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Describe how phagocytic white blood cells destroy bacteria. (4)

The phagocyte recognises antigens on the surface of the bacteria as foreign, causing it to be attracted to the bacteria. The phagocyte then engulfs the bacteria, forming a vesicle around it. Lysozomes fus...

Answered by Sarah W. • Biology tutor

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You are told that a straight line runs through 2 points: (1,1) and (2,3). What is the equation of the line?

Recall that all straight lines have the general equation y = mx + c, where m is the gradient of the line and c is the y intercept. First work out the gradient, m, of the line: Gradient = rise/run = (chang...

Answered by James P. • Maths tutor

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What is the subjunctive?

The subjunctive is a verbal mode, a way that we can change a verb so that it expresses a certain meaning. Normally we use the indicative mode to indicate something certain or regular, e.g. "Je vais à...

Answered by Dora D. • French tutor

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What type of blood does the pulmonary artery contain?

Deoxygenated blood

Answered by Kirushanth S. • Biology tutor

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What are the 2 methods used to manufacture ethanol? What are the advantages and disadvantages of both?

The hydration of ethene: Ethene and steam are passed over a catalyst - concentrated phosphoric acid (H₃PO₄) - at 300^OC and 60-70 atmospheres. This process is fast, continu...

Answered by James P. • Chemistry tutor

8996 Views