you will analyze data collected from a lab to explain the concept of toxicity and demonstrate how to calculate the ld50 for a particular organism. be sure to read the lab completely before beginning your investigation. submit your completed assignment according to your teacher's instructions. background: ld50 it is important for environmental scientists to examine the influence of toxic substances on organisms. this does not mean that they superfluously expose organisms to hazardous materials; this means that they learn to recognize what levels of substances become threats in order to take preventative measures. lc is shorthand for lethal concentration. typically, lc refers to toxic chemicals found in the air, but in environmental science the lc is also used when studying toxic chemicals found in water. lc50 is the concentration of toxin that kills 50% of the observed organisms. when testing for lc50, scientists must consider, those organisms that die of natural causes versus those organisms that die due to the concentration of toxins present. to account for this, many trials are conducted at several concentrations to account for errors. the commonly used term to describe ingestion toxicity is ld50. ld means lethal dose and the subscript 50 means that the dose was lethal to 50% of the animals to which the chemical was administered under controlled laboratory conditions. ld50 values are measured from zero up, therefore, the lower the ld50, the more toxic the chemical. therefore, a chemical with an oral ld50 of 500 would be much less toxic than a chemical with an ld50 of 5. ld50 values are expressed as milligrams per kilogram (mg/kg), which means mg of chemical per kg of body weight of the animal. mg/kg is the same as ppm.

Answer:

Corruption is defined as the act of misuse of public power and authority for personal benefits. Corruption includes activities like bribery, nepotism, etc. Corruption is a crime because:

Answer:

True

Explanation: It teaches us to think about what goings around us and many other things, so yes, it is bildungsroman genre

Answer:

A group of people living with in a peace by following each other religions is called a society .

society a place where people live together without conflict without cast religion traditional discrimination

Psychologists may be discouraged from addressing cultural variables in research due to several reasons. These include ethnocentrism, inadequate knowledge, inadequate training, lack of funding, methodological challenges, and difficulties in obtaining informed consent.

Ethnocentrism: Ethnocentrism is the belief that one's culture is superior to others. It makes it difficult for researchers to understand the beliefs, values, and behaviors of other cultures. As a result, they may avoid researching cultural variables altogether.

Inadequate knowledge: Psychologists may be discouraged from studying cultural variables if they lack adequate knowledge about the culture they are researching. Without sufficient knowledge, researchers may misinterpret data or fail to understand the significance of cultural variables.

Inadequate training: Without adequate training, researchers may not understand how to design and conduct culturally sensitive research. This may lead to methodological problems, such as the inappropriate use of instruments or failure to recruit representative samples.

Lack of funding: Research involving cultural variables is often expensive, particularly when it requires a large sample or involves complex study designs. This can be a major deterrent for researchers who lack adequate funding.

Methodological challenges: Research on cultural variables presents unique methodological challenges. Researchers may face difficulties with translation, instrument adaptation, and selection of culturally appropriate measures.

Difficulties in obtaining informed consent: Researchers must obtain informed consent from study participants. However, in some cultures, obtaining informed consent can be challenging due to language barriers or cultural practices that may limit the ability to give consent. This can make it difficult for researchers to conduct culturally sensitive research.

Learn more about Ethnocentrism: https://brainly.com/question/11786995

#SPJ11

Answer:

1) A

2)D

3) A

4)D

5)C

6)A

7)D

8)B,D and A

9)A

10) A

______________

1-  true

2-false

3-false

4-true

5-false

1- Globalization affects the nature of the food supply chain, thereby altering the quantity, type, cost, and desirability of foods available for consumption. ... This convergence-divergence duality raises the policy concern that globalization will exacerbate uneven dietary development between rich and poor.

2-Many critics have also pointed out that globalization has negative effects on the environment. Thus, the massive development of transport that has been the basis of globalization is also responsible for serious environmental problems such as greenhouse gas emissions, global warming or air pollution.

PLEASE MARK ME AS BRAINLIEST

Answer:

) A

2)D

3) A

4)D

5)C

6)A

7)D

8)B,D and A

9)A

10) A

Explanation:

Answer:

Sicily

Explanation:

Ceres looked everywhere for her daughter, but no one knew where to find Proserpine until she came to Cyane's pool and saw Proserpine's scarf floating on the water. Furious that no one could help her, Ceres began to destroy the crops of Sicily, where she had discovered her daughter's scarf.

The complete or almost complete shift from the heritage language to English in Asian American communities typically occurs by the 2nd generation.

This is due to a combination of factors, including the desire to assimilate and succeed in mainstream American society, as well as the prevalence of English in media, education, and daily life.

However, it is important to note that this shift is not always uniform across all Asian American communities, and there are still many individuals and families who maintain strong connections to their heritage language and culture.

Additionally, efforts to preserve and promote heritage languages are becoming increasingly important as Asian American communities continue to grow and evolve in the United States.

For more such questions on heritage language

brainly.com/question/30251305

#SPJ11

Ellen West's case is significant because it highlights the complex and sensitive nature of mental health disorders and how they can manifest in various ways.

Ellen West suffered from anorexia nervosa, a condition that is characterized by an extreme fear of gaining weight, leading to severe weight loss and malnutrition. Ellen's case brings to light the importance of understanding the individual's perception of their condition and how it affects their life.

Ellen's case also emphasizes the importance of approaching mental health issues holistically, involving a range of professionals such as psychiatrists, nutritionists, and therapists. It underscores the need for collaboration and coordination between healthcare providers, to ensure that patients receive the appropriate care and support they require.

Additionally, Ellen West's case highlights the stigmatization and misconceptions surrounding mental health disorders, particularly those related to eating disorders. It is essential to recognize that anorexia nervosa and other eating disorders are not simply a matter of willpower, but rather complex mental health disorders that require understanding, compassion, and specialized care.

Overall, Ellen West's case serves as a poignant reminder of the significance of mental health awareness and the need to prioritize the wellbeing of individuals suffering from mental health disorders. It is essential to approach these conditions with sensitivity, empathy, and a comprehensive approach that involves collaboration between healthcare providers and the individual.

To know more about mental health issues, refer to the link below:

https://brainly.com/question/29981809#

#SPJ11

The "genetic history" (in which every gene capabilities) is described as the genotype of all other associated genes which could engage with the gene of interest, and therefore doubtlessly influences the precise phenotype.

The genetic background represents all the genes within the genome. The results of “background” genes are frequently considered with reference to their capability to influence or regulate the effects of mutations artificially generated through the experimenter in model organisms along with the mouse.

Heredity refers back to the genetic heritage handed down by way of our organic parents. it's why we seem to like them! more especially, it is the transmission of traits from one era to the next. these tendencies can be physical, consisting of eye coloration, blood kind or a disorder, or behavioral.

Genetics is the study of genes. Our genes deliver records that receive handed from one technology to the next. for example, genes are why one child has blonde hair like their mother, whilst their sibling has brown hair like their father.

Learn more about the genetic background here:

https://brainly.com/question/28943659

#SPJ4

The Columbian exchange had a significant impact by allowing for the exchange of plants, animals, and other resources between the Old World and the New World. This exchange of plants and animals is known as the Columbian exchange, named after Christopher Columbus, who is credited with starting the exchange.

The movement of plants and animals from their hearths was greatly facilitated by the Columbian exchange. Before the Columbian exchange, the Old World and the New World had very different ecosystems, with different plants and animals. The Columbian exchange allowed for the introduction of new plants and animals to these ecosystems, which had a significant impact on the movement of plants and animals from their hearths.

For example, the introduction of new crops, such as corn and potatoes, to the Old World had a significant impact on agriculture and the movement of plants from their hearths. Similarly, the introduction of new animals, such as horses and cattle, to the New World had a significant impact on the movement of animals from their hearths.

Overall, the Columbian exchange had a significant impact on the movement of plants and animals from their hearths, as it allowed for the exchange of new plants and animals between the Old World and the New World.

Learn more about The Columbian exchange brainly.com/question/9813

#SPJ11

Answer:

The answer to the first question:

People from Central and Northeast Asia moved to North America following the Ice Sheet that covered the area, including the Bering Strait, which at the time as a land bridge made of ice.

People from the Middle East emigrated to Northern Mesopotamia because the climate there is milder, and the land is very fertile.

Answer to the second question:

Society first becomes semi-nomadic, usually because it domesticates a few animals and plants. Then, it becomes fully sedentary.

The division of labor appears: some people work on the fields all day, while others raise animals, and others cook food.

Agriculture produces more food than hunting and gathering, so food surpluses lead to greater wealth, which tends to be appropriated by an elite: the ruling class.

Social stratification develop, which brings greater complexity to society, bringing about civilization.

According to thomas wentworth higginson, art and science option . d. could not be allowed to undermine revealed truth according to the scriptures.

About Thomas Wentworth Higginson, he is known for his role as commander of black troops during the Civil War, his active participation in the abolitionist movement, his affiliation with the Transcendentalists, his role as officiator at the radical wedding of Lucy Stone and Henry Blackwell, and his work as an inventor and editor of Emily Dickinson's poem.

These are the things for which he is most well-known. Less notable is her deep rooted safeguard of ladies' freedoms.Because of his extraordinary spiritual awareness, Thomas Wentworth Higginson devoted the majority of his remaining life to fighting for the liberated, women, and disenfranchised's rights. The correct option is D.

Learn more about Thomas Wentworth Higginson at

https://brainly.com/question/30488554

#SPJ4

Answer: Life expectancy

Explanation:

Life expectancy is the expected number of years of life remaining at a given age determined statistically.

According to the Focus on Neuroscience box, studies has shown that participants who were sleep-deprived were often likely to experience higher levels of activation in Amygdala.

The cognitive and emotional functions are severely impaired when we don't get enough sleep. Sleep deprivation (SD) reduces amygdala-medial prefrontal cortex connection and increases amygdala responsiveness to emotional stressors.

Sleep deprivation modifies the sensitivity of the anterior insula and salience-detection network to a range of valence-strong emotional cues. It is possible to distinguish between different levels of emotional salience when one is well-rested and has a broad and dynamic range of salience-detection sensitivity.

Know more about Amygdala here

https://brainly.com/question/9888781

#SPJ4

Answer:

21.8 is answer

please mark me brainliest and follow me my friend.

Answer:

While King Solomon reigned there was peace, but when he died the peace had stopped. The kingdom then split to the north half Israel and the south half Judah

Explanation:

The first statement is true: If triangles ABC and DEF have congruent corresponding parts (angles and sides), then the triangles are congruent.

In this case, if angle A is congruent to angle D, side AB is congruent to side DE, and angle B is congruent to angle E, then triangles ABC and DEF are congruent. This follows the Side-Angle-Side (SAS) congruence criterion.

The second statement is false: If triangles ABC and LMN are similar, the ratio of corresponding sides is equal, but it does not imply that the ratio of corresponding segments within the triangle is also equal. Therefore, it is not true that AB/LM is equal to BC/MN. As an example, consider two similar triangles with AB = 4, BC = 6, and LM = 2, MN = 3. The ratio of corresponding sides is 2:3, but the ratio of corresponding segments AB/LM and BC/MN is not equal (2/2 ≠ 6/3).

The third statement is false: Two triangles with the same perimeter do not necessarily have the same area. The area of a triangle depends on both the length of the base and the height. Two triangles with different side lengths but the same perimeter can have different base and height measurements, resulting in different areas. For example, consider a right-angled triangle with sides 3, 4, and 5 (perimeter = 12) and an equilateral triangle with sides 4 (perimeter = 12). These triangles have the same perimeter but different areas (6 and 6.928, respectively).

In summary, the first statement is true based on the SAS congruence criterion. The second statement is false because similarity of triangles does not guarantee the equality of corresponding segments within the triangles. The third statement is false since triangles with the same perimeter can have different areas depending on the lengths of their sides and the height.

Learn more about perimeter here:

brainly.com/question/30252651

#SPJ11

Answer:

b

Explanation:

Sustainable growth refers to a pattern of economic growth that meets the needs of the present while not compromising the ability of future generations to meet their own needs.

The 21st century has provided opportunities to focus on sustainable growth in a variety of ways. These are the sustainable growth methods that can be done in the 21st century:

1. Renewable Energy: One of the main factors of sustainable growth is renewable energy. Renewable energy sources include solar, wind, hydroelectric, and geothermal. These sources of energy are sustainable because they can be replenished naturally and have less of an impact on the environment. They are also more cost-effective than traditional energy sources like coal and oil.

2. Sustainable Agriculture: Another method of sustainable growth is sustainable agriculture. Sustainable agriculture refers to a system of farming that is environmentally friendly, economically viable, and socially responsible. This includes practices like crop rotation, using natural fertilizers, and minimizing the use of chemicals. Sustainable agriculture is important because it helps to reduce the environmental impact of farming while also producing healthier food.

3. Circular Economy: A circular economy is a system of production and consumption that focuses on the reduction, reuse, and recycling of materials. This approach helps to reduce waste and minimize the environmental impact of production. This includes practices like recycling, composting, and repurposing. A circular economy is important because it helps to reduce waste and minimize the environmental impact of production.

4. Sustainable Transportation: Sustainable transportation refers to methods of transportation that are environmentally friendly and energy-efficient. This includes public transportation, biking, and walking. Sustainable transportation is important because it helps to reduce greenhouse gas emissions and air pollution.

5. Green Buildings: Green buildings are buildings that are designed to be environmentally friendly and energy-efficient. This includes features like natural lighting, energy-efficient heating and cooling systems, and green roofs. Green buildings are important because they help to reduce energy consumption and minimize the environmental impact of construction.

Learn more about Sustainable growth: https://brainly.com/question/14806068

#SPJ11

Answer:The Treaty of Paris

Explanation:The Treaty of Paris of 1763 ended the French and Indian War/Seven Years' War between Great Britain and France, as well as their respective allies.

Hope this helps!! Brainlist?plz?

A.  

affirmed the independence of the United States

B.  

established a government for the United States

C.  

provided for an exchange of prisoners of war

D.  

restored Florida to Spanish control

E.  

returned the Louisiana Territory to the French

Which 3 is it?

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

Economic geography is the subfield of human geography which studies economic activity. It can also be considered a subfield or method in economics.

Economic geography takes a variety of approaches to many different topics, including the location of industries, economies of agglomeration (also known as "linkages"), transportation, international trade, development, real estate, gentrification, ethnic economies, gendered economies, core-periphery theory, the economics of urban form, the relationship between the environment and the economy (tying into a long history of geographers studying culture-environment interaction), and globalization.

REAL NAME - SHRESTH DUBEY

Answer:

Option: to respect and obey their fathers' wishes

Explanation:

Confucius, a great Chinese philosopher, played a key role by explaining the purpose of men, women, and children in society and family. According to him, children should respect their parents. Respect for parents is necessary for the benefit of the person and gaining status in society. Children should always obey parents as they are older and wiser who would want their children in their best.

In the figure-ground relationship, one has a tendency to perceive objects C as existing on a background.

The figure-ground relationship refers to the perceptual process of differentiating between a focal object (the figure) and its surrounding background. Our perceptual system automatically assigns an object as the figure that stands out or appears to be in the foreground, while the rest of the visual field is perceived as the background.

Option A, which suggests objects switching back and forth, is not a typical characteristic of the figure-ground relationship. Once the figure and ground are initially perceived, they tend to remain stable.

Option B, regarding objects close to one another being part of the same grouping, relates more to the principle of proximity in Gestalt psychology, which emphasizes the grouping of elements based on their proximity.

Option D, stating that similar-looking objects are perceived as part of the same group, relates more to the principle of similarity, another concept within Gestalt psychology that focuses on grouping similar elements together.

Therefore, option C accurately describes the tendency to perceive objects as existing on a background, highlighting the figure-ground relationship.

learn more about figure-ground relationship here

https://brainly.com/question/30653951

#SPJ11

The statement regarding the division of the Whig party into Conscience Whigs and Conservatives in the mid-1850s is:

b. Conscience Whigs opposed slavery; conservatives opposed the Compromise of 1850.

The Conscience Whigs, a faction within the Whig party, were fervently against slavery and actively advocated for its abolition. Their opposition to slavery stemmed from deep-seated moral and ethical convictions.

On the other hand, the Conservatives within the Whig party, often known as Cotton Whigs, held a more moderate stance when it came to the issue of slavery.

While the Conservatives within the Whig party did not actively promote the expansion of slavery, they were willing to seek compromises and ultimately accepted the Compromise of 1850.

The Compromise of 1850 was a package of legislative measures designed to address the contentious issue of slavery and maintain a delicate equilibrium between free states and slave states.

While the Conservatives did not advocate for the expansion of slavery, they were willing to accept the compromise as a means of preserving the Union and avoiding further conflict.

The position taken by the Conservatives within the Whig party regarding slavery reflected a more moderate standpoint compared to the strong opposition of the Conscience Whigs.

The Conservatives sought to find a middle ground by embracing the Compromise of 1850, which aimed to appease both pro-slavery and anti-slavery factions within the party, albeit with varying levels of enthusiasm.

The divergence between the Conscience Whigs and the Conservatives concerning slavery played a crucial role in the decline and eventual downfall of the Whig party.

Their contrasting stances on the issue created internal divisions that ultimately weakened the party and contributed to its eventual collapse.

The growing tensions over slavery ultimately led to the formation of new political parties, such as the Republican Party, which emerged as a strong anti-slavery force in the years leading up to the American Civil War.

The question should be:

In the mid 1850s, the Whig party divided into two parts namely, Conscience Whigs and Conservatives based on the following lines:

a. Conscience Whigs were pro tariff and conservatives were otherwise not pro tariff.

b. Conscience Whigs opposed slavery; conservatives on the other hand embraced the Compromise of 1850.

c. Conscience Whigs were generally Southerners; conservatives were from the North inhabiting people

d. Conscience Whigs wanted to ban immigration; conservatives supported limitations on immigration but not an outright ban of the same.

e. Conscience Whigs were in favor of government-sponsored internal improvements; conservatives believed states should pay for their own improvements

Learn more about Whig party at: https://brainly.com/question/589990

#SPJ11

Answer:

from what government

Explanation:

Answer:

It was a generation of people who had grown up with the faith of self-reliance, that people had to stand on their own two feet.

hope this help!!:)

Explanation:

Using only these supplies, the question can Michelle investigate with an experiment is Does a tablet charge faster with a two-foot-long charging cable or a five-foot-long charging cable? The correct option is b.

A charging cable for a smartphone or other portable device. The cable has a device connector on one end and plugs into the socket of a USB charger on the other (Mini USB, Micro USB, Apple dock connector, etc.).

Your smartphone and tablet will use cables and ports that are either micro-USB and USB-C on one end and USB-A on the other. You can learn more about the USB type that your device employs. Some cables that come via older models will only have the plug and not the USB-A connector. These plugs are typically much lower in amperage.

Learn more about cable, here:

https://brainly.com/question/25177717

#SPJ1