Which steps are involved in desalination of water? Check all that apply. Salt is removed from ocean water to provide fresh water. Water is heated until it evaporates. Water is condensed and collected. Water is transported from one area to another area that has little water. Water is collected and salt allowed to settle at the bottom.

The term semipermeable means to allow some substances through and prevent others from passing. The cell membrane is semipermeable because it prevents harmful toxins from entering and damaging the cell. At the same time, the cell membrane allows nutrients and other helpful substances through. In this way, the cell membrane is like a security guard of the cell.

The letter A (option B) represents the stroma in which Calvin cycle or dark reactions of photosynthesis.

The fluid-filled interior area of the chloroplasts that surround the grana and thylakoids is known as the stroma.

Along with the ribosomes, starch, and chloroplast DNA, stroma also has the Calvin cycle-related enzymes.

The letter B indicates the space between the two membranes of chloroplast known as the intermembrane space.

Letter C indicates the thylakoid that are disc shaped membrane bound compartment in the chloroplast.

Letter D indicates a granum which is a stack of thylakoid.

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2nd option, Genetic variation will increase because of a new habitat and food source

Tons of food (rodents) and they would have no competition for the rodents in the new habitat

Answer:

The correct answer is the 2nd statement.

Explanation:

Genetic variation signifies the naturally taking place genetic differences, which prevails between the individuals of similar species. Genetic variation is essential as it permits the individuals to thrive better in a given surrounding.  

In the mentioned case, when the snakes enter a novel habitat, they came across a condition where there are lesser natural predators and because of this they had enough food and less competition. Therefore, no selective pressure is exhibited to affect genetic variation.  

Additionally, in the availability of enough food and non-existence of competition, the genetic variation will only enhance. Thus, in the mentioned case, the genetic variation of the snakes enhances because of the food source and new habitat.  

The main difference between ionic and covalent bonds is the sharing of electron pairs and atoms. In covalent bonds, atoms are attracted towards each other while in ionic bonds; electron pairs are shared between atoms.

All of the above (but if you want to distinguish DNA from RNA, it’s thymine)

Answer:

Thymine

Explanation:

Edge2020

An obstruction between the interior of the cell and its external environment is the cell membrane. The tendency of a molecule to pass through a cell membrane relies on its charge, concentration, and size.  

Certain of the polarized molecules are so small that it can pass through the cell membrane, for example, let us consider a polarized molecule like water, whose small size permits it to diffuse freely through the cell membrane.  

Other molecules, like that of oxygen, which exhibits no polarity and is small enough to readily pass through the cell. The molecules of sugar that comprise five or more atoms of carbon, are too large to pass via the cell membrane and need to be mediated with the help of transmembrane proteins.  

Answer:

1 color

2 C

Explanation:

Sleet formation involves raindrops falling through a cold layer of air near the ground, turning into ice pellets before reaching the surface. The correct image would show this process sequentially from above the ground to contact with the ground.

Without the provided images, it's important to understand what the process of sleet formation entails. Sleet refers to a form of precipitation that occurs when raindrops fall through a layer of freezing air near the ground, turning them into small ice pellets before they reach the surface. The image that correctly depicts the formation of sleet would typically show a sequence where the raindrop freezing process begins above the ground and completes before the drops hit the ground. Various stages of the freezing process should be clearly illustrated.

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Answer:

gene for sweeter fruit

The answer is option B:

X: Enzymes

Y: Gene for sweeter fruit

The labels that should be used to complete the diagram are 'X: Enzymes' and 'Y: Gene for sweeter fruit'. Enzymes are involved in modifying the apple tree DNA, and the gene denoted as Y is responsible for the desired trait of sweeter fruit.

The labels that should be used to complete the diagram are:

X: Enzymes

Y: Gene for sweeter fruit

This represents the process of genetic modification, where enzymes are used to insert a specific gene (for sweeter fruit) into the DNA of an apple tree.

Enzymes are biological molecules that catalyze chemical reactions, and in this process, enzymes are involved in modifying the apple tree DNA to produce sweeter fruits. The specific gene responsible for the desired trait of sweeter fruit is denoted as Y.

The advancement in medicines, industry and education positively affected the birth rate by declining the death rate and hence the overall growth of the population.

The Population may be defined as the groups of individuals belonging to the same species living in the same area at a definite time. The size, density, birth rate, death rate, dispersal, etc. are some of the characteristics of the population. These factors are known as demographic factors.

The advancement in medicines, industry and education significantly increases the mode of information and aspects of living to the people. It increases reproductive health that enhances the number of offspring from the individuals. Along with it, people must be passively aware of all their strategies, parental care, and perspective on the new born child.

Therefore, the advancement in medicines, industry, and education positively affected the birth rate by declining the death rate and hence the overall growth of the population.

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Advances in medicine, industry, and education have affected birth rates, death rates, and population growth through factors such as improved healthcare, contraception, and education empowerment.

Advances in medicine, industry, and education have had a significant impact on birth rates, death rates, and population growth. The development of modern medicine and health services has led to a decrease in death rates, particularly in children, which has resulted in more children surviving to adulthood and an increase in birth rates. Additionally, improved education, especially among women, has led to empowered reproductive choices and the use of contraception, contributing to lower birth rates. These factors, along with improved living conditions and economic factors, have influenced population growth rates.

The correct answer would be option B

The rate of photosynthesis in the plants during the dark(night) slows down but the process of cellular respiration does not depends on the light to take place.

The snail and the plant produced carbon dioxide by the process of cellular respiration at night but it was not consumed by the plants by the process of photosynthesis.

Due to this, carbon dioxide got accumulated in the solution and turned the solution more acidic ( solution turned from blue to yellow).

Final answer:

Test Tube D showed more acidity (yellow color) in the dark setup due to the decrease of photosynthesis in the absence of light, while respiration continued, resulting in higher CO₂ levels and an acidic environment.

Explanation:

The correct answer to explain the change in Test Tube D from the light setup to the dark setup is B) The rate of photosynthesis decreased in the dark, thus the elodea used less CO₂. The elodea and snails continued to produce CO₂ through cellular respiration, raising the level of CO₂ in the tube, causing the solution to become more acidic (yellow).

In the presence of light, elodea performs photosynthesis, utilizing CO₂ and releasing O₂. At the same time, both elodea and the snail respire, which consumes O₂ and produces CO₂. However, during the dark, photosynthesis does not occur because light is a necessary component for the process of photosynthesis. Nevertheless, both organisms continue to respire in the dark, contributing to the increase in CO₂ levels that leads to a more acidic environment indicated by the yellowing of the bromothymol blue solution.

The energy role of a grizzly bear is that of a consumer because it cannot make its own food.

Grizzly bears are considered heterotrophs as they derive their energy from consuming other organisms, both plants and animals. They depend on the environment for food, and not on photosynthesis. A distinct energy-related physiological process observed in grizzlies is hibernation during which they depend on stored fat for energy.

The energy role of a grizzly bear is that of a heterotroph because it cannot make its own food. In biology, animals that cannot produce their own food are termed as heterotrophs. They derive their energy from external food sources. Grizzly bears, as an example, are omnivores and consume both plants and animals for sustenance. Thus, they depend on the environment to provide them with nourishment rather than photosynthesizing, similar to plants or certain microbial organisms.

Another important life cycle aspect of grizzly bears related to their energy consumption is hibernation. Before winters, they enter a phase of hibernation during which they rely on their stored fat reserves for energy. This process is not just random; there are certain environmental cues that trigger this physiological change in grizzly bears. Hibernation allows them to survive through winters when food resources are scarce.

Bears that encounter humans for food sources are more inclined to intrude human habitations, indicating an adaptive behavior in search of energy (food) sources.

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its low in carbohydrates :)

Answer: It is low on carbohydrates (C)

Explanation:

Answer:

Ions are moved against the concentration gradient.

Explanation:

Active transport mechanisms require the use of the cell's energy, usually in the form of adenosine triphosphate (ATP).

Because active transport is not passive and requires molecules to move against a concentration gradient, it requires energy. Thus, the carrier protein needs energy to transport it. Energy in the form of ATP must be used for it.

In order for cells to acquire molecules or ions from the environment in opposition to the concentration gradient, active transport is a crucial activity.

On the other hand, metabolic products or electrolytes that are substantially loaded into cells might be expelled in opposition to the concentration gradient.

In the face of these passive variations, active transport keeps concentrations of ions and other chemicals required by live cells constant.

Therefore, The usage of the cell's energy, often in the form of adenosine triphosphate, is necessary for active transport processes (ATP).

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I think that they both measure energy

Answer:

1. They both measure energy

Explanation:

A calorie is a unit of energy, it represents the quantity of energy that is needed to elevate the temperature of one gram of water by one celcius degree. Is commonly used in nutrition as well as physics.

I hope you find this information useful and interesting! Good luck!

I believe your answer is C)High temperature due to other layers keeps the particles close together.

sorry if im wrong

Answer:

The answer is B: High pressure due to other layers forces the particles to stay closer.

Explanation: Scientists believe the intense pressure of the other layers pushing down on top of it forces the inner core to remain a solid.

Photosynthesis takes in the carbon dioxide produced by all breathing organisms and reintroduces oxygen into the atmosphere. Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy

Dune grasses have extensive root systems that anchor them firmly into the sand, helping to prevent erosion even in high winds and shifting sands.

For the most part the birds will be negatively affected by the early spring, they won't have the food they need and because they missed finding ideal nesting spot one of two things will happen, they will either pick an unsafe nesting area which can result in their young being hurt or even themselves, and/or they won't breed at all and because of this the Warbler population will decrease due to low mating rates. Eventually, the birds will evolve in a way and start coming back from their migration earlier than previous generations and thus they will have access to the food and nesting areas that they need and the population will spike again.

I hope this helps you out a little!

Answer:

Populations will decline since individuals will be less likely to successfully reproduce. Hope this helped

Explanation:

I think it would be  a c shaped backbone

28. Answer: All mutations do not affect the organisms due to the following reasons:-

1. The DNA consists of both coding and non coding regions. The coding regions are known as exons and non coding regions are called as introns. The non coding regions do not make up the protein. Thus, if the mutations occur in non coding regions they do not affect the organism.

2. There are some mutations that result in the change of the codon but the new codon formed codes for the same amino as the previous one. This is possible because of the degeneracy of genetic code. For eg, AAA codes for lysine, however if the mutation changes this code to AAU then this also codes for lysine. Such mutations are called as silent mutations.

3. There are some mutations which result in the change in amino acid however the new amino acid formed is similar to the previous one in its properties for e.g leucine and isoleucine. Such mutations are called as neutral mutations and they do not affect the organism

29. Answer: 1. The process of mitosis results in the formation of two diploid cells whereas meiosis results in the formation of 4 haploid cells.

2. The process of mitosis takes place to produce copies of the body cells whereas the process of meiosis takes place to produce the gametes.

Explanation:-

29. Answer:

Pros

1. Genetic engineering helps us to tackle several diseases. There are many diseases which are caused due to genetic mutations. Genetic engineering helps us to rectify these mutations and hence combat such diseases.

2. Genetic engineering helps us to produce new foods which can withstand adverse conditions such as high/low temperatures, low rainfall, are disease and pest resistant etc. This, genetic engineering helps to significantly improve crop production.

Cons

1. Genetic engineering leads to a decrease in genetic diversity.

2. It can lead to a decrease in the nutritional value of food as genetic engineering often causes an accelerated growth of animals and hence, the nutritional valie of poultry foods is compromised.

Answer:

Option C, The relative dating was done incorrectly.

Explanation:

As it is mentioned here in the description that scientist know that the actual age of rocks must be 2.5 billion years and this age of the rock must have been derived through some methodology of radioactive dating. Now since the potassium-argon method was used three times and it depicted the same result every time stating that the age of rocks is 1.3 billion years. Therefore there are high chances that earlier method used that estimated the age of rock as 2.5 billion years must be wrong.

some one celled organisms reproduces by binary fission which is a process of cell division. The answer is 4.

The answer is D) incomplete dominance

I would say true, because both abundant thick vegetation and there are 3 known types of grasslands, also that many diffrent species of animals live on the grasslands.

Gymnosperms produce male and female cones while angiosperms produce stamens and pistil in the same flower as the male and female reproductive parts. ... In angiosperms, pollen grain is transferred from the anther to the pistil by wind, insects oranimals by the attraction to flowers.

The process of transfer of pollen grains from the male reproductive structure to the female in gymnosperms and angiosperms is known as pollination. Pollination occurs through different agents.

Pollination is the process which includes the transfer of pollen grains (male gametophyte) from the male reproductive structure (anther) to the female reproductive structure (stigma). This is an important step of reproduction in plants.

Gymnosperms produce male and female cones while angiosperms are the plants which produce stamens and pistil in the same flower as the male and female reproductive structures. In angiosperms, the pollen grain is transferred from the anther (male gametophyte) to the pistil (female gametophyte) through the help of different agents called pollinators such as wind, insects or animals by attraction to the flowers.

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Answer:

Your correct answer is B) not A)

Explanation:

Here's why:

Sean, a graduate student, is attempting to repeat a published experiment. He does not find the same results that the authors found. This could be the result of Sean's scientific error.

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The swelling and possible bursting of the cell is a result of which biological process? Osmosis

Explanation:

Monosaccharides are defined as the simplest form of carbohydrates. It consists of carbon atom, hydrogen atom and oxygen atom.

In disaccharides and polysaccharides, monosaccharides are the basic building blocks.

As two units of a monosaccharide leads to the formation of a disaccharide. Similarly, more than two units of a monosaccharide will lead to the formation of a polysaccharide.

Basic formula of a monosaccharide is [tex](CH_{2}O)_{n}[/tex], where n can be equal to or greater than 3.