PHS Edexcel Combined Science Biology Paper 2 HIGHER (sample 3)

• glucose + water

• glucose + carbon dioxide

• glycogen + water

• glucose + oxygen

State why the light intensity absorbed by the pondweed is not the same as the light intensity measured by the light meter.

• some light is reflected by the glass/test tube

• the light meter is not in the same position as the test tube

• some light will be absorbed by the glass / test tube/water

• the light meter does not work

Which row shows the name of hormone S and the endocrine gland that makes hormone S?

• hormone S is oestrogen, the endocrine gland is uterus

• hormone S is progesterone, the endocrine gland is ovary

• hormone S is oestrogen, the endocrine gland is ovary

• hormone S is progesterone, the endocrine gland is uterus

State which day an egg is most likely to be released from the ovary.

• 5

• 14

• 28

• 0

The hormone is used in clomifene therapy to help infertile women conceive. Explain why FSH is used in clomifene therapy.

• FSH causes eggs to develop in the follicle, the more eggs that develop the more likely a woman is to conceive.

• FSH causes eggs to be released more often so the woman is more likely to conceive.

Select two abiotic factors.

• light

• pH

• predator

• prey

Describe the trend shown in this graph.

• as the distance from the trees increases the number of daisy plants in the sample increases, the number of daisy plants in each sample does not go up linearly from distance 2.5m

• as the distance from the trees decreases the number of daisy plants in the sample increases, the number of daisy plants in each sample does not go up linearly from distance 2.5m

• as the distance from the trees increases the number of daisy plants in the sample decreases, the number of daisy plants in each sample does not go up linearly from distance 2.5m

Explain the effect of the woodland on the distribution of poppy plants.

• The number of poppy plants near woodland decreases because the trees block light and light is needed for photosynthesis.

• The number of poppy plants near the woodland decreases because the trees provide water and water is needed for photosynthesis.

• The number of poppy plants near the woodland increases because the trees increase the light and light is needed for photosynthesis.

• The number of poppy plants near the woodland decreases because the trees use up all the water and water is needed for photosynthesis.

Which row show the correct names of the blood cells X and Y?

• Blood cell X is a phagocyte, blood cell Y is a platelet

• Blood cell X is an erythrocyte, blood cell Y is a phagocyte

• Blood cell X is an erythrocyte, blood cell Y is a platelet

• Blood cell X is a phagocyte, blood cell Y is a erythrocyte

What is the function of a phagocyte?

• engulf patogens

• transport oxygen

• transport carbon dioxide

• produce antigens