What does Homo refer to ?
Use the key to identify the insect.
Which part is the partially permeable membrane ?
Which statement describes the effect of temperature on this reaction ?
What are the names of regions 1, 2 and 3 ?
What are the nitrates used to make ?
Which nutrient would be in low levels in this diet ?
Where does amylase act on food ?
How is transport in the plant affected ?
Under which conditions will the dye move slowest ?
What is the function of cell X ?
What are the labelled structures ?
Which reaction releases the greatest amount of energy ?
How have the seedlings responded ?
Which one is placed in the uterus ?
Which proportion of calves shows that the bull is pure-breeding for curved horns ?
Which process causes this ?
What has contributed to this increase ?
Which of the following animals lives in the most polluted water ?
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