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

According to the table "Balance of the Carbon and Nitrogen" on page 6, which substance has the highest carbon to nitrogen ratio?




Pick the answer choices down below!!!

Answers

Answer: Vegetable waste

Explanation:

Vegetable waste is the answer

science about body :P plz no troll

Answers

a digestive system is a digestive system that does things that digestive systems do
The digestive system breaks down all food and Carry’s it through your body to the area where you réalise it.

The organs in the digestive system are mouth, esophagus, stomach, gallbladder, small and large intestine, liver, pancreas, and anus.

The digest system interacts with any food you put in your body.

The muscle system is a organ that that’s helps you move around.

The organs in the muscle system are the skeleton, smooth and cardiac muscles.

The muscular system works to help support and move the body, it also protects all the organs inside.

Please help me this is the last question and I need to get it right please help me.
If John and Sam both push on a boulder with a force of 30N, but in opposite directions, what will happen to the boulder?

Question 4 options:

The boulder moves towards Sam

The boulder moves away from John and Sam

The boulder moves towards John

The boulder will not move.

Answers

The boulder will not move.

The boulder will not move, because the net effect of the force is reduced if two people apply the same force to the object, hence option D is correct.

What is the effect of the force?

Force is defined as applying strength or energy to applying on the object cause it creates motion. It is not in any object force is applied to the object by another person.

If John and Sam both push on a boulder with a force of 30N, having no effect on the boulder because they are applying the same force boulder but in opposite directions.

If any force is applied to the object but in the opposite direction, the net force is the difference between them, so it reduces the net force.

Therefore,  the boulder will not move, due to the net force being reduced if the same force is applied to the object in the opposite direction.

Learn more about force, here:

https://brainly.com/question/15776275

#SPJ6

Which are characteristics of flukes? Check all that apply. They are free living. They are a type of flatworm. They reproduce sexually. They have eyespots. They are segmented.​

Answers

they are a flat worm
they reproduce sexually
they have eyespots

Answer:

cad

Explanation:

HELP, PLEASE!! ON THIS I ALREADY DID MOST OF IT! IT IS TOO SMALL TO READ!!

Answers

Answer: TT,TT,Tt,Tt      tt,tt,tt,tt

i think

Explanation:

TT, TT, Tt, Tt


tt, tt, tt, tt

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

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

What two human systems deal with allergies?

Answers

One is immune system. ‍‍‍‍

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.

Who controls selective breeding?
a
It occurs naturally.
b
Entire populationsIt is controlled by humans.

Answers

I’m saying A but maybe not

Sometimes a cell is compared to a city. How would the energy needs of a cell be compared to the energy needs of a city?

Answers

A city needs power plants to support just about everything in it, just as a cell needs the mitochondria to support the cell in doing it's job.
Perhaps it could be a with a side of b c and d

Using the dichotomous key, Which kingdom classification of the organism is described above?

A.
Fungi

B.
Eubacteria

C.
Protista

D.
Animalia

Answers

Answer:

Fungi

Explanation:

It’s fungi I did this unit last year

Fill in the blank.
Now from the top make it drop dass sum ____ now getta _____ ina mop

-Cardi & Megan

Answers

Answer:

wet a cat, bucket

Explanation:

the fact that these keep popping up

wet a/s/s pus/s/y

Bucket

The phase in which a cell spends most of its life is interphase. True or False

Answers

True................

an air mass exists off the Pacific coast of California what type of air mass is this and what are its main characteristics choose all that apply

Answers

What are the options???

If you had to define ecological succession in your own words in a 140 character text, how would you define it?

Answers

Answer: Succession is like winning a race. You get to acomplish something that you wanted to do.  sorry this is short

Explanation:

Ecological succession is when the structure of a biological community evolves overtime. For example, when a tree falls in a forest, the sunlight may be able to reach the forest floor, which would allow new growth to begin.

What would happen to the oxygen cycle if the carbon cycle didn't exist?

Answers

Without carbon dioxide, the plants would not do as well, and potentially die, creating a problem for all the animals on the planet, Since they have to breathe oxygen to live. Oxygen is given off as a waste product by the plants while they are conducting photosynthesis.
Without carbon, oxygen would not exist

Fill in the blank.

_____ _____ curvy wavy ___ ___ lil waist!

-Megan Thee Stallion

Answers

Body crazy big titties

Answer:

body crazy big titties

Explanation:

i know the songwho doesn't

please help me with this!! I will mark brainliest!

Answers

Well, the seedless plants reproduce and when they do produce, they provide good for the consumers in the environment and omnivores . Also when reducing, the release carbon dioxide, and when the animals die the body’s leave nutrients , which means that it will dig into the soil and will be used by other organisms.


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

an air mass exist in the middle upper part of the United States what type of air mass is this and what are its main characteristics choose all that apply

Answers

Answer:

Air masses are characterized by their temperature and humidity properties. The properties of air masses are determined by the the underlying surface properties where they originate. ... Upon movement, air masses displace residual air over locations thus changing temperature and humidity characteristics.

Explanation:

Mass exists because we are living in a world full of a lot of weird things and we love it

The predictions of an assumed hypothesis are the result of _______ reasoning.
A. inductive
B. deductive
C. logical

Answers

The answer is logical reasoning

please I need help
Based on
-climate
-global warming
-temperatures

Answers

Answer for #8:

Cold water is heavier than warm water, and because of that it sinks. Ice dissolving into the water cools the ocean, causing it to drown. This creates a wave by which cold water is drowning near the poles, which forces the water into the depths of the ocean, leading the entire ocean to swirl. This cold, thick water is then forced back up against the west shores of the continents where it can be warmed.

Hope this helped,

0Drink0Milk0

Answer given

............

Explain the relationship between genetic change and adaptation.

Answers

Answer:

Mutations can cause instant adaptations, while natural selection is the process by which adaptations occurs over a series of generations. Adaptations are changes or processes of changes by which an organism or species becomes better suited for its environment. A mutation is an alteration of the DNA sequence.

Explanation:

Just don'y copy a paste, try to paraphrase a bit, don't want to get in trouble!!!

Answer:

Natural selection is the process by which adaptations occurs over a series of generations, while mutations can cause instant adaptations. A mutation is an alteration of the DNA sequence. Adaptations are changes or processes of changes by which an organism or species becomes better suited for its environment.

Explanation:

does this help?

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

According to the American Council of Exercise, overweight people have, on average, greater than 30% body fat. In graph B, what do you notice about the amounts of hydrogen and methane in subjects with healthy body fat percentage compared to subjects who were overweight?

Answers

Answer:

Subjects in the “normal” group had a normal amount of hydrogen, 20 ppm  or less, and a normal amount of methane, 3 ppm or less.   If subjects had greater amounts than the normal amount of hydrogen (≥20 ppm) detected but had less than the normal amount of methane (≤3 ppm), they were considered hydrogen positive (represented by the “Hydrogen Only” bar), while ≥3 ppm of methane detected but ≤20 ppm of hydrogen was considered methane positive (represented by the “Methane Only” bar).  If subjects had greater than the normal amounts of both gases (≥20 ppm of hydrogen and ≥3 ppm), they were considered hydrogen and methane positive (represented by the “Methane and Hydrogen” bar).

i hope this helps

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

PLZ help ILL GIVE BRAINLEIST

Answers

Answer:

it was a fort in 1669

Explanation:

hope this helps <3

The correct answer is 1669

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.

brainliest! question is in pic

Answers

Answer:

I know the muffin man and the muffin man knows me lol

I unfortunately do not know the muffin man and he does not know me
Other Questions
help mee choose the correct one and explain please Which of the following is a point-slope equation for a line with the point(-2, 4) and a slope of 3?OA. y- 4 - 3(x+2)OB. y+2 = 3(x- 4)OC. y-2 - 3(x- 4)OD. y- 4 - 3(x- 2) Change the AR verbs from the PRESENT to the PRETERIT tense1. BailamosA. BailaronB.BailasteisC.BailemosD.Bailamos2. Caminan A. Caminaron B. Caminaste C. CaminD. Canin3. JuegoA. JugB. JuguC. JueguD. Jueg Im giving Brainlest to who answers the best i need help with this please someone help me , appreciate it dearly!! What patterns do you see in the similarities and differences between Hox genes inhumans and in fruit flies? Please help, thank u ! Please I need helpWhat is the perimeter of the parallelogram how did the enlightenment changed drama? Simplify: 2(5) + 2 = NEED HELP WILL MARK BRAINLIEST 25 POINTS FOR ANSWER Which option is typically only used when utilizing self joins?display namealiasrelationshipprimary key The function g(x) is a transformation of the cube root parent function, f(x) = 3/x . What function is g(x) helpMe HELP!!!Will Give Brainliest to correct answer!!! 40 POINTS!!! help me with the question in the image please help me out :) 2(x-6)+3x+4=Helpppppp. What is the image point of (4,-7)(4,7) after a translation right 4 units and up 5 units? (15 POINTS!!!) Solve 4 two-step equations:1. 2x + 12 = 42. -5c + 9 = -163. -12 = -7 + x/4 ( Now that you have worked through a lot of material that includes these basic patterns, and you have compared grammatically correct and incorrect sentences, write down what you think is a rule that could explain what makes a sentence grammatically correct or not. For example, you might write something like: "verbs always match nouns in number, and they usually come before the noun." In other words, make your best guess for the grammar rule that makes sense out of the pattern(s) you see in the phrases you have been working with. Review if you need to, and you might briefly check your hunches against the sentences you have been working with in this or previous modules. Keep in mind that what you're after is your hunch, not a grammar rule from a text book. Now check your hunch with the explanation of this principle in the following pattern. Work out the size of angle x. It took Sebastian 10 years to repay a loan of $30,000, paying $296.66 per month. Jana paid off a loan for the same amount at the same interest rate in 5 years by paying $545.75 per month. How much more did Sebastian pay in interest than Jana?