Explanation

 Sir William Ramsay, a Scottish chemist, is credited with the discovery of the noble gases.

He first discovered argon and later found neon, krypton, and xenon. 

Explanation

 You must comply with the teacher’s advice.

آپ کو استاد کے مشورے پر عمل کرنا چاہیے۔

The correct preposition after "comply" is "with".

 It's used in contexts where you are required to abide by a rule, instruction, or request.

Explanation

We use the simple present tense: An apple falls down.

Falls is the present tense of the verb "fall," indicating the action of the apple descending to the ground.

Explanation

 The main plant body of Hepaticopsida (Liverworts) is the gametophyte.

This gametophyte can be either thalloid (a flat, often lobed, body) or foliose (having leaf-like structures). 

Explanation

Elements of Group IVA (Group 14) like carbon (C) and silicon (Si) have very high melting points due to strong covalent bonding.

For example, diamond (carbon) has the highest melting point among all elements.

Explanation

The fine ruling (track spacing) on a CD is about 0.5 micrometers (µm).

This microscopic spacing allows the CD to store large amounts of data through optical encoding.

Explanation

1. Descriptive Statistics:

• Deals with summarizing and presenting data (e.g., charts, averages).

2. Inferential Statistics:

• Involves making predictions or inferences about a population based on a sample.

Explanation

Electric Flux Maximum (Φ = E·A·cosθ)  

   - When the area vector is perpendicular to the electric field, θ = 0°, so cosθ = 1.  

   - Therefore, Φ = EA (maximum possible flux). 

Explanation

Glass, iron, plastic, and paper are typically considered non-recyclable domestic waste;

They are generally accepted for recycling in most communities

Explanation

 The penetration of a virus into a host cell is facilitated by sugars on the viral surface interacting with specific receptors on the host cell membrane, allowing the virus to attach and enter the cell.