Explanation

The correct phrase is "deaf to", meaning to ignore or not listen to something.

So the sentence becomes: "He remained deaf to his father's advice."

Explanation

 A rotary kiln used in waste treatment (like incineration or cement production) typically has four zones:

   - Drying zone

   - Preheating zone

   - Combustion zone

   - Cooling zone

Explanation

The optimal pH for most arginases is in the alkaline range, with values typically between 9.0 and 10.0, though variations exist depending on the source and specific arginase isoform.

Arginase is an enzyme with an optimal pH around 9.7, where it functions best to convert arginine into urea and ornithine in the urea cycle.

Explanation

 In cyclic photophosphorylation, electrons from the primary acceptor of Photosystem I (PSI) return to the cytochrome complex, specifically the cytochrome b6f complex, via ferredoxin (Fd)

.This process also involves plastoquinone (PQ) and plastocyanin (Pc) before the electrons return to PSI. 

Explanation

Robert Brown discovered Nucleus in: 1831

Explanation

In a metallic conductor, current flows due to the movement of free electrons in the conduction band.

These electrons drift under the influence of an electric field, creating electric current.

Explanation

Of the elements listed, aluminum is the one that most commonly exhibits a +3 oxidation state.

Sodium typically shows a +1 oxidation state, and magnesium typically shows a +2 oxidation state.

While iron can exist in a +3 oxidation state (as in iron(III) chloride),

It also commonly exists in a +2 oxidation state (as in iron(II) sulfate), making it a transition metal with variable oxidation states. 

Explanation

Animals that lay eggs are called oviparous.

This term distinguishes them from animals that give birth to live young, which are called viviparous. 

Explanation

Affluent  دولت مند, متمول

Wealthy دولت مند

Explanation

To find the median, first arrange the data in order:

5, 6, 12, 13, 15, 18, 22, 50

Since there are an even number of values, the median is the average of the two middle values:

Median = (13 + 15)/2 = 28/2 = 14