Why is a small cell better than a big cell?

1 answer:

6 0

Cells are small because the ratio of surface area to volume is the most efficient at their size. This is because when you have a lot of small objects vs a few big objects the surface area is much larger in relation to volume.

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Two independently segregating genes determine kernel color in wheat. Red color results from at least one dominant allele in both

Lera25 [3.4K]

Answer:

a) The expected phenotype of the F1 plants is 100% RrBb, red kernels.

b) The expected phenotypic classes in the F2 are: 9:3:3:1

9/16 R-B-, 3/16 rrB-, 3/16 R-bb, 1/16 rrbb

Proportions 9:6:1.

9/16 Red kernel (R-B-), 6/16 Brown kernel (rrB- + R-bb), 1/16 White kernel (rrbb)

Explanation:

Available data:

red kernel: R-B-

brown kernel: R-bb or rrB-

white kernel: rrbb

1º Cross) RRBB x rrbb

F1) 100% RrBb (red kernels)

2ºCross) RrBb x RrBb

Gametes) RB RB

Rb Rb

rB rB

rb rb

Punnet Square) RB Rb rB rb

RB RRBB RRBb RrBB RrBb

Rb RRBb RRbb RrBB Rrbb

rB RrBB RrBb rrBB rrBb

rb RrBb Rrbb rrBb rrbb

F2) Phenotypic classes:

9/16 R-B-

 3/16 rrB-

 3/16 R-bb

 1/16 rrbb

Phenotypic proportions:

9/16 Red kernel (R-B-)

6/16 Brown kernel (rrB- + R-bb)

1/16 White kernel (rrbb)

7 0

3 years ago

Is forensic science the most important type of evidence to present at a trial

crimeas [40]

Your answer will be Physical evidence it give people the chance when they find something that's a important like a weapon,or hair it gives experts the chance to see if they can figure out what happen so they can catch the guy who caused it to happen.

So your answer is Physical Evidence.

5 0

3 years ago

Refeeding syndrome is a potentially fatal complication of overfeeding. why is refeeding syndrome so dangerous?

eduard

It might cause harmful changes in the serum phosphorus and other electrolytes. So, Refeeding syndrome so dangerous.

<h3>What is serum phosphorus?</h3>

The serum phosphorus test quantifies the phosphate levels in the blood.
A vein, typically on the back of the hand or the inside of the elbow, is used to draw blood.
When hypoparathyroidism, parathyroid gland does not produce enough parathyroid hormone.
Body contains too much vitamin D.
A diet that is too high in phosphorus.
Although the terms "phosphorus" and "phosphate" are sometimes used interchangeably when discussing tests.
A serum phosphorus/phosphate test actually measures the amount of inorganic phosphate in the blood.
Phosphates are essential for the synthesis of energy, the health of muscles and nerves, and the development of bones.
Although serum inorganic phosphate only represents a very small portion of the body's total phosphorus, it is easily quantifiable and provides information on the body's phosphorus reserves.
Phosphate is mostly found in the body in an organic form as a compound with lipids, proteins, and carbohydrates.