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Grade 10 Science — Quarter 3: Biology & Nervous System

Grade 10 Science Q3: body coordination, heredity, evolution, and ecosystems.

DepEd MELC reviewer for Grade 10 Science, Quarter 3. Master the concepts, tables, and common-mistake warnings below.

1

Coordinated Body Systems

The nervous and endocrine systems coordinate body functions. Neurons transmit signals; hormones regulate via feedback mechanisms.

2

Heredity: DNA and Genes

DNA carries the genetic code. Genes direct protein synthesis (transcription → translation). Mutations change the code.

3

Evolution and Biodiversity

Natural selection: organisms with favorable traits survive and reproduce. Biodiversity results from millions of years of evolution.

💡 Exam Hack

Natural selection = "survival of the fittest" — the best-adapted, not the strongest, survive to pass on traits.

4

Neuron Signal

Stimulus → receptor → sensory neuron → brain/spinal cord → motor neuron → effector
💡 Exam Hack

A reflex skips the brain — it goes through the spinal cord for a faster response.

📌 Quick Recap — Master These

Before your test, make sure you can confidently do each of the following:

  • Explain and apply Coordinated Body Systems.
  • Explain and apply Heredity: DNA and Genes.
  • Explain and apply Evolution and Biodiversity.
  • Explain and apply Neuron Signal.

Re-read any section above where you hesitate, then try the worked example again without looking.