Explanation

The medulla or the midbrain is responsible for important bodily functions such as heartbeat and breathing,

It is also responsible for hand-eye coordination and depth perception.

Explanation

Potassium (K, atomic number 19) has 19 electrons.

Its configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹, which is [Ar] 4s¹ in shorthand.

Explanation

The diameter of an atom is in the order of 0.2 nanometers (nm), or 200 picometers (pm), which is equivalent to 2 x 10^-10 meters.

Explanation

Small intestine is the primary site for nutrient absorption into the bloodstream.

It contains villi and microvilli, which increase the surface area for efficient absorption of digested food.

Explanation

The direction of energy flow in an ecosystem is unidirectional, moving through various trophic levels successively.

It begins with the input of solar energy, which is captured by primary producers, such as plants, through photosynthesis.

Explanation

Osmosis is the movement of water molecules through a semipermeable membrane from an area of higher water concentration to lower concentration.

It is a vital process in biological systems for maintaining cell balance.

Explanation

Bacillus refers to rod-shaped bacteria.

Coccus are spherical.

Spirillum are spiral-shaped.

Explanation

- The elementary charge on a single electron is -1.6 × 10⁻¹⁹ coulombs.

- It’s a fundamental physical constant.

Explanation

• The largest animal in the world is the blue whale (Balaenoptera musculus
• Reach lengths of up to 100 feet (30.5m) long
• Weight  200 tons
• Blue whale belongs to a group of mammals
• The blue whale also has a heart that has four chamber
• The heart of a blue whale weighs around 900kg.

 Last updated 12 april 2026

Explanation

The link reaction (pyruvate to acetyl-CoA), Kreb's cycle (citric acid cycle), and the electron transport chain all occur in the mitochondria.