Question 4
When a neuron is not processing information:
O It is negatively charged
O It has no charge
O It is positively charged
O It is sometimes positively charged, sometimes negatively charged

Saturated fatty acids press in on one another when temperatures drop, creating a dense, rather hard membrane. Thus, option B is correct.

In weakly or non-polar organic solvents like ether, chloroform, benzene, and acetone, all lipids are insoluble; however, polar organic solvents like water are very soluble.

In fact, the terms “lipid-solvents” and “fat-solvents” are frequently used to describe these four solvents.

Therefore, Unsaturated fatty acids can preserve membrane fluidity by being compressed, which causes the “kinks” in their tails to push apart nearby phospholipid molecules.

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C. ''Photosynthesis uses light energy to convert carbon dioxide and water into glucose and oxygen which is needed for cellular respiration to occur.

Cellular respiration takes the glucose and oxygen and produces water and carbon dioxide that is needed for photosynthesis while also producing energy'' this is the correct answer.

Photosynthesis is a process that occurs in the body of plants in which carbon dioxide and water are converted into oxygen and glucose in the presence of light energy. In this process of photosynthesis, oxygen is released into the atmosphere whereas glucose is stored in different parts of the plant body.

Glucose is used as food by the plant generating energy in the form of ATP and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide with the release of energy. Water and carbon dioxide are the by-products of cellular respiration and ATP is energy that is transformed from the process of cellular respiration.

So we can conclude that option C is the correct answer.

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Drift genetic provides a mechanism for evolution.

Option A is correct.

The variety of known evolutionary change-causing mechanisms has been substantially expanded by genetics. Most of these mechanisms are non-selective or even counter-selective, but they all involve converting variation between individuals into variance across populations over time and place.

The study of evolutionary genetics focuses on how genetics affects the course of evolution. The evolution of genomic structure is being studied in this context. It consists of population genetics and evolution combined. Genome evolution is the process by which the genome's size and structure evolve over time.

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The leaf absorbs less auxin due to its smaller leaf surface area. That is option C.

Auxin is a type of plant hormone that is used to enhance cell elongation, cell division, and cell differentiation in the roots of plants.

The Auxin-based weedkillers are those kind of weedkillers that contains the plant hormone, auxin. This is used for weed control in farm lands because of its ability to selectively destroy dicot weeds that are characterized with broad leaves.

Therefore, only broad-leaved weeds will be killed and not the narrow-leaved wheat in a field spread with the Auxin-based weedkillers.

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                                                         Hello!

                 Analogies are the result of convergent evolution.

                                      What is analogy evolution?

means having similarities in functions but different evolutionary origins.  ( Different species with different evolutionary lines use their biological structures for the same purpose.)

                             which is also called convergent evolution.

Answer:

A)

Explanation:

neurotransmitters have excitatory effects on the neuron. This means they increase the possibility of producing an action potential in the receiving neuron

When excitatory neurotransmitters stimulate a single neuron, the neuron more likely to produce an action potential. Thus option A is correct.

Neurotransmitters are nothing but the endogenous chemicals  released by axon terminals of neurons into the synaptic junctions and its main role is to control the function of the nerve cell.

Some Imbalance of neurotransmitters such as serotonin, norepinephrine and dopamine mainly result in depression.When the level of glutamate neurotransmitter leads to changes in the level of Dopamine cause transition into psychosis.

Different neuro transmitters like enkephalin and serotonin are involved in analgesia system like pain suppression,  When Serotonin are released  causes local cord neurons and both presynaptic and postsynaptic inhibition of pain fibres.

neurotransmitters have excitatory and inhibitory effects on the neuron which means they increase or decrease the possibility of producing an action potential in the receiving neuron

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Answer: Earth’s energy budget describes the balance between the radiant energy that reaches Earth from the sun and the energy that flows from Earth back out to space. Energy from the sun is mostly in the visible portion of the electromagnetic spectrum.

Explanation:

The energy balance between the earth and atmosphere is reached when the energy from the Sun equals the energy that is lost by the Earth back into space. The Earth maintains a steady average temperature and a steady climate in this way.

The balance between the solar energy that enters Earth and the energy that leaves Earth and travels back into space is known as the Earth's energy budget. The visible region of the electromagnetic spectrum is where the majority of the sun's energy is found.

With greenhouse gases in the atmosphere helping to keep the planet habitable, the temperature of the Earth is a delicate balancing act. Multiple mechanisms work together to maintain this temperature balance.

Therefore, The vast majority of the energy that the Earth receives comes from the Sun and is manifested as radiant energy.

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1 . They all contain carbon. Most of them are flammable.

2 . They are all soluble in non-polar solvents. They are mostly, are covalently bonded molecules.

Amino acids and nucleic acids are two examples of biomolecules found inside cells. C, H, O, as well as N make up amino acids and nucleic acids alike.

The basic building elements of the body, amino acid residues, are strung together to form peptides, which are then joined together by acids linked by peptide bonds proteins. The fundamental distinction is that peptides are composed of shorter molecules called amino acids versus proteins.

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The energy transfer that occurred between the lanuch of a rocket and its continuing flight out of the atmosphere is that the chemical energy stored in the fuel of the rocket is transformed into heat energy.

Energy transfer is defined as the process by which a form of energy is being transformed to another form without destruction of the energy.

There are various ways by which energy can be transferred and it includes the following:

When a rocket is being launched, the chemical energy in its fuel would be converted to another form of energy called heat energy through the actions of mechanical and heating processes of the rocket engine.

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The socioeconomic impacts of flooding are decreased purchasing and production power.

This is referred to as the process in which water overflows and submerges the land which is usually dry. It leads to different types of negative consequences such as disruption of the ecosystem etc.

This occurrence leads to the displacement of people from their homes as a result of the place not being conducive enough for living due to the presence of water and other types of organisms in the home and can be prevented by providing appropriate drainage channels.

It leads to erosion in agriculture and the crops are destroyed which will lead to it decreasing production power. The purchasing power is also reduced as it threatens the livelihood of a vast majority of the affected individual.

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Lysosomes carry a variety of acid hydrolases that are active at the acidic pH kept within the lysosome, but not at the neutral pH of the cytosol.

Most of these enzymes are perfectly active only in the acidic lumen of lysosomes. Lysosomal pH is kept at 4.5–5 while cytosolic pH is 7–7.5. This pH difference indicates that proton absorption in lysosomes is almost 1000 times higher than in the cytosol. Lysosomes are hydrolytic enzymes. They need an acidic environment for proper work, they are mention to as acid hydrolases. These enzymes help in the disintegration of polysaccharides, proteins, lipids, nucleic acids, etc. These enzymes vital low pH compared to the cytoplasm to stay active.

So we can conclude that Lysosomes have an acidic interior pH of ~4.8 in contrast to the slightly basic cytosol (pH 7.2).

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While a gram of protein has four calories, the same as a gram of carbohydrates, the body does not readily use protein as a fuel source. Around 5% of the daily energy needs are met by protein on an average day.

Because a large portion of the energy required to build complex organic food molecules like sugars, lipids, and proteins is physically stored inside the chemical bonds that keep them together, these molecules are abundant sources of energy for cells.

In some reactions, energy is absorbed because more energy is needed to break bonds than is created when new bonds are formed.

Therefore, When bonds are broken, energy is absorbed, and when bonds are formed, energy is evolved.

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Pyruvate from glycolysis gets delivered to the mitochondria if oxygen is available. The mitochondrial matrix, which is a region inside the cells, is where the pyruvate is transferred across membranes.

Three compartments are defined by the mitochondria's inner and outer membranes; each has a unique function and associated protein parts. The mitochondrial matrix is the final space, enclosed by the inner membrane.

There are numerous uses for the mitochondrial matrix. The citric acid cycle is carried out there. This is a critical phase in the production of ATP, an energy molecule used in cell respiration. It has a component known as a nucleoid that houses the mitochondrial DNA.

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A group of snakes that is unable to cross a river and is separated from a group of snakes on the opposite side is an example of the geographic isolation process (Option B).

The geographic isolation process refers to all types of geographic barriers such as rivers that limit the gene flow between individuals of the same species.

Therefore, with this data, we can see that the geographic isolation process is associated with a limited gene flow in a population due to geographic barriers between individuals.

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Answer: no

Explanation:

because binding of lactase to the repressor protein  always the RNA polymerase to bind to promoter thus the structural genes could the production of enzyme lactase however if lactase doesnt bind the active repressor protein binds to the operator hindering the rna polymerase from binding on the promoter so there will be no genes for lactase production transcribed

24 kcal The greatest energy is needed by hawk (carnivore) creatures in an ecosystem to maintain existence.

Entry-level encyclopedia vocabulary An ecosystem is a region where a bubble of life is created by plants, animals, and other organisms interacting with the weather, environment, and other factors. Abiotic variables, or nonliving components, coexist with biotic components in ecosystems.

The interactions between species and the environment produce a natural ecosystem. An ocean, for instance, is categorized as a marine ecosystem since it contains algae, consumers, and decomposers. This kind of ecosystem goes through a cycle that starts with algae producing energy through photosynthesis.

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In the surroundings where the animals are found, an ecosystem must have an abiotic component.

Dictionary for beginning users. An ecosystem is indeed a place where so many living creatures, such as plants, animals, as well as other species, coexist to form a bubble of life. Abiotic (or nonliving) and biotic (or alive) components both make up ecosystems.

Healthy ecosystems keep our soil in good condition, recycle nutrients, keep the air clean, manage our water supplies, control the climate, and give us food. They supply the necessary resources and raw materials for making medications and other goods.

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Answer:

it gives us genetic variation

crossing over is where both parent cells mix to form unidentical daughter cells right, therefore when both genes mix, the offspring gets the mixture of both parents and that is genetic variation and it is also how you get biodiversity

The total amount of energy conserved in the ecosystem is option 1, Some energy is transferred to the organisms, and the remaining energy is released into the ecosystem as thermal energy.

The sun provides all the energy in a forest ecosystem and every other ecosystem. Consumers and producers are the two main organisms that energy flows through and plants are producers. Plants are the only known producers to use the energy provided by the sun.

Energy is transferred to the plant organisms and the rest of it is expelled to the ecosystem to be used as thermal energy.

The full question is:

The image shows a rain forest ecosystem. The energy from plants, or producers, acts as the starting point of energy in the ecosystem. This energy is transferred to other organisms in the food web. In which two ways is the total amount of energy conserved in the ecosystem?

1. Some energy is transferred to the organisms, and the remaining energy is released into the ecosystem as thermal energy.

2. Bacteria eat the dead bodies of organisms to release the organisms’ stored energy into the atmosphere.

3. Some energy is transferred to the smaller organisms, and the rest is stored in the bodies of larger animals.

4. Some energy is transferred to the organisms, and the rest is released by plants in the form of carbon dioxide.

5. Bacteria eat the dead bodies of organisms, obtain all the energy, and store it in their bodies.

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Answer: The amount of oxygen in the atmosphere increased.

Examples of electron are hydrogen atom and example of non electron are lithium

Electron are the smallest of the particles that makeup ab atom and they carry a negative charge and the number of proton and electron is equal in a neutral atom and the hydrogen atom for example has a just one electron and one proton and the uranium atom on the other hand has 92 proton and 92 electron and a non electron also called as non bonding electron and a non bonding electron is an electron not involved in chemical bonding and this can refer to the lone pair and with electron localized on one atom and non bonding electron with the electron delocalized throughout the molecule

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Answer: It is a wire

Explanation:

Gram-positive cocci, catalase positive, and coagulase positive is due to Staphylococcus aureus, which is the bacterium that causes bacterial tracheitis.

Bacterial tracheitis is a bacterial disease associated with pneumonia which is caused by Staphylococcus aureus bacteria and it has as its main symptom a high fever as well as difficulty for breathing, thereby it should be immediately treated in clinical settings.

Therefore, with this data, we can see that bacterial tracheitis is a life treating disease caused by the Staphylococcus aureus bacteria and it is associated with high fever symptoms.

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Answer:

The main example of compound is water represented by the chemical formula H2O which indicates 2 atoms of hydrogen combines with 1 atom of oxygen, sodium chloride etc and non-compounds are those which does not combine with two elements like bromine molecule represented by Br2.

EXAMPLES

NON EXAMPLE

Answer:

They are basic functional unit of life

The correct solution will be- the control group of plants with leaves on them.

Harvester ants are the ants which acquire the seeds of the plants and shop them as a supply of meals of their nests in soil.

The experimenter observes that stripping of the plant leaves via way of means of the ant will increase the thickness. The test turned into designed to look at the thickness of the stem with one institution wherein the leaves have been stripped via way of means of the people and one institution with leaves stripped via way of means of the ants.  

These instances constitute the experimental agencies wherein stem thickness will fluctuate however it lacked the manage institution in an effort to have the flora with their leaves gift on them and stopping them from stripping via way of means of human and ants.

This manage institution will offer a connection with the experimental agencies and could enhance the test.

Thus, the manage institution of plants with leaves on them is the ideal solution.

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In meiosis I, homologous chromosomes of a pair are separated from each other. Option A.

Meiosis is otherwise known as the division of sex cells or reductional division. It is a division in which diploid cells divide to produce haploid cells.

Meiosis occurs in 2 main stages:

Meiosis I consists of prophase I, metaphase I, anaphase I, and telophase I. Meiosis II, on the other hand, consists of prophase II, metaphase II, anaphase II, and telophase II.

At the prophase I stage of meiosis I, chromatin materials thicken to form threads and homologous chromosomes pair up to form a tetrad. Non-sister chromatids then go ahead to exchange chromosomal segments in a process known as crossing over.

At metaphase I, paired homologous chromosomes line up at the center of the cell to form a metaphase plate. Spindle fibers engage each tetrad.

At anaphase I, homologous chromosomes of a pair are pulled apart by the shortening of the spindle fibers. Their journey to the poles is completed at telophase I. This effectively ends the journey of meiosis I before the cell proceeds to meiosis II.

In other words, the separation of homologous chromosomes of a pair happens during meiosis I.

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