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Life Science & Ecosystems

Grade 5 · On-level practice · 8 questions · Version PG-1BMHU5D-W9H5

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1.Explain “symbiosis” in your own words.
2.Explain “natural selection” in your own words.
3.Explain “homeostasis” in your own words.
4.Explain “carrying capacity” in your own words.
5.Explain “pollination” in your own words.
6.Explain “photosynthesis” in your own words.
7.Explain “biodiversity” in your own words.
8.Explain “food web” in your own words.

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 6
  1. Explain “symbiosis” in your own words.a close relationship between different species
  2. Explain “natural selection” in your own words.the process in which helpful inherited traits become more common
  3. Explain “homeostasis” in your own words.maintenance of stable internal conditions
  4. Explain “carrying capacity” in your own words.the largest population an environment can support
  5. Explain “pollination” in your own words.the transfer of pollen that helps plants reproduce
  6. Explain “photosynthesis” in your own words.the process plants use to make sugar from light, water, and carbon dioxide
  7. Explain “biodiversity” in your own words.the variety of living things in an area
  8. Explain “food web” in your own words.connected food chains in an ecosystem

Worked example

Connect structures and behaviors to survival, growth, reproduction, and energy flow.

Common mistake

Describing a trait without explaining its function.

Helpful hint

Ask how the feature affects survival or reproduction.