The living and nonliving things in an area that interact with one
another and with their environment are a community.
a. true
b. false
17 Answer:
Predation is a relationship in which one organism lives on, near,
or inside another organism.
a. true
b. false
18 Answer:
Herbivores return matter to the environment from the bodies of dead
plants and animals.
a. true
b. false
19 Answer:
Organisms that eat only plants are called omnivores.
a. true
b. false
20 Answer:
The base of an energy pyramid consists only of autotrophs.
a. true
b. false

Answer:

blood hormone level will increase

Explanation:

since once food reach the stomach it will trigger different hormone process that cause release of enzymes required to digest carbohydrate

After ingesting a plate of pasta, which is rich in carbohydrates, the levels of insulin increases and glucagon decreases in the blood.

The hormone insulin and glucagon work in a negative feedback loop. At the time of digestion, the foods, which comprise carbohydrates are transformed into glucose. The majority of this glucose is sent to the bloodstream, resulting the elevation of blood glucose levels.

This enhancement in the levels of glucose in the blood signals the pancreas to generate insulin, and reduce the levels of glucagon in the blood. After some hours, glucagon works to counterbalance the activities of insulin.

After five to six hours, the levels of glucose in the blood decreases due to the activity of insulin, this instigates the pancreas to generate glucagon.

Thus, after eating carbohydrate rich food, the levels of insulin increases in the blood and glucagon decreases.

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Answer:

b

Explanation:

........

During the second trimester, the pregnant lady experiences increase in energy as the growth of the child increases linearly. Thus, the correct option is B.

Development of the placenta occurs in the first trimester and by the 12th week it is fully developed and functional.

Although eyes develop completely in the early stages of pregnancy by the 13th week, the eyes remain closed and open in the third trimester.

Heartbeat is evident since the beginning of pregnancy. The heart is in its primitive form at that stage and develops by the end of first trimester.

As weight of the mother starts increasing in the second trimester, the energy requirements also increase, due to increase in energy. The increase in energy is estimated to be around 45-170 kcal.

Thus, the correct option is B.

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The function of carbohydrates in your body is ​carbohydrates give you energy, the food you consume is broken down into glucose.

Carbohydrates is defied as that contains biomolecule that contains carbon hydrogen and oxygen in a ratio of 2:1. Carbohydrates are mane source of energy of the body they work as fuel for the brain, kidneys central nervous system and heart muscle.

\(Cn(H2O)n\) is the basic formula for all carbohydrates . But this formula have limitation i.e it applies where same amount of carbon and water are use. Initially the terms carbohydrate was used to describe compounds that have really contains carbohydrates.  Because they had simple formula \(CH20.\)

In modern Era carbohydrates are classified on the basis of their structure not on their formulae. Such as aldehydes and ketones are now known as polyhydroxy.

Therefore, The function of carbohydrates in your body is ​carbohydrates give you energy, the food you consume is broken down into glucose.

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The correct answer is d. holocrine secretion, where the entire cell is destroyed during the release of its product.

Holocrine secretion is a type of secretion in which the entire cell is destroyed during the process of releasing its product. This occurs when the secretory cells accumulate and store their product within their cytoplasm until it reaches a certain level of maturity. Once the product reaches the desired level, the entire cell disintegrates, releasing the accumulated secretion along with the cell debris.

Examples of holocrine secretion can be found in certain glands of the body, such as the sebaceous glands in the skin. Sebaceous glands produce sebum, an oily substance that helps lubricate and protect the skin and hair. In the case of sebaceous glands, the secretory cells accumulate sebum within their cytoplasm until they burst, releasing the sebum and cell fragments onto the skin's surface.

In contrast, other types of secretion, such as endocrine secretion, merocrine secretion, and apocrine secretion, do not involve the destruction of the entire cell. Endocrine secretion refers to the release of hormones directly into the bloodstream, while merocrine secretion involves the release of secretory products through exocytosis without any cell damage. Apocrine secretion is characterized by the release of secretory products along with a portion of the cell membrane.

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The mammalian trachea and esophagus both connect to the A. pharynx

Pharynx is the region where the mammalian trachea and esophagus both connect.

Pharynx is funnel shaped pathway for the food to enter the food pipe.

During the process of swallowing of the food or the bolus, the bolus reach the pharynx and with the successive movement of the gut, the bolus reaches the stomach. The passage of the food through the esophagus has to be maintained to prevent it from entering into the windpipe or the trachea of the mammal.

Hence, the Trachea is covered with epiglottis to prevent food from entering which is a thin flap like structure acting as a barrier to the food to enter the windpipe.

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If the gametophyte that produced a moss sporophyte died, the moss sporophyte would continue to grow and develop.

In mosses, the gametophyte is the dominant generation, and it provides nutrients and support to the sporophyte. However, once the sporophyte is mature and can photosynthesize, it becomes less dependent on the gametophyte. Thus, the death of the gametophyte may not significantly impact the sporophyte.
The moss sporophyte can continue to grow and develop even if the gametophyte that produced it died.
If the gametophyte that produced a fern sporophyte died, the fern sporophyte would be unaffected.
In ferns, the sporophyte is the dominant generation, and it is independent of the gametophyte. Once the sporophyte is produced, it can grow and develop on its own without any support from the gametophyte.

Therefore, the death of the gametophyte would have no impact on the fern sporophyte.

Summary: The fern sporophyte is independent and would not be affected if the gametophyte that produced it died.

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There are several factors that may cause a mineral deposit that had not been considered valuable to become highly sought after. Some of these factors include:

Technological advancements: Advances in technology can make it possible to extract and process minerals that were previously uneconomic. For example, if new technologies make it possible to extract a mineral from a previously unprofitable deposit, it can become highly sought after.

Market demand: Changes in market conditions can increase the demand for a particular mineral. For example, if a mineral is used in new technologies or products, the demand for it may increase, making previously uneconomic deposits viable.

Political or economic instability in a region can cause the prices of certain minerals to rise, making previously uneconomic deposits more attractive.

Exploration and discovery: New discoveries of mineral deposits can also lead to previously uneconomic deposits becoming highly sought after. Exploration companies and geologists are constantly searching for new mineral deposits, and when they find one, it can become highly sought after.

Natural occurrences: Natural occurrences such as natural disaster, geological shifts and changes in the environment can cause a previously uneconomic mineral deposit to become highly sought after.

It's important to note that these are just some examples, other factors may also play a role in the changes in the mineral market.

Answer:

B. inputs

Explanation:

Answer:

inputs

Explanation:

i just did this test and chose inputs and got it correct

The conversion of 3-phosphoglycerate to 2,3-bisphosphoglycerate (2,3-BPG) instead of 2-phosphoglycerate during high-intensity aerobic exercise is beneficial because 2,3-BPG plays a crucial role in regulating the release of oxygen from hemoglobin in red blood cells. This process is known as the Bohr effect.

During intense exercise, the muscles require more oxygen to produce energy. As the oxygen supply decreases, the muscle cells start to generate more carbon dioxide and lactic acid. These byproducts of metabolism cause a decrease in the pH (acidic environment) of the blood and muscle tissues.

The presence of 2,3-BPG helps in adapting to this acidic environment. When 3-phosphoglycerate is converted to 2,3-BPG, it binds to hemoglobin within the red blood cells. This binding alters the structure of hemoglobin, causing it to release oxygen more readily at the tissues.

By promoting the release of oxygen, 2,3-BPG helps to enhance the oxygen delivery to the working muscles. This ensures that the muscles receive a sufficient oxygen supply to support their high energy demands during intense exercise. Without the presence of 2,3-BPG, hemoglobin would have a stronger affinity for oxygen, making it less likely to release it to the tissues.

In summary, the conversion of 3-phosphoglycerate to 2,3-BPG during high-intensity aerobic exercise is beneficial because it facilitates the release of oxygen from hemoglobin, ensuring an adequate oxygen supply to the muscles despite the acidic environment created by increased metabolism.

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Histone acetylation prepares DNA for transcription by neutralizing the positive charge on histones, leading to a more open chromatin structure that enables the binding of transcription machinery to DNA.

Histone acetylation is a key process that regulates gene expression by modifying the structure of chromatin, the complex of DNA and histone proteins. Histones are positively charged due to the presence of amino acids such as lysine and arginine, while DNA is negatively charged because of its phosphate groups. These opposite charges cause DNA to wrap tightly around histones, forming nucleosomes.

In order to initiate transcription, the DNA must be accessible for the transcription machinery, including RNA polymerase and transcription factors. Histone acetylation plays a critical role in this process by neutralizing the positive charge of histones. During acetylation, an acetyl group is added to the lysine residues in the histone tail by enzymes called histone acetyltransferases (HATs). This addition neutralizes the positive charge on the histones, reducing their affinity for the negatively charged DNA.

As a result, the chromatin structure becomes more relaxed and open, allowing the transcription machinery to access the DNA and bind to specific sequences known as promoter regions. This facilitates the initiation of transcription, converting the DNA sequence into a messenger RNA (mRNA) molecule, which is then used as a template for protein synthesis.

In summary, histone acetylation prepares DNA for transcription by neutralizing the positive charge on histones, leading to a more open chromatin structure that enables the binding of transcription machinery to DNA.

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Answer:

what chemical reaction causes a volcano to erupt?

Explanation:

hope that helps :)

Answer:

A. matter

Explanation:

Answer:

A

Explanation:

Mass is the measure of matter.

You can take a baseball to the moon and it'll have a different weight but the mass will be the same.

The majority of the stomach and related organs are suspended from the posterior body wall by double-layered peritoneal sheets called mesenteries, which also offer paths for blood vessels and nerves to the viscera, which pass between the two layers.

The vascular and nerves that connect to the intraperitoneal organs are attached by a mesentery, which is a double layer of peritoneum. One organ or structure within the peritoneal cavity is supported by a ligament, which is composed of two layers of visceral peritoneum.

The serous membranes are adhered back to back in the abdominal cavity's mesenteries, which are double layers of peritoneum that continue the visceral and parietal peritoneum and allow the outside mesothelium to leak serous fluid into the peritoneal cavity.

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Ion channel openings and closings enable all sensory receptors to start nerve impulses. Ion channels, which are specialized proteins embedded in the cell membranes of neurons and other cells,

enable the selective transit of ions like sodium (Na+), potassium (K+), and calcium (Ca2+) into or out of the cell. A sensory receptor's activation by a stimulus like pressure, light, or sound sets off a chain of events that cause certain ion channels in the receptor cell membrane to open or close. A sensory receptor's activation by a stimulus like pressure, light,  This alters the electrical potential across the membrane, causing a nerve impulse to be produced and sent down the sensory neuron to the central nervous system (CNS) for processing and interpretation.

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Answer: The urinary system

Explanation:

Answer:

Kidneys regulate the osmotic pressure of a mammal's blood through extensive filtration and purification, in a process known as osmoregulation. Kidneys filter the blood; urine is the filtrate that eliminates waste from the body via the ureter into the bladder.

Explanation:

If pyruvate forms in a well-oxygenated human cell, it will: (a) become decarboxylated, leaving its remaining two carbon atoms bound to coenzyme A.

Pyruvate or pyruvic acid is an alpha-keto acid with two functional groups: carboxylic acid and ketone. It is the product of the glycolysis reaction that occurs in all of the organisms. It is formed in the cytoplasm of the cell. In human cells, the pyruvate gets oxidized.

Coenzyme A is important for the synthesis of fatty acids and also in the oxidation of pyruvate in the living organisms. It is a very essential cofactor for the initiation of the citric acid cycle in aerobic organisms.

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Beadle and Tatum's work on auxotroph's suggested that metabolism was controlled by protein enzymes by identifying the link between genes and enzymes. This theory is also referred to as "one gene, one enzyme hypothesis" as stated in their experiment.

The experiment was conducted using a bread mold called Neurospora crassa, where they grew the mold on a minimal growth medium that lacked specific nutrients. The scientists observed that certain mutations in the mold led to the inability to grow on this minimal growth medium. They identified the mold that could grow on a medium containing arginine, but failed to grow on a medium that lacked arginine. They then discovered that the mutated molds were deficient in producing specific enzymes required to produce arginine and could only grow on a medium containing arginine.Since the mutants required a specific nutrient that the wild types did not, Beadle and Tatum postulated that the mutations were caused by altered or disrupted genes that affect the enzymes produced by these genes.

Thus, the mutants were unable to produce the required enzymes, which resulted in their inability to grow on the minimal growth medium. Therefore, the experiment concluded that one gene encoded for one enzyme which was responsible for controlling the metabolic pathway of producing arginine. The experiment showed that each gene encoded for a specific enzyme in the metabolic pathway that controlled the production of arginine.

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Answer: A

Explanation: most bright colored animals are poisonous

Answer:

A. Poisonous

Explanation:

If you find a brightly colored insect resting on a leaf, it is most likely to be poisonous. Any insects that are brightly colored is a warning to predators that they’re toxic.

Explanation:

Because population increase the number of people so,their need will increase. Hence it can change to the physical or biological components of an ecosystem.

Enzymes are the biological catalysts. They are made up of proteins that have the catalytic activity. It is the result of enzymes that each reaction is accomplished within seconds inside the living organisms, which otherwise would have taken even days to finish up.

Substrate is the starting product in any chemical reaction. The enzymes acts upon the substrate, causes some changes in it and therefore forms the product.

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Answer:

c. red, green and blue.

Explanation:

The three main colors, also known as the primary colors are Red, Green and Blue. The trichromatic theory believes that the human eye and receive light of three different wavelengths (which are red, green and blue) and is able to combine these three different wavelengths in order to see the entire visible spectrum that make up millions of different colors. As can be visualized by the attached picture below.

According to the trichromatic theory of color vision, the eye has cones sensitive to colors associated with red, green, and blue. Therefore, the correct option is C.

According to the trichromatic theory, commonly known as the Young–Helmholtz theory, the human eye has three different types of color-sensitive cones, each sensitive to a different range of light wavelengths. These cones are most sensitive to red, green and blue light respectively.

Our visual system is able to perceive a wide spectrum of colors by integrating information from these three different types of cones. Different levels of activation of these three cone types and stimuli lead to the perception of additional colors.

Therefore, the correct option is C.

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Answer:

GILLLS

Explanation:

Substrate concentration affect enzyme activity -

1. There is more enzyme activity at higher substrate concentrations due to more collisions between enzyme and substrate until a maximum rate is reached

2 Once the maximum reaction rate for the enzyme is reached, the reaction rate levels off.

The enzymatic reaction depends on various factors including temperature, substrate concentration, concentration enzyme, and other factors. The rate of a chemical reaction is affected by the total number of enzymes as well as the concentration of substrate

Thus, Substrate concentration affect enzyme activity -

1. There is more enzyme activity at higher substrate concentrations due to more collisions between enzyme and substrate until a maximum rate is reached

2 Once the maximum reaction rate for the enzyme is reached, the reaction rate levels off.

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Answer:

Sedimentation.

Explanation:

The process that is responsible for the movement of carbon atoms from the biosphere to the geosphere is called sedimentation. Carbon enters the geosphere or lithosphere through the biosphere when dead organic matter becomes incorporated into the soil that turns the shells of calcium carbonate to become limestone through the process which is called sedimentation. This sedimentation process is very necessary for the formation of different types of minerals such as limestone, fossil fuels etc.

Answer:

interphase is the portion of the cell cycle that is not accompanied by gross changes under the microscope, and includes the G1, S and G2 phases

Explanation:

A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. T

Answer:

Explanation:

Water helps make salt

Food, water, shelter, predation, and density are all things that can allow a population to increase or cause it to decrease. Limiting factors like food and water are necessary resources for all organisms without them they will die so these factors directly affect any population size. Hope this helps :)

Answer: More people require more resources, which means that as the population increases, the Earth's resources deplete more rapidly. The result of this depletion is deforestation and loss of biodiversity as humans strip the Earth of resources to accommodate rising population numbers. Food, water, shelter, predation, and density are all things that can allow a population to grow or cause it to decline. Limiting factors like food and water are necessary resources for all organisms; without them they will die so these factors directly affect population size.

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