Explanation

Van der Waals forces are the weakest type of intermolecular force because they arise from temporary fluctuations in electron distribution, leading to very weak, temporary dipole-dipole interactions. 

Explanation

 Most ciliates exchange genetic material through a process called conjugation.

This process involves the temporary union of two ciliates, during which they exchange genetic material, specifically from their micronuclei. This exchange is a form of sexual reproduction that leads to genetic recombination and diversification within the population. 

Explanation

Explanation

The organism found in the gut of termites that helps them digest wood is a protozoan called Trichonympha

These protists break down cellulose in wood, allowing termites to digest it effectively. 

Explanation

The role of the court acrobat was intended to entertain and bring joy, especially to the king.

The idea behind creating this position was to provide amusement and lighten the mood at court.

Explanation

Mr. Chips is not formally given the title of "Headmaster" upon retirement;

He remains a teacher at Brookfield School.

He does become Acting Headmaster during periods when the official headmaster is unavailable. 

Explanation

In the story, Mananas is the character chosen for the role of court acrobat, despite opposition.

Explanation

The correct phrase is "She walked in without knocking".

"Without" indicates the absence of the action of knocking. 

Explanation

In the context of many science fiction or literary stories (especially those involving alien ships or mysterious landings),

Spelding is often the character who goes to look at the ship—usually out of curiosity or duty.

Explanation

 In "The Man Who Kept His Heart in a Bucket" by Sonia Levitin (which this question likely references),

Gorgios proposes creating the unusual post of court acrobat, and many people oppose the idea, considering it odd or unnecessary.