Infection And Responce

Question 1

What is rose black spot and its symptoms?

Answer 1

A fungus
Purple/ black dots on leaves
Leaves can go yellow and fall off
Less photosynthesis & growth
Spread by water and wind
Treatment by fungicides and removing effected leaves

Question 2

What is measles?

Answer 2

A virus
Red skin rash and fever
Sometimes leads to pneumonia
Spread by droplets from sneezing or coughing

Question 3

What is HIV?

Answer 3

A virus
Flu like symptoms
Attacks immune cells causing immune deficiency
Could cause AIDS
Spread by bodily fluids (e.g sex, needles)
Can be treated at early stages with antiretroviral drugs

Question 4

What is TMV?

Answer 4

Tobacco mosaic VIRUS
Effects lots of plants e.g tomato’s
Parts of leaves become discoloured =
Can’t photosynthesise very well so effects growth

Question 5

What are the three ways pathogens can be spread?

Answer 5

Water
Air
Direct contact

Question 6

What are the three main ways white blood cells defend against pathogens?

Answer 6

• Consuming or ‘engulf’ called phagocytosis
• B-lymphocytes produce antibodies
• producing antitoxins