1
a) In the dark a plant uses up
b) In the light a pond snail produces
carbon dioxide glucose nitrogen oxygen
c) Once the products of digestion have been absorbed, the waste materials remaining in the gut are
egested excreted ingested secreted
d) Spiders are included in the arthropods because they have
eight legs jointed limbs no wings two parts to the body
e) The producer in this food chain: oak leaf --> caterpillar --> robin --> sparrow-hawk, is the
caterpillar oak leaf robin sparrow-hawk
f) The arrows in a food chain show
how much the organisms eat the decrease in numbers of organisms
the speed of the food chain where energy goes
g) Fertilisation in flowering plants happens when the
nuclei in the ovule and pollen fuse pollen lands on the stigma
pollen sends a tube down the style pollen tube enters the ovule
h) Enzymes in the gut convert insoluble substances into
glucose large molecules soluble substances starch
i) Fibre in the diet is useful because it
comes from plants helps to make us strong
keeps the bowels healthy provides energy
j) Respiration is the
exchange of gases in the lungs reaction between oxygen and food in the cells
removal of carbon dioxide by the blood from the tissues
transport of oxygen by the blood to all the cells of the body
2. The following instructions are given to chefs in restaurants and hotels. Give a reason for each one.
(a) Food should not be left uncovered in the kitchen.
(b) Wash your hands thoroughly after using the toilet.
(c) Chicken should be cooked thoroughly before it is eaten.
(d) Do not smoke cigarettes in the kitchen.
(e) Meat should be chopped up on a different board from vegetables.