8th grade science second page

Answer:

An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. These biotic and abiotic components are linked together through nutrient cycles and energy flows

a biological community of interacting organisms and their physical environment.

The ecology of a lake obtains considerable damage when items are put in it that aren’t supposed to be there. Human activities like agricultural runoff, dumping of industrial waste, and sewage treatment contribute to the pollution of freshwater bodies. It affects aquatic life and the ecological balance of the lake by disrupting the food chain and natural processes.

An ecosystem refers to a natural system of living things and their surroundings. A lake ecosystem includes various living organisms such as fish, plankton, algae, and many other aquatic species. Additionally, it comprises non-living things such as water, minerals, nutrients, etc. Any human-made or synthetic material that enters the lake upsets this natural balance. When harmful chemicals such as pesticides and fertilizers are used on agricultural fields, they contaminate the water and increase the nutrient content of the lake.

It encourages the growth of algae and other aquatic plants that use up oxygen in the water. When they decompose, they further reduce oxygen levels, which results in suffocation and death of aquatic organisms.Dumping of industrial waste is another human activity that contributes to the pollution of freshwater bodies. Chemicals like lead, mercury, and arsenic are toxic and can cause severe damage to the aquatic ecosystem. Fish and other aquatic animals may ingest these toxins and can accumulate them in their body tissues.

It results in reduced growth, deformities, and death of these animals. Sewage treatment is essential in cities to ensure that wastewater is treated and released into natural water bodies. However, inadequate or improper treatment can lead to a considerable increase in nutrients and organic matter in the lake, leading to harmful algal blooms and fish kills. In conclusion, human activities have significantly damaged freshwater ecosystems, and steps must be taken to reduce pollution to save these vital resources.

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Appalachians: Crustal tensional stress and normal faulting

Basin and Range: Crustal tensional stress and normal faulting

Alps: Collision between two continental plates

Explanation to the above given short answers are written below,

The Appalachian Mountains are primarily the result of crustal tensional stress and normal faulting. This mountain range was formed through the rifting and subsequent separation of the North American and African plates, leading to the formation of a divergent boundary.

The tensional stress caused the crust to stretch and fracture, resulting in normal faulting and the uplift of the Appalachian Mountains.

The Basin and Range region is characterized by crustal tensional stress and normal faulting as well. It is located in the western United States and is the result of ongoing extensional forces that have caused the crust to stretch and create a series of mountain ranges and valleys.

This region is known for its fault-block mountains and elongated basins.

The Alps, on the other hand, were formed by the collision between two continental plates: the Eurasian Plate and the African Plate. This collision resulted in intense compression and folding of the Earth's crust, leading to the uplift of the Alps.

The process of convergence between the two plates continues today, causing ongoing mountain building and uplift in the region.

It's important to note that volcanic activity and continued uplift due to isostasy are not associated with the Appalachians, Basin and Range, or the Alps. Volcanic activity is more commonly associated with other mountain ranges such as the Andes or the Cascade Range.

Isostasy refers to the balance of buoyancy between Earth's lithosphere and asthenosphere and does not directly relate to ongoing mountain building processes.

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The overall health of the scrub (shrubland) biome can vary depending on various factors, including climate, human activities, and ecological disturbances.

Negative impacts on the biome can lead to other problems such as habitat loss, species extinction, and decreased ecosystem resilience.

For instance, deforestation or land conversion for agriculture or urbanization can fragment the scrubland habitat, disrupt wildlife populations, and reduce overall biodiversity.

Additionally, pollution from industrial activities or improper waste disposal can contaminate the soil and water, affecting the health of plants, animals, and microorganisms in the ecosystem.

To reduce these negative effects and promote a healthier scrub biome, several approaches can be taken. Firstly, implementing sustainable land management practices is crucial.

This includes responsible land-use planning, reforestation efforts, and promoting conservation strategies to protect existing scrubland areas. By preserving and restoring the natural habitat, we can help maintain the balance of the ecosystem and support the survival of native species.

Secondly, promoting awareness and education about the importance of the scrub biome is essential.

By educating communities, policymakers, and landowners about the value of these ecosystems, we can foster a sense of stewardship and encourage environmentally friendly practices.

Lastly, adopting sustainable agricultural practices can contribute to the health of the scrub biome. Implementing techniques such as agroforestry, organic farming, and precision agriculture can minimize the use of harmful chemicals, reduce soil erosion, and promote biodiversity on agricultural lands adjacent to scrubland areas.

Overall, protecting and restoring the health of the scrub biome requires a multi-faceted approach involving conservation, education, and sustainable practices to mitigate negative impacts and preserve the unique characteristics and ecological functions of this important ecosystem.

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Answer: The answer is C

Explanation:

The correct option is, (c) Letter C.

According to the sort of process they catalyze, enzymes are divided into six categories:

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With regard to the Yellowstone park documentary, we know that wolves reintroduced in Yellowstone altered the river's ecosystem by controlling elk population.

Preservation and conservation differ in their focus on protecting nature and sustainable resource use.

Commensalism benefits one species, amensalism harms one.

Coral reefs, rainforests, and deserts exemplify unique characteristics and ecological concepts.

Land use proposals vary in advantages and disadvantages, but establishing a national park is favored for conservation.

1 )Wolves reintroduced in Yellowstone changed the river by controlling elk population, allowing vegetation to grow, stabilizing banks, and attracting more species. Illustrates ecological interconnectedness.

2) Preservation emphasizes protecting nature in its pristine state, while conservation focuses on sustainable use of resources.

3) Commensalism is a relationship where one species benefits while the other is unaffected, like barnacles on a whale. Amensalism is when one species is harmed while the other is unaffected, like a tree shading grass.

4) The chosen ecosystem is a coral reef. It has a warm temperature, high salinity, and diverse marine life. Unique for its symbiotic relationships and ecological services.

5) The chosen ecosystem is a tropical rainforest. It has a high biodiversity, warm and humid conditions, and a complex food web. Unique for its dense vegetation and nutrient cycling.

6) The chosen ecosystem is a desert. It has low precipitation, extreme temperatures, and adapted desert plants and animals. Unique for its water conservation strategies and reliance on limited resources.

7)Land use proposals: 1) Urban development - Adv: Economic growth. Disadv: Habitat loss. 2) National park - Adv: Conservation. Disadv: Limited land use. 3) Agriculture - Adv: Food production. Disadv: Soil degradation.

8) Personally, I would vote for the establishment of a national park due to its long-term conservation benefits and preservation of natural habitats.

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Answer:

By taking the baby to a doctor so that they can doi testing to see if you child has problems or heathy

Explanation:

The baby might need some shots

Answer:

A

Explanation:

Ebolavirus, genus of viruses in the family Filoviridae, certain members of which are particularly fatal in humans and nonhuman primates. In humans, ebolaviruses are responsible for Ebola virus disease (EVD), an illness characterized primarily by fever, rash, vomiting, diarrhea, and hemorrhaging.

Given the provided data of three bat compositions, swing force, and resulting ball travel distance, the conclusion that can be made regarding this new composition is that the hypothesis of the company is verified when a swing force of more than 100 is applied.

What is a hypothesis?A hypothesis is an explanation of an occurrence that can be tested, analyzed, and then either confirmed or denied. It's a tentative answer to a question that can be checked by conducting an investigation.What is Swing Force?The swing force is the force that a batter applies to a baseball bat in order to hit the ball. A swing force of 100N means that a batter applied 100N of force on the baseball bat.What is the difference between wood, aluminum, and alloy baseball bats?

Wooden baseball bats are made entirely of wood. Aluminum baseball bats are made entirely of aluminum. Alloy baseball bats are made of a mixture of aluminum and other metals such as copper, magnesium, and zinc, to name a few.What conclusion can be made?The hypothesis of the company is verified when a swing force of more than 100 is applied. As a result, the new mixture of metals improved the power of its bats for very powerful batters. Hence, the answer is (C) The hypothesis of the company is verified.

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Answer:

A

Explanation:

am not to sure but it mostly likely is hopefully this helps you

Answer:

Fossil Fuels, smoking, mold

Explanation:

Answer: Fossil Fuels, smoking, mold

Explanation: On Edge!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:

1. stay at rest

2. F = ma, or force is equal to mass times acceleration.

3.?

4.Kilogram-force: kgf

Explanation:

your welcome

Answer:

A. aneuploidy; trisomic

Explanation:

Aneuploidy means having more numbers of chromosomes than usual while polyploidy means having an abnormal number of chromosome sets. Down syndrome is a trisomy on chromosome 21 meaning there are 3 chromosomes for chromosome set 21.

Answer:

A. aneuploidy; trisomic

Explanation:

Down syndrome is probably the most common example of a chromosomal aneuploidy. It is trisomic because an extra copy of Chromosome 21 is made, also known as Trisomy 21.

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Unusually shaped viruses such as lemon-shaped and spindle-shaped have recently been discovered in a variety of environments. The presence of these viruses in the environment has a significant impact on the understanding of the biology of viruses and their effects on the environment and the organisms living in it. Let's discuss some examples of where these viruses have been discovered in more detail.

Lemon-shaped viruses have been identified in the gut of a cricket. These viruses have a unique structure, with a head and a tail-like structure that allows them to infect cells. They are classified as a type of bacteriophage, which means they infect bacteria. Bacteriophages have been found to be abundant in the environment and play an essential role in the control of bacterial populations.

Spindle-shaped viruses have been identified in hot springs in Japan. These viruses are also classified as bacteriophages and have a unique structure with a long, spindle-shaped head and a tail-like structure. Their discovery in hot springs is particularly interesting because it suggests that these viruses may play an essential role in the ecology of these extreme environments.

In conclusion, lemon-shaped and spindle-shaped viruses have been discovered in various environments, from the gut of crickets to hot springs. These viruses have unique structures that allow them to infect cells, and they play a significant role in the ecology of their environments. The discovery of these viruses has expanded our understanding of the biology of viruses and their impact on the environment.

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Where there is a lack of prostatic fluid, all of the following chemicals are decreased in the semen except D, acid phosphatase.

This is due to the fact that prostatic fluid accounts for around 30% of semen volume and has an acid pH of 6.5 to 7. This is because acid phosphatase is generated by both the prostate gland and the epididymis and is secreted by the prostate gland in semen.Acids phosphatase has its optimum activity at pH 5.5, so it is a marker for prostate gland function.

It is essential in the diagnosis and evaluation of prostate cancer, as well as determining the stage and management of the illness. It is also utilized to distinguish between seminal and non-seminal stains in forensic medicine. In summary, the answer to the question is D, acid phosphatase, is not chemicals that decreased in the semen where there is a lack of prostatic fluid.

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Answer:

B. Extinction upsets the natural cycling of nutrients

The extinction of species affect humans as extinction upsets the natural cycling of nutrients. Therefore, option (B) is correct.

Extinction is the end of a sort of life form or of a gathering of sorts, normally an animal categories. The snapshot of annihilation is for the most part viewed as the passing of the last person of the species, albeit the ability to raise and recuperate.

As species go terminated, they are removed from the established pecking order. The animals that ate the species that has gone extinct must find new food or die. Other animal or plant populations could suffer as a result.

Habitat loss and degradation (primarily deforestation), overexploitation (hunting and overfishing), invasive species, climate change, and nitrogen pollution are the main modern causes of extinction.

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Answer:

Why are there different variations of albinism and why it results in the same basic phenotype?

The phenotypic heterogeneity of albinism is due to the different gene mutations affecting various points along the melanin pathway, resulting in varying degrees of decreased melanin production. Additionally, associated developmental changes occur in the optic system as a result from this hypopigmentation.

Explanation:

Answer:

its b.

Explanation:

Answer:

The one you selected is correct

[Choice B] [Second Choice]

__________________________

A good conclusion restates the hypothesis so that the reader sees how the scientist applied the results to the hypothesis.

Answer:  Animals and fungi share a common ancestor and branched away from plants at some point about 1.1 billion years ago.

that's some cool stuffffp

Answer:

- 50% probability if Jessica has genotype "iAi"

- 0% probability if Jessica has genotype "iAiA"

Explanation:

Blood group in humans is controlled by multiple alleles namely; iA, iB and i. iA and iB are codominant but both dominant over i. The following blood types and their respective genotypes are possible;

- Type A: iAiA or iAi

- Type B: iBiB or iBi

- Type AB: iAiB

- Type O: ii

According to this question, Jessica is blood type A (iAiA or iAi) and her husband Graham is blood type O (ii).

- If Jessica has a genotype iAi, the probability that they will give birth to a child with blood type O (ii) is 50% (see punnet square)

- If Jessica has a genotype iAiA, the probability that they will give birth to a child with blood type O (ii) is 0% (see punnet square).

Answer:

The answer to this question is Transport would increase.

Explanation:

The transport would just increase.

In the given area-to-volume ratio, the transport would increase across the cell membrane. The correct option is B.

The surface area to volume ratio is merely the surface area divided by the volume of an entity. It calculates the surface area per unit volume of the object.

The crucial fact is that as the cell size increases, the surface to volume ratio decreases.

If the cell expands beyond a certain size, not really enough material can cross the membrane quickly enough to cater the increased cellular volume.

The surface area divided by the volume is the ratio. This suggests how much surface area is accessible in relation to the size of the cell.

The cell is very large if the surface area to volume ratio is small. If the ratio is large, the surface area exceeds the volume the cell will be small.

Thus, the correct option is B.

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The primer sequence would be 3)  5′ACGUUAGG3′.

The RNA primer is formed on the 3' to 5' template strand because the polymerase adds nucleotides to the 3' end of the RNA primer and builds the new strand in a 5' to 3' direction. The DNA strand is antiparallel, meaning the 5' end of one strand is opposite the 3' end of the complementary strand. Therefore, the DNA strand that the RNA primer attaches to must be read in the opposite direction.The primer sequence for the given DNA strand 3' C CTA G G C T G C AAT C C 5 ' would be 5′ACGUUAGG3′. The other options are not correct : 5′GCCTAGG3′ is the complementary sequence for the DNA sequence on the template strand. 3′GCCTAGG5′ is the same sequence as the DNA sequence on the template strand but written in the opposite direction.5′ACGTTAGG3′ is formed if the primer starts at the second T instead of the first T. 5′GCCUAGG3′ is the same sequence as the DNA sequence on the template strand but written in the opposite direction.

Hence, at a specific area of a chromosome, the sequence of nucleotides below is present where the chain opens to form a replication fork : 3' C CTA G G C T G C AAT C C 5 ' An RNA primer is formed starting at the underlined T (T) of the template. The primer sequence would be 3)  5′ACGUUAGG3′.

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Answer: codominant

Explanation:

Answer:

A. Goggles

Goggles are used to protect your eyes

Answer: 1. The digestive power of pepsin is greatest at the acidity of normal gastric juice (pH 1.5–2.5). 1.0–2.0

The optimum pH for pepsin activity of 1.0–2.0 is maintained in the stomach by HCl. When the pH of the medium increases to values greater than 3.0, pepsin is almost completely inactivated. 2.  The optimum pH for the enzymatic activity of salivary amylase ranges from 6 to 7. Above and below this range, the reaction rate reduces as enzymes get denatured. The enzyme salivary amylase is most active at pH 6.8.  around 7

Salivary α‐amylase has a short‐lived action. In fact, it is swallowed with chewed food and subsequently inactivated by extremely low gastric pH; amylase in fact has an optimal pH around 7, and the pH of saliva is generally between 6.4 and 7.0.

Explanation: