When should one use the homework tag?

A point in the linked meta post says-

A question that addresses a basic biology concept that may seem trivial to biology professionals

A 'basic biology concept', there's no mention about the level.

Looking at the diverse branches of biology, a general biological knowledge should be one of high school level?

A recent question was tagged homework.

The MCQ structure of the post might have triggered the edit.

I wonder what level of knowledge is considered (very) basic by biologists here to put questions under homework.

I think there are many questions, especially about evolution posted by people with little or no biological background but are not tagged as homework.

NB: The question wasn't an assignment.

An example I was looking for.

Hey mods

et al.

This has two spam flags

I'd appreciate it if you don't decline them until they retract them

> It is know that egg cells and oocytes have much more inducing factors and maternal factors, which like Oct4,Sox 2,Klf4 and c-Myc,so if it is possible that we could use the egg cells or oocytes extracts by intravenous injection or other ways to defer senescence?

They're mistaken SmokeDetector autoflags.

Looks like a nice summer holiday experiment

I'll upvote it

What species of duck is this?

I know I'm usually pretty good at these, but this one has me stumped...

@M.A.R. why?

@theforestecologist A Donald.