why practical sciences is often left out by teachers ?​

There are different alleles of genes that code for all the different traits organisms can express.

Even though there are 50,000 genes in every cell, only about 10% of them are expressed or switched on in any specific cell type.

Only a small fraction of a cell’s genes are transcribed at any given time. The variation in gene expression profiles among different cell types is due to the presence or absence of different sets of transcription regulatory factors. Some regulatory factors are designed to facilitate transcription, while others are designed to inhibit or inhibit transcription.

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If the hydrogen ion pumps in the tiger's mitochondria stopped functioning, it would have severe consequences on the process of oxidative phosphorylation and the overall production of ATP (adenosine triphosphate), which is the energy currency of cells.

The hydrogen ion pumps, also known as the electron transport chain complexes, play a crucial role in oxidative phosphorylation. They are responsible for creating a proton gradient across the inner mitochondrial membrane by pumping hydrogen ions (protons) from the mitochondrial matrix to the intermembrane space. This proton gradient is essential for the functioning of ATP synthase, an enzyme that synthesizes ATP.

Without functioning hydrogen ion pumps, the proton gradient would not be established. As a result, ATP synthase would not be able to generate ATP efficiently. This would lead to a significant reduction in ATP production, which is essential for various cellular processes, including muscle contraction, biosynthesis of molecules, active transport, and maintenance of cellular homeostasis.

The lack of ATP production would cause a rapid depletion of cellular energy reserves. Cells would struggle to carry out their normal functions, and the tiger would experience a loss of energy and overall decline in physical performance. Vital processes such as muscle movement, digestion, and even basic metabolic functions would be compromised.

Additionally, the accumulation of hydrogen ions within the mitochondrial matrix would disrupt the pH balance, affecting the efficiency of other metabolic pathways and potentially leading to cellular damage or dysfunction.

In summary, the dysfunction of hydrogen ion pumps in the tiger's mitochondria would severely impair ATP production, resulting in a decline in energy levels and overall cellular function. It would have significant implications for the tiger's survival and well-being.

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Answer:

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Explanation:

When the body undergoes exercise, your body needs more energy, which means your tissues consume more oxygen than they do at rest.

Consuming more oxygen means you will also produce more carbon dioxide because your metabolic rate is elevated.

Answer:

During exercise, blood spends up to half the normal time (one second at rest) in the pulmonary capillaries due to the increase in cardiac output moving blood around the body more quickly.

Explanation:

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Answer:

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The average failure rate of start-up greenhouse businesses is 60 percent, a figure in keeping with other start-up businesses in the United States.

A horticultural enterprise pertains to a business engaged in cultivating plants within a greenhouse. Greenhouses are edifices enveloped in glass or plastic, affording growers the ability to regulate the internal environment. This grants them the opportunity to cultivate plants throughout the year, irrespective of external weather conditions.

Greenhouse businesses have the capacity to offer a diverse range of plants, encompassing blossoms, vegetables, herbs, and arboreal specimens. Additionally, they can supply plant-related merchandise, including seeds, fertilizers, and pesticides.

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Segments and septa are related anatomical structures found in various organisms, particularly in arthropods and annelids.

Segments: Segments are the division of the body into distinct repetitive units, often externally visible as repeated body parts. Examples include earthworms, millipedes, centipedes, and insects.

Septa: Septa are partitions or walls that separate individual segments or compartments within an organism's body, providing structural support and creating distinct compartments. They can be found internally or externally, dividing the body surface into discrete units.

Organisation, structure, and coordination are provided by segments and septa within the bodies of segmented organisms, enabling specialised functions within each segment while preserving the integrity of the entire body. Depending on the organism and the purpose they serve, septa may be membranous or more rigid in structure. Septa in segmented animals provide support and stop internal structures from moving or being displaced, preserving the integrity and functionality of each segment.

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A mass extinction event is when over 75% of species die out in a relatively short period of time. Therefore, the correct answer is: D. 75%

Earth's biodiversity declines rapidly and widely during an extinction event. A significant shift in the variety and abundance of multicellular organisms indicates such an event. It occurs when both the rate of speciation and the rate of extinction outpace the background rate.

A short period of geological time known as a mass extinction occurs when a significant portion of biodiversity, or distinct species—such as bacteria, fungi, plants, mammals, birds, reptiles, amphibians, fish, and invertebrates—die.

Impacts from comets and asteroid, widespread volcanism, climatic changes, rapid shifts in geography and ocean currents, or a combination of these can all lead to mass extinctions. The extinction of a single species is a characteristic of the flora and fauna of Earth.

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A grower who wishes to enhance plant growth by adjusting the carbon dioxide levels in the greenhouse can use a carbon dioxide (CO2) gas analyzer to evaluate CO2 levels.

The amount of carbon dioxide, methane, and nitrous oxide in the atmosphere of Earth may be measured using a glasshouse gas analyzer.

Studies of the air quality in the field, leak identification, and natural gas monitoring may all be done using a glasshouse gas analyzer that analyses CH4, CO2, and H2O.

TIGER OPTICS, A. With extreme precision and accuracy, the T-I Max AIR CO2 glasshouse gas analyzer can test CO2 levels in the air.

Nova Analytical Systems provides CO2 analyzers that detect carbon dioxide levels in parts-per-million (ppm) or as a percentage using infrared technology.

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Answer:

parteeres

Explanation:

rectangular reflecting pools or circular beds that play a geometrical counterpoint to the gardens right angled parteeres

Scaffolding branches are the central branches that are preserved in central leader pruning.  Option 3.

Scaffolding branches refer to central branches that are preserved in central leader pruning.

These branches serve as the main structural framework of a tree and are selected to support future growth and development. Scaffolding branches are strategically chosen and maintained to provide a strong and balanced framework for the tree.

They act as the primary branches from which new growth will emerge in subsequent pruning and play a crucial role in shaping the overall structure of the tree.

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Answer:

76 amino acids can be coded for 288 bases.

One of the likely consequences of a failure at any stage of a hydroponic system is that it can cause domino effects cascading through the entire system. Option 3.

In a hydroponic system, each stage and component are interconnected and rely on one another for proper functioning. If there is a failure or issue at any stage of the system, it can disrupt the balance and functionality of the entire system.

For example, if there is a problem with nutrient delivery or imbalances in pH levels, it can affect the health and growth of plants throughout the system.

These issues can quickly spread and impact other plants, leading to a cascade of negative effects.

It is crucial to address and resolve any failures promptly to prevent further damage and maintain the overall health and productivity of the hydroponic system.

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Human activities such as agriculture are impacting upon the natural ecosystems.

Environmental issues can result from considerable environmental stress caused by human activity. Natural resource exploitation and consumption, pollutant production, habitat destruction, and ecosystem modification are all frequent components of these activities.

Intensive farming methods, such as cutting down trees to make way for farms and using chemical pesticides and fertilizers, can deteriorate soil quality, cause deforestation, and cause runoff to pollute water. Ecosystems are disturbed, biodiversity is decreased, and deforestation causes climate change by releasing carbon dioxide that was previously held in trees.

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Human activities, such as deforestation, contamination, overfishing, and nursery gas outflows, disturb the environment, jeopardizing supportability by undermining biodiversity and biological system wellbeing.

Human activities play a critical part in setting stress upon the environment, disturbing the fragile interrelationship between people and the physical environment.

Activities such as deforestation, mechanical contamination, overfishing, and nursery gas emanations contribute to major natural issues.

Deforestation leads to territory misfortune and expanded carbon dioxide levels, whereas mechanical contamination sullies discuss, water, and soil.

Overfishing disturbs marine environments and depletes angle populaces, and nursery gas emanations contribute to climate alteration.

These natural issues, in case, cleared out unaddressed, debilitate our capacity to live reasonably, jeopardizing biodiversity, clean discuss and water, and in general environmental well-being.

Accomplishing supportability requires adjusting human needs with natural preservation and advancing dependable asset administration.

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The conclusion can be drawn from this data is C. No conclusions can be drawn from this data.

The data shows that the plant given fertilizer grew faster than the plant not given fertilizer in weeks 1 and 3, but the plant not given fertilizer grew faster in weeks 2 and 4. This suggests that there is no clear relationship between fertilizer and plant growth.

There are a number of possible explanations for this. One possibility is that the fertilizer is not effective. Another possibility is that the plants are not responding to the fertilizer in the same way. It is also possible that other factors, such as the amount of water or sunlight the plants receive, are affecting their growth.

To draw a conclusion about the effect of fertilizer on plant growth, it would be necessary to conduct a more controlled experiment. This experiment would need to include a larger sample size and control for other factors that could affect plant growth.

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The use of Zoysia grass is likely to produce the benefit of reducing erosion on embankments. Option 4.

Zoysia grass is a plant with dense growth habits with an extensive root system, which makes it effective in preventing soil erosion.

When planted on embankments or slopes, Zoysia grass helps stabilize the soil by binding it together with its roots, thereby reducing the risk of erosion caused by water runoff.

The dense growth of Zoysia grass also helps to trap sediment and slow down the movement of water, further reducing erosion.

While Zoysia grass can offer other advantages such as weed control and providing green growth when Bermuda grass is dormant, its ability to reduce erosion on embankments is one of its notable benefits.

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