Where is the IB Biology HL Paper 1 May 2021 mark scheme?

Clear a timed slot and sit Paper 1 without the mark scheme.
Open the mark scheme only after you have finished, and mark exactly what you wrote.
List the marks you dropped, then take another Biology Paper 1 from the sessions below.
Get a response marked against the IB criteria when you want a second reading.

Frequently asked questions

Where is the IB Biology HL Paper 1 May 2021 mark scheme?: It is on this page, next to the question paper. Choose Mark scheme, or Both, then mark your own answers against it.
Which timezone is the May 2021 Biology Paper 1?: Timezone 2. IB sets more than one paper in a session so candidates in different parts of the world do not sit the same questions.
How should I revise with this Biology paper?: Sit Paper 1 under timed conditions before you open the mark scheme. Record every mark you dropped, then take the next sitting of the same paper.