Which of the following is a risk of
being underweight?
A. Starting to develop arthritis
B. Increased possibility of stroke
C. Poorly functioning immune system
D. Becoming more susceptible to heart disease

Answer:

D. Designing experiments

Explanation:

Scientists get understanding of the world by performing experiments. Direct conclusion without any data is considered as irrelevant. The scientists design the protocol of the experiment and performs it accordingly to get the data and then infer the result from it.

The experiments are designed on the basis of the hypothesis being stated. The hypothesis is validated by the experiments and has to be altered or withdrawn if the results do not support the hypothesis.

for plants, Instead of breathing oxygen, they suck in carbon dioxide and release oxygen in the atmosphere.

Answer: Tomato plant is a multicellular organism.

Explanation: A multicellular is a organism composed by many types of cells or cell lines. A tomato plant is composed not only by million of cells but by many types of them in the different tissues and organs, for example, leaves have epidermic cells that protect them, stomata cells for gas exchange, chlorenchyme cells that have chloroplasts to do photosynthesis, phloem and xylem cells to transport fluids, etc.

In a complex carbohydrate molecule, the ratio of carbon to hydrogen to oxygen is 1:2:1. Therefore, if there are 12 carbon atoms, there will be 24 hydrogen atoms and 12 oxygen atoms.

Given that carbohydrates can be represented by the stoichiometric formula (CH₂O)n, where n is the number of carbons in the molecule, the ratio of carbon to hydrogen to oxygen in carbohydrate molecules is 1:2:1. Thus, if a molecule of a complex carbohydrate is made of 12 carbon atoms, the number of hydrogen atoms will be 2*12 = 24, and the number of oxygen atoms will be 1*12 = 12. This is because for every one carbon atom, there are two hydrogen atoms and one oxygen atom.

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Answer:

heterogeneous

Explanation:

it's a heterogeneous mixture called a colloid.

Answer:

A. the sun

Explanation:

Answer:

A. the sun

Explanation:

Water cycle -

Water cycle represents that , the evaporation process of the water from the surface of the Earth , and as it rises in to the atmosphere and then condense down and comes back to the surface of Earth , in the form of rain , snow fall .

The very first step , i.e. , the evaporation of the water , is done with the help of the energy of sun .

Because , sun provide the energy to convert the water to water vapor .

Population density is found by dividing population by land area. This calculation gives the average number of persons per unit area. The population densities for each listed country were calculated.

Population Density Calculation

Population density is calculated by dividing the population of an area by its land area. The land area should be in same unit for all calculations to keep the comparison valid. Here are the population densities:

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The answer should be the third option "number of protons and neutrons." The atomic mass of a element is equal to the amount of protons, and neutrons added together in that element. So for example if we are trying to find the atomic mass of hydrogen you would add the total amount of protons and neutrons together to find it's mass although it doesn't equal the exact amount of it's mass but it's close.

Hope this helps.

Answer:

Metabolic processes will become uncontrolled.

Explanation:

Enzymes play very essential role in metabolic processes. They transfer electrons from one molecule to another and assist as cell in regulating the extent of anabolic and catabolic processes taking place with in a cell. Thus, if enzymes stops functioning or stop regulating the chemical traffic through pathways of metabolism then the metabolic processes will either not start and in case if they already started, then will not inhibit and remain in the stage of continuation.

The fossil record gives evidence of extinct species. The fossil record shows that organisms always remain the same. Which best describes how the fossil record is

Answer:

The definition of a fossil record is a section of fossils which has been analyzed and organized chronologically and in taxonomic association.

The items that best describes the fossil record are:

1. comparative anatomy

2. radiometric dating

3. DNA analysis

Answer:

Water passes through the membrane in a diffusion process called osmosis. During active transport, energy is expended to assist material movement across the membrane in a direction against their concentration gradient. Active transport may take place with the help of protein pumps or through the use of vesicles.

Explanation:

Answer:

This is because fluids have a polar nature, so they couldn´t cross the lipidic bilayer that constitutes the plasma membrane

Explanation:

Plasma membranes are contituted by lipid bilayers. These kind of compounds are hidrophobic (they reject water) and don´t permit the freely passage of hidriphilic molecules that can disolve in water, constituing fluids. Because of that cells developed transport mechanism like endocytosis.

Answer:

While the heads of the phospholipid structure attract water, the tails are hydrophobic. The model shows how the hydrophilic section folds around the fluid molecules to bring them into the cell so they don’t need to pass through the hydrophobic tails.

Answer:

The glycosidic  linkage between glucose molecules in maltose is α-1,4-glycosidic linkage.

Explanation:

As maltose is a reducing sugar, it must possess the linking of its two glucose molecules in such a way that an anomeric carbon is left for the the formation of an aldehyde group. The glucose molecules in maltose are linked in such a way that the first carbon atom of one of the glucose molecules is attached to the fourth carbon of the other glucose molecule. This is known as head to tail fashion and termed as α-1,4-glycosidic linkage.

Answer:

D

Explanation:

Since Adenine (A) pairs with Uracil (U) in RNA, Thymine(T) pairs with Adenine but Adenine doesn't pair with Thymine in RNA and Guanine(G) and Cytosine(C) then the nitrogenous pairs would be like this.

GCATTA

CGUAAU

The corresponding mRNA strand would be: CGUAAU. Therefore, option (D) is correct.

mRNA stands for messenger RNA. It is a type of RNA molecule that carries genetic information from DNA to the ribosomes, where it serves as a template for protein synthesis. mRNA is transcribed from DNA during the process of gene expression and is crucial for protein production in cells.

To determine the strand of mRNA produced from a given strand of DNA, we need to apply the complementary base pairing rules. In DNA, the bases are adenine (A), thymine (T), cytosine (C), and guanine (G). In RNA, however, thymine is replaced by uracil (U). The complementary base pairs are A-T and G-C in DNA, and A-U and G-C in RNA.

Given the DNA strand: GCATTA

To transcribe it into mRNA, we replace each DNA base with its complementary RNA base:

G -> C

C -> G

A -> U

T -> A

T -> A

Therefore, the corresponding mRNA strand would be: CGUAAU

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Answer:

The correct answer is - ionic bond.

Explanation:

Ionic bonds are the bonds that are formed when an atom transfer its electron to the other atom and forming ions that become electrically charged that attracts each other and form bond between them.

Given the picture showing the ionic bond formation as sodium transfers one electron to the chlorine ion and becomes electrically charged and therefore electrically attracted to one another to form an ionic bond.

Thus, the correct answer is - ionic bond.

Answer:

The conservation of endangered species is important for humans as well. A well-balanced ecosystem purifies the environment, giving us clean air to breathe, a healthy water system to support diverse marine life, and arable land for agricultural production.

Explanation:

The health of an ecosystem is maintained by its plants and animals. When species become endangered, it is a sign of an ecosystem's imbalance. This balance is difficult to maintain: the loss of one species often triggers the loss of others. ... By saving endangered species, we are ultimately saving ourselves.

The conservation of endangered species is important for maintaining biodiversity and ecosystem balance, with public support enabling increased conservation efforts. However, there are concerns about the allocation of resources, effects on ecosystems, ethical considerations, and public perception related to de-extinction efforts. Finding a balance in conservation resources is essential to ensure the most effective protection of biodiversity.

The conservation of endangered species serves crucial roles in maintaining biodiversity and the balance of ecosystems. Efforts to protect endangered species with large territories, like the northern spotted owl, Strix occidentalis caurina, often result in the protection of other species within the same ecosystem, improving the efficiency of conservation resources. Additionally, certain ecosystems with high concentrations of endangered species, such as the Florida scrub or Hawaiian rainforests, benefit almost equivalently from species-oriented conservation and ecosystem conservation efforts. Public support for protecting charismatic species like the whooping crane (Grus americana), the giant panda (Ailurapoda melanoleuca), and the golden lion tamarin (Leontopithacus rosalia) is high, which can translate to increased funding and attention to conservation efforts.

However, there are cons to focus exclusively on endangered species conservation. The argument against de-extinction efforts is that they are expensive, technically challenging, and may divert necessary resources from protecting species currently facing extinction. Concerns also arise about the potential impact of resurrected species on ecosystems, as they may not fulfil the same roles or exhibit the same behaviours as their pre-extinct counterparts, possibly introducing new threats. Ethical questions surround the concept of humans playing god with the natural order. The potential for public desensitization to the extinction crisis is another critique: if people believe that extinct species can simply be revived, the urgency to protect species might diminish.

In conclusion, while the conservation of endangered species has many benefits, including ecosystem protection, there are debates regarding resource allocation, especially concerning de-extinction efforts. Conservationists face the challenge of finding a balance between preserving endangered species and ensuring the efforts do not outweigh the potential benefits to biodiversity and ecosystems.

Answer:

The solution is hypotonic

Explanation:

The salt concentration in the solution is lower  (0.05%) than the concentration of salt inside the cell (2.0%)

Answer:

Yes.

Explanation:

In the tropical Pacific, like the western coast of central and south America, the surface of the sea is cooler than normal and that results in reduced rainfall, drought and increased fires. This definitely brings about a negative effect on wildlife, as there is less water and food available.

However, in South East Asia, a higher than normal rainfall is commonly experienced, which is good for agriculture.

Final answer:

A La Niña event, characterized by cooler Pacific Ocean water, affects global weather and ecosystem dynamics. Marine wildlife may benefit from increased nutrient availability, while terrestrial wildlife could be stressed by altered weather patterns. The overall impact on wildlife is complex, with some species benefiting and others facing challenges due to ecosystem fluctuations.

Explanation:

A La Niña event, which is a period when the Pacific Ocean is cooler than usual, has significant impacts on global weather patterns and consequently on wildlife. During La Niña, stronger trade winds blow across the Pacific, leading to a buildup of cooler water in the western Pacific compared to normal years. These cooler ocean temperatures can affect global weather patterns, potentially leading to more intense storms in some regions, droughts in others, and fluctuations in marine ecosystems.

For instance, marine wildlife is impacted by changes in ocean temperatures and currents. A cooler ocean can lead to an increase in upwelling, which brings nutrient-rich waters to the surface and can boost plankton populations. This effect can lead to a more abundant food supply for fish and other marine organisms, potentially increasing their populations. However, terrestrial wildlife may experience stress due to altered weather patterns, such as increased rainfall or drought conditions, which can affect their habitats and food availability.

Moreover, La Niña can influence the migration patterns of birds and marine animals, as they respond to changes in food availability and habitat conditions. Additionally, the populations of prey species can fluctuate, affecting predators and the overall ecosystem balance. It's important to note that while some species may benefit from the conditions brought about by La Niña, others may face greater challenges. Overall, wildlife impact during La Niña events is complex and varies across different ecosystems and species.

Individual organisms do not evolve; instead, evolution is a process that occurs across generations within a population. While individual organisms can adapt to their environment, these adaptations do not equate to evolution. Examples of evolution include the genetic changes leading from pre-humans to modern humans.

Can an individual organism evolve? No, an individual organism itself cannot evolve. Evolution is a process that occurs over many generations within a population, not within the lifespan of a single organism.

When we talk about evolution, we refer to the genetic changes that accumulate in a population over time. These changes can lead to new species, but they do not alter the genetic makeup of an individual once it is born.

Examples of Evolution

For instance, consider the transformation from pre-humans to modern humans (Homo sapiens). This was not a change that occurred in a single individual but rather a series of genetic adaptations across countless generations.

Adaptations vs. Evolution

It's important to differentiate between an organism adapting to its environment and evolution. An individual organism can adapt by developing better skills for survival, but this adaptation is not the same as evolution. Evolution requires the genetic changes that happen across multiple generations, leading to the emergence of new species.

Organisms interact with their environment, which can influence their success and survival.

Populations, not individuals, evolve over time through the accumulation of genetic changes.

Examples of evolution include the transition from dinosaurs to birds and pre-humans to modern humans.

Final answer:

To avoid future costly mistakes like the loss of the Mars Climate Orbiter due to confusion between English and metric systems, enforce universal adoption of the metric system, implement thorough checks and balances, and enhance team communication on units.

Explanation:

In 1999, confusion between the use of the English and metric systems resulted in the loss of the Mars Climate Orbiter, a spacecraft designed to study Mars' water history. To avoid costly mistakes like this in the future, several measures can be implemented. First, enforcing a universal adoption of the metric system in all space missions to prevent unit conversion errors. Second, incorporating thorough checks and balances in the engineering process to ensure that all data, including units of measurement, are correctly applied and converted when necessary. Lastly, enhancing communication and collaboration among diverse engineering teams to make sure everyone uses a consistent unit system. The failure of the Mars Climate Orbiter serves as a valuable lesson on the importance of attention to detail in engineering calculations, especially in units and dimensions.

Answer:

protiens and enzymes

This question has a mistake. Here is the correct question:

Which molecule can pass freely through the lipid bilayer ?

Answer:

The correct answer is Lipid-soluble molecules.

Explanation:

In order for a cell to survive, it must receive nutrients and oxygen from the outside that will be transported to them by means of a single cell.

For this to happen, each molecule must pass through a lipid bilayer which is responsible for forming membranes.

Not all molecules can achieve this, but only those that can dissolve in lipids and some small ones will get through this bilayer, leaving out large molecules and ions.

Answer:

Each parent organism contributes one copy of its alleles in a seemingly random fashion to its offspring, as meiosis to create gametes (egg or sperm cells) reduces the number of genes by half. Therefore, each gamete contributes only one allele.

Explanation:

During meiosis process each parent contribute haploid gamete with an alleles for a specific gene in a random fashion to its offspring,  Therefore, each gamete contributes only one allele.

Alleles are the forms of a gene which carry a trait, it is present in a pair in a specific location on a particular chromosome and control the same trait.

Alleles of an organism makes the genotype.

If a pair of alleles are similar for a trait, then the genotype is homozygous.

If the pair of alleles are different for a trait, then the genotype of the organism called as  heterozygous.

Similarly in a heterozygous genotype, the allele which express its character called dominant allele and the other one which wont express called recessive allele.

For example, the human blood group ABO.

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The question was incomplete. The probable question was

1. Explain why it's unknown which of two alleles an offspring will obtain from its biological mother or father for a given characteristic. 2. Reginald Punnett sought to apply the insights obtained by Mendel to explain the laws of inheritance in a structured fashion. What's a Punnett square and how is it used? 3. You're conducting a science experiment crossing two different purebred mouse strains, which each contain a different variation of the same gene, for two generations. What do you expect to see as the phenotypes of the first generation? The second generation? 4. How closely do Mendel's insights into dominant and recessive traits match up with the ratios that Punnett calculated in his Punnett squares?

Answer:

c. it can only be produced in windy areas.

Explanation:

Answer:

Amazon Jungle

Explanation:

The locations would most likely have the least wind erosion is amazon Jungle.

The biggest tropical rainforest in the world, the Amazon is still renowned because of its biodiversity as spans much of northeastern Brazil as well as Colombia, Peru, and other South American nations.

The method of separating soil, rock, and dissolving material from one area on the Earth's crust and moving it to another, where it would be deposited, is often known as erosion.

Therefore, the locations would most likely have the least wind erosion is amazon Jungle.

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Answer:

How has a polar bear adapted to its Arctic environment? Their white fur helps them blend in with the snow and ice. A polar bear has a layer of fat under its skin which helps it stay warm. It also has a thick layer of fur.Inhabiting the ice and sea of the Arctic, polar bears are well-equipped for survival in a harsh environment. Two coats of fur and a thick layer of blubber help insulate the polar bear's body from the cold, keeping its temperature at an even 37° C (98.6° F).

Polar bears have thick fur, a layer of blubber, and a white coat that helps them survive in polar regions. These features provide insulation, store energy, and offer camouflage. Their ability to generate heat further aids in maintaining their internal temperature.

Adaptations of Polar Bears to Cold Climates

Polar bears (Ursus maritimus) have several adaptations that allow them to thrive in extremely cold polar areas. These adaptations include:

Thanks to these incredible adaptations, polar bears are well-equipped to survive and thrive in their Arctic ecosystem.

Energy begins with the sun and is captured by plants via photosynthesis. It is then passed up through different levels of consumers in a food chain, from herbivores to carnivores. A food web shows a more complex, interconnected system of energy transfer, with energy lost as heat at each level.

Energy in ecosystems is transferred through food chains and food webs. It all starts with energy from the sun, which is harnessed by producers (like plants) through the process of photosynthesis. These producers are consumed by primary consumers (herbivores), which in turn are consumed by secondary consumers (carnivores). Each layer of consumption represents a level in the food chain.

A food web, on the other hand, is a more complex representation of multiple food chains that intersect. These interconnections demonstrate how energy moves in a less linear, more interconnected way. The energy is lost as heat up the food chain or web, thus the higher the level, the less energy is available.

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Answer:

The grass

btw there's no pic of the food web

Answer:

The protons and the neutrons are found in the nucleus of an atom.

Explanation:

Atoms are best described as the smallest unit of any matter.

Protons can be described as part of an atom which carries a positive charge. The protons are enclosed in the nucleus of the atom.

The neutron is the part of the atom that carries zero charge. The neutron is also enclosed in the nucleus of the atom.

The electrons can be described as the part of an atom that carries a negative charge. The electrons move around the nucleus in orbits.