B: phagocytes
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Some factors associated with coronary heart disease are listed. 1 high blood pressure 2 high intake of fruit and vege…
Which statements about arteries are correct? 1 All arteries carry oxygenated blood. 2 Arteries carry blood at high pr…
Which chamber of the heart has the thickest walls?
A red-flowered plant is crossed with a white-flowered plant. All the offspring have red flowers. What is the genotype…
A person with Down's syndrome is born with 47 chromosomes in each cell, instead of 46. What could cause this?
What is an example of assimilation?