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3 years ago

Sand dollars are radially symmetrical and have an internal skeleton but no backbone. Which phylum do sand dollars belong in?

Biology

2 answers:

Taya2010 [7]3 years ago

6 0

Answer:

echinoderms

Explanation:

I hope this helps

-BARSIC- [3]3 years ago

3 0

Answer:

echinoderms

Explanation:

they are in the same family as starfish and sea urchins

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What caused the Napier, NZ earthquake to happen?

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The earth moving and shifting the ground below.

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A titratable group is in the active site of an enzyme and must be protonated for the enzyme to function. Assume that the group h

olya-2409 [2.1K]

Answer:

The correct option is 3. "At pH 6.5 the enyzme is 50% active"

Explanation:

For the titratable group to be protonated and cause the enzyme to be in the active state, it needs to have gained a hydrogen cation (H+). In order for that to happen, there must be enough hydrogen cations in the environment of the enzyme, and hence, an acidic pH is required in this case.

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4 years ago

Why are enzymes necessary? to the rate of decomposition to act as a catalyst in chemical reactions to conserve the stored energy

mario62 [17]

Enzymes acts as a catalyst in chemical reactions to speed up the rate of reaction.

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3 years ago

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Of the following elements, which is the MOST reactive?

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4 years ago

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Gravity is the force that objects exert on each other because of their masses. The strength of the gravitational force between t

LuckyWell [14K]

If one of the masses is doubled, the force of gravity between the objects is doubled.

As distance between the objects increases, the force of gravity decreases.

Greater mass results in greater force

Explanation:

Gravity is related to mass and distance as proposed by the newton's law of universal gravitation.

The law states that "the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional the the square of the distances between them. ".

Mathematically we have:

F ∝ m₁ m₂

F ∝ $\frac{1}{r^{2} }$

m is the mass of the body

r is the distance between them.

We can simply understand that the greater the mass, the greater the force.

Also the higher the distance between the objects, the lesser the force of gravity between them.

Now, ;

F = $\frac{G m_{1} m_{2} }{r^{2} }$

if the mass is double the force becomes doubled too.

if m₁ = 2m₁

F₁ = $\frac{G m_{1} m_{2} }{r^{2} }$

F₂ = $\frac{G 2m_{1} m_{2} }{r^{2} }$

equation F₁ and F₂, we can see that F₂ is twice F₁

learn more:

Universal gravitation brainly.com/question/1724648

#learnwithBrainly

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