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In 1037 CE, al-Biruni published his theory that a large landmass existed west of Europe and east of Asia.✔️
Al-Biruni, who studied Earth’s physical features, published a theory about a large landmass.
Al-Biruni was an Iranian scholar who studied Earth’s physical features.
An Iranian scholar who studied Earth’s physical features, al-Biruni theorized that a large landmass existed west of Europe and east of Asia.

Correct Answer Logic:

Option A is the only choice that includes the specific date '1037 CE' as requested.

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Agronomy QUESTION #2078

Question 1747

ALS (acetolactate synthase) inhibitor herbicides, which include sulfonylureas, imidazolinones, and triazolopyrimidines, control weeds by:

Disrupting cell membrane integrity causing rapid desiccation
Inhibiting the first enzyme in branched-chain amino acid (valine, leucine, isoleucine) biosynthesis, arresting cell division in meristematic tissue — used at very low doses (grams per hectare) due to high enzyme affinity✔️
Blocking photosystem II electron transport causing photo-oxidative damage
Mimicking auxin hormones at supra-optimal concentrations causing uncontrolled growth and plant death

Correct Answer Logic:

ALS inhibitors block acetolactate synthase, preventing synthesis of branched-chain amino acids. Cell division in apical meristems ceases within days. They are active at extremely low doses (5–75 g a.i./ha for sulfonylureas) because of high target affinity. ALS mutation is the most common mechanism of herbicide resistance worldwide due to the single amino acid substitutions that confer resistance.

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Islamic Studies QUESTION #660

Question 1748

The Great Mosque of Cordoba was built by:

Abdur Rehman I✔️
Al-Walid I
Harun al-Rashid
None of these

Correct Answer Logic:

Abdur Rehman I founded the mosque after establishing the Umayyad Emirate in Spain.

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English QUESTION #2687

Question 1749

Identify the correct modal for 'prohibition': 'You ___ park your car in front of the gate.'

could not
must not✔️
may not
need not

Correct Answer Logic:

'Must not' is used to express a strong prohibition or rule.

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Biology QUESTION #4248

Question 1750

This given organelle is involved in the synthesis of oil, phospholipids and steroids:

Mitochondria
Golgi complex
Endoplasmic reticulum✔️
Ribosomes

Correct Answer Logic:

ER synthesizes lipids including oils, phospholipids and steroids.

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City and Regional Planning QUESTION #4950

Question 1751

Which urban form is most energy-efficient?

Linear city
Scattered development
Compact city✔️
Ribbon development

Correct Answer Logic:

Compact cities are most energy-efficient due to reduced transportation needs, shared infrastructure, efficient heating/cooling of attached buildings, and preserved agricultural/natural lands.

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Physics QUESTION #4406

Question 1752

An incompressible fluid flows through a pipe that becomes narrower in one section. The fluid speed increases in that region to maintain:

Constant pressure
Constant energy
Constant mass flow rate✔️
Constant volume

Correct Answer Logic:

By the equation of continuity: $A_1v_1 = A_2v_2$. For an incompressible fluid, the volume flow rate (and hence mass flow rate) must remain constant. When area decreases, velocity increases to maintain $\dot{m} = \rho Av = $ constant.

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Mechanical Engineering QUESTION #2397

Question 1753

The hydrostatic pressure $p$ at depth $h$ below a free surface in a fluid of specific weight $\gamma$ is:

$p = \gamma / h$
$p = \gamma h$✔️
$p = \rho h$
$p = h / \gamma$

Correct Answer Logic:

Hydrostatic pressure: $p=\gamma h=\rho g h$ where $\gamma$ (N/m³) is specific weight, $h$ is depth below the free surface.

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English QUESTION #2719

Question 1754

Which word is spelled correctly?

Separate✔️
Seperate
Saparate
Seperat

Correct Answer Logic:

A common mistake is using 'e' instead of 'a' in the middle of 'separate'.

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Economics QUESTION #1694

Question 1755

Among the following, which one is categorically NOT a component of Gross Domestic Product (GDP) calculated by the expenditure approach?

Consumption expenditure by households
Gross private domestic investment by firms
Government purchases of goods and services
The prevailing rate of unemployment✔️

Correct Answer Logic:

The expenditure approach to GDP is: $\text{GDP} = C + I + G + (X - M)$, where $C$ = household consumption, $I$ = gross private investment, $G$ = government purchases, and $(X-M)$ = net exports. The rate of unemployment is a labour market indicator and is not a component of GDP. It may be correlated with GDP (via Okun's Law) but is not included in its calculation.

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Islamic Studies QUESTION #629

Question 1756

To which companion did the Prophet (ﷺ) give the title "Zunnurain"?

Hazrat Abu Bakr
Hazrat Umar
Hazrat Usman✔️
Hazrat Ali

Correct Answer Logic:

Hazrat Usman (رضي الله عنه) was called "Zunnurain" because he married two daughters of the Prophet (ﷺ).

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MCQs Section QUESTION #4900

Question 1757

A letter by Mark Twain _____ reveals that Twain provided financial assistance to one of the first Black students at Yale Law School.

written in the same year as The Adventures of Huckleberry Finn were published
written in the same year of publication as The Adventures of Huckleberry Finn
written in the same year that The Adventures of Huckleberry Finn was published✔️
Mark Twain wrote a letter in the same year as he published The Adventures of Huckleberry Finn that

Correct Answer Logic:

The Adventures of Huckleberry Finn is a singular title so the verb must be 'was published,' not 'were published.' Option A uses 'were' incorrectly. Option B is ambiguous. Option D creates a misplaced modifier where 'that' could refer to either the letter or Huckleberry Finn.

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Biology Zoology Botany QUESTION #1354

Question 1758

The cell wall of fungi is primarily composed of:

Cellulose
Chitin✔️
Pectin
Lignin

Correct Answer Logic:

The cell wall of fungi is primarily composed of chitin — a nitrogen-containing polysaccharide made of N-acetylglucosamine units linked by β-1,4-glycosidic bonds. This is a key distinguishing feature of fungi from plants (whose cell walls contain cellulose). Chitin provides structural strength and rigidity to the fungal cell wall.

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Mathematics QUESTION #4133

Question 1759

What is the area enclosed by the polar curve $r = 2\cos(\theta)$?

$\pi$✔️
$2\pi$
$4\pi$
$\frac{\pi}{2}$

Correct Answer Logic:

Circle with radius $1$ has area $\pi(1)^2 = \pi$. Or by integration: $A = \frac{1}{2} \int_{-\pi/2}^{\pi/2} (2\cos(\theta))^2 d\theta = 2\int_{-\pi/2}^{\pi/2} \cos^2(\theta) d\theta = \pi$.

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English QUESTION #2716

Question 1760

Identify the correctly spelled word:

Receive✔️
Recieve
Receve
Riceive

Correct Answer Logic:

The rule is 'i before e except after c'.

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