Explanation

Cat is not a ruminant.

Ruminants like goats, camels, and cows have a specialized stomach with multiple chambers for digesting plant-based food.

While cats are carnivores with a simple stomach.

Explanation

An altimeter is an instrument used to measure the altitude or height of an aircraft above the ground or sea level.

• Tachometer: Measures the rotation speed of an engine, typically in revolutions per minute (RPM).
• Hydrometer: Measures the density or specific gravity of liquids, commonly used for checking the concentration of solutions.

Explanation

To convert kilometers to miles, we can use the conversion factor: 1 kilometer = 0.621371 miles

So,

1280 kilometers = 1280 x 0.621371 miles

= 795.5 miles

So, the correct answer is: 795.5 miles

Explanation

A biological species is a group of organisms

that can reproduce with one another in nature and produce fertile offspring.

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ND17-1-2023

Explanation

Birds that feed on marine food use rectal salt glands to remove excess salt from their bodies. 

These glands allow them to excrete salt while retaining water.

They enabling survival in a saline environment.

Explanation

A convex lens can focus sunlight at one point by converging the light rays.

That is why it is often used in magnifying glasses or for starting fires using sunlight.

Explanation

When water vapour in the air condenses and accumulates around a dust particle near the ground, fog is formed.

Cloud of small water droplets near ground level that is dense enough to reduce horizontal visibility to less than about 3,000 ft (1,000 m).

Fog may also refer to clouds of smoke particles (smog), ice particles, or mixtures of these components.

Explanation

Onyx, Carrara, and Calacatta are all forms of marble.

• Onyx is a type of marble that is characterized by its banded or striped pattern, typically in shades of black, white, and gray.
• Carrara marble is a type of white or blue-gray marble that is quarried in Italy and is known for its high quality and durability.
• Calacatta marble is a type of white marble that is also quarried in Italy.

Explanation

Eutrophication is the process where excessive nutrients, often from fertilizers, cause the overgrowth of plants and algae in water bodies.

As these plants decay, they deplete the oxygen, harming aquatic life.

Explanation

Heinrich Rudolf Hertz discovered electromagnetic waves in 1887, experimentally confirming James Clerk Maxwell's predictions.

Hertz demonstrated the existence of radio waves, a type of electromagnetic wave, using a simple apparatus.