Select the accurate statement about water potential. Select the accurate statement about water potential. a. Adding solutes to water increases water potential. b. Free water moves from a region of lower water potential to a region of higher water potential. c. Water in a turgid cell has positive pressure potential.

Answer:

false

Explanation:

Drinking non-potable water does not carry significant health risks. The given statement is false.

Non-potable water is the water which is not treated to drinking water standards and it is not meant for the human consumption. Non-potable water, such as the raw or untreated water from the reservoirs. Non-potable water is used for the irrigation and other purposes, in addition to recycled water which is used for highly-treated wastewater.

Microbiologically, the contaminated drinking water can transmit diseases such as the diarrhea, cholera, dysentery, typhoid and polio and it is estimated to cause over 485000 diarrheal deaths each year.

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Since the given organisms prepare their own food, hence none of the organisms mentioned are heterotrophs. Thus, the correct answer is Option D.

Heterotrophs are organisms that depend on other species (plants and animals) for food since they are unable to prepare it for themselves. They are dependent on these producers for food, either directly or indirectly.  

The rose and the pine tree, two of the choices given, are both autotrophs since plants can make their own food through photosynthesis. On the other hand, the deep-sea tubeworm is a chemoautotroph, meaning it gets its energy from inorganic substances in its surroundings.

Therefore, the correct answer is Option D.

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Tropomyosin is a protein that stabilizes existing actin microfilaments.

Tropomyosin is a two-stranded, alpha-helical coiled-coil protein that twists along the actin filament surface, spanning seven actin monomers. It stabilizes existing actin microfilaments by preventing actin polymerization and depolymerization.Tropomyosin is a long, thin, fibrous protein that binds to the actin molecule's grooves.

It stabilizes actin microfilaments by promoting the formation of microfilaments and inhibiting the depolymerization of microfilaments by sterically blocking actin filament association. Tropomyosin's coiled coil binds to a continuous groove on the surface of actin monomers, which serves as a scaffold for troponin to attach to tropomyosin.The tropomyosin molecule stabilizes the actin filament by preventing the myosin head from binding to the actin monomers, causing muscle contraction.

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Explanation:

carbs are mostly/ sugar, turned to glucose, then glucagon so cells can absorb broken down sugars or starches..

the body uses these sugars for fight or flight mode...

fats are made of proteins we eat. the body needs both to maintain homeostasis.

fat stays in the body longer because our bodies use this to contribute to survival to keep vital organs like the heart & muscle tissue working..

if you dont eat both u become lethargic, sleeping a lot, and higher thirst-rate.

If the movement of molecules or ions requires a protein channel, it is called facilitated transport still it does not require energy. The given statement is true.

Facilitated diffusion is the process of spontaneous transport of molecules or ions across a biological membrane via some specific transmembrane integral proteins such as channels or carrier proteins.

Facilitated diffusion is also called the carrier-mediated diffusion because a substance which is transported in this manner diffuses through the membrane with the help of a protein. That is, the protein facilitates diffusion of the substance to the other side of the membrane.

Facilitated diffusion does not require high energy molecules such as ATP like active transport. This type of diffusion uses protein to transport molecules across the plasma membrane.

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Your question is incomplete, most probably the complete question is:

If the movement of molecules or ions requires a protein channel of some sort, it is called facilitated transport still requiring no energy. True or False?

The process of evolution explains the diversity and unity of life. The imperfections of living organisms provide evidence for the process of evolution.

These imperfections are a result of evolutionary compromises and historical constraints.

For example, the recurrent laryngeal nerve in mammals takes a detour around the aorta, resulting in a much longer route than necessary.

This detour is an evolutionary relic from fish, where the nerve had a shorter route to the gills. In giraffes, the nerve takes an even longer detour due to the elongation of the neck.

These imperfections are a result of natural selection acting on existing structures, rather than designing new ones from scratch.

Another example is the human eye, which is often cited as an example of "intelligent design" due to its complexity.

However, the human eye has several imperfections, such as a blind spot where the optic nerve exits the retina and the presence of blood vessels in front of the retina, blocking some light.

These imperfections are a result of evolutionary history, where the eye evolved from a simple light-sensitive patch in early animals.

In summary, the imperfections of living organisms provide evidence for the process of evolution, which acts on existing structures and is constrained by historical and physical factors.

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The movement of water across a membrane from an area of high to low water concentration is an example of osmosis and passive transport.

What is Osmosis?

Osmosis is the diffusion of water across a semipermeable membrane from a high concentration to a low concentration of solutes.

Water molecules move across the membrane in both directions, but more water will move into the solution with more solutes. The diffusion of water across the membrane from high to low water concentration is called osmosis.

During osmosis, the water moves through the selectively permeable membrane to equalize the concentration of solutes on both sides of the membrane. The solution with fewer solutes has a higher water concentration.

What is passive transport?

Passive transport is a process of moving ions and other molecular substances across cell membranes. Because it does not require energy, passive transport does not require the use of ATP.

Materials move down their concentration gradient through the process of passive transport. Simple diffusion, facilitated diffusion, and osmosis are examples of passive transport.

What is active transport?

Active transport is the energy-dependent movement of molecules across a cell membrane, typically moving from areas of lower concentration to higher concentration. Unlike passive transport, active transport requires ATP to function.

One example of active transport is the sodium-potassium pump.

What is diffusion?

Diffusion is the movement of molecules or ions from a region of higher concentration to a region of lower concentration. Diffusion is caused by random movement, and it is a type of passive transport.

What is turgor?

Turgor pressure is the force within a plant cell that pushes the plasma membrane against the cell wall, giving the cell its structure and shape. Turgor is caused by osmosis, where water enters the cell and pushes the plasma membrane against the cell wall, causing it to swell and become rigid.

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C ). The hydrophilic head attracts water, and the hydrophobic fatty acid tail repels water. The structure of the phospholipid is related to its function as a major component of cell membranes.    

Phospholipids have a polar hydrophilic head composed of a phosphate group and a glycerol molecule, and nonpolar hydrophobic tails composed of fatty acid chains. This structure creates a bilayer in which the hydrophilic heads face outward towards the aqueous environment, while the hydrophobic tails face inward away from the water.

This arrangement provides a barrier that separates the cell's internal environment from the external environment. The hydrophobic tails prevent water-soluble molecules from passing through the membrane, while the hydrophilic heads allow the passage of water and small polar molecules. The fluidity of the phospholipid bilayer is also important for cell membrane function, as it allows for the movement of molecules across the membrane. Therefore, the specific arrangement of the hydrophilic and hydrophobic components of the phospholipid is essential to the function of the cell membrane.

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Answer:

Yes

Explanation:

To determine if the student's calculation of the density of the aluminum is accurate, we can compare it to the known or accepted density of aluminum. The accepted density of aluminum is approximately 2.7 g/cm^3, so the student's calculated density of 2.7 g/cm^3 is in agreement with the accepted value.

Therefore, based on the information given, the student's calculation appears to be accurate.

Answer:

here you go

Explanation:

There are four nitrogenous bases found in DNA that are called guanine, adenine, thymine and cytosine. They are abbreviated by the first letter in their name, or G, A, T and C. The bases can be divided into two categories: Thymine and cytosine are called pyrimidines, and adenine and guanine are called purines.

A solid ball of about eight cells formed about 50 to 60 hours after fertilization is called a morula.

Define fertilization.

One sperm and one egg must recognize each other and fuse during the highly complex sexual reproductive process known as fertilization. Haploid gametes can build a genetically different person through fertilization and return to the usual number of chromosomes.

The first stage of development follows the union of an egg cell and a sperm cell, and is known as the zygote or fertilized egg (the fertilization ). The morula is a cell clump made up of 16–32 tiny diploid cells that develops from the zygote by cleavage (cell division). The embryo's volume doesn't grow throughout this initial period of development. The first cell differentiation happens in the generated morula.

The clump of cells develops into the embryoblast, which can be further subdivided into epiblast and hypoblast, the actual final embryo. The cells on the surface develop into the trophoblast, which gives rise to the placenta and amniotic membranes.

Because the embryo has formed a cavity known as the blastocoel, the blastula stage can be distinguished from the morula stage. The ab-embryonic pole is the side opposite the embryonic pole, which is the side where the cells that will make up the embryoblast are found. The trophoblast divides into syncytiotrophoblast and cytotrophoblast. The embryo inserts itself into the endometrium once it has reached the uterus.

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answer:

stars create new elements in their cores by squeezing elements together in a process called nuclear fusion

explanation:

Glyphosate is the active ingredient in the herbicide called ROUND-UP. What common blological molecule does glyphosate resemble option (e) an amino acid.

Glyphosate, the active component, is the substance that actually eradicates weeds. The active ingredient in Roundup Ultra is described as "Glyphosate, N-(phosphonomethyl) glycine, in the form of its isopropylamine salt," according to the product label.

A weak acid is a type of chemical that includes glyphosate. Weak acids can give other substances a hydrogen ion. When glyphosate is made into a commercial product, a different salt is used in place of the hydrogen ion on the parent weak acid (ion). Although the salt itself lacks herbicidal capabilities, it produces a substance that is more manageable, blends better with other agricultural chemicals, and/or is more efficient than the original weak acid.

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The main factor that determines the stages a star will follow after the main sequence is the star's mass or size.

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Answer:

The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth.

Accessory organs: Liver: produces bile salts

Small intestine: Mixes chyme with digestive juice

Stomach: Mixes and churns food with gastric juice

Mouth: Ingests food; Chews and mixes food

Explanation:

Because organisms absorb pesticides at a rate greater than that at which the chemical is lost, human use of pesticides to control insect pests introduces toxic chemicals into the food chain. The term pesticide pollution can be used to describe this situation

Soil, water, turf, and other vegetation can be tainted by pesticides. Pesticides can be harmful to a wide range of other organisms, including fish, beneficial insects, non-target plants, and insects and weeds. Pesticide drift occurs when pesticide particles that are suspended in the air are carried by the wind to other locations and may contaminate them.

Pesticides can significantly reduce, alter the behavior of, or eradicate populations of plants and animals, in addition to their direct toxicity. A trophic cascade, also known as a cascade up and down food chains, can result from these effects. One easily understood example of ecosystem-mediated pesticide effects is a trophic cascade.

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more light means more photosynthesis means more oxygen

closer to light the more oxygen is produced

distance from light & oxygen produced is in an inverse relationship which means when one goes up the other goes down

According to the data on the table, when the distance from the light increased, the bubbles produced per minute have decreased. The relationship between the two variables shows an inverse one. This means that if one variable increases, then the other one decreases, and vice-versa. Using this information, we can conclude that when the aquatic plant is placed far from light, it gets less sun exposure. This affects the rate of photosynthesis, including its by-products. When the rate of photosynthesis is slow, the oxygen produced as a waste product is also low.

quizlet

Answer:

mountain and coastal plains

Explanation:

i think it would be coastal plains because the area with low elevation is near the sea. only one answer has coastal plains in it, so use process of elimination. additionally, mountain makes sense since theyre usually steep and end in a peak.

Answer: mountain and coastal plains  

Explanation:

According to the question, a hiker crosses a topography near the sea which has low elevation and low relief and proceeds to climb steeply to reach a peak.

The two landforms the hiker experienced are mountain and coastal plain.

A coastal plain is a flat, low-elevation land which is close to the sea.

A mountain is an elevated land form that has a peak and is higher and more difficult to climb than a hill.

Answer:

The lysosome digests molecules

The only true statment from above given options.

hope it helps!

The statements that correctly matches a cell part with its function is the lysosome digests molecules.

A lysosome is the organelle of the cell. It is a spherical-shaped organ, and its main function is to engulf molecules that enter the cell and are harmful to the cell.

Thus, the correct option is D.

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That's correct! The type strain serves as a reference point for determining the characteristics and boundaries of a particular species.

When classifying organisms into a species, it is a well-known and representative strain that other strains are compared to.To examine their similarity and identify if they belong to the same species, newly discovered strains or isolates are compared to the type strain. The new strain is regarded as a member of the species if it has traits and genetic relationships in common with the type strain. The new strain, on the other hand, might be eliminated from the species and categorised separately if there are substantial variations between it and the type strain.To determine its distinctive characteristics and designate the species, the type strain goes through extensive characterisation, which includes different tests and studies.

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The organism in question belongs to the Euglenoid group within the Protista kingdom due to its single-celled, aquatic, motile nature, ability to engulf food particles, presence of chloroplasts with chlorophyll, capability of photosynthesis, and well-defined nucleus.

Based on the given characteristics, I would classify this organism as a member of the Protista kingdom, specifically belonging to the group called Euglenoids.

The reasons for this classification are:

1. Single-celled: Euglenoids are unicellular organisms, which means they are composed of just one cell.
2. Aquatic: They are typically found in freshwater environments.
3. Motile: Euglenoids can swim using their flagellum, a whip-like structure that helps them move through the water.
4. Engulfs food particles: Euglenoids can consume food particles through a process called phagocytosis, where they surround and ingest the particles.
5. Contains chloroplasts with chlorophyll: Euglenoids possess chloroplasts, which are the cellular structures responsible for photosynthesis, and they contain chlorophyll, the green pigment necessary for this process.
6. Capable of photosynthesis: Being able to perform photosynthesis allows euglenoids to produce their own food using light energy, carbon dioxide, and water.
7. Apparent nucleus: Euglenoids have a well-defined nucleus, which is a characteristic of eukaryotic organisms.

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Answer:

which picture. ??? no pic no help sorry

Answer:

enzyme are protein that speed chemical reaction ..

Option A is NOT true regarding the G-protein coupled receptor family.

What are G-protein coupled receptors?

G-protein coupled receptors (GPCRs) are a diverse family of transmembrane receptors that respond to a wide range of external stimuli by activating intracellular signaling pathways.

A G protein-coupled receptor is a transmembrane protein with seven transmembrane domains that extend through the lipid bilayer of the cell membrane (7TM).

These are common cell membrane receptors that interact with G proteins, making up the G-protein coupled receptor family.

As a result, it activates an intracellular signal transduction pathway that eventually leads to a cellular response.

The correct option that is not true is Option A.

Since GPCRs have intrinsic enzymatic activity, they can function independently of other transmembrane receptors.

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To visualize smaller and lower-contrast objects during interventional procedures, high-level-control fluoroscopy uses exposure rates that are higher than those normally used in routine fluoroscopy.

Fluoroscopy is a medical imaging technique that uses X-rays to generate real-time images of the body's internal structures. During fluoroscopy, a continuous stream of X-rays is directed through the body and onto a fluorescent screen or digital detector, which captures and displays the resulting image in real time.

Fluoroscopy is often used to guide minimally invasive procedures, such as catheterizations, biopsies, and injections, as well as to diagnose and monitor a variety of conditions, including gastrointestinal disorders, skeletal abnormalities, and cardiovascular disease. Fluoroscopy is a highly effective imaging tool, but it also exposes patients and medical staff to ionizing radiation, which can increase the risk of cancer and other health problems. As such, strict protocols and safety measures are in place to minimize radiation exposure during fluoroscopy, including the use of protective clothing, shielding, and radiation monitoring devices.

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Answer:

kilometers

Explanation:

a kilometer equals 1,000 meters

Answer:

D. A and B

Explanation:

Rusting occurs when a metal is exposed to both oxygen and water/moisture.