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a_sh-v [17]
2 years ago
14

Which of the following statements are true?

Mathematics
1 answer:
attashe74 [19]2 years ago
5 0

The correct answer is option B that is Each white blood cell contains millions of haemoglobin molecules. All blood cells come from one pool of stem cells.

The complete question is given below:-

Which of the following statements are true?

I. Each white blood cell contains millions of haemoglobin molecules.

II. In a sample of blood, there are more red blood cells than white blood cells.

III. HIV destroys red blood cells.

IV. All blood cells come from one pool of stem cells.

A. II and IV only

B. I and IV only

C. II and III only

D. I, III, and IV only

E. I, II, and IV only

<h3>What are blood cells?</h3>

The most prevalent form of blood cell and the main source of oxygen for the bodily tissues of vertebrates, red blood cells are also known as red cells, red blood corpuscles, haematids, erythroid cells, or erythrocytes. They circulate through the blood through the circulatory system.

Therefore the correct answer is option B that is Each white blood cell contains millions of haemoglobin molecules. All blood cells come from one pool of stem cells.

To know more about blood cells follow

brainly.com/question/907662

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3 years ago
Fatima earned an 85 average in her science class. The average is based on 6 tests that she takes over the span of the marking pe
LenaWriter [7]

Answer:

Fifth Score = 87

Sixth Score = 95

Step-by-step explanation:

Given

Average = 85

Scores = 83, 78, 87, 80

Fifth\ score = x

Sixth\ Score = 8 + x

Required

Set up an equation

Solve for the fifth and sixth score

Average is calculated as thus:

Average = \frac{\sum x}{n}

Average = \frac{83 +78 + 87 + 80 + x + 8 + x}{6}

Substitute 85 for Average

85 = \frac{83 +78 + 87 + 80 + x + 8 + x}{6}

85 = \frac{83 +78 + 87 + 80 + 8+ x  + x}{6}

85 = \frac{336+ 2x}{6}

Multiply both sides by 6

85 * 6 = 336 + 2x

510= 336 + 2x

Solve for 2x

2x = 510 - 336

2x = 174

Solve for x

x = 174/2

x = 87

Hence:

<em></em>Fifth\ Score = 87<em></em>

<em></em>Sixth\ Score = 87 + 8<em></em>

<em></em>Sixth\ Score = 95<em></em>

3 0
3 years ago
3x + 5y = 78
zysi [14]
Hello here is a solution :
<span>3x + 5y = 78 .... (1)
2x - y = 0 ... (2)
from (2) : y = 2x
in (1) : 3x+5(2x) =78
            13x = 78
x= 6
 but : y =2x    y=2(6) = 12
answer : x=6</span>
5 0
3 years ago
Read 2 more answers
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