Tag: science & technology

Butterflies have taste receptors on their feet. When they land on a plant, they can taste it to determine if it's a good food source. Their antennae are primarily for smelling, and their mouthparts form a proboscis for drinking nectar.

The common pigeon found in cities is scientifically known as the Rock Dove (Columba livia). While 'dove' and 'pigeon' are often used interchangeably in common language, Rock Dove is their specific species name.

Emus are native to Australia and are found across most of the Australian mainland. They are Australia's largest bird and are not naturally found in New Zealand, Chile, or Argentina.

Before genetic studies confirmed giant pandas are bears, they were classified in the raccoon family (Procyonidae) due to shared physical traits like the false thumb and similar skull structure.

Giraffes are the tallest animals on Earth, reaching heights up to 5.5 meters (18 feet). Their long necks allow them to browse leaves from tall trees, especially acacia trees on African savannas.

Cold-blooded (ectothermic) animals like reptiles cannot generate their own body heat internally. They rely on external heat sources like the sun to warm their bodies and become active.

Bush Babies (galagos) are small nocturnal primimates native to Africa, known for their exceptionally large eyes adapted for night vision. They are not whales, mongooses, or bonobos.

Lithium has the lowest atomic mass (6.94 u) among all metals, making it the lightest metal in the periodic table. Sodium (23 u) and potassium (39 u) are alkali metals like lithium but much heavier, while calcium (40 u) and magnesium (24 u) are alkaline earth metals with significantly higher atomic masses.

A fuse wire must have a low melting point so it melts and breaks the circuit when excessive current flows, protecting appliances from damage. High conductivity (opposite of option D) is actually needed to allow normal current flow, while high or moderate melting points would prevent the fuse from functioning as a safety device.

Nicolaus Copernicus formulated the heliocentric model in the 16th century, proposing that the Sun is the center of the solar system. While ancient Indian astronomer Aryabhatta had earlier described a similar model, Copernicus was the first in modern European astronomy to systematically argue for heliocentrism. Note: Option A has a typo - should be 'Galileo'.