What is a primary source

Answers

Answer 1

Answer: It's a document, or first-hand account. This source provides direct evidence to your object of study.

Explanation:

Answer 2

Answer:

A primary source is a source that is first hand accounted.

Explanation:

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Related Questions

FIRST PERSON TO ANSWER GETS BRANLYSEST After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Insulin helped the sugar move from his blood into cells, so his blood sugar levels decreased. Which statement explains what happened next? Positive feedback caused his pancreas to stop secreting insulin. Negative feedback caused his pancreas to stop secreting insulin. Negative feedback caused his pancreas to produce more insulin. Positive feedback caused his pancreas to produce more insulin.

Answers

Answer:

The correct answer B

When the body gets the glucose, the glucose in the blood increase then the hormone insulin is released so that the glucose from the blood can be transferred from blood into the cells of the body.

The release of hormone insulin is a positive feedback.

Once the glucose is transferred into the cells of the body then the negative feedback starts acting that stops the secretion of insulin from the pancreas.

What will happen next is that negative feedback would cause his pancreas to stop secreting insulin.

The maintenance of relatively constant internal body processes depends largely on negative feedback.

Negative feedback mechanisms ensure that setpoints are returned.

Hence, whatever causes setpoints to be breached is reversed or removed totally.

In this case, the continuous secretion of insulin will further lower the blood sugar level and causes the setpoint to be breached further. Thus, the actuator (insulin) has to be removed.

More on negative feedback can be found here:   https://brainly.com/question/15379119?referrer=searchResults

Approximately how long ago did our current era begin ? O A. 1 million years OB. 4.5 billion years C. 65 million yearsO O 100, 000 years

Answers

Answer:

C. 65 million years ago

Explanation:

The current locations of the continents and their modern day inhabitants, including humans, can be traced to this period.

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The
sperm
is the male sex cell.

The
egg
is the female sex cell.

A
forms as a result of fertilization.

Answers

Answer:

hi buddy, here's your answer

fertilization results in the formation of zygote.

Answer:

zygote

Explanation:

Zygote, fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.

hich of the following organisms receives at least some energy from plants?
A.
coyotes
B.
rabbits
C.
deer
D.
all of these

Answers

Answer: B

Explanation: Coyotes and deer dont really eat plants like that but deer do sometimes so my best bet is B or C. I hope this is helpful!!

The oak and the maple are two different species of trees that also belong to different genera. However, these oak and maples do share many characteristics. Based on their similarities, which levels of classification would they share?

Answers

Answer:

Maple and oak trees are both deciduous angiosperms, so the wood each produces is classified as a hardwood. However, the difference between maple and oak wood is significant, and it would be difficult to mistake one for the other. All species of oak display a distinctive well-defined grain pattern whereas the maple wood grain tends to be creamy white with little visible grain. The differences don't stop there, but to really appreciate them, it's important to realize that within the broad category defined by oak is a subset of species that differ significantly from each other. The same is true for maple

Am I right?? I am not sure ... just tryna help

What did Mendel's cross-pollination of pea plants prove?


A. Inheritance of certain factors is dependent upon the genetic code.


B. Certain factors are dominant, and other factors are recessive.


C. All the cells in an organism carry the same hereditary factors.


D. Crossing a tall plant with a tall plant will always result in a tall plant.

Answers

Answer:B

Explanation:

Answer: The correct answer is B- Certain factors are dominant, and other factors are recessive. :)

Explanation:

I took the test. I also had to read a lot about Mendel for my science class.

Hope this helps! <3

The purpose of oxygen in the body is to serve as the

Answers

Answer:

We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy.) What happens in the process of respiration? (Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.

Which human activity is correctly paired with the greenhouse gas that it increases?
rice cultivation and water vapor
landfilling and carbon dioxide
deforestation and methane
sewage treatment and nitrous oxide

Answers

Answer:

D: Sewage treatment and nitrous oxide

Explanation:

e2020 :) Good luck! <3

The correct pairing of human activity with the greenhouse gas it increases is: Deforestation and methane.

What is deforestation?

Deforestation refers to the deliberate or widespread removal of trees and vegetation from forests or woodland areas, leading to the conversion of forested land into non-forest uses. It involves the permanent destruction or clearance of forests, typically for purposes such as agriculture, logging, urbanization, or infrastructure development.

Deforestation has significant environmental, social, and economic implications. It contributes to habitat loss, biodiversity decline, soil erosion, and climate change. Forests play a crucial role in carbon sequestration, regulating the water cycle, and providing habitats for countless species.

Deforestation disrupts these ecological processes and can lead to the loss of invaluable ecosystem services. Efforts to combat deforestation involve sustainable land management, reforestation initiatives, and the promotion of responsible forestry practices.

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Brad steps onto a bathroom scale, exerting a downward push of 150 pounds. What force doel the scale exert onto Brad?

Answers

Answer:

normal force

Explanation:

Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows the probability that 100 percent of offspring will have red eyes?

Answers

Answer:

Which of the following equations are balanced correctly?

2Ag2O → 4Ag + O2

Zn + HCl → ZnCl2 + H2

Cu + H2O → CuO + H2

2C4H10 + 13O2 → 8CO2 + 10H2O

Explanation:

Answer: it’s A

Explanation:

The kingdom Protista contains the greatest variety of organisms, ranging from single-celled creatures to multicellular ones. Some people consider the kingdom Protista to be a
kingdom into which an organism is classified simply because it does not fit anywhere else. What is most likely to happen to this kingdom in the future?
A. This kingdom will likely be changed into a domain
B. This kingdom will likely be further divided into various new kingdoms.
C. This kingdom will disappear.
D. This kingdom will be merged with another one.

Answers

Answer:

b

Explanation:

Chargaffs rule states

Answers

Answer:

Isn't the Chargaffs a DNA of a rule state that have to be 1/1 ratio.

Explanation:

Many fish in the lake die due to an increase in water temperature. What Limiting Factor is this an
example of? *

A. Competition

B. Predation
C. Temperature
D.Natural Disaster

Answers

Answer:

C, Temperature

Explanation:

Increase in water heat, changes the temperature levels for the water itself, and including that it may be even warmer towards the bottom of the lake.

Because the trees that produce the sap to make rubber need to be cut down to make it, rubber is considered a nonrenewable resource.

TRUE

FALSE

Please help me!!

Answers

Answer: false

Explanation:

The raw material of making rubber products is the natural latex we collect from the rubber tree. Therefore, the answer is Yes. The rubber is a renewable resource. What's more, most of rubber products are made by reclaimed rubber.Hope this helps!

PLEASE HELP FAST
_____________ is a nonrenewable fuel created from the remains of living organisms.

Answers

Answer:

Fossil fuel is the answer.

Hope this helps:)

Sry if wrong

Answer:

Oil, NaturAL gAS, OR COAL

Explanation:

why do lichens and mosses get mostly replaced by larger plant species during succession

Answers

Answer:

Lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. Also, as lichens die, they provide some organic matter that also contributes to soil. Mosses can then colonize the thin soil; as mosses die, the soil thickens more allowing other hardy species to colonize

Explanation:

What happens to patients when they are on nevirapine?

Answers

Answer:

Nevirapine can cause serious, life-threatening side effects. These include severe liver problems, skin rash, and skin reactions. Liver and skin problems can happen at any time during treatment with nevirapine.

Explanation:

Answer: Nevirapine can cause serious, life-threatening side effects. These include severe liver problems, skin rash, and skin reactions. Liver and skin problems can happen at any time during treatment with nevirapine, but your risk is greatest during the first 18 weeks of treatment.

mark brainliest

Explanation:

Shoots of growing plants show positive phototropism as they bend towards the light. This bending happens because cells on the shaded side of the shoot grow faster than cells on the lit side of the shoot. Which hormone stimulates cell growth on the shaded side of shoot resulting in its bending towards light? *

• auxin

• cytokins

• gibbereslins

Answers

Answer:

auxin

Explanation:plzz mark me brainliest

this is the correct answer cuz im in 10th grade and i know it

Which of the following identifies the most important reason why the percentage of deaths due to infectious diseases dropped from 1970 to 2015?
Group of answer choices

A.The number of people living in poverty fell as nations became increasingly more developed.

B.More people moved into urban areas, and fewer people remained in disease-prone rural areas.

C.More children were immunized against the major infectious diseases.

D. The use of pesticides became increasingly effective at killing biological threats.

Answers

Answer:

A

Explanation:

I choose A people in one hand really have to come together and make this world a strong, better, and brighter place.

What environmental event in the 1930s led the U.S. government to formalize its soil
conservation policies?

Answers

Answer:

The Dust Bowl.

Explanation:

pleaseeeee helpppppppppp

Answers

Answer:

It would seem to be a feedback mechanism from the looks of it.

Explanation:

And pardon me for asking, don't those videos tell you the answer and you just have to select it?

1pt Which of the following cells would be produced by meiosis?
A. a heart cell
B. an eye cell
C. a sperm cell
D. a skin cell

Answers

Answer: c

Explanation:

because meiosis produces our sex cells

How did removing deer affect the tree population?

Answers

Answer:

By getting rid of the deer the tree population increased, the reason behind this is because the deers ate the plants which made less trees 2. Under Choose organism, select the Mushroom.

Explanation:

Answer: By getting rid of the deer the tree population increased, the reason behind this is because the deers ate the plants which made less trees.

A ______factor is of or pertaining to living organisms.

Answers

Answer:

A biotic factor is a factor that pertains to Living or Once-living things.

Explanation:

Answer:

in the blank would be biotic

Explanation:

How does the carbon in grass become part of a lion?
choose:
The lion eats the grass
Carbon from grass doesn't end up in a lion.
The carbon ends up in the lion's food chain.
The lion breathes in carbon given out by the plant

Answers

Answer:

The carbon ends up in the lion's food chain

Explanation:

Lions just like humans, depends on oxygen to breathe therefore it is not the last option. Lions also don't eat plants, they are carnivores. Members in a food chain are all connected, the only logical answer would be C

Birds, lizards, and amphibians are very different groups of animals. However, these groups share some qualities that help them survive. Which of the following is an example of such a quality? A. Birds, lizards, and amphibians have fur to keep their bodies warm. B. Birds, lizards, and amphibians produce milk to feed their young. C. Birds, lizards, and amphibians reproduce by laying eggs. D. all of these

Answers

Answer:

The answer is C

Explanation:

Brainliest?

Answer:

C.

Most mammals don't lay eggs, but platypuses do

A. Only mammals have fur

B. Mammals produce milk

D. The first two were wrong

Explanation:

HURRY 20 POINTS WILL MARK BRAINILEST

A scientist places four identical cells into four different liquids, each with different concentrations of magnesium. Cell Description of Liquid Result W Slightly more magnesium than the cell Took in magnesium X The least amount of magnesium Took in magnesium Y Slightly less magnesium than the cell Took in magnesium Z The most amount of magnesium Took in magnesium Which shows evidence of active transport? cells W and Z cell W only cell Y only cells X and Y

Answers

Answer:

It’s cells x and y

Explanation:

Answer:

X and Y

Explanation:

Compare variation adaptation of organisms in different ecosystems

Answers

Answer:

In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. Although scientists discussed adaptation prior to the 1800s, it was not until then that Charles Darwin and Alfred Russel Wallace developed the theory of natural selection.

Wallace believed that the evolution of organisms was connected in some way with adaptation of organisms to changing environmental conditions. In developing the theory of evolution by natural selection, Wallace and Darwin both went beyond simple adaptation by explaining how organisms adapt and evolve. The idea of natural selection is that traits that can be passed down allow organisms to adapt to the environment better than other organisms of the same species. This enables better survival and reproduction compared with other members of the species, leading to evolution.

Organisms can adapt to an environment in different ways. They can adapt biologically, meaning they alter body functions. An example of biological adaptation can be seen in the bodies of people living at high altitudes, such as Tibet. Tibetans thrive at altitudes where oxygen levels are up to 40 percent lower than at sea level. Breathing air that thin would cause most people to get sick, but Tibetans’ bodies have evolved changes in their body chemistry. Most people can survive at high altitudes for a short time because their bodies raise their levels of hemoglobin, a protein that transports oxygen in the blood. However, continuously high levels of hemoglobin are dangerous, so increased hemoglobin levels are not a good solution to high-altitude survival in the long term. Tibetans seemed to have evolved genetic mutations that allow them to use oxygen far more efficently without the need for extra hemoglobin.  

Organisms can also exhibit behavioral adaptation. One example of behavioral adaptation is how emperor penguins in Antarctica crowd together to share their warmth in the middle of winter.

Scientists who studied adaptation prior to the development of evolutionary theory included Georges Louis Leclerc Comte de Buffon. He was a French mathematician who believed that organisms changed over time by adapting to the environments of their geographical locations. Another French thinker, Jean Baptiste Lamarck, proposed that animals could adapt, pass on their adaptations to their offspring, and therefore evolve. The example he gave stated the ancestors of giraffes might have adapted to a shortage of food from short trees by stretching their necks to reach higher branches. In Lamarck’s thinking, the offspring of a giraffe that stretched its neck would then inherit a slightly longer neck. Lamarck theorized that behaviors aquired in a giraffe's lifetime would affect its offspring. However, it was Darwin’s concept of natural selection, wherein favorable traits like a long neck in giraffes survived not because of aquired skills, but because only giraffes that had long enough necks to feed themselves survived long enough to reproduce. Natural selection, then, provides a more compelling mechanism for adaptation and evolution than Lamarck's theories.

 

Explanation:There you have it!! Hope its good enough for ya!!

Physical or behavioral characteristics that help an organism fit in with its surroundings are called adaptations. Random mutations result in heritable variation. New heritable features are initially caused by random mutations.

What is adaptation?

The process by which organisms adapt to their environment in order to increase their chances of surviving in that environment is known as evolutionary adaptation, or simply adaptation.

Animals can defend themselves against predators and extreme weather by adapting.

Numerous birds may conceal themselves under long grass, while weeds, insects, and other creatures can alter their color to blend in. Predators find it challenging to locate them in search of food as a result.

Each biome's native plant and animal species have unique adaptations that enable them to endure the environment there.

Numerous species are endemic to particular biomes, which means they can only be found there. Some species can adapt to a greater range of climatic and geographic factors than others.

Thus, these are the variation adaptation of organisms in different ecosystems.

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what air mass carries warm, moist air

Answers

Maritime air masses form over water and are humid.

Answer:Maritime air masses form over water and are humid. Continental air masses form over land and are dry. Therefore, an air mass that develops over northern Canada is called a continental polar air mass and is cold and dry. One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.

Explanation:

5. In a food web in a freshwater ecosystem, shrimp
and mayflies eat water plants. Leeches eat
shrimp. Trout eat mayflies. Which organism is a
producer?

Answers

Answer:

The water plants

Explanation:

Key word, PLANT. All producers take energy from the sun through photosynthesis, only producers can do this.

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Which of the following body systems provides the body the body with the exchange of oxygen and carbon dioxide A physical education class has 21 boys and 9 girls. Each day, the teacher randomly selects a team captain. Assume that no student is absent. What is the probability that the team captain is a girl two days in a row?The probability of choosing a captain that is a girl two days in a row is 9%. Read this sentence.After years of being strongly controlled and restricted,the people were finally emancipated.Use the drop-down menus to answer these questions.From these clues, you can figure out that emancipatedmeansWhich word in this sentence is an antonym ofemancipated? Who is swift ridiculing using satire in a modest proposal Solve for m. 5 5m = 6m m= _ Describe the sequence of events during a blood clot. The original price of a jacket is $75 , you have a 25% off coupon, how much will you pay for the jacket The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and?NaNO2NaNO3NaHNONaHNO3 Four fifths of Japan is covered with these. Which is stronger when using connotation for valued1. appreciated2. treasured3. admired4. favored Can someone answer this question please please help me I really need it if its correct I will mark you brainliest . The growth of a population of bacteria can be modeled by an exponential function. The graph models the population of the bacteria colony P(t) as a function of the time t, in weeks, that has passed. The initial population of the bacteria colony was 500. What is the domain of the function? What does the domain represent in this context? A connotation isthe literal meaning of a wordthe dictionary definition of a word.the amount of rhythm in a word.the emotion or idea associated with a wordSave and Ex What is the negative square root of 4,900? need asapppp !!!!!!! Maxis taking a cross-country road trip. Gas prices vary as the friends travel across the US from $4 dollars per gallon on the east coast, to $3 in the mid-US, to $5 on the west coast. B On their way back they had more baggage in the car and spend $601 for 174 gallons of gas. Based on the same ratio as in Part (a), how many gallons of gas did they buy at each price? Which of the following could be the equation of the function below?On a coordinate plane, a curve crosses the y-axis at y = negative 1.5. It has a maximum at negative 1.5 and a minimum at negative 2.5. It goes through 2 cycles at pi.y = 0.5 cosine (2 (x minus StartFraction pi Over 2 EndFraction)) + 2y = 0.5 cosine (4 (x minus StartFraction pi Over 2 EndFraction)) minus 2y = 0.5 cosine (4 (x + pi)) + 2y = 0.5 cosine (2 (x minus pi)) minus 2 Your engineering firm has been hired as a consultant to evaluate engineered channels to replace an existing natural stream. The existing channel has a length of 1.2 miles with an average bedslope of0.0042ft/ft. Thedesign flowfor this channel is2,250 cfs.The client requests that you conduct a feasibility study to replace the natural stream with a concrete-linedchannel. Base your design on the best hydraulic section and select two of the following section shapes to evaluate:rectangular, trapezoidal, triangular, and half-circularsections.Provide a freeboard of at least 10% of the flow depthat design discharge. Subcritical flowis preferredin the engineered channel. After completing the design of the channel, perform an extreme event analysis by determining the normal depth for a flow of twice the design flow. Discuss ifflooding is an issue for this extreme event. HELPPP I NEED IT I DONT KNOW WHAT TO DO True or False: A major source of income for the Taliban is the drug heroin. Explain your answer.