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borishaifa [10]
3 years ago
7

How was the the Hershey chase blender experiment conducted?

Biology
1 answer:
spin [16.1K]3 years ago
8 0
The answer is D I really hope it helps
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We are studying 3 strains of bacteria, with populations p1, p2, p3, in an environment with three food sources, A, B, C. In a day
Nastasia [14]

Answer:

The population of each bacteria in 1, 2, 3 are 12, 8, and 7 respectively.

Explanation:

From the given information:

For  food source A; we have:

3P₁ + P₂ + 2P₃ = 58    units of food A ---- (1)

For food source B; we have:

2P₁ + 4P₂ + 2P₃ = 70   units of food B  ---- (2)

For food source C; we have:

P₁ + P₂  = 20   units of food C    ----- (3)

From equation (1) and (2); we have:

3P₁ + P₂ + 2P₃ = 58

2P₁ + 4P₂ + 2P₃ = 70

By elimination method

 3P₁ + P₂ + 2P₃ = 58

-

 2P₁ + 4P₂ + 2P₃ = 70

<u>                                       </u>

<u> P₁  -   3P₂   + 0    = - 12    </u>

P₁ = -12 + 3P₂   ---- (4)

Replace, the value of P₁  in (4) into equation (3)

P₁ + P₂  = 20

-12 + 3P₂ + P₂  = 20

4P₂ = 20 + 12

4P₂ = 32

P₂ = 32/4

P₂ = 8

From equation (3) again;

P₁ + P₂  = 20

P₁ + 8 = 20

P₁  = 20 - 8

P₁  = 12

To find P₃;  replace the value of P₁ and P₂ into (1)

3P₁ + P₂ + 2P₃ = 58

3(12) + 8 + 2P₃ = 58

36 + 8 + 2P₃ = 58

2P₃ = 58 - 36 -8

2P₃ = 14

P₃ = 14/2

P₃ =  7

Thus, the population of each bacteria in 1, 2, 3 are 12, 8, and 7 respectively.

4 0
3 years ago
Biology may answer many questions, but it’s main focus is
bezimeni [28]
 Biology answers many questions<span>, </span>but its main focus is<span> how living organisms interact and function.
hope it helped give thanks :)
</span>
6 0
3 years ago
Read 2 more answers
Which of the following statements about action potentials in a given neuron is false? a. All action potentials for a given neuro
BabaBlast [244]

Answer:

They are propogated down the length of the dendrite

3 0
3 years ago
Ms. S, a 78-year-old black female, is brought to the emergency room by her son who reports that she has been vomiting violently
lawyer [7]

Answer:

1. Severe dehydration

2. Investigations required will include serum urea, electrolytes and creatinine (U/E/Cr), full blood count and differentials, urinalysis, urine microscopy, culture and sensitivity, renal ultrasound, random blood glucose.

3. Deranged U/E/Cr that is urea, creatinine and sodium are elevated which indicate kidney injury. There is proteinuria, haematuria, positive nitrate and leucouria points towards UTI. The WBC is high which indicate infection.

5. She is likely to have prerenal AKI

6. The concern is that she is not regular on her antihypertensive medication, and hypertension can cause renal impairment ( hypertensive nephropathy). There is need for dialysis if there is markedly elevated E/U/Cr or renal impairment was very severe.

Explanation:

Acute kidney injury is when there is sudden and often reversible loss of renal function which develops over days or weeks and is usually accompanied by a reduction in urine output.

There are many causes of AKI, which are classified as prerenal, renal and post renal. In prerenal AKI, the kidneys gets damaged as a result of hypoperfusion leading to acute tubular necrsosis. Common examples are severe dehydration( like in this patient from vomiting), cardiac failure, sepsis, blood loss etc. Renal AKI is usually cause by direct insult to the kidneys which can result from drugs, toxins, inflammatory conditions etc. Post renal AKI occurs when there is obstruction to urine flow at any point from the tubule to the urethra e.g in BPH, stones, strictures etc.

In Prerenal AKI, it leads to acute tubular necrosis. Histologically, the kidney show inflammatory changes, focal breaks in the tubular basement membrane and interstitial oedema.

Chronic kidney disease(CKD) refers to an irreversible deterioration in renal function which develops over a period of years.initially, it is manifestation only as biochemical abnormality but eventually, loss of the excretory, metabolic and endocrine functions of the kidneys leads to clinical symptoms and signs of renal failure.

7 0
3 years ago
The endocrine system is a collection of glands that secrete __________ into the bloodstream
Sholpan [36]
Answer: HORMONES

Hope this is correct :-)
3 0
3 years ago
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