Why are Sea Otters considered a keystone species?

Answers

Answer 1

Answer:

Sea otters are considered a "keystone species" because they can exert top-down pressure via predation on sea urchins, which are grazers upon kelp.

Explanation:

As urchin density decreases from sea otter predation, so does the grazing pressure on kelp and as a result kelp forests flourish in the presence of sea otters.

Answer 2

Sea otters are a "keystone species" which means that they can exert top-down pressure via predation on sea urchins, which are grazers upon kelp. As urchin density decreases from sea otter predation, so does the grazing pressure on kelp and as a result kelp forests flourish in the presence of sea otters.

Related Questions

Can I pass 6th grade with these grades:
ELA: 50.8%
History: 25.6%
Math: 60%
Science: 91.3%

Answers

Answer:

You can't

Explanation:

I'm sorry but with a 25% and a 50% it's not enough. Hope this helps you out and your teachers are nice enough to work with you.

A student wants to design an investigation to determine if an object has potential energy. What are some questions the student could ask to determine if the object contains potential energy? (Select 2)

Does the object have kinetic energy?

Does the object move when it is released from a rest position?

Does work have to be done to hold the object in place?

Does a force act on an object?

Is the object part of a system?

(i had another attempt, and 2 and 5 were innocent)

Answers

Response... Option 1 & 4

Question 1 and he could ask the position of the object because potential energy is an energy due to the object’s position

give an example of one living and one non-living thing that uses the force of buoyancy to function. explain how they work.

Answers

Answer:

the biotic one is a human in water and they flaot because of the air in our lungs and the abiotic one is a swimming buoys are filled with foam and foam floats

Explanation:

...

Some examples are a boat sailing on the river, Iceberg floating on water, A person with a life vest floating on water, Ship floating on the ocean, Helium balloon rising in the air. The buoyant force is proportional to the density.

A rubber ball rolls across a flat floor. After 1 second, it has rolled 2 meters, and after 2 seconds, it has rolled an additional 1.6 meters. From this data, it is clear that the rolling ball has decreased in

Answers

Answer:

It has decreased in speed.

Explanation:

The second time it rolled, it had more time and did not go as far. Meaning it gained friction and decreased in speed.

the speed decreases

light traveling through air encounters a second medium which slows the light to 100,000 miles/second. What is the index of the second medium?

Answers

Answer:

300000 hope it is help full

Explanation:

300000

Answer 3000

Explanation:
The formula is n= c/v, “n” means index, “c” means speed of light in vacuum and “v” means speed of light in the material

Middle school science: Do folded mountains form when 2 continental plates push against each other? (you can just answer yes or no)

Answers

Answer:

Yes

Explanation:

When tectonic plates push against each other, folded mountains can form

Yes. When two continental plates push up against each other, it’s forms mountains from the land being pushed together.

Science
(Electromagnetic waves)
Describe what happens when each type of the 7 waves encounters our planet?

Answers

when a light wave encounters an object, they are either transmitted,reflected,absorbed,refracted,diffracted, or scattered depending on the wave

Light waves across the electromagnetic spectrum behave in similar ways. When a light wave encounters an object, they are either transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered depending on the composition of the object and the wavelength of the light.

Which of the following correctly relates the porosity, permeability and production of a well in an aquifer?

Decreasing porosity and increasing permeability lead to increased production in an aquifer.
Decreasing porosity and decreasing permeability lead to increased production in an aquifer.
Increasing porosity and increasing permeability lead to increased production in an aquifer.
Increasing porosity and decreasing permeability lead to increased production in an aquifer.

100 points

Answers

Answer:

Increasing porosity and increasing permeability lead to increased production in an aquifer.

Explanation:

An aquifer is a body of rock / sediment that holds groundwater.

Porosity affects the amount of water a particular rock type can hold and depends on a couple of different factors such as how water circulates within the soil or ground.

The ability of the ground water to pass through the pore spaces in the rock is described as the rock's permeability.

Therefore, Increasing porosity and permeability will lead to increased production in an aquifer.

Answer:
Increasing porosity and increasing permeability lead to increased production in an aquifer.

explain why the rocket can move at constant speed in outer space.

Answers

Answer:

When the rocket's engines are fired up, the force of gravity is disturbed, and the rocket takes off in the air. Later, as the rocket's fuel runs out, it slows down, comes to a halt, and eventually plummets to Earth's surface. Forces can affect objects in space as well. Spaceships are constantly in motion while traversing the solar system.

Explanation:

Please read!

Answer:

Explanation:

The rocket works because of the law of conservation of linear momentum. The law of conservation of linear momentum is very important in physics. Momentum is defined as the mass of an object times its velocity.

The image shows the cone forecast map of a hurricane.
Four locations (I, II, III, IV) are labeled on the diagram. At which of the four locations is the hurricane predicted to be LEAST intense?

A.) I

B.) II

C.)IV

D.) III

Answers

the answer would be d because because

Maybe a im not sure tho

Explain how water is controlled to generate electrical energy in hydro-electric dams. and show a diagram is help explain the answer.

Answers

Here is how I would I explain it. Water is channeled through tunnels in the dam. The energy of water flowing through the dam’s tunnels cause turbines to turn. The turbines make generators move. Generators are machines that produce electricity. Engineers control the amount of water let through the dam. The process used to control this flow of water is called the intake system.

Hope this helps can’t do the diagram part.

Near the bottom of the dam wall there is the water intake. Gravity causes it to fall through the penstock inside the dam. At the end of the penstock there is a turbine propellor, which is turned by the moving water. The shaft from the turbine goes up into the generator, which produces the power.Jun 6, 2018

This student is listening to MP3 files. What two needs or wants does this wave technology meet?

A. To share music and podcasts easily

B. To hide or erase messages quickly

C. To send and receive messages quickly

D. To store music and podcasts easily

Answers

Answer:

A.To share music and podcast easily

Explanation:

HAVE A GREAT DAT

It’s a. I’m going back up tomorrow ooo

True or False
If two unbalanced forces act on an object in opposite directions, the object will move in the direction that the stronger force is acting.

Answers

Answer:

true

Explanation:

If two unbalanced forces act on an object in opposite directions, the object will move in the direction that the stronger force is acting. If two forces act in the same direction on an object, the forces add together and the object experiences a greater force in that direction

True
An object in the opposite direction will act on the strongest force

are exorcisms real and if so does that mean demons are real ???

Answers

Yes They are both real

i would believe so, yes. I mean something would have to posses someone for an exorcism right? And I highly doubt that an angel would do such terrible things to someone. So it would have to be a demon. But if demons or angels aren’t real then the people who got possessed would have to be really really good actors.

Just my thoughts ‍♀️

Imagine that a plant switches its habitat. Draw the new plant and label the new adaptive features that the plant should have in the new habitat to survive. Upload the image of the new plant drawn . Give your plant a suitable name

Answers

...growing lower and closer to the ground to shield themselves from wind and cold.

growing lower and closer to the ground to shield themselves from wind and cold.

The image shows a ship using sonar to locate a school of fish. Which data are used to determine the distance of the ship from the fish?

A. The amount of time it takes the sound waves to travel to the fish and back to the boat

B. The number of sound waves the ship emits

C. The amount of time it takes the sound waves to travel from the boat to the fish

D. The number of sound waves that bounce off the fish

Answers

Answer:

Explanation:

The distance of the object that reflected the sound wave can be calculated by knowing the speed of sound in water and the time interval between transmission and reception of ultrasound.20 Mar 2017

The answer is A. The amount of time it takes the sound waves to travel to the fish and back to the boat

Other Questions

A fruit stand has to decide what to charge for their produce. They need \$10$10dollar sign, 10 for 4 apples and 4 oranges. They also need $12 for 6 apples and 6 oranges. We put this information into a system of linear equations.Can we find a unique price for an apple and an orange? Which question can be answered by finding a volume? How much wrapping paper is needed to wrap that gift? What is the minimum amount of paint needed to cover a jewelry box? If Brad drank all the juice in a juice box, how much juice did he drink? How many square tiles are needed to cover the picture frame? The table shown below lists the time, in days, that it takes fora package to be delivered based on its mode of transport andwhether it is international or domestic. Some additionalinformation is provided.1. The cost per package by air is $100; by train, $50; bytruck, $10; and by boat, $20.2. Fragile packages cannot be transported by air.3. Shipping fragile packages costs an extra $20.4. Shipping international packages costs an extra $30.Tim needs to transport a fragile package, and he needs it toarrive as soon as possible. He is shipping domestic. Which ofthe following shipping methods should he use? A circular swimming pool has a radius of 28 ft. There is a path all the way around the pool that is 4 ft wide. A fence is going to be built around the outside edge of the pool path.A circle has a radius of 28 feet. A larger circle goes around the smaller circle that is 4 feet wide.About how many feet of fencing are needed to go around the pool path? Use 3.14 for Pi.88 ft100 ft176 ft201 ft Let (-3, 5) be a point on the terminal side of 0.Find the exact values of cos0, csc 0, and tan 0. When you donate blood, you give around one pint. How much blood do you have in your body to start with?. please helppppp i really need this. Consider a circle whose equation is x2 + y2 2x 8 = 0. Which statements are true? Select three options. The radius of the circle is 3 units. The center of the circle lies on the x-axis. The center of the circle lies on the y-axis. The standard form of the equation is (x 1) + y = 3. The radius of this circle is the same as the radius of the circle whose equation is x + y = 9. Read the following transcript of the end of Orson Welles's radio broadcast of the War of the Worlds, in which a narrator remembers a time when aliens invaded Earth. During the radio broadcast, many audience members became convinced that the story of an alien invasion was truly happening.We annihilated the world before your very ears tonight, and utterly destroyed the C.B.S. You will be relieved, I hope, to learn that we didn't mean it, and that both institutions are still open for business. So goodbye everybody, and remember the terrible lesson you learned tonight. That grinning, glowing, globular invader of your living room is an inhabitant of the pumpkin patch, and if your doorbell rings and nobody's there, that was no Martian . . . it's Hallowe'en.Based on the transcript, what did broadcasting the story through the medium of radio allow Welles to do?A. Apologize for working in radio because it influences people too muchB. Encourage the audience to read the original storyC. Comment on the way that people trusted the media too muchD. Announce the closing of the radio station 12e < -96 Solving one step inequalities (Please help! I need an actual answer not if its true or false / unidentified) A jewelry store has 88 rings to display they arrange the rings in a even rose how many rings are in each row A luxury-home designer has built a dishwasher that is connected to a cabinet and uses mechanical arms to pick up clean dishes and move them into the cabinet. Many consumers love the product, but they say they it is too expensive. Nevertheless, the company has tested the product in many situations and found that it never breaks a dish. What issue does the designer most likely need to improve in order for the dishwasher to be a good product to sell Landscape with Saint John on Patmos. Saint John sits in ancient ruins while overlooking a countryside.Who is the artist of the image above?a.Christopher Wrenb.Georges de la Tourc.Nicolas Poussind.Antoine Le Nain Use the excerpt to answer the question.In the wake of the 2001 recession, the tech sectors impact on employment occurred primarily A. in Silicon Valley. B. in Southern California. C. around Washington, D.C. D. away from Silicon Valley. What is 1 2/3 multiple 2/3 Which of these was a neoclassical painter associated with the leaders of the american revolution? a. john singleton copley b. georges seurat c. jacques-louis david d. william blake Classifying an igneous rock as a breccia is based on its ______, whereas the classification of scoria and pumice is more closely related to their ______. What is the total number of different 9-letter arrangements that canbe formed using the letters in the word Projector? For the first 6% of Bianca's salary, her employer matches 100% of her 401(k)contributions, and from 6% to 12%, Bianca's employer matches 50% of her401(k) contributions. Bianca's salary is $50,000, and last year, she contributed$6000 to her 401(k) plan. What was her employer's contribution to the401(k)?OA. $7200OB. $4500OC. $6000OD. $3000 4. Why does Jim Waldman oppose drilling for oil in the Arctic National Wildlife Refuge? 5. Outline two reasons why oil exploitation is prohibited in the ANWR. 6. How would you describe the topography of the ANWR? 7. What does ANWR stand for? 8. Why do you think Jim Waldman describes the refuge as one of "the most spectacular wildlife areas in North America?" 9. It is mentioned that "since 1978, about 12.9 billion barrels of crude have been taken out of the nearby Prudhoe Bay fields." How significant is this statement? 10. Overall, if you are a leader to make the final decision on oil drilling in the ANWR fields, what would be your stance? Hint: would you be for the drilling of oil or against? Why or why not.