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3 years ago

In sexual reproduction, what helps to maintain genetic variation?

Biology

2 answers:

fomenos3 years ago

8 0

Answer:

The answer is a because it will give you genetic variation

rewona [7]3 years ago

3 0

The answer is A.) reduction division and fertilization

I took the test got it correct

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Which molecule is carrying electrons with the highest energy?

jeyben [28]

The answer is C.NADH

3 0

3 years ago

Calculate the mass of glucose metabolized by a 78.8 kg person in climbing a mountain with an elevation gain of 1570 m . Assume t

bearhunter [10]

Answer:

The mass of glucose metabolized by a 78.8 kg person in climbing a mountain with an elevation gain of 1570 m, is 311.5 grams

Explanation:

Step 1: Data given

Mass of the person = 78.8 kg

elevation = 1570 meters

Molar mass of glucose = 180.16 g/mol

Standard enthalpy of combustion of glucose = -2805 kJ/ mol

Step 2:

W = m*g*h

with m = mass of the person in kg = 78.8 kg

with g = acceleration due to gravity = 9.81 m/s²

with h = height in meters = 1570 meters

W = 78.8 * 9.81 * 1570 = 1213653.96 J = 1.213 *10^6 J

Step 3: Calculate actual work

Actual work = 4W = 4.85 *10^6 J = 4.85 *10³ kJ

Step 4: Calculate moles glucose

Moles glucose = work / standard enthalpy

Moles glucose = 4.85 *10³ kJ / 2805 kJ/mol = 1.729 moles

Step 5: Calculate mass of glucose

Mass glucose = moles glucose * Molar mass glucose

Mass glucose = 1.729 moles * 180.16 g/mol

Mass glucose = 311.5 grams

The mass of glucose metabolized by a 78.8 kg person in climbing a mountain with an elevation gain of 1570 m, is 311.5 grams

8 0

3 years ago

How much 3M NaOH (MW=40) can be made from 10.0mL of a 10M solution?

vaieri [72.5K]

Explanation:

The given data is as follows.

$M_{1}$ = 3 M, $V_{1}$ = ?

$M_{2}$ = 10 M, $V_{2}$ = 10.0 ml

Therefore, calculate the volume of given solution as follows.

$M_{1} \times V_{1}$ = $M_{2} \times V_{2}$

Now, putting the given values into the above formula as follows.

$M_{1} \times V_{1}$ = $M_{2} \times V_{2}$

$3 M \times V_{1}$ = $10 M \times 10.0 ml$

$V_{1}$ = 33.3 ml

or, = 0.033 L (as 1 ml = 0.001 L)

Since, molarity of NaOH is given as 3 M and its volume is calculated as 33.3 ml.

Molarity = $\frac{\text{mass of solute}}{\text{molar mass of solute}} \times \frac{1}{\text{volume in L}}$

3 M = $\frac{mass}{40 g/mol \times 0.033 L}$

mass = 3.96 g

Therefore, we can conclude that mass of NaOH is 3.96 g.

8 0

3 years ago

What essential natural resource is produced by weathering activity? water soil air?

Sunny_sXe [5.5K]

Weathering is a process where the rocks and minerals are dissolved and broken down on the surface of the earth.

After weathering, a process called erosion takes place which transports the bits of rocks and minerals. Weathering helps in smoothening of the sharp and rough rocks.

This process also helps in creating SOIL due to the mixing of the tiny rock bits with the remains of animals and plants.

5 0

2 years ago

Why was the Nationalist Party more popular in China’s cities than in the countryside? Wealthy people who supported the party wer

erik [133]

Answer:

Wealthy people who supported the party were concentrated in cities.

Explanation:

7 0

3 years ago