B1c

Question 1

describe malaria using the terms parasite and host

Answer 1

malaria is caused by a protozoan, which is a parasite. it is a parasite because it lives off of other organisms called hosts. humans are the host in malarias case

Question 2

what is a vector (regarding disease)

Answer 2

something that transports a disease by carrying it inside it and then infecting another organism with it (mosquito in malarias case)

Question 3

give a way somebody could alter their lifestyle to reduce the risk of cancer

Answer 3

• stop smoking prevents lung cancer
• do not drink excess alcohol prevents liver, gut, mouth cancer
• do not get sunburnt prevents skin cancer
• have a healthy diet (rich in fibre) helps prevent bowel cancer

Question 4

what is the difference between a malignant or benign tumor

Answer 4

malignant - a tumor that can spread across the body to other parts. described as cancerous
benign - a growth that does not spread, not described as cancerous