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4 years ago

Describe how a eukaryotic cell's chromosomes change as a cell prepares to divide

2 answers:

8 0

<span>The eukaryotic cell's chromosomes undergoes DNA wrapping as it prepares to divide. It wraps around proteins and the chromosomes condense to thicker and more visible one. This is essential to the process in order to make sure that the DNA is still intact and also it eases the cell's division.
</span>

Mila [183]4 years ago

6 0

The chromosomes when a cell is about to divide are formed by DNA wrapping its self around histone proteins and so the chromosomes condense and become thicker and visible this is important as it makes sure that the DNA is all organised and eases the cells division

hope that helps

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The temperature of a sample of silver increased by 23.8 °C

PIT_PIT [208]

Answer:

46.67 g

Explanation:

From the question given above, the following data were obtained:

Change in temperature (ΔT) = 23.8 °C

Heat (Q) = 261 J

Specific heat capacity (C) of silver = 0.235 J/gºC

Mass of silver (M) =?

The mass of the sample of silver can be obtained as follow:

Q = MCΔT

261 = M × 0.235 × 23.8

261 = M × 5.593

Divide both side by 5.593

M = 261 / 5.593

M = 46.67 g

Thus, the mass of the sample of silver is 46.67 g

3 0

3 years ago

Safrole was once used as a flavoring in root beer, until it was banned in 1960. what is the vapor pressure of a solution prepare

BartSMP [9]

Answer is: 48,25 torr.
Raoult's Law: p = x(solv) · p(solv)
p - <span>vapour pressure of a solution.
</span>x(solv) - <span>mole fraction of the solvent.
</span>p(solv) - <span>vapour pressure of the pure solvent.
</span>n(ethanol) = 950g ÷ 46,07g/mol = 20,62 mol.
x(solv) = moles of solvent ÷ total number of moles
x(solv) = 20,62 ÷ 21,77 = 0,965.
p = 0,965 ·50,0 torr = 48,25 torr.

4 0

3 years ago

Read 2 more answers

Explain why the equation ( x - 4 ) ^2 - 28 =8 has two solutions. Then solve the equation to find the solutions. Show your work.

algol13

Taking into account the discriminant and quadratic formula:

As Δ> 0 the function has two real roots or solutions.
The solutions are x1= 10 and x2= -2.

<h3 />

Zeros or solutions of a function

The points where a polynomial function crosses the axis of the independent term (x) represent the so-called zeros of the function.

That is, the zeros represent the roots of the polynomial equation that is obtained by making f(x)=0.

In summary, the roots or zeros of the quadratic function are those values of x for which the expression is equal to 0. Graphically, the roots correspond to the abscissa of the points where the parabola intersects the x-axis.

<h3>Discriminant</h3>

The function f(x) = ax² + bx + c

with a, b, c real numbers and a ≠ 0, is a function quadratic expressed in its polynomial form (It is so called because the function is expressed by a polynomial).

The following expression is called discriminant:

Δ= b²- 4×a×c

The discriminant determines the amount of roots or solutions of the function.

Then:

If Δ <0 the function has no real roots and its graph does not intersect the x-axis.
If Δ> 0 the function has two real roots and its graph intersects the x-axis at two points.
If Δ = 0 the function has a real root and its graph intersects the x-axis at a single point that coincides with its vertex. In this case the function is said to have a double root.

<h3 /><h3>Amount of solutions of function (x - 4)² - 28 =8</h3>

The function (x - 4)² - 28 =8 can be expressed as:

(x - 4)² - 28 -8= 0

(x - 4)² - 36= 0

x²- 8x + 16 - 36= 0

x²- 8x - 20= 0

Being:

a= 1
b= -8
c= -20

the amount of solutions are calculated as:

Δ= (-8)²- 4×1×(-20)

Δ= 144

As Δ> 0 the function has two real roots or solutions and its graph intersects the x-axis at two points.

<h3>Solutions of a cuadratic function</h3>

In a quadratic function that has the form:

f(x)= ax² + bx + c

the zeros or solutions are calculated by:

$x1,x2=\frac{-b+-\sqrt{b^{2}-4ac } }{2a}$

<h3>Solutions of function (x - 4)² - 28 =8</h3>

The function (x - 4)² - 28 =8 can be expressed as x²- 8x - 20= 0

Being:

a= 1
b= -8
c= -20

the solutions of the function are calculated as:

$x1=\frac{-(-8)+\sqrt{(-8)^{2}-4x1x(-20) } }{2x1}$

$x1=\frac{-(-8)+\sqrt{144 } }{2x1}$

$x1=\frac{8+\sqrt{144 } }{2}$

$x1=\frac{8+12 }{2}$

$x1=\frac{20}{2}$

x1= 10

and

$x2=\frac{-(-8)-\sqrt{(-8)^{2}-4x1x(-20) } }{2x1}$

$x2=\frac{-(-8)-\sqrt{144 } }{2x1}$

$x2=\frac{8-\sqrt{144 } }{2}$

$x2=\frac{8-12}{2}$

$x2=\frac{-4}{2}$

x1= -2

Finally, the quadratic function (x - 4)² - 28 =8 has two solutions and the solutions are x1= 10 and x2= -2.

Learn more about the zeros of a quadratic function:

<u>brainly.com/question/14477557</u>

<u>brainly.com/question/842305</u>

<u>brainly.com/question/14477557</u>

7 0

3 years ago

A _____________________ Graph is in the shape of a straight line,while a _______________ graph is not a straight.

Nostrana [21]

I believe it is linear and nonlinear

6 0

3 years ago

Read 2 more answers

Wht is the boiling point of plastic

Schach [20]

Of the six commonly recycled plastics, four can withstand temperatures of 100 degrees Celsius (212 degrees Fahrenheit) or above. According to Machinist Materials, polyethylene terephthalate -- PET, or recyclable 1 -- has a melting point of 255 degrees Celsius (491 degrees Fahrenheit).

6 0

3 years ago

Read 2 more answers