B5 quick questions

Question 1

what is a communicable disease

Answer 1

a disease that can be transmitted from one organism to another

Question 2

what is a pathogen

Answer 2

a microorganism that causes disease

Question 3

name four types of pathogen

Answer 3

virus
protist
fungi
bacteria

Question 4

how can pathogens spread

Answer 4

air, water, direct contact

Question 5

how do bacteria make you ill

Answer 5

reproduce rapidly and release toxins that harm tissues

Question 6

how do viruses make you ill

Answer 6

they reproduce inside cells, damaging and destroying them

Question 7

name three examples of viral diseases

Answer 7

measles, HIV, tobacco mosaic virus

Question 8

name two bacterial diseases

Answer 8

gonorrhoea, salmonella

Question 9

name four methods of controlling the spread of communicable disease

Answer 9

good hygiene, isolating infected individuals, controlling vectors, vaccination

Question 10

describe an example of a protist disease

Answer 10

malaria-caused by a protist pathogen that is spread from person to person by mosquito bites, and cause reacurent fevers

Question 11

describe an example of a fungal disease in plants

Answer 11

rose black spot- spread by water and wind, and affects plants growth by reducing its ability to photosynthesize

Question 12

how can the cause of a plant disease be identified

Answer 12

gardening manuals and websites, monoclonal antibody tests and labartory testing

Question 13

what are three mechanical devices that protect plants

Answer 13

thorns and hairs, leaves that droop or curl, mimicry to trick animals

Question 14

give three physical defences of a plant

Answer 14

cellulose cell walls, tough waxy cuticles, bark

Question 15

how can aphids be controlled by gardeners

Answer 15

introduce ladybirds to eat the aphids

Question 16

how can plant diseases be detected

Answer 16

areas of decay, discolouration, growths, malformed stem of leaves, presence of pests, spots on leaves, and stunted growth