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3 years ago

Which of the following are characteristics of vertebrates?

2 answers:

5 0

Answer:
All of the above

Explanation:
Vertebrates are a class of creatures falling under kingdom "Animalia" that are characterized by the presence of an internal skeleton composed of bones.

Vertebrates are characterized by the following:
1- presence of internal skeleton
2- developed brain
3- the presence of an advanced nervous system connected to the brain
4- presence of muscles that allow movement
5- protective skin
6- circulation of blood in the bodies in the vessels

Comparing the mentioned characteristics with the options given, we will find that the most suitable answer is: "all of the above".

Hope this helps :)

Naddika [18.5K]3 years ago

3 0

Answer:

The correct answer is option D, that is, all of the above.

Explanation:

Vertebrata refers to the subphylum of Chordata, which is further illustrated by their bony backbone. Vertebrates comprise the members of the subphylum Vertebrata, which comes under the kingdom Animalia and under the phylum Chordata.

The following are the characteristics of Vertebrates:

1. Developed brain.

2. Existence of an internal skeleton.

3. Presence of muscles, which helps in movement.

4. The existence of an advanced nervous system associated with the brain.

5. Circulation of blood in the bodies via vessels.

6. Protective skin.

Hence, the correct answer is option D, that is, all of the above.

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Determine the number of protons, electron and neutrons present in an atom of magnesium

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Protons= 12, Electrons= 12, neutrons= 12

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3 years ago

Given the following data in the Determination of Molar Mass of CO2 lab : Mass (before rxn): test tube HCl(aq) stir bar capsule 2

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Answer:

.259 g

Explanation:

PV = nRT

n = PV / RT

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= .005897 moles

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3 years ago

Perform the following unit conversions:

Y_Kistochka [10]

Answer :

(a) The 60 feet of water is equal to 179344.2 Pa.

(b) The 220 psi is equal to $31680lbf/ft^2$

(c) The 120 torr is equal to 15998.6 Pa.

(d) The 1.0 atm to inches of glycerin is equal to 323.07 inches.

(e) The 1050 mm Hg is equal to $376.95lbf/ft^2$

Explanation :

(a) The conversion used from feet to pascal is:

$1\text{ feet}=2989.07Pa$

As we are given that 60 feet of water. Now we have to convert into Pa.

As, $1\text{ feet}=2989.07Pa$

So, $60\text{ feet}=\frac{60\text{ feet}}{1\text{ feet}}\times 2989.07Pa=179344.2Pa$

The 60 feet of water is equal to 179344.2 Pa.

(b) The conversion used from $psi$ to $lbf/ft^2$ is:

$1\text{ psi}=144lbf/ft^2$

As we are given that 220 psi. Now we have to convert into $lbf/ft^2$ .

As, $1\text{ psi}=144lbf/ft^2$

So, $220\text{ psi}=\frac{220\text{ psi}}{1\text{ psi}}\times 144lbf/ft^2=31680lbf/ft^2$

The 220 psi is equal to $31680lbf/ft^2$

(c) The conversion used from torr to pascal is:

$1\text{ torr}=133.322Pa$

As we are given that 120 torr. Now we have to convert into Pa.

As, $1\text{ torr}=133.322Pa$

So, $120\text{ torr}=\frac{120\text{ torr}}{1\text{ torr}}\times 133.322Pa=15998.6Pa$

The 120 torr is equal to 15998.6 Pa.

(d) 1.0 atm to inches of glycerin

Formula used : $P=\rho gh$

where,

P = pressure of glycerin = 1.0 atm = 101325 Pa

g = acceleration due to gravity = $9.8m/s^2$

$\rho$ = density of glycerin = $1260kg/m^3$

Now put all the given values in above formula, we get:

$101325Pa=(1260kg/m^3)\times (9.8m/s^2)\times h$

$h=8.206\frac{Pa.m^2s^2}{kg}=8.206m=323.07\text{ inches}$

Conversion used :

$1Pa=\frac{kg}{ms^2}\\\\1m=39.37inches$

The 1.0 atm to inches of glycerin is equal to 323.07 inches.

(e) The conversion used from $psi$ to $lbf/ft^2$ is:

$1\text{ mmHg}=0.359lbf/ft^2$

As we are given that 1050 mmHg. Now we have to convert into $lbf/ft^2$ .

As, $1\text{ mmHg}=0.359lbf/ft^2$

So, $1050\text{ mmHg}=\frac{1050\text{ mmHg}}{1\text{ mmHg}}\times 0.359lbf/ft^2=376.95lbf/ft^2$

The 1050 mm Hg is equal to $376.95lbf/ft^2$

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3 years ago

Which type of reaction creates more energy nuclear or chemical

lubasha [3.4K]

Answer:

Nuclear

Explanation:

Nuclear produces more energy than chemical.

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~Hope this helped! :)

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3 years ago

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