Q 01/05

Which country, spanning eleven time zones and bordering fourteen others, is the largest on Earth?

A) Canada

B) Russia

C) China

D) Brazil

Answer · why

B) Russia

Russia is the largest country on Earth yet only the ninth most populous, with just over 140 million people.

Q 02/05

Which organ, the heaviest inside the human body, produces bile and stores around 100 g of glycogen?

A) Pancreas

B) Kidney

C) Liver

D) Stomach

Answer · why

C) Liver

The liver is the only human internal organ that regenerates naturally: as little as 25% of it can regrow into a whole liver.

Q 03/05

Which organelle, the site of aerobic respiration, has its own DNA, inherited only from the mother?

A) Ribosome

B) Mitochondrion

C) Nucleus

D) Golgi apparatus

Answer · why

B) Mitochondrion

The mitochondrion has a genome like a bacterium's, supporting the theory that it began as a free-living microbe engulfed by an early cell.

Q 04/05

Which 1803 deal with Napoleon's France nearly doubled the size of the United States for $15 million?

A) Louisiana Purchase

B) Gadsden Purchase

C) Transcontinental Treaty

D) Oregon Treaty

Answer · why

A) Louisiana Purchase

The Louisiana Purchase worked out at less than three cents an acre, and Napoleon sold because war with Britain was imminent.

Q 05/05

Which planet, the largest in the solar system, hosts the Great Red Spot, a storm tracked since the 1800s?

A) Saturn

B) Neptune

C) Mars

D) Jupiter

Answer · why

D) Jupiter

Jupiter's Great Red Spot has been observed continuously since 1878 and whips up winds of nearly 500 km/h.