Explanation

The medical condition characterized by the complete absence of sperm in the semen is called azoospermia. 

Explanation

The woman is Raj's mother

The grandfather's only son is the woman's father.

The woman's father's only son would be her brother or possibly herself if she is also the son in question, but the riddle states that the only son is also Raj's son in this riddle.

The woman's father is the grandfather's only son.

The woman's father's son is the woman's brother, and she is the sister of the woman.

Explanation

Scurvy

Cause: Vitamin C (ascorbic acid) deficiency. 

Symptoms: Fatigue, weak and sore limbs, bleeding gums, easy bruising, delayed wound healing, and anemia. 

Other Vitamin Deficiencies 

Rickets: Caused by a deficiency in Vitamin D.

Beriberi: Caused by a deficiency in Vitamin B1 (Thiamine).

Night Blindness: Caused by a deficiency in Vitamin A.

Explanation

Explanation

Hypertension (high blood pressure) is a non-viral disease.

Whereas HIV/Aids, Measles, and Influenza are all viral diseases.

Explanation

The maximum value (or peak value) of the sinusoidal current is 14.14 A.

This is found by using the relationship for a sinusoidal wave, where the peak value is the RMS value multiplied by the square root of 2 (approximately 1.414).  

Calculation 

Identify the given information: The RMS value of the current is 10 A.

State the relationship: For a sinusoidal waveform, the relationship between the peak value (I_peak) and the RMS value (I_rms) is:

I_peak = I_rms × √2 

Substitute and solve:

I_peak = 10 A × √2 I_peak = 10 A × 1.414 I_peak ≈ 14.14 A 

Explanation

Communicable diseases are those that can be spread from person to person.

Tuberculosis (TB) is a bacterial infection that can be transmitted through the air when an infected person coughs or sneezes

This makes it a communicable disease. 

Diabetes:

Diabetes is a metabolic disorder that is not spreadable from person to person. 

Hypertension:

High blood pressure (hypertension) is a cardiovascular condition that is also not communicable. 

Asthma:

Asthma is a chronic respiratory condition characterized by inflammation and narrowing of the airways. 

Explanation

The nephron is the microscopic structural and functional unit of the kidney

There are almost 1000000 of nephrons in each kidney in the human body

How it Works 

Filtration:

Blood enters the glomerulus, where its smaller components are filtered into the Bowman's capsule.

Reabsorption:

As the filtered fluid moves through the renal tubule, essential substances (water, minerals, nutrients) are reabsorbed into the bloodstream.

Waste Concentration:

The remaining fluid, now concentrated with wastes and excess water, becomes urine.

Explanation

Nephrons are the microscopic, structural, and functional units of the kidneys.

They are responsible for filtering waste products from the blood to produce urine,

This helps to regulate the body's fluid and electrolyte balance and maintain homeostasis. 

Explanation

 Active voice sentence:

"They have finished the homework."

Step 1:

Identify tense

"have finished" = Present Perfect Tense

Step 2:

Passive voice structure for Present Perfect

Object + has/have been + past participle + by + subject

Object + has/have been + past participle + by + subject

Step 3: Apply the rule

Object = "the homework"

Verb = "has been finished"

Subject = "by them"

So, the correct passive sentence is:

"The homework has been finished by them."