The organism level of life. Types of nutrition
Answers are for parents and teachers.
1
Give three examples each of unicellular and multicellular organisms and write how each is regulated.
Unicellular: amoeba, Euglena, Chlamydomonas – humoral-chemical; multicellular: sheep, apple tree, human – neuro-humoral (animals) or phytohormones (plants).
2
Explain the relationship between autotrophs and heterotrophs using a food chain.
For example: wheat (phototroph) → mouse → snake → eagle. Autotrophs turn solar energy into organic matter; heterotrophs use that matter and energy.
3
Write four hygiene rules for protecting against parasites.
Wash hands; wash fruit and vegetables; cook meat and fish well; drink clean (boiled or filtered) water.
4
Why do animals need calcium and iron? Write one function for each.
Calcium – bones and teeth, blood clotting, muscle contraction; iron – part of haemoglobin, transporting oxygen.