Explanation

The centromere is the region where the two chromatids (sister chromatids) are attached to each other.

It serves as a constricted region that holds the chromatids together until they separate during cell division.

Explanation

Chromosomes are thread-like structures that appear during cell division, specifically during the prophase stage of mitosis or meiosis.

They are made up of condensed chromatin and carry genetic information from one generation of cells to the next.

Explanation

Centrioles are composed of 27 microtubules arranged in a specific pattern of nine triplets (9 x 3 = 27).

These microtubules are highly stable and form a rigid structure that plays a critical role in the formation of cilia, flagella, and spindle fibers during cell division.

Explanation

Facilitated diffusion is a type of passive transport that uses carrier proteins to move specific substances across the cell membrane without energy input.

This process allows cells to regulate the movement of essential molecules, like sugars and amino acids, into or out of the cell.

Explanation

Plasmolysis is the process by which a plant cell loses water and its cytoplasm shrinks, causing the cell membrane to pull away from the cell wall.

This can occur due to osmotic stress, such as when a plant is exposed to high concentrations of salt or sugar.

Explanation

Diffusion is a passive process, meaning it does not require energy input.

In diffusion, particles move from an area of higher concentration to an area of lower concentration until they are evenly distributed, without the use of energy.

Explanation

The cell membrane is also known as the plasma membrane.

It is composed of a double layer of lipids, specifically phospholipids.

Explanation

In plants, the cell wall is primarily composed of strong fibers of cellulose, a type of carbohydrate.

Cellulose is a polymer of glucose molecules that provides structural support, rigidity, and protection to the plant cell.

Explanation

Electron microscopes produce higher-resolution images due to the shorter wavelength of electrons compared to visible light.

This enables them to reveal smaller details and structures that are not visible with light microscopes.

Explanation

The magnification of a light microscope is formed by a combination of the eyepiece and objective lens.

The objective lens collects and magnifies light from the sample.

It is then further magnified by the eyepiece, producing the final magnification.