is natural gas renewable or non renewable?

The answer is theory which is a proposed explanation whose status is still conjectural and subject to experimentation, in contrast to well-established propositions that are regarded as reporting matters of actual fact.

Answer:

D) theory

Explanation:

     Theory is the set of fundamental principles of an art or a science. Theory is a synthesized opinion, it is a general notion. From the Greek theoria which in the historical context meant to observe or examine. With its evolution the term came to designate the set of ideas, the basis of a certain theme, which seeks to convey a general notion of some aspects of reality.

     Theory is also a conjecture, an opinion formed before a fact. One theory attempts to explain something difficult to accomplish.

     A scientific theory is the speculative part of a science, as opposed to practice. It is a consistent system formed by observations, ideas and axioms or postulates, constituting as a whole a set that tries to explain certain phenomena.

    Examples of scientific theories are: Chaos Theory, Communication Theory, Knowledge Theory, Evolution Theory, Game Theory, Quantum Theory, Relativity Theory, among others.

the presence of plants (APEX)

Terrestrial habitats are distinguished by their climate and vegetation, with temperature and precipitation being the key factors that determine the types of plants and animals that can thrive in a particular biome.

Temperature and precipitation are the key abiotic factors that shape the composition of animal and plant communities in these biomes. These habitats include a variety of biomes, such as tundras, temperate forests, grasslands, chaparral, deserts, and tropical forests.

The types of plants and animal communities present in a terrestrial biome are greatly influenced by the amount of precipitation and the temperature of the area. For instance, you will find sparse vegetation in deserts due to low rainfall, while tropical rainforests exhibit lush plant life due to abundant precipitation throughout the year.

These biomes can be found in various geographic locations with similar climates. Some, like the tropical wet forest biome, have high net primary productivity due to warm temperatures and consistent water availability. In contrast, biomes such as deserts and tundras have lower primary productivity because of extreme temperatures and limited water.

Therefore,  a distinguishing characteristic of terrestrial habitats is that they are primarily defined by their climate and the vegetation they support.

Archaebacteria = 10,000/20 = 500 species  

Eubacteria = 10,000/1 = 10,000 species  

Do the rest the same way, since you've got the graph right in front of you.

I am pretty sure there are 20 electrons, becuase there are the same amount of protons and electrons

Protons, neutrons and electrons. ... The number is used to arrange the elements in the periodic table, beginning with hydrogen, which has just one proton. Electrons are contained in shells around the nucleus. In a neutral atom the total number of electrons is always the same as the number of protons in the nucleus.

The Answer would be 20 electrons since protons and electrons are the same.

If it is a MCQ, I cannot find the propositions, I just can explain to you what's the dorsal nerve cord.

The dorsal nerve cord is one of the unique embryonic characteristics of the ganglia next to the dorsal cord. The dorsal nerve cord is a hollow dorsal cord.

It consists of a part of the exfoliated coagulant, forming a hollow tube, compared to other animal species that have solid abdominal tubes.

The dorsal nerve cord later changes in vertebrates to the central nervous system, which consists of the brain and spinal cord. The dorsal nerve cord is found mainly in the vertebrae vertebrates.

A thick grouping of nerves that runs down the back of the embryo.

The answer is; Uracil, Thiamine

The two different structurally, with thymine having a methyl group in its ring structure which uracil lacks. DNA does not have uracil because  Cytosine can be tautamerized and deaminate to produce uracil. Uracil is recognized by repair enzyme of DNA, nicked and replaced by cytosine. If uracil were a component of DNA, the repair systems would not be able to distinguish original uracil from uracil originated by deamination of cytosine. Thymine is more stable than uracil, a requirement for DNA which stores critical cell information.

A carbohydrate, because protein and DNA have more elementd

[tex]Work done = Force\times distance[/tex]

From the question,

work done is 520 J

Distance is 260 m

This implies that,

[tex]520 =F\times260[/tex]

[tex]F=\frac{520}{260}[/tex]

[tex]F=2N[/tex]

Hence the motor exerts a force of 2N .

The force exerted by the motor is 2 N.

The work done by the small motor can be calculated using the formula below.

⇒ Formula:

⇒ Where:

⇒ Make F the subject of the equation

From the question,

⇒ Given:

⇒ Substitute these values into equation 2

Hence, The force exerted by the motor is 2 N.

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Answer:

Only options a reflects the instances with valid experiment or conclusion.

Quality of any experiment depends upon two things reliability and validity. Reliability is measure of regeneration of results every time an experiment is performed under specific conditions.

Validity is measure of accuracy of results of an experiment. It can be check by two ways: internal validity (checks the design of the experiment) and external validity (checks if the conclusion is the real explanation of the phenomenon).

Now, in marine biologist experiment, he concluded the results only after one breeding season. This makes his results unreliable as it might have happened by chance.

Similarly, in cola experiment the taste was only checked by one candidate i.e. Karl. He might have problem in his taste buds. In addition, the temperature of cola can also affects its taste which is not taken care of in the experiment. Hence, it is not the valid experiment.

Similarly. Jeanette could use more plants for her experiment and Robert just followed only one instruction. He didn't perform any experiment.

Only options a (effect of soil pH on pine seedlings) and b (oil pollution's impact on seagull eggs) represent valid experiments due to controlled conditions and the potential for a repeatable setup. The other instances lack proper control, methodology, and objectivity, which are crucial for scientific investigations.

When determining which instances reflect a valid experiment or conclusion, it is essential to consider certain factors such as the control of variables, having a clear hypothesis, and the ability to repeat the test to draw reliable inferences. Here is the analysis for each instance provided:

a. This biology class's experiment maintains constant conditions for pot size, water, and light exposure while varying only the soil pH, providing a good setup for a controlled experiment.

b. The marine biologist has observed a potential correlation between the distance from an oil refinery and the number of eggs hatched in seagull nests, which can be further investigated by controlling additional variables.

c. Karl's conclusion lacks the rigor of a controlled experiment as taste is subjective, and no information is provided about sample size, controls, or blinding procedures. Therefore, it does not represent a valid scientific conclusion.

d. While Jeanette has a hypothesis, her experiment with only two plants and no control group for the non-musical environment is not sufficiently rigorous.

e. Robert's method for reading the ambient temperature is inaccurate, as holding the thermometer under a bright light could increase the reading, invalidating the experiment's validity.

Valid experiments must be designed to isolate variables and be repeatable, allowing for inductive reasoning to confirm hypotheses with substantial data. In the instances given, options a and b appear to be the most valid experiments.

The correct answer is: physical activity.

Basal energy expenditure is defined as  the amount of oxygen  (O2) which is consumed while resting and fasting, extrapolated to 24 hrs. Basal energy expenditure is used to determine an individual's caloric needs and it depends on gender, age, activity..

The production of ATP from glucose in the presence of oxygen.

So I would go with C) processes that require oxygen and produce ATP

The statement which best describes aerobic respiration is: C. processes that require oxygen and produce ATP.

Aerobic reaction can be defined as biological and chemical processes that occurs in the presence of oxygen.

Hence, an aerobic reaction requires oxygen before it can take place or occur and it produces adenosine triphosphate (ATP) as one of its end product.

In Science, some examples of an aerobic reaction include the following:

In conclusion, an aerobic respiration refers to how the body of a living organism uses oxygen such as;

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The answer is a neural tube.

Intraspecific competition is when members of the same species compete for resources.

Using this definition, we know that:

1) competition is "compete", which is the latter half of the answer.

this leaves Intraspecific's definition in the beginning half of the answer

Intraspecific means "[something] existing within a species or individuals"

hope this helps

Hi!

In an ecosystem, organisms compete for different resources. Intraspecific competition occurs when there’s competition for resources between members of the same species. What do you think the word interspecific refers to? Give an example with your explanation.

Answer:

The word intraspecific means that the same kind of an organism competes for something!

Water intake is essential in the prevention of heat related injuries

Final answer:

Coin flipping is used to illustrate the role of chance in genetic inheritance and variability, mirroring the randomness in gamete formation during meiosis and the genetic combination at fertilization.

Explanation:

The concept of using coin flipping to simulate mitosis and meiosis relates directly to understanding how probability and inheritance play a role in biological processes. In sexual reproduction, particularly during the formation of gametes through meiosis and their subsequent union at fertilization, the same principles of probability that govern a coin toss are applicable. This is because the assortment of genes and the random combination of alleles during these processes can be represented using models that simulate chance events.

For instance, using pop-it beads to model the separation and duplication of chromosomes during mitosis helps visualize the replication and division of genetic material in a cell. Moreover, different activities involving evolutionary biology, such as the coin flipping analogy, are useful for demonstrating how chance and probability influence which alleles are passed on to subsequent generations. Understanding these principles is key to comprehending the genetic variability seen in populations, an important factor in evolution and natural selection.

The substances in our diet that make up myelin are avocados, fish, nuts, whole grains and any food rich in Vitamin B-1 and B-12. Omega-3 is good for mental health because it improves memory and removes all the symptoms of depression and can get you out of it. It also helps people who have mental illnesses.

Answer:

The correct answers are:

1. closing

2. the ventricles and arteries,

3. a constricted trachea

Lub is the first sound of a heartbeat and is mentioned as S1. It is usually produced due to the closing of tricuspid and and mitral or bicuspid valves present between atria and ventricles.

Tricupsid is located between atrium and ventricle of the right hand side and mitral valve is located between atrium and ventricle of the left hand side. They prevent the back flow of blood from ventricles to their respective atria.

Dub, being the second sound is written as S2. It is produced due to the closing of pulmonary (located between right ventricle and pulmonary artery) and aortic valves (located between left artery and aorta).

These valves prevent the back flow of blood from arteries into the ventricles.

The time between the two sounds is often taken as the measure of the diastole i.e. ventricular filling.

Wheezing refers to a high-pitched sound produced when a person breathes, especially during exhale. It is caused by constriction of the airways or inflammation. It is considered as a symptom of various diseases such as asthma, COPD, allergies, bronchitis etc.

In listening to the heart using a stethoscope, 'lub' represents closing of the atrioventricular valves and 'dub' represents closing of the valves between the ventricles and arteries. Wheezing or whistling sounds when monitoring the respiratory system likely indicate a constricted trachea.

In listening to a heart using a stethoscope, the 'lub' sound represents the closing (1) of the atrioventricular valves. These valves separate the upper chambers, the atria, from the lower chambers, the ventricles. This closing of the valves prevents blood from flowing backward into the atria while the ventricles contract. The 'dub' sound signifies the closure of the semilunar valves, which are located between the ventricles and arteries (2). These valves prevent backflow of blood into the ventricles after the heart contracts.

Regarding the respiratory system, when using a stethoscope, a whistling or wheezing sound often signifies a constricted trachea (3). This condition may be caused by a variety of issues such as asthma, bronchitis, or other respiratory disorders.

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Final answer:

Quaternary consumers have the least amount of stored energy in an ecological pyramid. Primary producers have the most energy, with approximately 1,000,000 kilocalories, while quaternary consumers may only have around 1,000 kilocalories due to the energy loss at each trophic level transfer.

Explanation:

In an ecological pyramid, the organisms that have the least amount of stored energy are the quaternary consumers. If we assume that producers in this pyramid have 1,000,000 kilocalories of energy, the energy available to primary consumers will be significantly less due to the energy transfer inefficiency. Energy transfer between trophic levels is typically around 10%, meaning that only about 100,000 kilocalories are available to primary consumers.

Energy pyramids must always be upright to honor the laws of thermodynamics, specifically the first law, which states that energy can neither be created nor destroyed, and the second law, which indicates that energy transfer is not 100% efficient due to entropy. Biomass decreases from lower to higher levels due to energy loss at each transfer. Thus, primary producers have the highest biomass and energy, with these quantities decreasing at each ascending trophic level.

Therefore, higher trophic levels such as secondary, tertiary, and especially quaternary consumers will have much less energy available and consequently, less biomass. For example, in our scenario with producers having 1,000,000 kilocalories, quaternary consumers may only have around 1,000 kilocalories available to them.

a) talc  Most people are familiar with the mineral talc. It can be crushed into a white powder that is widely known as "talcum powder." This powder has the ability to absorb moisture, absorb oils, absorb odor, serve as a lubricant, and produce an astringent effect with human skin.

Talc is used to make baby powder because,it  absorb moisture and keeps the baby dry..

The term talc refers to the mineral that is obtained from the soil and is used in the manufacturing of powder.

This mineral is composed of magnesium, silicon, and oxygen and has the important property of being able to absorb moisture henece it is used in baby powder.

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The correct answer is option D, that is, nitrogen and phosphorus.  

Nucleic acids refer to the macromolecules comprising oxygen, hydrogen, phosphorus, and carbon. They are the small biomolecules or the biopolymers, playing an essential role in all the known forms of life.  

They comprise nucleotides that are the monomers formed of three constituents, that is, a 5-carbon sugar, a nitrogenous base, and a phosphate group. If the sugar is obtained from ribose as deoxyribose, then the polymer is DNA, and if the sugar is a compound ribose, then the polymer is RNA.  

The right option is; B. cytoskeleton

The grid-like lattice of proteins that gives the cell shape and support is the cytoskeleton.

The cytoskeleton is a system of interconnected tubules and filaments that reach out all through the cell, from the cytoplasm. The cytoskeleton is composed of filamentous proteins, and its main function is to give the cell its shape, and mechanical support that helps the cell to perform important functions like movement and division.

There's more to it than just large amounts of biomass to the creation of fertile soil because there's multiple factors that determine what will happen to that biomass and how it will affect the soil.

We can take the temperature, precipitation, and gradient of fall as examples.

The temperature is very important, if its high the decomposition of the biomass will be quick, and if it's very low the decomposition may take years to be completed and the soil to get the benefits of it. But, even if the temperature  is high, if there isn't enough precipitation, than the decomposition will not have any real effect on the soil and the soil will be sandy.

The precipitation is very important because it helps in the decomposition and for getting the nutrients deeper into the soil, so the bigger the amount of it, the better. But if the temperature is relatively low, than it will be a pretty slow process, and the soil will not get the full benefit of it.

The gradient of the fall, as a physical feature is very important because if the gradient is too big, than the biomass will gradually just get downwards with any wind and rain, and the slopes will not see, pretty much, anything from it. On the other hand, if the gradient of the fall is very low, than the biomass will be more stable on the ground, and its movement will be restricted, so the soil will benefit more, depending of course on the other factors as well.

The presence of large amounts of organic matter alone does not result in fertile soil because there needs to be a balance of both organic matter and nutrients in the soil to make it fertile.

Yes, her measurement is accurate.

Accuracy of a measurement is the closeness of a measured value to the actual or standard value. From the question, the first volume she measured; 80.0 ml is closer to the actual volume of water; 80.1ml. In this case, her measurement is accurate.

Answer:

OK

Explanation:

Accuracy = The fact of being exact or  correct, when talking about numbers wemust always consider a variation or more or less than the stablished value. Based on that calculating quantities or volumes of liquids gives us this variation as a permited possibility, also the difference is so minimal that IT MUST BE CONSIDERED AS ACCURATE AND ACCEPTED.

Answer:

The correct answer is option D.) enzymes.

Explanation:

Hello!

Let's solve this!

Catalysts are molecules that have the quality of accelerating reactions.

Let's analyze each of the options:

A.) carbohydrates: they are not molecules that accelerate reactions.

B.) vitamins: they are nutrients, they do not accelerate reactions.

C.) nucleic acids: do not accelerate reactions.

D.) enzymes: they are proteins that accelerate reactions, they are called biological catalysts.

After the analysis we conclude that the correct answer is option D.) enzymes.

Enzymes (D) are the group of proteins that serve as catalysts for metabolic reactions. They accelerate chemical reactions in a cell without being consumed or permanently changed.

The term used for the group of proteins that act as catalysts for metabolic reactions is known as enzymes. Enzymes are biocatalysts that speed up the chemical reactions in a cell without being used up or altered permanently in the process. They play a crucial role in breaking down food into molecules that the body can use. Their function as catalysts enables them to maintain life by regulating the rate at which reactions occur, sustains life.

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Answer: Option D

Explanation: If two kinds of organisms will feed on the same prey then the population of the prey will decrease.

Red tailed hawk prey on prairie dog as their energy source and if another species of hawk will start preying on the same dog population.

Then, the population of prairie dogs will decline very fast as both types of hawk are eating prairie dogs as their food.