5AgNO3 Ag = N= O = vfv

An outbreak of food poisoning occurs at a family picnic after the growth of Staphylococcus aureus in refrigerated potato salad l

kozerog [31]

Answer:

clusters of round shape bacteria

Explanation:

Microscopic examination of the potato salad should reveal clusters of round shape bacterium.

Staphylococcus or Staphylococcal are those that are round in shape (from the word 'coccus') and occur in clusters as opposed to individually or in chains. The word is derived from two Greek words - staphyle which means bunch of grapes and kokkos which means to be round.

Hence, when a magnified image of the Staphylococcus aureus is produced by the microscope, clusters of round shape bacteria would be seen.

3 0

3 years ago

If snails use lungs to breathe, which gas do they release into their

Vedmedyk [2.9K]

The snail would release Carbon Dioxide like humans do.

8 0

4 years ago

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Imagine that you attempted to recreate Mendel's work with garden peas. You began by crossing true breeding violet-flowered, tall

salantis [7]

Answer:

(a) 90

(b) 30

(c) 30

(d) 10

F2 data for stem length (tall:dwarf) is consistent with Mendel's law of segregation.

F2 data for stem length (tall:dwarf) and flower color (violet:white) is consistent with Mendel's law of independent assortment

Explanation:

The F2 phenotypes are supposed to be in 9:3:3:1 according to Mendelian law. The total number of F2 progeny is: 80 + 36 + 39 + 5 = 160

(a) Hence, the expected number of tall, violet plants will be:

9/16 x 160 = 90

(b) Expected number of tall, white plants will be:

3/16 x 160 = 30

(c) Expected number of dwarf, violet plants will be:

3/16 x 160 = 30

(d) Expected number of dwarf, white plants will be:

1/16 x 160 = 10.

Total number of tall F2 plants = 80 + 36 = 116

Total number of dwarf F2 plants = 39 + 5 = 44

Expected ratio of tall:dwarf plants according to Mendel = 3:1

Expected number of tall plants = 3/4 x 160 = 120

Expected number of dwarf plants = 1/4 x 160 = 40

Chi square $X^2$

= $\frac{(observed frequency - expected frequency)^2}{expected frequency}$

$X^2$ for tall = $\frac{(116 - 120)^2}{120}$

= 0.1333

$X^2$ for dwarf = $\frac{(44 - 40)^2}{40}$

= 0.40

Total $X^2$ = 0.1333 + 0.4

0.5333

Degree of freedom = n - 1

2 - 1 = 1

Tabulated $X^2$ (α = 0.05) = 3.841

Since the tabulated $X^2$ is more than the calculated $X^2$ , the hypothesis that the F2 data for stem length (tall:dwarf) is consistent with Mendel's law of segregation is accepted.

Observed Expected $X^2$

tall, violet flowers 80 90 $\frac{(80-90)^2}{90} = 1.11$

tall, white flowers 36 30 $\frac{(36-30)^2}{30} = 1.2$

dwarf, violet flowers 39 30 $\frac{(39-30)^2}{30} = 2.7$

dwarf, white flowers 5 10 $\frac{(5-10)^2}{10} = 2.5$

Total 160 160 7.51

Degree of freedom = 4 - 1 = 3

Tabulated $X^2$ (α = 0.05) = 7.815

The tabulated $X^2$ value is more than the calculated $X^2$ value. Hence, F2 data for stem length (tall:dwarf) and flower color (violet:white) is consistent with Mendel's law of independent assortment.

3 0

3 years ago

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

alexgriva [62]

Answer:

Chemical Weathering

Explanation:

3 0

3 years ago

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Brian is a 15-month-old male whose screening hemoglobin is 10.4 g/dl. treatment for his anemia should be:

schepotkina [342]

Hemoglobin is the part of the red blood cell that carries oxygen, and so important for thriving. In the case of Brian, having 10.4 g/dL hemoglobin is very low. Normal values for hemoglobin in males range from 13.5 to 17.5 g/dL. The patient has very serious anema and note he is just 15 months old, and so needs immediate doctor’s attention. The doctor is likely to order a blood transfusion to elevate hemoglobin levels and stabilize the patient before ordering tests to determine cause of anemia.

7 0

3 years ago