How does oxygen enter the urchins system?

Answers

Answer 1

Answer:    

Enters through the gills and tubed feet.

Explanation:

The oxygen obtained by a Purple Sea Urchin is dissolved in water.  Oxygen enters through the gills and tubed feet. When the oxygen level is low in a Purple Sea Urchin, muscles associated with Aristotle's Lantern pump fluid through the body (through the canals).

Any Questions?

Answer 2

Oxygen enters the sea urchin's system through the respiratory system, which is through the water vascular system, as the echinoderms have a significant type of system that helps them take the oxygen from the water.

What is the water vascular system?

The water vascular system is seen in the phylum of the echinodermata, which is essentially a network of canals and tube feet that run throughout the urchin's body, and the tube feet are helpful for the attachment to the surface and for the respiration. When the tube feet are extended, oxygen from the water diffuses across the walls of the tube feet and into the urchin's body, while carbon dioxide is released into the water.

Hence, oxygen enters the sea urchin's system through the respiratory system, which is through the water vascular system, as the echinoderms have a significant type of system that helps them take the oxygen from the water.

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Related Questions

Hamsters are long haired if they have the genotype LL or Ll and they are short haired if they have the genotype ll. A long haired hamster is mated with a short haired hamster. Half of the offspring are long haired and half are short haired. This allows us to conclude that the long-haired parent hamster

Answers

Answer:

Has the genotype Ll (heterozygous)

Explanation:

Here are the two punnett squares I did, hope this helps :)

What two nations were at the center of the Space Race in the 1950's Australia and Russia .China and United States .United States and Russia .
Russia and China​

Answers

Answer:The Space Race was a 20th-century competition between two Cold War adversaries, the Soviet Union (USSR) and the United States (US), to achieve superior spaceflight capability.

Explanation:

i looked it up

The two nations that were at the center of the Space Race in the 1950s should be considered  Russia and China.

What is Space Race?

The Space Race was the competition held in 20the century that lies between the two Cold War adversaries i.e. soviet union and the united stated for accomplishing the superior spaceflight capability.

Also, it has its origin in the ballistic missile that based on the nuclear arms race.

Learn more about the nation here: https://brainly.com/question/365702?referrer=searchResults

The sea cools down faster than the land.
A. True
B. False

Answers

Answer:

false the land cools faster

How are sexual reproduction and asexual reproduction different?
Group of answer choices

A. Asexual reproduction only occurs in multicellular organisms, but sexual reproduction only occurs in unicellular organisms

B. Asexual reproduction produces offspring identical to the parents, but sexual reproduction produces offspring with traits from both parents.

C. Sexual reproduction produces offspring identical to the parents, but asexual reproduction produces offspring with traits from both parents.

D. Sexual reproduction only occurs in multicellular organisms, but asexual reproduction only occurs in unicellular organisms.

Answers

Answer:

B

Explanation:

In asexual reproduction, the offspring has identical genes/traits to the one of its parent.

In sexual reproduction, there's a combination of the genes/traits from both parents.

HELPP

Which of the following is a correct statement about the water molecule?


The hydrogen end is more negative than the oxygen end because hydrogen pulls the shared electrons towards its end of the molecule.


The oxygen end is more negative than the hydrogen end because oxygen pulls the shared electrons towards its end of the molecule.


There is no overall chrage on either end of the water molecule.

Answers

Answer:

it should be B

Explanation:

I hope this helps

among cattle having horns is a recessive trait cattle without horns which are called polled cattle are common suppose a horned male mates with a polled female their offspring are polled on maturity two cattle on the f1 generation mated their offspring are a mix of polled and horned cattle

Answers

Answer:

Correct

Explanation:

It’s always more likely that the dominant gene will show than the recessive gene.

What produces gene flow?
ws
O mating between populations
O mutation
O geographical isolation
O speciation

Answers

Answer:

O mutation

Explanation:

please mark this answer as brainliest

What happens when the phosphate bonds of ATP break?
A) Acid is neutralized.
B) Energy is stored.
C) Energy is released.
D) An organism becomes sick.

Answers

Answer:

C ender is released

Explanation:

the energy stored in the phosphate bonds hold the energy, when the bond breaks the energy stored is released

Answer: C

Explanation:

PLZ HELP ASAP will give brainiest
Which statement best explains how humans would benefit from replacing fossil fuels with geothermal energy?

Less cost-effective over time
Lower installation costs than fossil fuel plants
More energy plant locations available
Less pollution than fossil fuel plants

Answers

I would say less pollution than fossil fuel plants - but i’m not sure
its- less pollution than fossil fuel plants

Can someone please help me with this? I can’t figure it out.
Please only answer if you know it.
Thank you in advance.

Also it does not appear that clear.

Answers

Answer:

1. B, C, F

2. Outside air, nose, lungs, bloodstream, cell

3. Delivery truck, raw material, factory, battery, poison

I hope this helps! Have a great night!

answers to ten and tweleve please giving brainlist

Answers

Answer:

A and D

Explanation:

the Calvin cycle in photosynthesis doesn't need sunlight and this worksheet seems to focus on energy from the sun and how it is used in plants

All members of the Eukarya domain have which of the following characteristics?
Have a nucleus
Are multicellular
Are heterotrophic
Reproduce sexually

Answers

Answer:

A. Have a nucleus.

Explanation:

I hope this helps.

The higher the hydrogen ion concentration, the _______ the pH.
please help answer i need to turn this in asap.

Answers

Answer:

here is your answer : )

Explanation:

The answer is lower the pH

hope you like the answer : )


What does the word photosynthesis mean?
Light + energy
Energy + mass
Light + put together
Energy + sugar

Answers

Answer:

Hey mate.....

Explanation:

This is ur answer.....

--> Light + Put together

Hope it helps!

Brainliest pls......

Follow me! ;)

What is the relationship between aquifers and porosity?

Answers

Answer:

The pore space of an aquifer is the spaces or voids between the solid material. The porosity of the aquifer is the volume of void space to the total volume, typically expressed as a percentage.

what do endocrine glands use as Messengers?

A. Blood
B. Hormones
C. Target Organs
D. Zygote

Answers

Answer:

b. hormones

Explanation:

"The endocrine system is made up of glands that make hormones. Hormones are the body's chemical messengers. They carry information and instructions from one set of cells to another"

Answer:

b have a good day

Explanation:

A patient in the hospital is undergoing testing. The patient's brain is sending electrical signals to motor neurons, but the muscles are not moving in response. What could be a likely cause for this? Explain your answer using complete sentences.

Answers

Answer:

Damage to interneurons.

Explanation:

The main cause of this situation is the damage occurs to the interneurons which is responsible for sending of instructions. The motor neurons can't receive the instruction from the central nervous system which results no movement of muscles. There must be damaged occur to interneurons because these neurons are responsible for sending instructions from central nervous system so if the information can be passed to the motor neurons so no movement occurs in the muscles.

PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.

Answers

Mesozoic, the era contained both large reptiles and small birds/mammals. It's interesting, coming from an evolutionary biology.

Hope this helped!

Answer:

C. Mesozoic Era

Explanation:

It makes sense because Dinosaurs existed during that era and became extinct after that era.

Which point on the graph represents carrying capacity when full?
A.
B.
C.

Answers

It’s should be: C, from looking at the graph

8. In a population of beetles, there is a gene for color with two codominant alleles. The allele R leads to red beetles and the allele B leads to blue beetles. Heterozygous beetles are red and blue spotted. A heterozygous beetle mates with a red beetle. What is are the genotypic and phenotypic frequencies of their offspring? Please show all of your work. (2)

Answers

Answer:

The genotypic frequency = 1:1

The phenotypic frequency = 1:1

Explanation:

Given that:

The allele → R = Red beetles

The allele → B = Blue beetles

Since the gene color shows a codominant allele

The Red Beetle = RR

The blue beetles will be = BB

The heterozygous beetle will be = RB

The punnet square showing the crossing of RB × RR is:

                R                   B

R                RR               RB

R                RR               RB

The result shows that we have two red beetles and two heterozygous beetles.

Hence;

The genotypic frequency = 1:1

The phenotypic frequency = 1:1

10.) What hormone is released due to the rising level of estrogen in the bloodstream?​

Answers

Answer:

10.) What hormone is released due to the rising level of estrogen in the bloodstream?

A) When the level of estrogen is sufficiently high, it produces a sudden release of LH, usually around day thirteen of the cycle.

-TheUnknownScientist

Answer:

LH hormone is released due to the rising level of estrogen in the bloodstream.

HELP ASAP WILL GIVE BRANLIST!!! How many moles of water are produced when 6.0 moles of hydrogen gas react with 2.5 moles of oxygen gas?

Balanced equation: 2H2 + O2 → 2H2O (5 points)


2.5 moles of water

3.0 moles of water

5.0 moles of water

6.0 moles of water

Answers

Answer:5.0 moles of water

Explanation:

Which of the following is NOT a way to prevent the spread of infectious disease?
A. Get vacinated
B. Rinse dirty cutting boards with cold water
C.Don't share personal items
D.Wash your hands

Answers

Answer: I think B

Explanation:

The movement of the Earth around its own axis is called _____.

A. extension

B. revolution

C. rotation


Choose the correct answer.''

Answers

Answer:

rotation

Explanation:

Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution.

the action of rotating about an axis or centre.
answer: rotation

In the logistic growth model, as a population approaches the carrying capacity, what happens to its growth rate?
A
becomes exponential

B
doubles

C
increases

D
slows to zero

Answers

I am pretty sure it is D slows to zero, don’t get mad at me if I’m wrong I’m pretty sure I am correct though.

In the logistic growth model, as a population approaches the carrying capacity, the growth rate of the population will slow down to zero. Thus, the correct option is D.

What is Logistic growth model?

The logistic growth model is a parameter which represents the rate at which the population would grow if it were unencumbered by the environmental degradation. A second parameter, that is K, represents the carrying capacity of the system of species which are being studied.

In logistic growth, a population's per capita growth rate gets smaller and smaller as the population size when it approaches a maximum imposed by the limited resources in the environment, known as the carrying capacity (K). Exponential growth model produces a J-shaped curve, while logistic growth produces an S-shaped curve.

Therefore, the correct option is D.

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ALGAE --> COPEPODS --> ANCHOVIES --> STRIPED BASS
Which organism in this food chain is most responsible for converting solar energy to chemical energy?

A
anchovies

B
algae

C
copepods

D
striped bass

Answers

Answer:

B

Explanation:

only plants convert solar energy to chemical energy.

HELPPP PLS i need helppp

Answers

Answer:

is this a genetic diagram u need to be filled out or nah?

QUICK!!!

What does Earth’s revolution around the sun cause?

Earth's phases

Earth's day & night

Earth's year

Moon day & year

Answers

earths year because when earth travels around the sun it is equal to earths full year

cion
Fully explain how speciation occurred on the
Galapagos Islands using 3-4 complete
sentences.
PLEASE HELPP!!

Answers

im not very sure but since they have different small islands, the animals travel to different and change according to the weather living conditions and food there

????????????????????????????????????????? What is the answer to number 2 and 3 I’m really confused

Answers

Answer:

2. High

3. Low

Explanation:

4. Sinking air compresses and heats. As air sinks, air pressure at the surface is raised.

3. As air rises, air pressure at the surface is lowered

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