In two or more complete sentences describe how a dam placed in a river can act as both a constructive and destructive force.

Answers

Answer 1
The good thing about a dam is that electricity can be created by mechanical means. That does not affect the atmosphere. Storing such production is a different matter.

The bad thing about a dam is that it wreaks havoc on the land where the water is stored behind the dam.

Answer 2

Answer:

Dams are constructed over the narrow valleys and it acts like a barrier that obstructs the water from the flow. There are both advantages as well as disadvantages in constructing a dam.

Some of the constructive force or advantages of dams are as follows-

1) It generates electricity .

2) It is often used for irrigation and industrial purposes.

3) it is used for farming purposes in water such as raising as well as harvesting of fishes and other aquatic plants.

Some disadvantages are-

1) It degrades water quality.

2) Aquatic organisms are affected thereby harming the ecosystem.

3) It obstructs the flow of water.

4) Failure of a dam causes flood.


Related Questions

What are the names of the 4 "extensor" muscles of the lower forelimb?

Answers

Muscle extensors are muscles that usually increase the angle between members of a limb. Also, it is joint movement that increases the angle between two bones. 

The four extensor muscles of the lower forelimb were:

Extensor carpi radialis

Extensor digitorum communis

Extensor digitorum lateralis

Extensor carpi ulnaris.

However, these muscle assist in the flexing of the elbow.

What are punnett squares used for?
a. determining the dna sequence of a given gene
b. testing for the presence of the recessive allele
c. predicting the result of genetic crosses between organisms of known genotypes
d. identifying the gene locus where allelic variations are possible
e. more than one of the above?

Answers

Final answer:

Punnett squares are used for predicting the results of genetic crosses between organisms of known genotypes.

Explanation:

Punnett squares are a diagrammatic approach used primarily in genetics to predict the possible genetic outcomes or genotypes in the offspring of a cross between two organisms with known genotypes. In simpler terms, they are used for predicting the results of genetic crosses between organisms of known genotypes. This makes the answer to the question these options (c. predicting the result of genetic crosses between organisms of known genotypes). Although Punnett squares help to understand inherited traits, they do not help in determining the exact DNA sequence of a given gene, identifying the gene locus where allelic variations are possible, or directly testing for the presence of the recessive allele. Thus, only option c is the correct usage of Punnett squares.

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Final answer:

A Punnett Square is primarily used for predicting the result of genetic crosses between organisms of known genotypes. It is not used for determining the DNA sequence of a gene, testing for the recessive allele, or identifying the gene locus where allelic variations are possible.

Explanation:

A Punnett Square is a simple graphical way of discovering all of the potential combinations of genotypes that can occur in children, given the mother's and father's genotypes. To simplify, it's a tool used in biology to predict an outcome of a particular cross or breeding experiment. Specifically relating to the options in your question:

determining the dna sequence of a given gene: This is not what a Punnett Square is used for.testing for the presence of the recessive allele: While a Punnett Square can indicate the probability of a particular allele showing up in offspring, its main purpose isn't specifically for testing the presence of a recessive allele.predicting the result of genetic crosses between organisms of known genotypes: This is essentially what a Punnett Square is used for. It predicts the potential combinations of genetic material in offspring from two parents with known genotypes.identifying the gene locus where allelic variations are possible: While the Punnett Square deals with genetic variations, it isn't used for identifying a gene locus.more than one of the above: Based on the above points, the option 'more than one of the above' would not be applicable.

Looking at all these points the best answer is 'c. predicting the result of genetic crosses between organisms of known genotypes'.

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If the pancreas fails to make___ , it will inhibit the action of enzymes and affect chemical digestion. Also,___ might damage the small intestine walls

Answers

Final answer:

The pancreas produces pancreatic juice and enzymes which aid in digestion in the small intestine. When it fails to do so, it affects chemical digestion and can potentially damage the small intestine walls. The pancreas also works with the liver and the gallbladder for efficient digestion.

Explanation:

When the pancreas fails to produce pancreatic juice, which is enzyme- and bicarbonate-rich, it inhibits the function of enzymes and disrupts chemical digestion in the small intestine. The pancreatic juice helps in buffering the acidic gastric juice in the chyme, which in turn inactivates pepsin from the stomach thereby enabling optimal functioning of digestive enzymes. Furthermore, the pancreas produces protein-digesting enzymes in their inactive forms to prevent digesting the pancreas itself, a situation that arises under a condition called pancreatitis.

Apart from being a critical player in chemical digestion, the pancreas teams with other organs - the liver and the gallbladder, to aid digestion. The liver produces bile, exports it to the duodenum and the gallbladder stores, concentrates, and releases bile. These digestive enzymes and bile together contribute to effective chemical digestion.

If these enzymes were produced in active form, it could lead to damage to the small intestine walls. Hence the pancreas plays an important role in ensuring the optimal function and safety of the digestive system.

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The action of including only some columns for output while retrieving data is known as ____.

Answers

It is known as projecting. Data retrieval means obtaining data from a database management system such as ODBMS. In this case, it is considered that data is represented in a structured way, and there is no ambiguity in data. In order to retrieve the desired data the user present a set of criteria by a query. Project management information system are system tools and techniques used in project management to deliver information. Project managers use the techniques and tools to collect, combine and distribute information through electronic manual means. 

Elaine is a 28-year-old woman pregnant with multiples. she is diagnosed with hyperemesis gravidarum (excessive vomiting during pregnancy). she is unable to keep enteral fluids down. a licensed practitioner orders home iv therapy for 2 weeks. what type of iv access is most appropriate for elaine?

Answers

Answer:
PICC lines are appropriate for long-term therapy and can easily be used in the home environment.

Explanation:
The most appropriate type of IV access for Elaine is a PICC line because the practitioner recommended home IV therapy for two weeks. These lines are actually the most appropriate because they can be used in places such as home environment and for long-term therapy.
A PICC line is a long, thin, flexible tube called a catheter. It is used to give you chemotherapy and other medicines. A doctor or nurse puts it into a vein above the bend of your elbow. It can stay in place until your treatment is over.

Which of these is an environmental effect of burning fossil fuels?

A. temperature increase

B. soil erosion

C. habitat succession

D. flooding

Answers

The answer to this is c

Life is made of different _____, or forms of life.


patterns


organisms


observations


cycles

Answers

B. Organisms

Life is made of different organisms, or forms of life.

Which structure is composed primarily of dense irregular connective tissue?

Answers

Structure D forms the fibrous capsule surrounding the joint cavity
Final answer:

Dense irregular connective tissue mainly comprises the dermis layer of the skin. It's structure and arrangement provide strength and flexibility.

Explanation:

The structure that is composed primarily of dense irregular connective tissue is the dermis of the skin. Dense irregular connective tissue is composed of collagen fibers arranged in an irregular, haphazard manner. This arrangement allows it to resist tension exerted in various directions, providing strength and flexibility. Hence, the dermis, which needs to be flexible yet strong, is mainly made up of this type of tissue.

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Would a karyotype show an autosomal dominant disorder? Why or why not?

Answers

The answer is NO. Karyotypes visualize the structure of condensed chromosomes in the metaphase stage of mitosis. Karyotype is good at diagnosing disorders related to chromosome changes such as aneuploidy. However, disorders such as autosomal dominant cannot be detected by Karyotype since they are caused by nucleotide mutations that do not affect the structure/conformation of the chromosomes.






The answer is

NO

Explanation:

Karyotype is a good option for the diagnoses of disorders related to chromosome changes such as aneuploidy. But disorders such as autosomal dominant cannot be diagnosed by Karyotype because these disorders are caused by nucleotide mutations which do not affect the structure and shape of the chromosomes.


The cell in the figure is a(n)

A. prokaryote.
B. eukaryote.
C. animal cell.
D. both (b) and (c).

Answers

The cell in the figure is D. both (b) and (c)

Answer:

Prokaryote.

Explanation:

Prokayotes are the organism that lacks the well developed nucleus. The organelles of the proaryotes lacks the membrane bound organelle and they have 70'S ribosomes.

The given diagram is of prokaryotes. The prokaryotes contains the cell wall, plasma membrane, pilus and the cilia. The bacteria are included in the prokaryotes and thus the given picture blongs to prokaryotes.

Thus, the correct answer is option (A).

Living things require specific organic molecules in order to survive. The picture above represents some specific examples of foods that are mainly composed of one of these necessary organic molecules. The organic molecules found in these types of food are A) lipids. B) proteins. C) nucleic acids D) carbohydrates.

Answers

The answer it’s not proteins it is carbohydrates don’t worry I know it from experience
Final answer:

Different types of food contain specific organic molecules called macromolecules, including lipids, proteins, nucleic acids, and carbohydrates. These all play vital roles in the body -- lipids supply energy, proteins carry out cellular functions, nucleic acids contain genetic information, and carbohydrates provide immediate energy. The type of macromolecule mainly found in a food can be determined based on its common examples.

Explanation:

The organic molecules primarily found in food are known as macromolecules, and they include lipids, proteins, nucleic acids, and carbohydrates. These molecules are essential for life as they serve several critical functions. Lipids, for instance, supply energy and make up the cell membrane; proteins conduct various tasks in cells and work as enzymes; nucleic acids store and transmit genetic information; and carbohydrates provide immediate energy.

Without the presence of an image to specify the food type, it is difficult to give a definitive answer. However, common examples of food rich in different macromolecules include eggs and avocados for lipids; meat and beans for proteins; fruit and bread for carbohydrates.

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The second phase of the general adaptation syndrome (gas) is characterized by ____.

Answers

The second phase of general adaptation syndrome (gas) is characterized by alarm phase, the stage of resistance and the exhaustion stage.  The gas stage gives a description of the both the short and long term emotional and physical effects of stress.  Gas elaborates the relationship between health and stress.

Answer:RESISTANCE!!

Explanation:

adaptive radiation is also known as

Answers

DIVERGENT EVOLUTION

This is where a species will give rise to many species that will appear different externally but similar internally. In evolutionary biology, this usually happen when there is a change in environment, new sources of food, new predators or challenges for the species. This result into speciation and changes in the phenotype of organism depending on their adaptive trait. This can be morphological or physiological trait of adaptation. There are 4 features for adaptive radiation, common ancestry, pbenotype to environment correlation, trait utility and speciation.

PLEASE HELP! ILL GIVE YOU A MEDAL AND FAN YOU!

what is a cladogram? please explain why a scientist would use DNA or protein sequences taken from three different organisms to construct and cladogram,

Answers

A cladogram is a type of graph that shows how closely related different types of organisms are in an evolutionary context. It resembles a tree, with various organisms being placed at the end of each branch. If two organisms have a close common branch, they are more closely related than those who have more distant branches. Since DNA, or corresponding protein sequences are more similar in closely related species, and more different in more distant species, a biologist can use those sequences to numerically determine how closely related three species are.

A dna replication bubble forms at a specific sequence of bases called the ___________. see section 15.3 (page 321) .

Answers

The answer is the origin of replication. This is where the replication bubble is formed. Two opposite replication forks (Y-shaped regions) of DNA are formed when the double helix is unzipped by DNA helicases. Transcription factors, polymerase III and primer then bind to the region to begin transcription.






. No rain is in the forecast, but it’s pouring outside. How could the NWP weather forecast have missed this weather?

Answers

 system for the display and manipulation of weather information at Weather  Offices

do u do the ogburn school program?


cells specialization in the human body is usually due to ?

Answers

different cells within the human body exhibiting different patterns of gene expression.

Hope this helps!

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Compared to white smokers, african-american smokers __________.
a. smoke fewer cigarettes, but carry a higher risk of tobacco-related disorders
b. smoke fewer cigarettes and carry a lower risk of tobacco-related disorders
c. smoke more cigarettes and carry a higher risk of tobacco-related disorders
d. smoke more cigarettes, but carry a lower risk of tobacco-related disorders

Answers

The correct answer is that African-Americans smoke fewer cigarettes but still carry a higher risk of tobacco-related disorders. African-Americans are more genetically predisposed to developing squamous cell carcinoma of the lungs as well as adenocarinoma of the lungs even if they do not smoke or if they smoke less. There is also a higher incidence of COPD and emphysema in African-Americans.

African-American smokers generally smoke fewer cigarettes but have a higher risk of tobacco-related disorders compared to white smokers.

Compared to white smokers, African-American smokers smoke fewer cigarettes, but carry a higher risk of tobacco-related disorders. This is attributed to a combination of factors, including the possibility that African American smokers may absorb more nicotine than white smokers, and may also have differences in how their blood vessels react, rendering them more susceptible to hypertension and heart disease. Additionally, there are significant health disparities between racial groups, with African Americans having higher rates of several chronic conditions.

Which of the following correctly describes how a diagram of cellular respiration would differ from a diagram of photosynthesis? The cellular-respiration diagram would show electromagnetic waves as the final product. The cellular-respiration diagram would show glucose as the main source of energy. The cellular-respiration diagram would show energy stored in large protein molecules. The cellular-respiration diagram would show water as the main source of chemical energy.

Answers

"The cellular-respiration diagram would show glucose as the main source of energy" best describes how a diagram of cellular respiration would differ from a diagram of photosynthesis. Therefore, option B is correct

 - Cellular Respiration: In cellular respiration, glucose is broken down in the presence of oxygen to produce energy in the form of ATP.

 - Photosynthesis: In photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose, storing energy in the chemical bonds of glucose.

 - Differences in Diagrams:

   - Cellular Respiration Diagram: It would illustrate glucose as the main source of energy, depicting the process of breaking down glucose to release energy.

   - Photosynthesis Diagram: It would show sunlight, carbon dioxide, and water as the main inputs, depicting the synthesis of glucose from these components using light energy.

The complete Question is given below:

Which of the following correctly describes how a diagram of cellular respiration would differ from a diagram of photosynthesis?

A. The cellular-respiration diagram would show electromagnetic waves as the final product.

B. The cellular-respiration diagram would show glucose as the main source of energy.

C. The cellular-respiration diagram would show energy stored in large protein molecules.

D. The cellular-respiration diagram would show water as the main source of chemical energy.

In the late 1940's, scientists released a group of chemicals, pyrethroids, to help kill insects in auricular crops. By the year 2000, over 100 insect species were resistant to pyrethroids and scientists had to develop a new plan to kill them. Explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids. A) The toxicity of pyrethroids weakened over time. B) The allele for pyrethroid resistance increased throughout the population. Eliminate C) Pyrethroid resistance became the dominant allele in the insect populations. D) Most insects had the allele for pyrethroid resistance, but it remained masked.

Answers

B. the allele for pyrethroid resistance increased throughout the population because variation exists. 

Answer: The correct answer is-

B) The allele for pyrethroid resistance increased throughout the population.

As per the information in the question, pyrethroids ( a group of chemicals for killing insects in auricular crops) was given by scientist and more than 100 insect species developed resistance against it by the year 2000.

This indicates that in order to survive, certain species of insects developed resistance ( by changing their genome) and the gene variant ( allele) that was responsible for making them resistant against pyrethroids was increased throughout the population.

Thus, these insect species that developed resistance was selected by nature as it favored their survival.

Due to this, scientist had to develop a new plan to kill them.

Thus, option B) is the right answer.

Propose ideas for the development of drugs that could stop viral replication cycles

Answers

One proposal is the use of drugs that target the reverse transcriptase that generates DNA from the RNA (the genetic material of the virus) -before it becomes integrated into host DNA. Another is by inhibiting this integration of the viral DNA into the host DNA by using integrase inhibitors that
Despite major differences in structure to the host, viruses utilize their host cells' enzymes and ribosomes to metabolize and replicate. Therefore, drugs that are effective against viral replication are likely to be toxic to the host as well. Hence, the strategy is to look for process that is unique that happens in virus infected cells but not in uninfected cells. Additionally, finding an enzyme that viruses decoded and that catalyze the process and find ideas for inhibiting replication of the virus.

Evidence that some cones are especially sensitive to red light, others to green light, and still others to blue light is most directly supportive of the ________ theory.
a. opponent-process
b. signal detection
c. young-helmholtz
d. frequency
e. gate-control

Answers

Evidence that some cones are especially sensitive to red light, others to green light, and still others to blue light is most directly supportive of the young-helmholtz theory.

Answer:

The correct answer is c. young-helmholtz

Explanation:

Young-Helmholtz also known as the trichromatic theory of color vision says that there are three photoreceptors present in our eyes that helps in the color vision and each photoreceptor(cone cell) is sensitive to only a particular wavelength of light of the visible spectrum.

Further, they classified the cone cell into blue, green and red cones. Blue cones respond to short wavelength, green cons respond middle wavelength and red cones respond to long wavelength of light.  

So the strength of these three colors incident on cone cells cumulatively interpreted by the brain to determine a visible color. Therefore the right answer is c. young-Helmholtz.  

Intrapleural pressure __________ during expiration.

Answers

Intrapleural pressure is Negative during expiration. 

Intrapleural pressure is the air pressure in the pleural cavity and also exists between visceral and parietal pleurae. This pressure majorly depends on ventilation phase, the volume of the intrapleural cavity and atmospheric pressure. During expiration, the Intrapleural pressure in the pleural cavity becomes less negative which is commonly known as negative pressure.


How does endocytosis differ from the process shown in the transparency?

Answers

Final answer:

Endocytosis is a form of active transport where the cell membrane envelops extracellular materials. Its variations include phagocytosis, pinocytosis, and receptor-mediated endocytosis. It's hard to compare with the process in the transparency without more specific details.

Explanation:

Endocytosis is a form of active transport in a cell which involves the cell membrane enveloping extracellular materials. There are different variations of endocytosis- phagocytosis, pinocytosis and receptor-mediated endocytosis. In phagocytosis, the cell envelops a large particle in a non-selective manner. In pinocytosis, it takes in small particles in the fluid. Receptor-mediated endocytosis is more selective, it occurs when external receptors bind a specific ligand, prompting the cell to endocytose the ligand.

Without knowing the specific process shown in the transparency, it's difficult to directly compare it to endocytosis. However, endocytosis is characterized by the ingesting of materials enveloped in a portion of its cell membrane, which then gets pinched off to form an independent, intracellular vesicle. Depending on the processes shown on the transparency, the differences might be in the nature of substances transported, the mechanism of their transport, or their direction of movement.

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Which organism most likely has 10% of the sun's energy available for its use?
A)Insects
B)Hawk
C)Snake
D)Shrubs

Answers

A) its definitely insects because its not a mouse

Invasive species have a higher reproductive potential than native species.
b.invasive species are keystone species.
c.invasive species are not held in check by the predators and agents of disease that have always been in place for native species.
d.invasive species come from geographically isolated regions, so when they are introduced to regions where there is more competition, they thrive.
e.invasive species are less efficient than native species in competing for the limited resources of the environment.

Answers

Invasive species have a higher reproductive potential than native species, because:

c.invasive species are not held in check by the predators and agents of disease that have always been in place for native species.

A patient with a diagnosis of type 2 diabetes has been vigilant about glycemic control since being diagnosed and has committed to increasing her knowledge about the disease. to reduce her risk of developing diabetic nephropathy in the future, this patient should combine glycemic control with what other preventative measur

Answers

Since the patient is diagnosed with type 2 diabetes, the patient must combine glycemic control with prompt treatment of hypertension and maintenance of healthy blood pressure to reduce her risk of developing diabetic nephropathy. 

In addition, type 2 diabetes has been found to be related to both severities of hyperglycemia and presence of hypertension. 

some leaves modify into spines, how does this modification help plants survive?

Answers

Spines primarily have a protective function in plants. The spines can be sharp, and form a physical barrier against herbivores which may want to feed on the plant. Spines however also have other benefits. The spines on a jumping cactus allow segments of the cactus to stick to passing large animals or humans, thereby allowing the cactus to spread to other areas through asexual propagation. Spines are modified leaves, and spines have a much lower surface area than leaves, and therefore can reduce transpirative loss of water by the plant during harsh droughts. Some trees in alpine regions, such as pine trees, have developed spine-like leaves to prevent the accumulation of snow in the branches.  

Where in a data table should units of measurement be shown

Answers

Since there are no choices, it will be difficult to answer your question.
But let's say these are the choices:

A. in a separate column after the column of data values
B. in parentheses, in the title of the table
C. in the headings of columns that list the data values
D. in a note next to an asterisk, below the table 

Answer – C (In the headings of columns that list the data values)
 In a data table, units of measurement should be indicated in the headings of the columns where the data values are listed. This shows that the indicated unit applies to all the data values listed in the column.

The process of turning molecules that are ingested into forms that are compatible with the organism is _________. (Points : 2)
digestion
absorption
assimilation
circulation

Answers

The correct answer is assimilation. Digestion is breaking down the molecules of food from polymers to monomers, absorption is their cellular intake and circulation is self explanatory.

Assimilation is the process where ingested molecules are turned into forms compatible with the organism, following digestion, absorption, and circulation.

The process of turning molecules that are ingested into forms that are compatible with the organism is called assimilation. After the processes of digestion, absorption, and circulation, assimilation is the final step where food material is appropriated by the cell protoplasm. Digestion involves the mechanical and chemical breakdown of food into smaller molecules through hydrolysis reactions in the mouth, stomach, and small intestine. Once digestion is complete, the nutrients are absorbed, transported by circulation, and finally, they undergo assimilation where they are utilized by the cells for various functions such as energy production, growth, and repair.

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