Explanation

Ancient Greek medicine believed that health depended on the balance of four bodily fluids or "humors": blood, phlegm, black bile, and yellow bile.

Imbalance in these humors was thought to cause disease.

Explanation

Benjamin Bloom introduced the concept of Levels of Abstraction in his Bloom's Taxonomy, classifying learning objectives from simple to complex.

These levels include: Knowledge, Comprehension, Application, Analysis, Synthesis, and Evaluation—each representing deeper cognitive processing.

Explanation

Let the younger sister's present age be x.

Fareeha's present age = x + 4

After 10 years:

Younger sister's age = x + 10

Fareeha's age = x + 4 + 10 = x + 14

Given:

x + 10 + x + 14 = 48

2x + 24 = 48

2x = 24

x = 12

Fareeha's present age = x + 4

= 12 + 4

= 16 years

Explanation

Given:

Cost Price (CP) = Rs. 1500

Selling Price (SP) = Rs. 2550

Profit = SP - CP

= 2550 - 1500

= 1050

Percentage Profit = Profit/CP × 100

= 1050/1500 × 100

= 0.7 × 100

= 70%

Explanation

Urdu is written in the Persian-Arabic script, which was disliked by Hindus, who favored Devanagari (Hindi) script.

This script-based difference became a major cultural and political divide during British India.

Explanation

The Bay of Biscay is located in Western Europe.

It is bordered by France to the north and Spain to the south.

It is part of the Atlantic Ocean.

It is known for its rough waters and rich marine life.

Explanation

Given expression: 1830 + 20 × 50 - 396 ÷ 3

Following order of operations:

1. Multiplication: 20 × 50 = 1000

2. Division: 396 ÷ 3 = 132

3. Now, the expression becomes:

1830 + 1000 - 132

= 1830 + 1000 = 2830

= 2830 - 132 = 2698

Explanation

Alkali metals (like sodium and potassium) react vigorously with air and water, often catching fire.

To prevent this, they are stored in oil (like paraffin oil) to keep them stable and unreactive.

Explanation

Crossing over occurs during meiosis, where genetic material is exchanged between homologous chromosomes.

This process produces recombinant chromatids, which carry a new combination of genes.

Explanation

Polar orbiting satellites travel over the Earth from pole to pole and are mainly used for collecting weather and climate data.

They provide detailed global coverage, useful for forecasting and environmental monitoring.