School Based Assessment Science Grade 8 Unit 3

Variations, Heredity and Cell Division

Here are assessments about the topics variations, Heredity and Cell Division, the chapter #3 Grade 8 PCTB syllabus.

Before going to attempt practice School Based Assessments Science Grade 8, read the chapter no. 3 Science grade 8.

Heredity & Variation

Heredity transfers traits (e.g., eye color) from parents to offspring via genes. Variation refers to differences among individuals of a species, caused by genetic mutations or environmental factors. Adaptations (e.g., camel humps, cactus spines) help organisms survive in their environment.

DNA & Cell Division

DNA—a double helix of nucleotides (A-T, C-G)—stores genetic instructions on chromosomes. Mitosis produces identical body cells for growth/repair. Meiosis creates gametes (sperm/egg) with half the chromosomes, ensuring genetic diversity in offspring. The zygote (fertilized egg) develops into a new organism.

Assessment #1 Unit #3 Science Grade 8: Variations, Heredity and Cell Division

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