Explanation

Cartilaginous rings in the respiratory tract, like those in the trachea and bronchi, serve multiple functions: 

Support:

The rings provide structural support to the airways.

They keep the trachea and bronchi open and stable. 

Keep the passage open:

This is directly related to the support function.

Prevent collapsing:

The rings are crucial in preventing the collapse of the airways, especially during exhalation when pressure changes occur. 

Explanation

A photon is a boson, which is a particle with an integer spin that transmits electromagnetic force. 

Proton: Protons are fermions, which have a half-integer spin. 

Neutrino: Neutrinos are also fermions. 

Pion: While considered a meson, pions are composite particles made of quarks and antiquarks and are classified as bosons. 

Explanation

Lithosere succession takes place on bare rocks. 

 "Litho" refers to "rock,"

So lithosere specifically describes the process of ecological succession that begins on exposed rock surfaces

Explanation

 The last structure that urine passes through before exiting the body is the urethra. 

Explanation

 There are two isomers possible for the molecular formula C₂H₆O: ethanol (also known as ethyl alcohol) and dimethyl ether.

These two molecules have the same number of carbon, hydrogen, and oxygen atoms

However, their atoms are arranged differently, resulting in distinct properties

Explanation

Sticky ends are formed when a restriction enzyme cuts DNA at specific locations, leaving short, single-stranded overhangs with unpaired bases at the ends.

These unpaired bases can then form hydrogen bonds with complementary unpaired bases on another DNA fragment, allowing them to "stick" together, hence the name "sticky ends". 

Explanation

A gas being cooled is a system where entropy is decreasing. 

When a gas is cooled, its molecules slow down and become more ordered, leading to a decrease in entropy. 

Explanation

The signal from a remote control to the device operated by it travels at the speed of Light. 

Explanation

The most important hormone in initiating and maintaining lactation after birth is prolactin. 

Prolactin is the hormone responsible for stimulating milk production in the breasts. 

Explanation

Ferromagnetic materials are those that can retain their magnetization even after an external magnetic field is removed.

They are strongly attracted to magnets. Iron, nickel, and cobalt are all ferromagnetic materials.

Barium, on the other hand, is not ferromagnetic

It is classified as a diamagnetic material, meaning it weakly repels magnetic fields.