Info about page 46 and 47

Question 1

What do viruses and bacteria have in common

Answer 1

They are both very small

Question 2

Name a difference between bacteria and viruses

Answer 2

bacteria are very small cells
viruses are not cells but still tiny

Question 3

Explain where viruses live and what they do

Answer 3

they live inside your cells
-and replicate themselves using the cells machinery to produce many copies of themselves
-the cell will naturally burst, releasing new viruses

Question 4

Cell damage definition

Answer 4

what makes us feel ill

Question 5

What are all protists called

Answer 5

eukaryotes and most of them are single-celled

Question 6

As well as protisys what else are they

Answer 6

-parasites
-they live on or inside other organisms and can cause them damage
-often transferred to the organism by a vector

Question 7

Name a characteristic about fungi

Answer 7

-they are single-celled and some have a body made up of hyphae (a thread like structure)

Question 8

What is the function of a hyphae

Answer 8

they can grow and penetrate human skin and the surface of plants causing diseases

Question 9

what else can hyphae produce

Answer 9

spores, that can be spread to plants and animals

Question 10

Name 3 viral diseases

Answer 10

-measles
-HIV
-tobacco mosaic virus (TMV)

Question 11

Explain the disease Measles

Answer 11

it is a viral disease
-spread by droplets from an infected persons sneeze of cough
-develop a red skin rash and show signs of a fever
-can be very serious or fatal

Question 12

Name two things measles can lead to

Answer 12

pneumonia
inflammation of the brain

Question 13

How to prevent measles

Answer 13

most people are vaccinated when young

Question 14

Explain the disease HIV

Answer 14

-it is spread by sexual contact or exchanging bodily fluids such as blood
-causes flu-like symptoms
-the virus attacks immune cells

Question 15

How can HIV be controlled

Answer 15

by antiretroiviral drugs

Question 16

Explain the disease Tobacco mosaic virus

Answer 16

-it affects many species of plants (tomatoes)
-causes a mosaic pattern, and parts of the plant become discoloured
-the discolouration causes photosynthesis to be not carried out and the virus affects growth

Question 17

Name a disease caused by a protist

Answer 17

Malaria

Question 18

Where does malarias protists life cycle take place

Answer 18

-inside a mosquito

Question 19

Explain how malaria develops through mosquitoes

Answer 19

-mosquitos are vectors and they pick up malarial protist when they feed on an infected animal
-everytime the mosquito does this it infects it by inserting the protist into an animals blood vessel

Question 20

Malaria can cause repeating episodes of

Answer 20

fever, it can be fatal

Question 21

47how can malaria be prevented from spreading

Answer 21

-by stopping mosquitos from breeding
-by using insecticides and moquito nets