Contents 1. Basic Recall...
B2: Cells & Control
Cells (B2a-d).
Control (B2e-f)
2.
C3: Atomic structure
C4: Periodic Table
Diagrams
B2: Cells & Control
C3: Atomic Structure..
C4: Periodic Table
3. Practice Questions...
B2: Cells & Control
C3 & C4: Atomic Structure & Periodic Table
B2, C3, C4 to help. this is science ​

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium