleles is the ABO blood group system in humans.

Certain species of Lactobacillus ferment glucose into mainly lactic acid in a process termed homolactic fermentation, while other species of Lactobacillus ferment a mixture including lactic acid, acetic acid and carbon dioxide in a process termed heterolactic fermentation.

Through the activity of enzymes, the metabolic process of fermentation causes chemical changes in organic substrates. In biochemistry, fermentation is specifically described as the process of obtaining energy from carbohydrates without the presence of oxygen. In the context of food production, the term may be used more broadly to describe any procedure in which the action of microbes results in a desired modification to a food or beverage. Zymology is the field that studies fermentation.

By anaerobically degrading organic resources, fermentation is the main mechanism by which microbes produce adenosine triphosphate (ATP).

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It appears to be in charge of many of the processes that support creative thinking, the frontal cortex has been referred to as the hub or center of creativity.

The brain is a complex organ that manages every bodily function as well as thought, memory, emotions, touch, motor skills, vision, breathing, temperature, and hunger. The central nervous system or CNS, is made up of the spinal cord that emerges from the brain.

Billions of nerve cells in your brain are organised in patterns that help you think, feel, act, move, and sense things. Your brain and the rest of your body are connected by a vast system of nerves that allow for rapid communication.

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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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Four classes of organic compounds containing carbon are carbohydrates, proteins, lipids, and nucleic acids. The carbon cycle involves photosynthesis which gives proteins to plants and animals. plants get their carbon from the air and their nitrogen from the soil.

Every living thing contains organic molecules like lipids, proteins, carbohydrates, and nucleic acids. Large carbon-based structures make up these macromolecules.

Carbon is shared between living things and their environment during the carbon cycle. It describes how carbon moves when it is recycled and used again. Since carbon is the primary component of biological compounds, it is crucial for photosynthetic organisms to absorb carbon dioxide (CO₂) from the atmosphere, use it to make organic molecules like carbohydrates, lipids, proteins, and nucleic acids, and then release it back into the atmosphere as CO₂ during respiration.

On the other hand, plants cannot absorb nitrogen from the atmosphere in the form of the gas N₂. It is transformed by bacteria into ammonia (NH₃), a type of nitrogen that plants may use, as part of the nitrogen fixation process. Animals ingest useable nitrogen molecules when they consume plants.

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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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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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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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Acetyl call age is the major precursor to all glycerophospholipids.

Glycerophospholipids are detergents and, as such, they reduce water surface tension and stabilize the dispersion of hydrophobic compounds (cholesterol and neutral fats) in aqueous solutions. The capacity of phospholipids to function as detergents is important in bile, where they favor the solubility of cholesterol.

in the given question, this is part of the concept of a cycle basically in biology. So this compound is not considered a precursor for the production of glucose neurogenesis in humans, which is the correct answer, we have the Acetyl Call Age. The reason is that always remember that the gluconate eugenic pathway converts pyre of eight two glucose and non-carbohydrate precursors of glucose are first converted into paraguay or even in the pathway at later intermediates such as axel acetate and the hydro accident phosphate, the main non-carbohydrate precursor, our lactate, we have lock band, we have amino acids and also glycerol. In the human body, glucose cannot be synthesized from fatty acids because they are converted by beta-oxidation to acetyl coenzyme, which then enters the citric acid cycle where it is oxidized to carbon dioxide. The starting materials for glucose neurogenesis. Our three carbon compounds including lactate pyre of it and we also have glycerol and certain amino acids, fatty acids and ketogenic amino acids cannot be used to synthesize glucose. The transition reaction is a one-way reaction, which means that the acid still cannot be converted back to piracy. Consequently, fatty acids cannot be used to synthesize glucose because better oxidation will produce acidic alkalis. Acetylcola is therefore not considered a precursor for the production of glucose.

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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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Answer: photovoltaic devices

Explanation: