Sea urchins are spiny, globular animals that live on the ocean floor. How are sea urchins classified?
A. vertebrates

B. invertebrates

C. mammals

D. arthropods

Answers

Answer 1

Answer:

B

Explanation:

because they belong to classe Echinoidea, phylum echonodermata

Answer 2

Answer:

B

Explanation:

They have no bones, and therefore, they are classified as a invertebrate(s).


Related Questions

Name one financially destructive fungi

Answers

Answer:

Puccinia graminis

Explanation:

I think that this is one

Aspergillus and Fusarium

Using your new vocabulary words, explain the difference between mass and weight and how these concepts relate to gravity.

Answers

Answer:

The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass.

Answer:

credit to the other person The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass.

Explanation:

The weather is getting much warmer after a cold winter. What is a common physical response with certain mammals?
A. Mammals will grow bigger in the heat.
B. Mammals will shed much of their fur or hair to help them cool off and maintain their body temperature.
C. Mammals will move closer to water and beaches to stay cool.
D. Mammals will depend on other animals or humans to help keep them cool.

Answers

Answer:

B

Explanation:

The answer is B


Explanation

Which of the following examples is a non-renewable source of energy?
wood
natural gas
hydroelectric
wind

Answers

Natural gas ………..






…..,
Natural gas would be the right answer since it is non renewable

By what process is sunlight converted into stored energy and finally changed into fossil fuels?
phototropism
photocatalysis
photolysis
photosynthesis

Answers

The answer is photosynthesis
Photosynthesis :hope this one helps

If we know myofibrils are made of protein strands, what would expect to find a large number of in the myofibrils themselves.

Answers

Answer:

the Z lines and thick filaments of the myofibrils within the muscle fibers are aligned.

Explanation:

Myofibrils are made up of units that repeat along their length, called sarcomeres.

What is Myofibril what are its myofilaments?

Every muscle cell contains contractile protein filaments of two types: actin and myosin. These myofilaments (or myofibrils) are distinguished from one another by molecular weight, which is higher in the myosin filament.

With this information, we can conclude that myofibrils are made up of units that repeat along their length, called sarcomeres.

Learn more about  myofibrils in brainly.com/question/5811746

how would society be different without the development of biodiversity?

Answers

Answer: Without biodiversity there would not be different so many different unique organisms which play a major role in food chains, and how organisms interact.

Explanation:

Without biodiversity organisms will all be the same. There would be no differences between them.

How many carnivores are there compared to herbivores?

Answers

Answer:  63%

Of all the present-day animals Wiens and colleagues surveyed, 63% were carnivores, 32% were herbivores, and 3% were omnivores. (The rest were ambiguous.) The smaller proportion of herbivores and omnivores may seem surprising, Wiens says, because plants are such a plentiful resource.

63% are carnivores compared to herbivores

Is the damage dams cause more important than the benefits they bring?

Answers

Answer:

While dams can benefit society, they also cause considerable harm to rivers. Dams have depleted fisheries, degraded river ecosystems, and altered recreational opportunities on nearly all of our nation's rivers.

Explanation:

Dams can benefit society, they also cause considerable harm to rivers

Where does photosynthesis take place?
in the stem of a plant
in the roots of a plant
in the chloroplasts of a leaf
in the stomata of a leaf

Answers

Answer:

In the chloroplasts of a leaf

Explanation:

In the leaves. The chloroplast

In angiosperm, what is the female structure of the plant called?
pistil
spore
stamen
pedicel


P l s H e l p M e T h a n k Y o u

Answers

Answer: It's Pistil

The correct answer is pistil

Identify at least one technology that uses digital encoding or transmission and explain how it does that. (examples could be some scientific equipment or medical equipment/devices)

Answers

ISDN uses digital transmission encoding scheme known as 2 binary 1 quaternary or 2B1Q. The 2B1Q means that there are four possible signal levels and that each signal level encodes two bits of information.
Hope this helped :)
digital telephone
it converts the voice analog signal to a digital form, allowing the device to directly connect to a digital transmission channel.

name one financially destructive fungi

Answers

Magnaporthe oryzae or Botrytis cinerea
Aspergillus and Fusarium

What type of energy is used by your body when you eat food?
thermal energy
gravitational energy
electrical energy
chemical energy

Answers

Chemical energy



…….
Chemical energy is the answer

make 2 full sentences that use "Hoomoozygous" and another 2 full sentences for "heterozygous" (i couldnt use the proper spelling for hoomoo because its considered in a hoomoophobic slur thing even though its also a scientific term"

Thank you! and I hope you have a great day :)

Answers

Answer:

To be Hoomoozygous means you've inherited two of the same genes.  If you've inherited freckles then you have Hoomoozygous genes.

To be Heterozygous is to have two different genes. If you have a recessive gene and a dominant gene then you have Heterozygous genes, because they are both different.

Explanation:

You are in lots of luck cause I learned this today

The answer is correct but is not hoomoozygous is homozygous

What is an indicator of healthy soil?

more organic material than inorganic material

more inorganic material than organic material

a balance of organic and inorganic materials

Answers

a balance of organic and inorganic materials

Answer C a balance of organic and inorganic materials.

Explanation: hope it helps

have a good day :)

Heres the text
In the spring of each year, the second largest dead zone in the United States forms in the Gulf of Mexico. During the spring, farmers fertilize their land as they prepare for crop season. As a result, nutrients from the fertilizers, such as nitrogen and phosphorus, drain into the Mississippi River and eventually the Gulf of Mexico. According to the National Oceanic and Atmospheric Administration, “Excess nutrients that run off land or are piped as wastewater into rivers and coasts can stimulate an overgrowth of algae, which then sinks and decomposes in the water” (NOAA, 2018). The decomposition process consumes and depletes oxygen levels in the Gulf of Mexico, which causes hypoxic areas or dead zones.



A group of scientists measured several water quality parameters to better understand how dead zones in the Gulf of Mexico impact brown shrimp populations over time. The scientists are most interested in the dissolved oxygen levels because the levels are critical for the survival of brown shrimp populations. Brown shrimp populations thrive when dissolved oxygen levels in the Gulf of Mexico are greater than 2 mg/L. However, the populations cannot thrive when dissolved oxygen levels are at or below 2/mg/L.

This is due today, pls give answer

Answers

The answer is the first one I went over it with my teacher I had it too it’s the first option

Solve for brainliest + thank + 5 star
Which statement correctly describes the interaction between the organisms shown in the food chain?

kelp ---> sea urchins ---> sea otters
A.
Sea otters and sea urchins have a predator–prey relationship.

B.
Kelp and sea otters have a predator–prey relationship.

C.
Sea otters and sea urchins have a competitive relationship.

D.
Kelp and sea urchins have a competitive relationship.
======================================================================
Which of the following explains one of the ways plants and animals depend on each other?
A.
Animals release carbon dioxide when they breathe, which plants take in to help make food.

B.
Animals release water vapor when they breathe, which plants take in through their leaves.

C.
Animals make minerals, which plants take in through their roots and pass up to their stems.

D.
Animals make their own food, which plants take in through their roots and pass to their leaves.

======================================================================
Which statement describes the BEST example of animals avoiding competition?
A.
A family of deer leave a crowded area of forest.

B.
Cheetahs and lions feed on the same prey.

C.
A bee pollinates a flower.

D.
A bird finds a spot in a tree to put a nest.
=======================================================================
The food chain represents a what-eats-what relationship that transfers energy from one organism to another.

Sun → flower → rabbit → [ ? ] → owl

What type of animal is most likely to be missing from the food chain?
A.
herbivore

B.
decomposer

C.
carnivore

D.
producer

Answers

Answer:

answer to the first question is A, to the second question is also A, the answer to #3 is D, & #4 is D carnivore

Answer/Explanation:

kelp ---> sea urchins ---> sea otters

A.Sea otters and sea urchins have a predator–prey relationship.

B.Kelp and sea otters have a predator–prey relationship.

C.Sea otters and sea urchins have a competitive relationship.

D.Kelp and sea urchins have a competitive relationship.

Answer: A.Sea otters and sea urchins have a predator–prey relationship.

-------------------------------------------------------------------------------------------------------------

Which of the following explains one of the ways plants and animals depend on each other?

A.Animals release carbon dioxide when they breathe, which plants take in to help make food.

B.Animals release water vapor when they breathe, which plants take in through their leaves.

C.Animals make minerals, which plants take in through their roots and pass up to their stems.

D.Animals make their own food, which plants take in through their roots and pass to their leaves.

Answer:

A.Animals release carbon dioxide when they breathe, which plants take in to help make food.

-------------------------------------------------------------------------------------------------------------

Which statement describes the BEST example of animals avoiding competition?

A.A family of deer leave a crowded area of forest.

B.Cheetahs and lions feed on the same prey.

C.A bee pollinates a flower.

D.A bird finds a spot in a tree to put a nest.

Answer: A.A family of deer leave a crowded area of forest.

-------------------------------------------------------------------------------------------------------------

The food chain represents a what-eats-what relationship that transfers energy from one organism to another.

Sun  → flower → rabbit → [ ? ] → owl

What type of animal is most likely to be missing from the food chain?

A.herbivore

B. decomposer

C. carnivore

D. producer

Answer: Carnivore

-------------------------------------------------------------------------------------------------------------

~lenvy~

Which are examples of how animals are used to disperse seeds? (Select all that apply.)
seeds being passed through an animal’s digestive system
seeds being carried on people's clothes
seeds being carried in animal fur
seeds being inhaled when an animal breathes

Answers

Answer:  All of those apply except for the seeds being inhaled when an animal breathes.

Hi :)

The answer is below.

Seeds passed through and animals digestive systemSeeds being carried in animal furSeeds being inhaled when an animal breathes

-How does the fur of animals give seeds?

When animals eat the seeds,other seeds have hooks on the fur or skin of animals.The seeds fall off when they walk around.

-How do they get seeds from the digestive system?

When animals use the bathroom all  over the place, the seeds are on their waste, the seeds go every where when the use the bathroom.

-How do animals inhale these seeds?

When animals breathe, they inhale the  seeds on the ground. Seeds that have fallen from trees, plants, ect. (It tells you this right in the answer choice)

-Why isnt seeds being carried on people's clothes correct?

Seeds have hooks, yes, but it doesnt mean they will stick to humans. Humans are not normally in the wild with seeds and animals. So this is not very likely to happen.

Hope this helps!

This has been,

~NatLikesAnime~

#LearningWithBrainly

The woolly mammoth lived a long time ago when the climate of Earth was very cold. They had a thick layer of fat to keep them warm, long tusks for digging in the snow, and hair that covered their bodies. The woolly mammoth ate grasses and plants. As Earth's climate became warmer, humans began to move into areas where the woolly mammoth lived. They became extinct thousands of years ago.

Which does NOT describe a reason that the woolly mammoth became extinct?
A.
Humans removed all of the predators from the area.

B.
Humans began to hunt the woolly mammoth.

C.
The food supply changed with the climate.

D.
The woolly mammoth could not adapt to a warmer climate.

Answers

Answer:

A.Humans removed all of the predators from the area.

Explanation:

A.Humans removed all of the predators from the area.

False. Humans never removed predators

B.Humans began to hunt the woolly mammoth.

True. They hunt mammoth for food/shelter/etc.

C.The food supply changed with the climate.

True. Food changed with the climate.

D.The woolly mammoth could not adapt to a warmer climate.

True.  They had a thick layer of fat to keep them warm, long tusks for digging in the snow, and hair that covered their bodies.  Hence, mammoth couldn't adapt warmer climate.

Question asking for false.

Thus, Answer = [A]

~lenvy~

A. Humans removed all of the predators from the area.

Why is humus an effective fertilizer? (Select all that apply.)
It is abundant in inorganic nutrients.
It is dense and does not contain organic matter.
It is rich in organic matter.
It doesn’t need microorganisms to decompose matter.

Answers

I think it is abundant In inorganic nutrients
Hii :)

The answer is: They are rich in organic matter.

Why are they rich in organic matter?

This is  because humus is made out of dead plants, fruits, and sometimes even animal waste. Which is all good for growing plants.

This is the only answer because the rest are wrong.

This is a 1-1 answer, meaning this is the only one that is correct.

Hope this helps~!!

~NatLikesAnime~

(Brainliest would help~)

#LearningWithBrainly

Using scientific language explain first why the earth goes through seasons (winter, spring, summer, fall) and then explain specifically why Canada can get so cold while other parts of the world stay warm?
please help, will give brainliest!

Answers

Answer:

It is all about the tilt of the Earth’s axis. Many people believe that the temperature changes because the Earth is closer to the sun in summer and farther from the sun in winter. In fact, the Earth is farthest from the sun in July and is closest to the sun in January!

Explanation:

Answer:

because it’s rotation around sun

Because of its location north of the Equator

Explanation:

Please Help me (I'll give brainlest) (LIMITED)

Answers

Answer:

I think its A

Explanation:

Answer:

ii B Most

Explanation:

Non-native Burmese pythons have established a breeding population in South Florida and are one of the most concerning invasive species in Everglades National Park. Pythons compete with native wildlife for food, which includes mammals, birds, and other reptiles. Severe mammal declines in Everglades National Park have been linked to Burmese pythons.

Scientists think that the issue is the pythons are killing alligators in the area. Which question below would BEST help to support the scientists theory?



A.
Do pythons squeeze their prey?

B.
Do pythons swim in water?

C.
Do homeowners trap and kill the Burmese python?



D.
Do more animals disappear in areas where pythons have been reported?

Answers

Answer:

[D] Do more animals disappear in areas where pythons have been reported?

Explanation:

Base on the given that:

Pythons compete with native wildlife for food, which includes mammals, birds, and other reptiles. Severe mammal declines in Everglades National Park have been linked to Burmese pythons.

Thus, the best question is Do more animals disappear in areas where pythons have been reported?

~lenvy~

D it is very true a lot of animals disappear because of the pythons

An environmental chemist would do which of the following?
a.
Determine where compounds and elements in the earth came from
c.
Study pollution or the shrinking ozone layer
b.
Study the reactions of compounds on the earth
d.
All of the above


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer:

Environmental chemists advise on the movement and outcome of contaminants in soil and groundwater, assess long-term risks to ecological and human health, apply for environmental permits to undertake corrective strategies, classify contaminated soils as hazardous waste and manage their disposal, and supervise onsite ...

Explanation:

Answer: the answer is all of the above

Explanation:brainliest will be nice

i have a question that goes with these

Answers

Answer:

i almost can see the thning

Explanation:

1 An autosome is one of the numbered chromosomes, as opposed to the sex chromosomes
2 XX and XY chromosomes
3 Diploid is a term that refers to the presence of two complete sets of chromosomes in an organism's cells, with each parent contributing a chromosome to each pair.
4 Haploid refers to the presence of a single set of chromosomes in an organism's cells
5 22 of these pairs are autos ones
9 An allele is a variation of the same sequence of nucleotides at the same place on a long DNA molecule

It has taken you 10 minutes to go 75 kilometers, How fast are you moving?

(And please do not respond with suspicious links :)

Answers

Answer:

450 kilometers per hour

Explanation:

6x75=450

Answer would be 450 km/h

How do digital signals compare to analog signals in terms of data transmission over long distances? Please write in an easy way so I can understand what your saying.

Answers

Answer:

Explanation:

The difference between analog and digital technologies is that in analog technology, information is translated into electric pulses of varying amplitude. In digital technology, translation of information is into binary format (zero or one) where each bit is representative of two distinct amplitudes.

Please Help me (I'll give brainlest) (LIMITED)

Answers

Answer:

I believe that the answered is being able to fetch

the answer is A: being able to fetch

what is a natural system???

Answers

Explanation:

a biological classification based upon morphological and anatomical relationships and affinities considered in the light of phylogeny and embryology
real number system, solar system, and planetary atmosphere circulation systems are examples of natural system.
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