Which of the following statements best explains
why the lower mantle of Earth is much more
rigid and dense than the upper mantle?
A. The lower mantle is older than the upper
mantle.
B.
The lower mantle is cooler than the upper
mantle.
C.
The lower mantle is under more pressure
than the upper mantle.
D. The lower mantle is farther from the core
than the upper mantle.

Na+, K+, and insulin cannot cross the cell membrane without help whereas Glucose, oxygen, carbon dioxide and Fructose can diffuse.

Small nonpolar molecules like oxygen and carbondioxide are soluble in the lipid bilayer and so they can easily cross cell membranes. Small molecules such as water can also diffuse through cell membranes but larger molecules such as glucose, cannot diffuse through the cell membranes. Nonpolar molecules can pass through the cell membrane easily. Some larger nonpolar molecules like steroid hormones can also pass through the cell membrane easily. Moving through the cell membrane without the need for assisting proteins is called passive diffusion.

So we can conclude that  Glucose, oxygen, carbondioxide and Fructose can cross the cell membrane without energy.

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From youngest to oldest: Conglomerate, Breccia, Shale, Dolostone.

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Nucleotides are the monomers of DNA. They consist of five-carbon sugar deoxyribose, a phosphate group and a nitrogenous base attached to the sugar. Nucleotides including adenine A thymine T guanine G and cytosine C  are available.

DNA monomers or nucleotides can bind phosphates and sugars on the outside and nitrogenous bases on the inside where they can bind to other nitrogenous bases to form a ladder. DNA is a polymer. The monomeric units of DNA are nucleotides and the polymers are known as polynucleotides.

Monomers are small mostly organic molecules that can combine with other similar molecules to form very large molecules or polymers. All monomers have the ability to form chemical bonds with at least two other monomer molecules. The unique structure of DNA allows the molecule to replicate itself during cell division. When a cell prepares to divide, the DNA helix splits in the middle and becomes two single strands.

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The fish is a salt water organism. Its environment is hypertonic to its cell causing water to leaves its cell via osmosis The fish release small amount of dilute urine to maintain homeostasis. The correct option is B.

Oceans, lakes, rivers, streams, estuaries, and wetlands all have aquatic ecosystems. Fish, plants, and bacteria are just a few examples of the living species that can only exist in aquatic settings. Because of their vulnerability, these ecosystems are quickly upset by pollutants.

Aquatic habitats serve a variety of important environmental roles. They replenish groundwater, cleanse water, reduce floods, increase and maintain streamflow, offer habitat for wildlife, and provide people with recreational opportunities.

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The complete question is-

The imagine of a fish in its natural aquatic environment is modelled here . Examine the movement of water and ions shown by the model. Which statement describes the natural environment in which the fish is found based on the image shown here ?

A-The fish is a freshwater organism. Its environment is hypertonic to its cell causing water to leaves its cell via osmosis The fish release small amount of dilute urine to maintain homeostasis.

B-The fish is a salt water organism. Its environment is hypertonic to its cell causing water to leaves its cell via osmosis The fish release small amount of dilute urine to maintain homeostasis

C-The fish is a alkaline water organism. Its environment is hypertonic to its cell causing water to leaves its cell via osmosis The fish release small amount of dilute urine to maintain homeostasis

D-The fish is a distilled water organism. Its environment is hypertonic to its cell causing water to leaves its cell via osmosis The fish release small amount of dilute urine to maintain homeostasis

Answer:

the right answer is 10

Explanation:

Nucleus division and cytokinesis take place twice, first in meiosis I and again in meiosis II.

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The way that the respiratory and circulatory systems change throughout the day is that they work  together to supply the body with oxygen, the respiratory system collaborates directly with the circulatory system to do the above.

Poor food and lifestyle choices might make it harder for the respiratory system to work well. For instance, smoking can harm the tissues and cells in the lungs, which can make it exceedingly challenging for the lungs to release carbon dioxide and deliver oxygen to the body.

Note that in the process of their collaboration during the day, Inhaled oxygen travels into blood vessels where it is subsequently circulated to tissues and cells through the body's circulatory system.

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Answer: Urban sprawls are unsustainable.

Explanation: Urban environmental sustainability encourages the revitalization and transition of urban areas and cities to improve liveability, promote innovation and reduce environmental impacts while maximizing economic and social co-benefits. Urban systems are inherently complex. Urban sprawl has significant environmental, economic and social consequences. It leads to higher emissions from road transport and loss of open space and environmental amenities.

Answer: No

Explanation:

Urban sprawl is the expansion that refers to a complex pattern of land use, transportation, and social and economic development usually as a direct effect of population growth on a national level. Urban sprawl is not sustainable for the environment because it creates an increase in water and car usage increasing air pollution, and creates a loss of agriculture capacity of the land. This increase in air pollution and loss of agriculture and woodlands leaves no plants able to create oxygen to sustain a thriving ecosystem. While some may argue that Urban sprawl helps create a better economy, better employment, and better living conditions, in terms of Biology, Urban sprawl is a leading cause of the destruction of our ecosystems.

True  his hypothesis, Jake should use the same of amount of water and aspirin for each of the plants in the experimental group.

Biology is the study of living organisms, both extant and hypothetical. Because information in other animals' genetic make-up may contain information about our own, it is crucial to research it. Since an amoeba has just one cell, it is an organism.

When two atoms exchange or contribute their electrons, an ionic connection is created. Atoms can be attracted to one another by van der Waals forces. The electrons are always drawn to both atoms in an ionic connection equally. The process by which atoms or groups of atoms in the compounds are restructured into new substances is known as a chemical reaction.

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Answer:

The scapula is a crucial bone for the shoulder joint's proper operation. It engages in six different motions, including protraction, retraction, elevation, depression, upward rotation, and downward rotation, enabling full-functional movement of the upper extremities.

The scapula is a crucial bone for the shoulder joint's proper operation. It engages in six different motions, including protraction, elevation, retraction, depression, upward rotation, and downward rotation, all of which enable full-functional movement of the upper extremities.

A triangular bone called the scapula, sometimes referred to as the shoulder blade, connects the clavicle and the humerus. This bone is situated behind. The stability of the other bones involved in the rhythm of shoulder motion is greatly aided by the scapula.

The scapula covers the posterior upper chest, including the underlying nerves and blood arteries, in addition to supporting the other bones involved in rotating the shoulder.

These are a few potential reasons of scapula pain: damage to the bones supporting the scapula or to the shoulder joint. slinging strapped luggage over the shoulder. repetitive arm actions, such as swimming, throwing, and racquet sports.

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Answer:

through water

Explanation:

water helps to get energy of anything deal with air

The outcome when two elements are chemically combined is a compound and is based on different types of bonds.

This is referred to as a substance which is formed as a result of the combination of two or more elements  through the various types of bonding.

An element needs to achieve a stable octet configuration which is why they donate or accept electrons. An example of a compound is Sodium chloride which is formed from the reaction between Sodium and chlorine in  which Sodium donates one electron to chlorine which accepts it and forms the compound named above.

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Active transport always involves the utilization of cellular energy, whereas passive transport does not requires cellular energy.

Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.

Passive mechanisms like diffusion use no energy, while active transport requires energy to get done. key differences also include Passive transport moves molecules with the concentration gradient (high to low), while active transport moves molecules against the concentration gradient (Low to High).

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The particles are compressed, closer together, and collide more frequently, energy is transferred during collisions.

Because of the tighter spacing between particles, particles move quickly in all directions but collide more frequently than in gases. Because the particles gain kinetic energy as the temperature rises, they move faster, increasing the likelihood of collisions and diffusion.

A solid is made up of very closely spaced-apart particles. Each particle is firmly anchored in situ and is limited to stationary vibration. Many solids contain particles that arrange themselves into crystals in a predictable, repeating pattern.

The molecules will travel quicker and are more likely to collide with one another if there is more energy available to them. Higher temperatures should result in more molecule-to-molecule collisions and more frequent chemical reactions.

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It signifies that, to a best of knowledge, the hypothesis is false since there is a lack of adequate objective facts to support it.

Hypothesis- Professionals frequently express hypotheses in if/then statements, e.g., if someone consumes a lot more sweets, then they will have cavities through their teeth. These claims list particular factors and make predictions about the outcomes. In this instance, the sugar content is the variable, and cavities are the outcome.

How to Write a Research Hypothesis 

1. How to Write a Research Hypothesis 

2. Avoid using unnecessary words and keep it simple.

3. Without any ambiguity or presumptions of the readers' expertise, it is clear.

4. Measurable outcomes that can be tested.

5. Relevant and pertinent to the study subject or issue.

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Answer:

I do believe the answer i true im lerning this currently so i do think this is true

Explanation:

It is not accurate to call a virus that kills bacteria a "bacteria eater" as it does not technically eat bacteria but infects it. The virus that enters a cell replicates it's genome inside it causing the cell to be infected with it.

Bacteriophages, or simply phages, are viruses that infect and kill bacteria. Bacteriophage is a name that means "bacteria eater." Although theoretically speaking, viruses don't consume anything, they do kill the bacteria and other infected cells. They have been demonstrated to successfully combat and eradicate multi-drug resistant bacteria and are the most prevalent biological organisms in nature.

Virus particles infiltrate host cells. Once a viral particle penetrates a host cell, its nucleic acid component or it's genome disrupts the processes of the cell, essentially taking over the host cell's proteins and other components to produce new viral particles.

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Original signed consent documents include provisions for recontacting subjects it is appropriate to re-contact the individuals who provided biological specimens.

A biological specimen, also known as a biospecimen, is a laboratory specimen used in biology that is kept by a biorepository for research. A sample of such a specimen would be taken from the specimen's source in order to make it representative of all other samples taken from the same source. For research purposes, it is preferable for biological specimens to be preserved so that they maintain their comparability to newly-collected specimens.

Blood, urine, saliva, and a variety of other biological specimens (or biospecimens) are taken from patients as part of routine patient monitoring and care as well as for use in basic, clinical, and epidemiologic research investigations.

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The expression “wearing gloves” and “taped fingers” might represent in a real enzyme reaction because the active site of enzymes can adopt these shapes during substrate binding.

The enzyme's active site is a domain in the enzyme that binds to the substrate in order to convert it into one or more products during an enzymatic reaction. The enzyme's active site can adopt the form of fingers in zinc finger domain enzymes.

Therefore, we can conclude that the enzyme's active site of an enzyme may have a zinc finger domain that acts as “wearing gloves” and “taped fingers” during binding.

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Assuming the radius of the cell is given as r, to calculate the volume and surface area of a cell, the formula below is used;

Cells are the basic structural and functional unit of life.

Cells are what all living organisms are made up of.

Organisms that are made up of only one cell are said to be unicellular whereas organisms that are composed of multiple cells are said to be multi-cellular.

To calculate the volume and surface area of a cell, it is assumed that the cell is a sphere. This is because most cells when placed in a liquid medium or suspension, they exert equal forces in all directions, which results in the cells assuming a spherical shape.

To measure the radius of the cell, the cell is placed in a suspension and then viewed through a microscope at a know magnification. The radius of the cell is then taken.

The radius of the cell obtained is then used to calculate the volume and surface area of the cell.

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Explanation: Human cheek cells stained and mounted in glycerine were observed with the help of a compound microscope. The stain that could be used is Methylene blue. Methylene blue stains negatively charged molecules in the cell, including DNA and RNA.

The components of the cell which would be seen are the nucleus, plasma membrane, and cytoplasm.

While bases take protons in processes, acids donate protons (H+). While bases have a pH of 7 or higher, acids have a pH of 7.

While bases take protons in processes, acids donate protons (H+). While bases have a pH of 7 or higher, acids have a pH of 7. Acids release H+ ions while bases release -OH when they separate in water. While acids render litmus paper red, bases turn it blue.

1) In Experiment 1, the color of the solution changes from light (suggesting base) to dark when the acid is introduced (suggesting acid). As a result, adding the acid in this instance produced an ACIDIC solution.

2) In Experiment 2, the reverse is accurate. The hue stays light even after the addition of the acid (suggesting base). The outcome in this instance is BASIC as a result.

3) When the acid is given to the base to buffer it, this is Experiment 2. As you recall, a buffer solution is one that doesn't alter in pH when an acid or basic is introduced. We may infer that the addition of the acid in Experiment 2 was made to produce a buffer solution because it was done so the pH didn't fluctuate as much as it did in Experiment 1.

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The organism that has a nerve net that allows it to a stimulus in a coordinated way is called option C: Hydra.

The majority of cnidarians, including those in the genus Hydra, contain what is known as a neural net, which is an organism-wide network of distinct and individual nerve cells and fibers.

Hydra species have two nets, one attached to the gastrodermis and the other situated between the epidermis and the muscles.

Invertebrate freshwater animals of the genus Hydra belong to the class Hydrozoa. Such an organism has a thin, transparent tube for a body that can grow up to 30 millimeters long but can also contract significantly.

Therefore Hydra have nerve net that is used respond to the touch of physical contact as well as other functions.

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See options below

a. clam

b. earthworm

c. hydra

d. shark

The particles which forms sedimentary rocks usually contains calcite or quartz.

The composition of a substance are what the substance is made up of. Within the context of this question, before the sedimentary rocks are formed, the layers of the its constituents which when subjected to high temperature and forms sedimentary rock contains a substance known as quartz. This quartz is also known as the siliciclastic rocks.

However, the layers or substance or particles which forms sedimentary rocks also contains the carbonate rocks also known as calcite.

There are three major types of rocks:

So therefore, the constituents which makes up sedimentary rocks contains calcite and quartz.

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Answer:

can contain the remains of plants, animals, or both.

Explanation:

i did it for study island, your welcome

Answer: The acid weather the rock away

Explanation: Air pollution have sulfur and carbon which react with water and becomes acid rain.

It is possible to observe the night sky without any special equipment, while a sky chart and a good telescope or pair of binoculars can enhance some observations and make some otherwise invisible objects visible.

The Milky Way, our galaxy, is made up of the stars we see at night in a dark sky. The Sun is one of the many stars that make up the Milky Way. The Sun isn't extremely brilliant compared to other stars, but because of how near it is to Earth, it appears incredibly bright to us.

You can see your stars in one of three ways. One can observe the stars with their eyes, binoculars, or telescopes.

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Answer: D. Theodore Roosevelt

Answer:

The respiratory system is responsible for breathing