Biology Middle School

I need help with this question
Why would you expect a dead zone to start near the mouth of a river, where the river flows into a body of water?

I Need Help With This Question Why Would You Expect A Dead Zone To Start Near The Mouth Of A River, Where

Answers

Answer 1
Water pollution comes from many sources. One of the biggest sources is runoff. Runoff moves over the surface of the land and picks up chemicals such as fertilizer (contains vital nutrients such as nitrogen, phosphorous, and potassium - NPK) from agricultural fields, lawns, and golf courses. It carries the chemicals to bodies of water. The added nutrients from fertilizer often cause the excessive growth of algae, creating algal blooms which are temporary phenomena because the large population of algae use up the available nutrients (Figure 2.4c). When the algae die, the decomposing bacteria use up oxygen in the water so that other aquatic organisms cannot survive. This has occurred over large areas of the ocean, creating dead zones, where low oxygen levels have killed all ocean life. A very large dead zone exists in the Gulf of Mexico. Measures that can help prevent these problems include cutting down on fertilizer use. Preserving wetlands also helps because wetlands filter runoff.

Related Questions

EASY POINTS IF YOU ANSWER THEM CORRECTLY!! the questions are easy and I don't feel like doing them but plz answer correctly before 3:00 PM est (will give brainliest to whoever answers all of them at once.) Also ALL QS MUST BE ANSWERED from parts A-C

Answers

Answer:

What subject is this?

Explanation:

Sarah the Cheetah ran a 100 meter dash in 5.95 seconds at the San Diego Zoo, setting a new world record for mammals. What was Sarah's speed in Meters per Second? (Just write the number, rounded to the nearest tenth, no units)

Answers

Answer:

16.3 Meters Per Second

Explanation:

To find out the speed, you need to simplify 100/5.95

To do this, you first round up to 6.

[tex]100/6=50/3=16.333333[/tex] meters per second

Rounded up, it is 16.3 Meters per Second

The Sarah's speed in Meters per Second was 16.3 m/s.

What is speed?

Speed is defined as a measurement of the length of time it takes for an object to travel a certain distance. To increase your strength and begin running more quickly, do sprinting drills and exercises including box jumps, high knees, hill sprints, and other core workouts. Strengthening your entire body can also be accomplished by including some type of strength exercise on your off days. Speed is calculated as follows: speed = distance ÷ time. Knowing the units for distance and time is necessary to calculate the units for speed.

You must simplify 100/5.95 to determine the speed.

In order to do this, multiply by 6.

= 100 / 6

= 50 / 3

= 16.33 meters per second.

It is 16.3 meters per second when rounded up.

Thus, the Sarah's speed in Meters per Second was 16.3 m/s.

To learn more about speed, refer to the link below:

https://brainly.com/question/28224010

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Why does the moon orbit Earth?

Answers

Answer:

because of gravitanal pull

Explanation:

gravitational pull :))

What is the relationship between octopuses and seagulls?

Answers

Their both animals and their both animals

Answer:

The answer is that the relationship between octopuses and seagulls is that they both eat mussels.

Explanation:

Hope this helps!! ;)

How is surface water naturally purified?
A:freezing water destroys impurities

B:evaporation leaves impurities behind

C:sediments precipitate out

D:soil filters the water

Answers

the correct answer is D.

A is wrong because it does not destroy molecules , they cannot be destroyed.

B is wrong because there can still be impurities from the clouds

C is wrong because sediments cannot be precipitated , only water can

The surface water is naturally purified by soils that filters the water. The correct option option is D.

What is soil water filtration?

Soil not only captures water, but it also filters it. Physical, chemical, and biological processes clean the water that flows into and through soil.

When pollutants carried by water become trapped in the small pores of the soil, they are physically cleaned.

Water is cleaned by physical, chemical, and biological processes as it passes through soil.

In addition to its physical filtration capacity, soil contains important biota that helps transform and decompose certain chemicals and other contaminants from soil, thereby aiding in the removal of these contaminants from water.

Groundwater is typically clean and safe to drink. Groundwater is usually free of microorganisms that cause disease because the soil on top acts as a filter.

Thus, the correct option is D.

For more details regarding water filtration, visit:

https://brainly.com/question/16023253

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This is hard. pls help. Write an equation for cellular respiration. Write an equation for photosynthesis. How are these two equations related?

Answers

Answer:

equation for cellular respiration: C6H12O6 + 6O2 + 6H2O → 12H2O + 6CO2

equation for photosynthesis:: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Plants make their own food by photosynthesis. During photosynthesis a plant takes in water, carbon dioxide and light energy, and gives out glucose and oxygen.

Explanation:

Plants make their own food during photosynthesis

Need this for homework
1.What happens when fertilizer ends up in waterways?
2. Describe eutrophication.
3. What has happened at the mouth of the Mississippi River?

Answers

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1. When fertilizer ends up in waterways, the fertilizer gets carried to larger bodies of water. The added nutrients from the fertilizer creates excessive growth of algae, creating algal.

2. Eutrophication is what a water based ecosystem does when too much nutrients are added to it. it’s mainly caused by two nutrients, phosphorus and nitrogen. The biggest problem in eutrophication are algal blooms.

3. At the mouth of the Mississippi River there is a dead zone. Due to algae using up all the oxygen, aquatic organisms can not survive there. Things that can help prevent dead zones are cutting down on fertilizer use and preserving wetlands.


Hope this helps!

BRAINLIEST IF ANSWER QUICKLY

1. Identify a period of time when this population showed exponential growth? Explain how you know this.

2. At what point in time did the population reach its carrying capacity? Explain how you know this.

3. The population's actual growth (in red) often goes above and below the carrying capacity in a cycle, why do you think this happens?

Answers

Answer:

1. 1850

2. it stays on carrying capacity until, about 1835

3. because people are born in generations

Explanation:

1. because the overshoot line grows very quickly around 1850

2. simply an estimate to where i think it lines up

3. once one generation is born, the older one dies.

Answer:

1. Around 1850 is the period of time when the population showed exponential growth.

2. The population reached its carrying opacity technically around 1850 as well but it was much closer to the direct line at around 1870-1875.

3. I believe this happens because of sickness and people choosing to leave the area. (There are many other reasons I am sure you can come up with)

Explanation:

These are the answers that fit best! I a so sorry for taking so long! You should certainly give brainliest to someone else but still-

If you found this to be helpful please leave a thanks, and a rating!

If this answer is correct maybe you can mark my answer brainliest! I hope you do well on your assignment!

~Ace <3

PLS ANSER THIS ASAP!

Answers

Answer:

number 3

Explanation:

i had this quiz and got it right

Answer:

c i think is the most relavent

Fill in the Blank
Complete the following sentence.
The discovery of plastic resulted from a(n) ____________
attempt at making an alternative form of insulation for electronics.

Answers

Failed...
I’m not entirely sure
Cheap, I’m pretty sure it’s right.

Which example is NOT an organism?

Question 1 options:

lung


mold


human


bacteria

Question 2 (3 points)
All living things are made of ______.

Question 2 options:

multicellular


organisms


cells


tissues

Question 3 (3 points)
To function on their own, what must unicellular organisms do?

Question 3 options:

make tissues


work with other cells


do all jobs for survival


perform a specialized task

Question 4 (3 points)
Which type of organism is ale to cause an infection or contagious disease?

Question 4 options:

animal


plant


bacteria


rose

Question 5 (3 points)
A fish laying hundreds of eggs is an example of _________.

Question 5 options:

maintaining structure


all of the answers are correct


obtaining energy


producing offspring

Question 6 (3 points)
What do we call the branch of science for classification of organisms?

Question 6 options:

Taxonomy


Chemistry


Physics


Biology

Question 7 (3 points)
What is an example of "maintaining structure"?

Question 7 options:

a cell dividing


eating an apple


catching a fish


healing a broken arm

Question 8 (3 points)
All successful organisms must be able to do what three things?

Question 8 options:

obtain energy, produce offspring, eat


obtain energy, eat, play video games


obtain energy, produce offspring, maintain their structure


maintain their structure, eat, build a home

Question 9 (3 points)
Which example is NOT a basic need of all organisms?

Question 9 options:

soil


appropriate enviornment


water


food

Question 10 (3 points)
What do all living things need?

Question 10 options:

energy, water, sunshine, and protection


water, parents, a place to live, and air


oxygen, an outer covering, parents, vitamins


food, water, air, and a place to live

Answers

Answer:

1: Mold 2: Cells 3: do all jobs 4: bacteria 5: producing offspring 6: Taxonomy 7: Healing a broken arm 8:obtain energy, produce offspring, maintain their structure 9: soil (I think) 10: food, water, air, and a place to live

Answer:

1. lung.

2. cells.

3. do all jobs for survival.

4. bacteria.

5. producing offspring.

6. Taxonomy.

7. a cell dividing.  

8. obtain energy, produce offspring, and maintain their structure.

9. soil.

10. food, water, air, and a place to live.

Explanation:

1.  all of the other options are organisms, while a lung is an organ.

2. All living things are made of cells

3. All unicellular organisms must be able to perform all the functions necessary for life. Meaning do all the jobs needed for survival.

4. Bacteria is the organism listed that is able to cause an infection or contagious disease.

5. A fish laying hundreds of eggs is an example of producing offspring. While it could also be an example of maintaining structure, a fish cannot obtain energy by laying eggs. So, the best answer is producing offspring.

6. Taxonomy's definition is the branch of science concerned with classification, especially of organisms; systematics.

7. a cell dividing is maintaining structure. After growth, cell division by mitosis allows for continual construction and repair of the organism. The primary concern of cell division is the maintenance of the original cell's genome. So, this is the best option for the question.

8. The second option is wrong, because not every organism plays video games. The 4th option is wrong, because not every organism builds their own home. And finally, the first option is incorrect, because plants do not physically eat they obtain their energy through photosynthesis. So, the correct option is the 3rd one.

9. Soil is not needed for all living organisms, but the other options listed are necessary.

10. the second and third option are incorrect, because not every living thing needs a parent. The first option is incorrect, because not every living thing needs sunshine and it does not list the other necessary components. So, the correct answer is the last option. And a place to live can also mean an appropriate environment.


Write each characteristic in the space below for each photograph. Some characteristics will be described more than one photograph.

Characteristics:

Grains have been eroded a great distance.

Grains have been eroded a short distance.

Differential weathering.

Sediments deposited in horizontal layers.

Likely deposited after being eroded by flowing water.

Well-sorted sediment.

Differential weathering (also I’m not sure why there’s two of them but this is another characteristic as well)

Sediments deposited in horizontal layers (again, I’m not sure why there’s two of them but this is another characteristic as well)

Answers

I do not know what the answer is.

I do just dm me I con do it there

The stem of a plant is experiencing phototropism. Which statement correctly describes the plant's response?

Answers

Answer:

A the stem moves towards the light for better photosynthesis

Explanation:

saw it happen

Answer:

The Answer is A  

Explanation:

Growth in plants reflects the way in which they interact with the environment. If we place a strong light at one side of this fuchsia plant, the plant will grow towards it. This is called a phototropic response.

Which best explains why sexual reproduction produces greater variations among offspring? *

A The DNA come from two genetically different parents.
B The DNA cells from one parent that is genetically identical.
C The sex cells are produced by mitosis.
D The sex cells undergo self fertilization

Answers

Answer:

A The DNA come from two genetically different parents.

Explanation:

Everyone has different genetics. They are determined by sex cells that are produced by MEIOSIS NOT mitosis. Meiosis allows for genetic variation amoung offspring along with the genetically different parents.

The DNA come from two genetically different parents explains the best reproduction greater variations among offspring.

What is sexual reproduction?

Reproduction is the act of one or more parents creating a new individual (offspring), frequently within the same species. It is among the characteristics of a living creature.

Sexual reproduction, we mean a process where two parents' genetic material is combined to create a child. When two haploid gametes combine, a genetically unique diploid child is produced.

The word "sexual" has a Late Latin etymology that stems from the word sexus, which means "of copulation or generation." The word reproduction is also derived from the Latin words re, which means "again," and productio, which means "creation." Alternative: syngenesis.

Therefore, The DNA come from two genetically different parents explains the best reproduction greater variations among offspring.

To learn more about sexual reproduction, refer to the link:

https://brainly.com/question/7464705

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Which prediction ,begin emphasis,best,end emphasis, describes how liquid water may change when thermal energy is added? Answer options with 4 options

A. The water particles will move more slowly and the water will become a gas.
B. The water particles will move more quickly and the water will become a gas.
C. The water particles will move more slowly and the water will become a solid.
D. The water particles will move more quickly and the water will become a solid.

Answers

B because when the heat touches the liquid it starts to evaporate and the evaporation brings it into gas
B. when heat is added particles speed up causing gas

Rhythm is how the beat is broken down into blank and blank
Noise
Silence
Sound
Rest ​

Answers

Sound and rest I think

one and two please !!

Answers

1. Plants on land have taken up approximately 25 percent of the carbon dioxide that humans have put into the atmosphere. The amount of carbon that plants take up varies greatly from year to year, but in general, the world's plants have increased the amount of carbon dioxide they absorb since 1960.

2. Animals that eat other animals get the carbon from their food too. Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years.

which of these is not a molecule
A) DNA
B) water molecules
C) single atoms
D) medicines

Answers

I think it’s D because Medicines don’t really have molecules

Answer:

d) medicines

have a nice day! <3

Matt’s eye color is different from his father’s eye color. Which statement best explains this occurrence? *

A The DNA regulating Matt’s eye color is identical to his mother’s DNA.
B Most of the DNA regulating Matt’s eye color is inherited from his father.
C Most of the DNA regulating Matt’s eye color is inherited from his mother.
D The DNA regulating Matt’s eye color is a unique combination of both of his parents’ DNA.

Answers

Answer:

I think it's A or D because he had to get his eye color from his mother since it's not the same as his father or it could be a mix of two different colors like D says, sorry lol

The Punnett square below shows a cross between 2 pink flowers. What is a percentage that a pink flower will be produced? *

Answers

Answer:

50%

Explanation:

rr, rw, rw, ww

PLZ help ILL GIVE BRAINLEIST

Answers

Answer:

it was a fort in 1669

Explanation:

hope this helps <3

The correct answer is 1669
Other Questions
This is the one i need help with help and explain PLESS HELPPP MY GRAED IDPANES ON ITTTTWhy do you think the memoir is called Night? Why does he keep saying: Night was falling? Night fell? Night had fallen. "My life had become one giant night", etc. Write about the difference between day and night, light and darkness, good and evil, spring and winter . Name four groups that appealed to Wilson for independence when 45mL of 0.25mol/L sulfuric acid is mixed w/ 25mL of 0.58mol/L Calcium hydroxide, the solution has a? Read this passage about Christopher Reeve.Christopher Reeve was born on September 25, 1952, in New York City. His mother was a journalist, and his father was a professor. As a kid he played sports, did well in school, and liked acting. His passion for acting goes back to playing with his brother when they were little. Reeve acted in his first play at the age of nine. After attending college, taking acting classes, and acting in many plays and movies, Reeve landed his biggest role. In 1978, he played the title role in Superman. He received very positive reviews for his performance and starred as Superman in all the sequels. Reeve was soon acting as the lead role in dozens of movies after Superman. Once well-known, Reeve used his celebrity status for good causes, such as visiting very sick children through the Make-A-Wish foundation. He was also a track and field coach at the Special Olympics.Besides acting, Reeve was also a licensed pilot and liked horseback riding. He learned to ride horses for a movie role, and he continued riding in his free time. Unfortunately, while riding one day in 1995, Reeve fell from his horse and became paralyzed from the neck down. Being confined to a wheelchair did not hold back Reeve from being socially active, and after many surgeries and rehabilitation, he decided to dedicate his life to helping people with spinal-cord injuries. He created the Christopher Reeve Foundation, which supports the improvement of the lives of people with disabilities and helps fund research to find a cure for paralysis. He was also politically active, working with senators to make sure that people with disabilities were treated fairly in the workplace. Reeve received many awards for his dedication to public service. He also wrote two books about his experiences, and a documentary was made about his life. Reeve passed away in 2004, but his legacy lives on today. He touched the lives of many people and showed us what it means to overcome extreme odds by never giving up.Which fact would be most appropriate to include in a yearbook page about Reeve?Reeve created a foundation to help people with disabilities.Reeve spent time working with senators.Reeve learned to ride horses for a role in a movie.Reeve enjoyed playing with his brother when they were little. What do many people find surprising about Antarcticas Lake Vostok? A. It is a very unusual color. B. It is the highest lake in the world. C. It is home to two rare types of penguins. D. It remains liquid despite freezing temperatures. If a cell suddenly stopped producing transfer RNA, which of the following processes would be immediately affected? The function g(x) is a transformation of the cube root parent function, f(x) = 3/x . What function is g(x) helpMe Fun Stuff Manufacturing produces frisbees using a three-step sequential process that includes molding, coloring and finishing. When the frisbees and associated costs are transferred from the molding process to the coloring process, which account is debited please awnser the question in the photo 8/11 x (5/9 - 1/6) 1 5/9 HELP GIVING BRAINLIEST NUMBER 5!!!!!! What are the interest cost and the total amount due on a six-month loan of $1,800 at 14.4 percent simple annual interest HELPArt History is defined as:A-the study of artB-the discussion of artC-the evaluation of artD-the opinion of art can someone help please. What were the most consequential outcomes of the ideology of Manifest Destiny? can someone help me. !! NOT A QUESTION !!A theme of "Gumption" is that equal rights are often unequally distributed.- How does old man Oysters visit to the government relief office to fight for employment for his son contribute to this theme?- He receives a promise of employment for his son but later learns that the job has been given to someone less qualified.- His complaints are received with indifference and scorn, although both men are offered jobs as laborers.- His protests are met with accusations and arrest, despite the fact that he is a citizen and his son is well qualified.- He learns that in times of economic distress, employment opportunities become scarce for every citizen. what is the ordered pair to y=7x-2 Which is the correct order for impeachment proceedings?The Senate brings charges of misconduct; the official is removed.The House brings charges of misconduct; the Senate holds an impeachment trial; the official isremoved if found guilty.The Senate brings charges of misconduct; the House holds an impeachment trial; the official isremoved if found guilty.The House brings charges of misconduct; the official is removed.