Explanation

• The length of the Indus River is 3,180 km.
• The largest river in Pakistan is the Indus River.
• It is the National River of Pakistan.

Additional information:

• The Indus River starts in Tibet.
• It originates from the Mansarovar lake.
• They flow through India, Pakistan.
• It finally falls into the Arabian Sea near Karachi.
• They start making a delta near the city of Thatta.
• The old name of the Indus River was Sindhu.
• There are 6 Barrages constructed in the Indus River.
• The 2nd source of Indus River is Gar Tsangpo.
• The upper Indus Plain starts from Kalabagh.
• The upper Indus Plain ends at Mithankot.

Last updated by NA on 06-11-2026

Explanation

• Student-centred learning focuses on students' needs, interests and abilities.
• Students participate actively in discussions and learning activities.
• The teacher facilitates learning rather than simply delivering information.

Last verified on 06-11-2026

Explanation

• Heuristics are mental shortcuts or practical rules of thumb used to solve problems and make decisions.
• They are based on experience, intuition, and common sense.
• Heuristics help people find quick and satisfactory solutions without examining every possible option.
• They save time and effort but may sometimes lead to errors or biased judgments.

Last verified on 06-11-2026

Explanation

• Red-green colour blindness is usually an X-linked recessive trait.
• The father passes his affected X chromosome to all daughters and his Y chromosome to all sons.
• A non-carrier mother passes a normal X chromosome to every child, so all children will have normal vision. All daughters will be carriers.

Last verified on 06-11-2026

Explanation

• In codominance, both alleles express themselves equally in the heterozygous condition.
• Neither allele completely masks the other.
• The AB blood group in humans is a classic example.

Last verified on 06-11-2026

Explanation

• Epistasis occurs when the expression of one gene is affected by another gene at a different locus.
• This interaction can mask or modify the effects of the other gene, leading to variations in phenotypes.

Last verified on 06-11-2026

Explanation

1. P is the daughter of R → R is parent of P

2. N is the brother of P → N and P are siblings. So N is also child of R

3. R is the wife of S → S is father of P and N

4. S is the father of T → T is also child of S

So S is father of N, P, and T.  

That means N and T are siblings.

Answer: Brother

Last verified on 21-08-2026

Explanation

• The signed area under a velocity-time graph gives displacement.
• Area above the time axis is positive, while area below it is negative.
• The total distance travelled is obtained by adding the absolute areas.

Last verified on 06-11-2026

Explanation

• The slope of a distance-time graph represents the speed of an object.
• Speed is calculated by dividing the change in distance by the change in time.
• A steeper slope indicates greater speed, while a horizontal line indicates that the object is at rest.

Last verified on 31-10-2026

Explanation

• A species is defined as a group of organisms that can mate and produce fertile offspring.
• Organisms in different genera generally cannot produce fertile offspring.

Last verified on 06-11-2026