Biology High School

If PCBs escaped into the river in large amounts and entered the lower levels
of the food chain, what would be the likely outcome?

If PCBs Escaped Into The River In Large Amounts And Entered The Lower Levels Of The Food Chain, What

Answers

Answer 1

Answer:

Over time, PCBs would collect in top predators such as salmon, making them unsafe for human consumption.

Explanation:

PCBs last a long time in the environment before breaking down and may find their way into the food chain. Low levels of PCBs can be found in fish, shellfish, meat, poultry, milk, dairy products, and other foods. Since PCBs have not been made since 1977, the levels in the environment have been declining over the past several years. Predators at or near the top of the food chain (e.g. birds, fish) have the highest levels of PCBs in their bodies.

Related Questions

what is the relationship between heart rate & respiratory rate (impact on oxygen, carbon dioxide & energy levels)​

Answers

USE SOCRACTIC IT WOULD REALLY HELP WITH QUESTIONS LIKE THIS !!

GIVING BRAILIEST!!!!

Give an example of a cause-and-effect relationship in biology.

Answers

Answer: When water is heated, the molecules move quickly, therefore the water boils.

Explanation:

State three factors affecting breathing rate in human beings​

Answers

Answer: age, smoking habits, and size/weight

Explanation:

The older you get, the weaker you'll be, so your breathing will be effected.

If you smoke then your lungs will be effected which will ultimately have an affect your breathing.

If you're really heavy (ex. Over weight) then you will get tired more easily, which will effect your breathing rate.

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Explain and describe complex inheritance.

Answers

Answer:

Complex Inheritance: (inherited) traits that have a genetic component that does not follow strict Mendelian inheritance. May involve the interaction of two or more genes or gene-environment interactions. ( HGPIA)

Explanation:

Based on the phylogenetic tree, which of the following statements is true.

see the following image.

a. Species A was probably much larger than any of the other organisms
b. Species G is extinct
c. Species C is the most recent ancestor of species B and D
d. Species F and G are more closely related than Species B and E

Answers

Answer:

a

Explanation:

Answer:

CORRECT (SELECTED)

Species F and G are more closely related than species B and E.

Explanation:

Species F and G share a more recent common ancestor than species B and

What is the mass of the object on the triple beam balance?

Answers

Answer:

298

Explanation:

because

Answer: 167

Explanation:

100 POINTS!!!!!!!!!!! ( I NEED FAST ANSWERS ) Why do we use uranium for nuclear energy?

Answers

Answer:

Uranium is the fuel most widely used by nuclear plants for nuclear fission. ... Nuclear power plants use a certain kind of uranium, referred to as U-235, for fuel because its atoms are easily split apart. Although uranium is about 100 times more common than silver, U-235 is relatively rare.

Explanation:

i looked it up

Answer:

In a nuclear reactor the uranium fuel is assembled in such a way that a controlled fission chain reaction can be achieved. The heat created by splitting the U-235 atoms is then used to make steam which spins a turbine to drive a generator, producing electricity.

Explanation:

I pretty much covered it in the answer!

Pls Brainliest! It would mean a lot! ;)

Give an example of a hypothesis not mentioned.

Answers

an observation is when you have a material in front of you and you are reviewing the info a hypothesis is before you really know anything about this subject and you were making kind of like predictions i hope this helps

1. Law is something that has been proven through experimentation. theory is a hypothesis that is supported by laws (facts.)

2. An Observation is info that you log through your senses. A hypothesis is what you predict will happen based on your Observations.

3. Examples not given.

compare the characteristic features of animals and plants

Answers

plants and animals are both living

some plants make there own food while animals have can not make there own food


Q 9. How do the heart and the lungs work together?

Answers

they work together to ensure the body has oxygen in its blood to make sure it functions properly
The heart and lungs work together to make sure the body has the oxygen-rich blood it needs to function properly. The Pulmonary Loop The right side of the heart picks up the oxygen-poor blood from the body and moves it to the lungs for cleaning and re-oxygenating.

3. How does ATP provide energy to your body?

Answers

Answer:

ATP(or Adenosine Triphosphate) provides energy to your body because it is a chemical that takes energy from the food you eat and turns it into energy your body can absorb. So because of this, it is considered a source of energy.

Please sort between in animal cells in plant cells or in both.
Cell membrane
Cell wall
Cytoplasm
Mitochondrion
Chloroplasts
Vacuole
Ribosomes
Golgi Apparatus
lysosomes
Endoplasmic reticulum

Answers

Answer:

plant :cell wall,chloroplasts

animal:lysosome

both:cell membrane

mitochondria,golgi apparatus,cytoplasm,vacuole,ribosome,endoplasmic reticulum

Explanation:

what is convection in the atmosphere called ? please answer quick !!

Answers

Answer:

Atmospheric convection.

Explanation:

Atmospheric convection is the result of a parcel -environment instability, or temperature difference, layer in the atmosphere.

Hope this helps! Have a great day! :)

Troposphere is the answer to your question

When two molecules are put in the same container they do not attract each other. Why does this happen?

a.they are both polar
b. they both contain oxygen
c. one is polar one is nonpolar
d. they contain different elements

Answers

D just took the test , yesterday

Answer:

The correct answer is C.

C. One is polar one is nonpolar 

Explanation:

two martians, betty and ben want to have a child. they both have one eye but are hoping to have a three eyed baby. is this possible?

Answers

Answer:Yes

Explanation:

Only if someone down their bloodline has had 3 eyes. It would be possible, but highly unlikely.

What is the difference between poison and medicine? How can we use science to figure out the difference.
Will mark u brainliest.

Answers

Answer:

not sure how to go about this question so if I'm wrong please tell me

Explanation:

The difference between poison and medicine is that poison is used to harm to one's health whether its an animal or human while medicine is used to cure an illness or an injury. We can use science to figure out the difference by testing the substance on an animal or stem cells of a human scientists do this various times to be assured of its outcome.

PLEASE ANSWER THESE QUESTIONS COMPLETELY!!! WILL MARK BRAINLIEST!!!
Questions:
A. Is the suspect guilty of the crime?
B. How do you know?

Answers

Answer:

A. No

B. because, the suspect doesn't add up to any of the DNA of the killer, victim, or the control, so no the suspect is definetly not guilty and is definetly not the killer. It just wouldn't add up right, none of the other's DNA matches to the suspect, leaving the suspect as not guilty but inisent and doesn't lead or match that suspect to in any way the killer. In other words the killer and suspect don't link in any way!

Explanation:

Hope I helped in any way that you were looking for in this answer! :)

what is the function of Motor Proteins

Answers

Answer:

Motor proteins propel themselves along the cytoskeleton using a mechanochemical cycle of filament binding, conformational change, filament release, conformation reversal, and filament rebinding.

Hope this helps :)

a drawing or diagram is an example of a(n) ____ model.​

Answers

Can you please add the picture of that model that which type of you want

Number 15 which of the following is a function of carbohydrates?

Answers

Answer:

Option (c) cell wall.  

Explanation:

Carbohydrates helps to forms the cell wall.  Cellulose is a carbohydrate and it is found the plant cell wall.

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Q: What is a controlled variable? Give an example

(BTW if u can let me know if the answer is from google so I can put it in my own words, if it's not also let me know! if you don't it's fine! , works either way!)

Answers

Answer:

A control variable is the variable in the experiment that does not change.

Explanation:

If you are testing how seeds grow in different types of water, and you add 1tbps of salt to one pot of water with the plant, and then added 2tbps to another pot of water with the plant. The control variable in this experiment would be the water with no salt because it was not altered.

FYI I did not pull from google. Good luck!

Which molecules may diffuse across a cell membrane without the expenditure of energy or the use of membrane proteins?

Answers

Explanation:

In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins, glucose and charged particles called ions cannot pass through the selectively permeable membrane


Why is the series of reactions in the Calvin cycle called a
"cycle”?

Answers

Answer:

You can think of the Calvin cycle as being somewhat like a sugar factory within a chloroplast. It is called a cycle because, like the Krebs cycle in cellular respiration, the starting material is regenerated each time the process occurs. In this case, the starting material that gets regenerated is a compound called RuBP, a sugar with five carbons.

With each turn of the Calvin cycle, there are chemical inputs and outputs. The inputs are carbon dioxide from the air and the ATP and NADPH produced by the light reactions. The Calvin cycle uses carbon from the carbon dioxide, energy from the ATP, and high-energy electrons and hydrogen ions from the NADPH. The cycle's output is an energy-rich sugar molecule. That sugar is not yet glucose, but a smaller sugar named G3P. The plant cell uses G3P as the raw material to make glucose and other organic molecules it needs.

Explanation:

You can follow the process of the Calvin cycle in the figure.

The series of reactions in the Calvin cycle are called a cycle because it involves inputs and outputs.

The Calvin cycle simply refers to the process that algae and plants use in turning carbon dioxide into sugar. The Carbon cycle is made up of steps such as Carbon fixation, reduction phase, carbohydrates formation, and the regeneration phase.

The series of reactions in the Calvin cycle are called a cycle because it involves inputs and outputs. The input molecules are ATP, carbon dioxide, and NADPH. On the other hand, the output molecules are ADP, sugar, and NADP.

Read related link on:

https://brainly.com/question/2366899

.

Which is not needed for facilatated diffusion?

Answers

Answer: energy is not needed

Answer:

Chemical energy from the ATP hydrolysis in the transport stage.

Explanation:

molecules and ions move their own concentrate resulting in the radiant reflecting its nature.

Predict what would happen to the wolf and elk populations if there was a drought that caused many of the plant species to dry up and/or die.

Answers

Answer:the elk would die because there would be no plants left and then the wolf would die to because there would be no more elk

Explanation:

If a drought were to cause many plant species to dry up and die, it would have indirect effects on the populations of wolves and elks, which are interconnected through a predator-prey relationship.

The drought leads to a scarcity of water, which affects plant growth. Many plant species, including grasses and shrubs that serve as food sources for elks, dry up and die due to the lack of water.

With the decline in plant food sources, the elk population would face food scarcity. The reduced availability of vegetation would result in limited feeding opportunities for elks, potentially leading to malnutrition and weakened individuals.

Therefore, it's important to note that the specific outcome may vary based on the severity and duration of the drought, the overall ecosystem resilience, and the presence of alternative food sources or migration possibilities for elk and wolf populations.

For more details regarding drought, visit:

https://brainly.com/question/26694292

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I NEED HELP ASAP! (Picture is attacted) You Dha Real One IF YOU DO!

Answers

I think your answer is C

Which of the following is a molecule when broken down to a simple particle?
O gold
O nitrogen
O water
O francium

Answers

Nitrogen I believe is the right answer

What are bulging of eyeballs?

Answers

Answer:

bulging nose

Explanation:

In a phospholipid, the ionic head is _____ and the lipid tail is ______

Answers

hydrophilic; hydrophobic

What principle can be applied to all chemical reactions?

A) conservation of mass
B) reactants formed from products
C) energy loss theory
D) coefficient principle

Answers

A. Conservation of mass
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Roca, Inc., manufactures and sells two products: Product M6 and Product X7. The company has an activity-based costing system with the following activity cost pools, activity measures, and expected activity: Activity Cost Pools Activity Measures Estimated MOH Cost Expected Activity Product M6 Product X7 Total Labor related DLH $152,100 3,000 4,800 7,800 Product orders orders $63,035 400 300 700 Order size Machine hours $505,452 3,700 3,600 7,300 The total overhead to be applied to Product X7 using activity-based costing is closest to: 1. Why did the early mining companies fail to protect the miners fromthe lead in the gold dust?A. They were only interested in making money.B. They did not know that the dust was dangerous.c. They were more concerned with supplying the local villageswith water.D. It was impossible to remove the lead. A bucket holds 10 potatoes. Hal removes and cleans 4 potatoes per minute.Write the explicit definition for the sequence that represents the potatoes leftin the buck after n minutes ? Evaluate the expression if m=4 n=3 and p=25m-4n+p= In which relationship stage are the individuals in the following scenario?Quentin and Spencer have both been on the basketball team for the last four months. Whenthey talk about their practices or upcoming games, they often make jokes or refer to things thattheir friends who are not on the team don't always understand.bondinginitiatingintensifyingexperimentingintegrating In a quadratic equation a^2+ bx + c = 0, why is it that the value of a cannot be equal to zero? 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What is the product?254X 47O 11,618O 11,818O 11,838O 11,938 HELPPPP PLEASE I ONLY HAVE 6 MINUTES LEFT HELP ME Read this short passage and answer the question below:Excerpt from The Little MermaidBy Hans Christian Andersen"Come, little sister," said the other princesses; then they entwined their arms and rose up in a long row to the surface of the water, close by the spot where they knew the prince's palace stood. It was built of bright yellow shining stone, with long flights of marble steps, one of which reached quite down to the sea. Splendid gilded cupolas rose over the roof, and between the pillars that surrounded the whole building stood life-like statues of marble. Through the clear crystal of the lofty windows could be seennoble rooms, with costly silk curtains and hangings of tapestry; while the walls were covered with beautiful paintings which were a pleasure to look at. In the center of the largest saloon a fountain threw its sparkling jets high up into the glass cupola of the ceiling, through which the sun shone down upon the water and upon the beautiful plants growing round the basin of the fountain. Now that she knew where he lived, she spent many an evening and many a night on the water near the palace. She would swim much nearer the shore than any of the others ventured to do; indeed once she went quite up the narrow channel under the marble balcony, which threw a broad shadow on the water. Here she would sit and watch the young prince, who thought himself quite alone in the bright moonlight. She saw him many times of an evening sailing in a pleasant boat, with music playing and flags waving. She peeped out from among the green rushes, and if the wind caught her long silvery-white veil, those who saw it believed it to be a swan, spreading out its wings.Based on details in the story, the reader can conclude that the little mermaid A) cares more about humans than her sisters do B) loves the beauty of the princes palace more than her home C) is unhappy with her life below the sea D) is too shy to try and talk to the prince plzz help Carefully read the passage from the Quran here. In a well-structured paragraph, write a summary that describes three main ideas in the passage.