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1) Within a population there is variation among individuals

2) Some of these individuals will be better suited to survive in their environment

3) These individuals are more ...

1) Dead/Inactive/Attenuated Microorganisms activate immune response

2) White blood cells produce antibodies

3) Antibodies kill microorganisms

4) This allows fo...

A big difference between Spanish and English is the fact that Spanish nouns have a gender, so, for instance, we would say that a table is feminine and a book is masculin. This is important because if a...

Subtract the second equation from the first, giving you: 4x^2 -5x -6

Factorise the quadratic: (4x + 3)(x - 2)

x = -0.75

x= 2

Now substitute these...

Take the simple sentence 'I am good' - 'I' is the subject, 'am' is the first-person of the verb 'to be', and 'good' is the adjective.In English, the verb 'to be' is needed in adjectival sentences to link ...