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Only about 0.3% of Earth's water is freshwater. Of that, only about 1.2% can be used as drinking water, So, option C is correct.

The term "the water planet" is commonly used to describe Earth. That name evokes the idealized notion of a world with an abundance of water. Our planet has more water than land, as seen in images captured from space. Just roughly 0.3 percent of our fresh water may be found in the surface water of lakes, rivers, and swamps, which means that more than 99 percent of the water on Earth is useless for people and many other living things.

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The complete question is:

Which best describes the amount of earth’s total water supply that is usable freshwater?

a) more than 70%

b) almost 60%

c) less than 1%

d) only 3%

Answer:

so that is how it goes hope this helps

Explanation:

Cells use the hydrolysis of ATP to perform cellular work by: energy coupling, endergonic/exergonic, phosphate transfer, and phosphorylated intermediate.

ATP is a molecule that is necessary for energy in the body. ATP can be hydrolyzed in a test tube to form ADP and inorganic phosphate. When this happens, free energy is released as heat to the surroundings. This would be a wasteful use of energy and dangerous rising temperatures would lead to the denaturation of enzymes.

In a cell, however, the hydrolysis of ATP can be used to perform cellular work. Cells can use energy coupling to perform cellular work. This means that the endergonic and exergonic reactions are coupled together. In an endergonic reaction, energy is required to proceed. In an exergonic reaction, energy is released.

When these two reactions are coupled together, energy from the exergonic reaction can be used to drive the endergonic reaction. Phosphate transfer is another way that cells can use the hydrolysis of ATP to perform cellular work. When ATP is hydrolyzed, one of the products is inorganic phosphate.

This inorganic phosphate can be transferred to another molecule, making that molecule more reactive. Phosphorylated intermediates are another way that cells can use the hydrolysis of ATP to perform cellular work. When ATP is hydrolyzed, one of the products is ADP.

ADP can be phosphorylated by the addition of another phosphate group from ATP. This creates a molecule of ATP and a phosphorylated intermediate. This phosphorylated intermediate can be more reactive than the original molecule.

Overall, cells use the hydrolysis of ATP to perform cellular work through energy coupling, phosphate transfer, and phosphorylated intermediates. These processes allow cells to use the energy from ATP more efficiently and avoid the wasteful release of heat.

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The steps involved in the transmission of an impulse from an axonal terminal across a synapse to the receptor membrane of a dendrite are

In the transmission of an impulse from an axonal terminal across a synapse to the receptor membrane of a dendrite, there are several steps involved that are quite intricate. Here are the steps involved:

Step 1:

When an impulse reaches the axonal terminal, the terminal depolarizes, and the influx of calcium ions results in their binding to proteins that trigger the process of exocytosis.

Step 2:

The influx of calcium ions leads to the process of exocytosis of neurotransmitter, and the neurotransmitter molecules are released into the synaptic cleft. The synaptic cleft is the narrow gap that exists between the axonal terminal and the receptor membrane of the dendrite.

Step 3:  

After the neurotransmitter molecules have been released into the synaptic cleft, they diffuse across this cleft to reach the receptor sites on the dendrite membrane, where they bind.

Step 4:

When the neurotransmitter molecules bind to the receptor sites on the dendrite membrane, this binding triggers the opening of ion channels in the dendrite membrane, which leads to the influx of sodium ions. This influx of sodium ions results in the depolarization of the dendrite membrane, which in turn leads to the generation of an action potential in the dendrite.

Step 5:

The depolarization of the dendrite membrane is followed by its repolarization, which occurs when the influx of sodium ions is replaced by the efflux of potassium ions from the dendrite membrane. This efflux of potassium ions leads to the restoration of the membrane potential of the dendrite membrane.

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Answer: mRNA

Explanation: Messenger RNA

The solutes that are reabsorbed from the nephron loop include (a) Sodium ions, (c) Chloride ions, and (d) Water. Glucose and amino acids are reabsorbed in the proximal convoluted tubule, while potassium ions are primarily reabsorbed in the distal convoluted tubule and collecting duct.

The loop of Henle, also known as the nephron loop, is a U-shaped portion of the renal tubule that conducts urine inside a renal medulla. The nephron loop aids in the production of concentrated urine in the body. Urine flows through the nephron loop, which separates salts and wastes from water. The descending limb of the loop of Henle reabsorbs water, and the ascending limb reabsorbs salt.

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The lagging strand synthesis occur to the right of the dotted line at bottom strand, option B.

The rate of synthesis of the complementary strands of double-stranded DNA varies throughout replication. The leading strand is where replication starts out. On the lagging strand, replication begins later, moves more slowly, and develops irregularly.

Between the synthesis of the leading strand and the synthesis of the lagging strand, there are a number of significant distinctions. 

1) Lagging strand synthesis occurs in the opposite direction from the direction that the replication fork opens, whereas leading strand synthesis occurs in that direction. 

2) Whereas numerous RNA primers are needed for lagging strand synthesis, only one primer is needed for leading strand synthesis. 

3) The leading strand requires just DNA polymerase to continue replication after initial primer synthesis, but the lagging strand requires many enzymes, such as DNA polymerase I, RNase H, and ligase. 

4) The lagging strand is produced as a sequence of shorter pieces known as Okazaki fragments, whereas the leading strand is formed as a single continuous piece.

Owing to the varying genome sizes of prokaryotes and eukaryotes, the method of lagging strand production differs between them. The most noticeable variation is the length of the Okazaki pieces. The usual Okazaki fragment length is roughly 1000 to 2000 nucleotides in prokaryotes, but only 100 to 200 nucleotides in eukaryotes.

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The sequence of nucleotides in DNA determines the sequence of nucleotides in mRNA through complementary base pairing, and the sequence of nucleotides in mRNA determines the sequence of amino acids in a protein through the genetic code.

The structure of DNA, specifically the sequence of nucleotides, determines the sequence of amino acids in a protein.

A gene, which is a specific sequence of nucleotides in DNA, is transcribed into messenger RNA (mRNA) by RNA polymerase. The mRNA carries the instructions for building a protein to the ribosome, where it is translated into a sequence of amino acids. The sequence of amino acids in a protein determines its structure and function, and ultimately contributes to the overall function of the cell.

DNA contains the genetic information that codes for the instructions for traits passed from parents to offspring. This genetic information is organized into genes, which are specific sequences of nucleotides in the DNA. During sexual reproduction, the genetic information from each parent is combined, and the resulting offspring inherits a unique combination of genes. The expression of these genes determines the traits that are passed from parent to offspring.

Natural selection is the process by which certain traits become more or less common in a population over time. In the case of moths, changes in the environment, such as pollution or changes in the prevalence of predators, can select for traits that increase an individual's survival and reproductive success.

For example, during the industrial revolution in England, pollution caused the bark of trees to darken, making it more difficult for light-colored moths to blend in and avoid predation. As a result, the frequency of dark-colored moths increased over time, while the frequency of light-colored moths decreased.

Changes in the environment, such as pollution or changes in climate, can result in changes in moth populations through natural selection.

For example, in the case of the peppered moth, changes in the color of tree bark due to pollution selected for darker colored moths, while changes in climate may select for different traits such as changes in flight patterns or feeding behaviors. Over time, these changes can lead to the evolution of new species or populations with different adaptations to their environment.

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Complete question:

9) Molecules to Organisms: Structures & Processes (2pts) Construct an explanation based on evidence for how the structure of DNA determines the structure of proteins, which carry out functions in cells that

10) Heredity: Inheritance & Variation of Traits (2pts) Explain relationships about the role of DNA in coding the instructions for traits passed from parents to offspring. (LS3-1)

11) Biological Evolution: Unity & Diversity (2pts)

Construct an explanation based on evidence for how natural selection leads to adaptation of moth populations in a changing environment. (LS4-4)

12) Ecosystems: Interactions, Energy, & Dynamics (2pts) Explain how interactions between moths and their predators maintain relatively consistent numbers in stable conditions. Also, explain how changes in environment resulted in changes in moth populations (LS2-6). Use

Answer:

2

About 60% of this electricity generation was from fossil fuels—coal, natural gas, petroleum, and other gases. About 18% was from nuclear energy, and about 22% was from renewable energy sources

Duplicated chromosomes are called sister chromatids. The correct option is B.

A chromatid is one of the two identical halves of a replicated chromosome, both of which are joined at the centromere. During the cell cycle, chromosomes are replicated in the S phase of interphase, resulting in the formation of two identical sister chromatids that are held together by a centromere.

The two sister chromatids are virtually identical in every way because they are formed as exact replicas of one another. This happens during the S phase of the cell cycle when DNA is replicated in a cell. Once the chromosomes are replicated, each of the two copies is referred to as sister chromatids because they are still identical to one another.

However, each sister chromatid will later be pulled to the opposite side of the cell during cell division. Duplicated chromosomes, also known as sister chromatids, are unique to eukaryotic cells because they are a result of the way that eukaryotic cells replicate their DNA. Chromosomes are replicated in the S phase of interphase, resulting in two identical sister chromatids that are held together by a centromere.

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Answer:

either a or d.

Answer:

В

Explanation:

Recessive green, but there is no information about yellow, it is most likely that it is also recessive, but this does not change the essence. They will be both yellow and green, you can even make a Pinetto table

Ecology is the study of interactions between organisms and their environment. The different levels of study in ecology are known as biosphere, ecosystems, communities, populations, and individuals. They are ordered from the largest to the smallest levels of organization.

The following are the five main levels of study in ecology from smallest to largest:

1. Individuals: Individuals are the smallest level of organization in ecology. They are living organisms, such as plants and animals, that can reproduce and survive on their own.

2. Populations: A population is a group of individuals of the same species living in the same area. Populations can be studied to understand the changes in their numbers, distribution, and genetic makeup.

3. Communities: A community is made up of populations of different species that interact with one another. Communities can be studied to understand how species interact with each other and how they respond to environmental changes.

4. Ecosystems: An ecosystem is a community of organisms and their environment. Ecosystems can be studied to understand how living and non-living factors interact with each other, and how they influence the functioning of the ecosystem.

5. Biosphere: The biosphere is the largest level of organization in ecology. It includes all living organisms on Earth and their interactions with the physical environment. The biosphere can be studied to understand how the Earth's ecosystems are connected and how they function as a whole.

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The enzyme that modulates the ability of myosin to bind actin in smooth muscle is myosin light-chain kinase.

Enzymes are proteins that act as biological catalysts, accelerating the speed of chemical reactions in living organisms. The majority of enzymes are globular proteins with specific three-dimensional shapes that determine how they bind substrates and catalyze reactions. The majority of metabolic processes, including those responsible for energy generation and metabolism, are aided by enzymes.

The skeletal muscle and smooth muscle differ in the regulation of muscle contraction. Calcium ions regulate contraction in smooth muscle, whereas troponin regulates contraction in skeletal muscle. The molecular mechanism by which calcium regulates smooth muscle contraction has been shown to involve a protein called calmodulin, which binds calcium and triggers a series of events that result in the phosphorylation of myosin.

The phosphorylation of myosin, in turn, modulates the ability of myosin to bind actin, allowing for muscle contraction. The phosphorylation of myosin is controlled by an enzyme known as myosin light-chain kinase (MLCK). MLCK is a member of the kinase family and is specific to myosin light chains.

MLCK phosphorylates the light chains of myosin, allowing them to bind to actin, resulting in muscle contraction. As a result, the activity of MLCK is critical for the regulation of smooth muscle contraction.

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Limestone bedrock would weather faster than quartz sandstone due to its chemical composition. Limestone is primarily composed of calcium carbonate, which is easily dissolved by acidic rainwater.

This process is known as chemical weathering, which can cause the limestone to erode and dissolve over time. On the other hand, quartz sandstone is made up of more resistant minerals such as quartz, feldspar, and mica, which are not easily weathered.

Quartz sandstone is more resistant to chemical weathering due to its mineral composition, but it is susceptible to physical weathering processes such as frost wedging and abrasion.

Overall, the rate of weathering depends on several factors, including the mineral composition of the rock, climate, and exposure to weathering agents.

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Answer: Chondrocyte cells and generalized prokaryotic cells are vastly different in their structure and function. Chondrocyte cells are specialized cells found in cartilage tissue and are eukaryotic cells with a defined nucleus, while prokaryotic cells lack a nucleus and other membrane-bound organelles. Chondrocytes are also much larger than prokaryotic cells. Chondrocytes function in the production and maintenance of cartilage tissue, while prokaryotic cells perform a variety of functions such as metabolism, reproduction, and genetic transfer. Both cell types use energy to perform their functions, but the mechanisms for energy production are different, with chondrocytes utilizing aerobic respiration and prokaryotic cells often relying on anaerobic respiration or fermentation. Despite these differences, both chondrocyte cells and prokaryotic cells are critical components of complex biological systems and play essential roles in maintaining the health and function of living organisms.

The ultimate explanations of behavior focus on genetic, neurological, and hormonal mechanisms of behavior. Correct alternative is E.

The ultimate explanations of behavior refer to the study of evolutionary factors that contributed to a particular behavior of an organism. It answers why certain behaviors are selected by natural selection. The answer to the question is that the ultimate explanations of behavior focus on genetic, neurological, and hormonal mechanisms of behavior.

It is a study of evolutionary factors that contribute to the behavior of an organism.

Therefore Correct alternative is E (genetic, neurological, and hormonal mechanisms of behavior.)

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The key innovation that allowed for plant survival on land, seen in the first land plants and all others after, but not in the charophytes, is b. vascular tissue.

Vascular tissue is a collection of specialized tissues that transport water, mineral nutrients, and organic substances throughout vascular plants, from the roots to the tips of the shoots. This feature enables plants to move away from the humid, aquatic environments in which their predecessors thrived.

The development of vascular tissue provided plants with a mechanism for distributing water and nutrients throughout their tissues, resulting in greater efficiency and growth potential. As a result, plants could grow higher, establish a greater reach, and expand into diverse habitats, from temperate forests to desert plains. The correct option is B, vascular tissue.

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The true and false statements about race are as follows:

True Statement(s): There is no race chromosome in our DNA, Race is a social construct.

False Statement(s): Race is by definition about differences in physical appearance, Race is not real.

Race is a concept used to categorize humans into distinct groups based on physical and biological characteristics, such as skin color, facial features, and hair texture.

Race has been used to distinguish groups of people and has been historically tied to social, economic, and political power. However, the concept of race is not supported by modern genetic research, as genetic variations do not align with racial categories. Thus, there is no race chromosome in our DNA.

Race is a social construct that is subject to change over time and varies between different cultures and societies.

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Complete question:

identify the true and false statements about race.

There is no race chromosome in our DNA.

Race is a social construct.

Race is by definition about differences in physical appearance.

Race is not real.

Option d would be the correct solution to the question provided. Little available water.

The epidermis is the outermost layer of the skin, which serves as a protective barrier between the body and the external environment. It is made up of stratified squamous epithelial cells that are tightly packed together and arranged in layers.

The epidermis is composed of four or five layers, depending on the location on the body. The outermost layer, called the stratum corneum, is composed of dead, flattened cells that are continuously shed and replaced with new cells from the lower layers of the epidermis. The other layers, from outer to inner, are the stratum lucidum (only present in thick skin), stratum granulosum, stratum spinosum, and stratum basale (also known as the basal cell layer).

The epidermis has several important functions. It helps to protect the body from physical and chemical damage, as well as from microbial invasion. It also helps to regulate body temperature by controlling the loss of water through the skin. In addition, the epidermis contains melanocytes, which produce the pigment melanin that gives skin its color and protects it from the harmful effects of ultraviolet radiation.

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Full question:

Structures represented in the illustration below are found in the lower epidermis of a plant leaf. The illustration at right shows the response to a certain environmental condition.

The response represented in the illustration would most likely be caused by —

A a reduced supply of oxygen

B long periods of rainfall

C high concentrations of glucose

D little available water

Answer:

Explanation:

it is important because it gives the body shape

The microorganisms that use carbon dioxide as a carbon source and catabolize organic molecules for energy are chemoautotrophs.

Chemoautotroph is an organism that obtains energy by oxidizing inorganic compounds and uses carbon dioxide as a carbon source. Chemoautotrophs are bacteria that derive energy from chemical reactions and utilize carbon dioxide as their primary carbon source.

Chemoautotrophs are also known as chemolithotrophs, chemosynthetic bacteria, or lithotrophs. Chemoautotrophs derive their energy from inorganic substances such as sulfur, iron, and other elements that do not rely on sunlight to produce their own food. Examples of chemoautotrophs are nitrifying bacteria, sulfur-oxidizing bacteria, and iron-oxidizing bacteria.

They are generally found in hostile environments such as hot springs, deep-sea vents, and hydrothermal vents. Chemoautotrophs are a significant part of the ecosystem because they form the foundation of many food chains.

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The harvesting strategy that involves harvesting all trees in the entire forest and replacing them with a fast-growing species is clear-cutting.

It initially is high in profit, but yields little to no profit until it regrows. Clear-cutting is a harvesting method in which all trees in a designated area are harvested. As a result, a forest area can be harvested and turned into a tree farm or cleared land. While clear-cutting has been criticized for destroying ecosystems, the method has also been utilized in the past for its efficiency in generating rapid returns for investors.

Clear-cutting is a method of harvesting trees that involves cutting all of the trees in a designated area. It is done in order to create space for new trees to be planted, and it is used frequently by commercial logging companies. The practice has been criticized for its negative environmental impact, but it is still used in some cases because it is an efficient way to generate quick returns on investment.

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When one of the friends steps away, the rock will move in the direction of the remaining friend's force, since there is no longer an opposing force. The box will remain on top of the rock, as it is not affected by the horizontal motion of the rock.

When the two friends push with equal and opposite forces against the rock, the net force on the rock is zero. The box on top of the rock remains in place due to the balanced forces acting on it.

When one of the friends steps away, the balanced forces are disrupted and the net force on the rock is no longer zero. As a result, the rock may move in the direction of the remaining friend's push, causing the box on top to fall off the rock.

This happens because the box is not being held in place by any forces anymore, and its inertia causes it to continue moving in the direction of the rock's motion.

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Students demonstrate understanding of this condition when they identify that bacterial infections are the most common cause of conjutivitis.

Bacterial conjunctivitis is an inflammation of the conjunctiva, which is the clear membrane that covers the white part of the eye, and is caused by a bacterial infection.

Bacterial conjunctivitis in children is most commonly caused by Staphylococcus aureus. It usually affects both eyes and is accompanied by a sticky, yellow or green discharge from the eye. The eye may become red, inflamed and watery, and the eyelids may swell and itch. It is a highly contagious condition that can spread rapidly through close contact or shared items, such as towels or bedding, so good hygiene practices are essential to prevent its spread.

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Bryophytes and angiosperms plants have a gametophyte that is nutritionally dependent on the sporophyte. Here option B is the correct answer.

The gametophyte is a small, usually green plant that produces gametes (sperm and eggs) through mitosis. The gametophyte is nutritionally dependent on the sporophyte, which develops from the fertilized egg and remains attached to the gametophyte. The sporophyte produces spores that develop into new gametophytes, thus completing the life cycle.

In angiosperms, which are flowering plants, the gametophyte is greatly reduced and dependent on the sporophyte. The male gametophyte, also known as pollen, is produced by the sporophyte and consists of just a few cells. The female gametophyte, also known as the embryo sac, develops within the ovule of the sporophyte and consists of just seven cells.

The sporophyte provides the gametophyte with nutrients and protection, and the gametes produced by the gametophyte are involved in fertilization, which results in the formation of the next generation of sporophytes. In contrast, gymnosperms, monilophytes, lycophytes, and other plant groups have larger and more independent gametophyte stages that are not nutritionally dependent on the sporophyte.

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Complete question:

In the angiosperm life cycle, two sperm cells are discharged in each ovule. The reason that two sperm nuclei travel down the pollen tube is that they both stimulate the growth of the pollen tube one fertilizes the egg, and the other combines with the two polar nuclei one fertilizes the egg, and the other fertilizes the synergid one is for fertilizing the egg, and one directs the pollen tube toward the micropyle one fails in fertilization, there is a backup nucleus which plants have a gametophyte that is nutritionally dependent on the sporophyte?

A - gymnosperms and angiosperms

B - bryophytes and angiosperms

C - monilophytes and gymnosperms

D - lycophytes and bryophytes

E - lycophytes and monilophytes

A synapse involves two cells, a presynaptic cell that sends the signal, and a postsynaptic cell that receives the signal.

A synapse is a junction between two neurons (nerve cells) where the axon of one neuron reaches out to the dendrite of another neuron.

Synapses are present throughout the nervous system, and their primary role is to transmit information from one neuron to another. When the axon of a neuron fires, it releases chemicals known as neurotransmitters, which bind to receptors on the adjacent neuron's dendrites. This causes a change in the postsynaptic neuron's membrane potential, which may lead to the generation of an action potential.

The neurons that communicate through a synapse are called the presynaptic neuron and the postsynaptic neuron. The presynaptic neuron is the neuron that sends the signal across the synapse, while the postsynaptic neuron is the neuron that receives the signal from the presynaptic neuron.

The presynaptic neuron releases neurotransmitters that diffuse across the synapse and bind to receptors on the postsynaptic neuron's dendrites, causing a change in the postsynaptic neuron's membrane potential. The change in the membrane potential may cause the postsynaptic neuron to generate an action potential if the change is strong enough.

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The genetic material in bacteria is double-stranded DNA.

What is genetic material?

Genetic material refers to the material within a living organism that carries the genetic information that governs its growth, development, and characteristics. A gene is the basic physical and functional unit of heredity, made up of DNA, and is present in all living organisms.

Genetic information is passed from generation to generation via this genetic material. The genetic material in bacteria is double-stranded DNA.

What is DNA?

DNA is an abbreviation for deoxyribonucleic acid. It is a molecule that contains genetic information and is found in nearly all living organisms. DNA is a double-stranded, helical molecule that is composed of nucleotides. Each nucleotide is composed of a sugar, a phosphate group, and a nitrogenous base.

The four nitrogenous bases that make up DNA are adenine (A), thymine (T), cytosine (C), and guanine (G). These bases pair up to form base pairs, with A matching with T and C matching with G.The genetic material in bacteria is double-stranded DNA.

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