science & technology Online Quiz - 113

Camels have three eyelids: two regular eyelids (upper and lower) plus a third transparent eyelid (nictitating membrane) that moves horizontally. This third eyelid protects their eyes from sand and wind while maintaining visibility in harsh desert conditions.

China hosted the 2008 Summer Olympic Games in Beijing, marking the first time China had hosted the Olympics. The opening ceremony was held on August 8, 2008 (08/08/08), chosen for its auspicious significance in Chinese culture.

Basketball is widely considered the most popular indoor spectator sport in the United States, with the NBA having high television viewership and attendance. While football has higher overall popularity, basketball dominates indoor arena sports.

Coca-Cola was originally green in color when first created in 1886, due to the ingredients used including caramel coloring from sugar and caffeine. The beverage was later changed to the familiar brown color we know today.

Gold has the highest density among the options at 19.3 g/cm³. Silver and copper are lighter metals, while alloy is a mixture rather than a pure metal with fixed density.

Butterflies are insects, and all insects have six legs by definition. This anatomical feature distinguishes them from other arthropods like spiders (8 legs).

The Arctic Ocean is the smallest ocean in the world. The Atlantic Ocean is much larger, while the Arabian Sea is not an ocean but a sea.

A rhino's horn is made of keratin, the same protein that forms human hair and fingernails. It's not bone, tusk, or any other material.

The blue whale is the largest mammal and the largest animal ever known. Elephants are the largest land mammals, while crocodiles aren't mammals at all.

Camels actually do have three eyelids for each eye, including a special transparent third eyelid called the nictitating membrane that protects their eyes from blowing desert sand.

The Arctic Ocean is the smallest and shallowest of the world's oceans. The Atlantic is the second-largest, while the Arabian is a sea, not an ocean.

Gold has the highest density at 19.3 g/cm³, making it heavier than silver (10.5 g/cm³) and copper (8.96 g/cm³). Alloy is a mixture, not a specific metal.

Butterflies, like all insects, have six legs - a defining feature of the class Insecta. This anatomical trait is consistent across all insect species.

Blue whales are the largest mammals, reaching lengths of 30 meters and weights of 200 tonnes. Crocodiles are reptiles, not mammals, so they're not even in the correct category.

The 2008 Summer Olympics were held in Beijing, China. Beijing was selected as the host city and invested heavily in infrastructure and facilities for the games. Japan has hosted the Olympics (1964 Tokyo, 2020 Tokyo), India has never hosted the Olympics, and the United States has hosted multiple times but not in 2008.

Basketball is one of the most popular indoor sports in the United States, with the NBA being a major professional league. While baseball and football are popular in the US, they are primarily outdoor sports. Carrom is not widely played in the US compared to basketball.

Rhino horns are made of keratin, the same fibrous structural protein that makes up human hair and fingernails. They are not made of actual bone, tusk, wood, or iron. This is why rhino horns can be shaped and polished like hair, and why they have no horn core like bovine horns.