Lesion

Definition

A patch of damaged tissue; in Chalara ash dieback, lesions form in the bark.

Used by Edexcel

Specification 5.5 · Paper 1

Infection can also move into twigs and branches, where it produces dark lesions—patches of damaged bark. Shoots beyond the damage may die back, giving the disease its name.
Revise: Protist and Fungal Infections: Malaria and Chalara Ash Dieback

1
For Chalara ash dieback, give both leaf loss and bark lesions. For malaria, mention damage to both blood and liver.

Create a free account to read GCSE Biology revision notes for your exam board and track your progress.

GCSE Biology · key term

A patch of damaged tissue; in Chalara ash dieback, lesions form in the bark.

Used by Edexcel

Specification 5.5 · Paper 1

Infection can also move into twigs and branches, where it produces dark lesions—patches of damaged bark. Shoots beyond the damage may die back, giving the disease its name.
Revise: Protist and Fungal Infections: Malaria and Chalara Ash Dieback

1
For Chalara ash dieback, give both leaf loss and bark lesions. For malaria, mention damage to both blood and liver.

Create a free account to read GCSE Biology revision notes for your exam board and track your progress.