defence how it helps skin ? stomach acid kills many swallowed pathogens The table shows two of the body's defences against disease. How does the skin help t...

A long arthropod has a body made of many similar segments, with legs on nearly every segment. This describes a...

Substrate concentration Relative rate low 5 medium 9 high 12 very high 12 The table shows reaction rate at increasing substrate concentrations with a fixed a...

A microorganism that causes disease enters the body through a cut in the skin. What is the general term for such a disease-causing organism?

Hormone Source organ FSH pituitary gland LH pituitary gland oestrogen ovary progesterone ovary Using the table of hormones and their source organs, which pai...

Sample Benedict's Iodine 1 brick-red orange-brown 2 blue blue-black 3 brick-red blue-black Three samples were tested with Benedict's solution and with iodine...

Property Value number of cells produced four chromosome content haploid The table shows the products of one division of a cell by meiosis. Which description ...

Row Stimulus Response A bright light pupil becomes wider B dim light pupil becomes narrower C bright light pupil becomes narrower D dim light lens becomes th...

cell surface area / arbitrary units A 10 B 14 C 48 The table gives the surface area of three similar cells. Which cell is best adapted for absorbing water an...