Thread-like structures in nucleus (humans: 23 pairs)
Introduction to Biology Definition: Biology is the study of living organisms and their interactions with the environment. biology o level 5090 notes
– Always expressed if present Recessive allele (t) – Only expressed if two copies present Tt) Phenotype – Physical appearance (e.g.
Energy lost at each level (heat, movement, waste) – so fewer top predators biology o level 5090 notes
Producer → primary consumer → secondary consumer → tertiary consumer Example: Grass → rabbit → fox
– Genetic makeup (e.g., Tt) Phenotype – Physical appearance (e.g., tall)
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