Living Things
State two characteristics of living organisms.
movement, respiration, sensitivity, growth, reproduction, excretion, nutrition)
Name two organelles and their functions.
nucleus—controls activities; mitochondria—energy release)
State the function of proteins in the body.
(Growth and repair)
Name one vector-borne disease and its vector.
(Dengue—mosquito)
Define ecosystem.
(Community of organisms and their environment)
Differentiate between plant and animal cells (2 differences).
(Cell wall, chloroplasts, vacuole size)
Discuss the importance of dietary fibre and the effects of its deficiency.
(Aids digestion, prevents constipation; deficiency leads to digestive issues)
Discuss two methods of preventing the spread of infectious diseases and explain how they work.
(Vaccination—immunity; sanitation—reduces exposure; quarantine—limits spread)
What is a food chain? Differentiate between Habitat and Niche
(Sequence showing energy transfer)
(Habitat = where it lives; niche = role/function)
A cell is placed in a concentrated salt solution and shrinks.
Explain this observation.
(Osmosis; water moves out of the cell into hypertonic solution)
What is vitamin A responsible for?
Night blindness
Explain how energy is lost at each trophic level.
(Heat loss, respiration, incomplete consumption)
Some one has Bow legs. Which vitamin are they lacking?
Vitamin D
Distinguish between food chain and food web and give an example of a food web
FREE ANSWER