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pishuonlain [190]
3 years ago
14

A student's grade goes from a 95 to a 65 in 3 weeks. Calculate

Biology
1 answer:
steposvetlana [31]3 years ago
5 0

-10grade/week

Explanation:

Given parameters:

Initial grade = 95grade

Final grade = 65grade

Time = 3weeks

Unknown parameter:

Rate of change of grade = ?

Solution:

Rate is defined as the change of a quantity with time.

 Rate of change of grade  = \frac{Final grade - Initial grade}{Time}

Rate of change of grade  = \frac{65 - 95}{3} = \frac{-30}{3}

Rate of change of grade = -10grade/week

The rate of change of the student's grade is -10grade/week. It implies that the grade of the student reduces by 10unit per week.

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What are the nitrates is used to make?
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Looking through a light microscope at a dividing cell, you see two separate groups of chromosomes on opposite ends of the cell.
vladimir2022 [97]

Answer:

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Hence, option D is correct

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3 years ago
The picture represents gas exchange in the alveoli. Observe what is happening at location X.
aivan3 [116]

A

CO₂ is the waste product of respiration of cells. Oxygen, on the other hand, is required in cellular respiration. Therefore at the alveolar in the lungs of an organism, CO₂ will be expelled while O₂ will be taken in.

Explanation:

This occurs passively due to the diffusion gradient, CO₂ usually has a higher concentration in the blood and lower concentration in alveoli hence this gas diffuses from the bloodstream into the lungs. On the other hand, oxygen is higher in concentration in the alveoli than in the blood capillaries hence difuses into the blood and taken to the cell for respiration. The CO₂ in the lungs is then expelled through exhalation of the lungs.

Learn More:

For more on gaseous exchange in the lungs check out;

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