Lesson 7.3 · Unit 7, Block 3
31 questions on this block. Tap an answer and it moves on by itself — correct answers advance immediately, misses hold a few seconds so you can read why.
Part 1FertilizationPart 2The loop: 46 → 23 → 46Part 3Three sources of variationPart 4Sexual and asexualPart 5Know it to reject it