Biology 5090/22 — October/November 2021
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
Topics Organisms and Their Environment · Plant Nutrition · Respiration · Enzymes · Sexual Reproduction in Plants · Transport in Humans · +6 more
The diagram shows a photomicrograph of the lower surface of a leaf.
Name each of the parts labelled A to C.
cell A = ______
cell B = ______
pore C = ______
In an area affected by air pollution, the surface of the leaf becomes covered with particles.
These particles reduce the amount of light entering the leaf and may block all pores of the type labelled C.
Explain how this will affect the production of starch by the plant.
A species of caterpillar, the holly looper, feeds on the leaves of the holly plant.
Holly plants produce red berries that are eaten by a species of bird, the song thrush.
Song thrushes also eat caterpillars and are eaten by hawks.
Use the information above to:
- Complete the food web below by writing the name of one species in each box.
- Draw arrows between the boxes to show the direction of energy flow between organisms.
State, for the food web above, the number of:
species that are producers = ______
species that are consumers = ______
trophic levels = ______
The rest of this paper
8 more questions- Q2Transport in Humans · Respiration · Enzymes9M
- Q3Human Nutrition9M
- Q4Sexual Reproduction in Humans9M
- Q5Enzymes · Biotechnology and Genetic Modification · Organisms and Their Environment11M
- Q6Sexual Reproduction in Plants10M
- Q7Organisms and Their Environment10M
- Q8Disease and Immunity10M
- Q9Respiration · Sexual Reproduction in Plants · Transport in Flowering Plants · Plant Nutrition · Movement Into and Out of Cells10M