SB5g Plant Defences

Question 1

aseptic techniques

Answer 1

Techniques used to keep out unwanted microorganisms, such as out of cultures.

Question 2

autoclave

Answer 2

Machine used to sterilise equipment and culture media using pressure and heat.

Question 3

chemical defence

Answer 3

Use of chemical compounds to defend against attacks by pathogens, such as lysozyme and hydrochloric acid in humans, and poisons and insect repellents in plants.

Question 4

cuticle

Answer 4

An outer covering that is not made of cells. Plants have a cuticle covering the leaves.

Question 5

pest

Answer 5

Any unwanted organism, such as animals that damage crop plants.

Question 6

physical barrier

Answer 6

A barrier that makes it difficult for pathogens to get into the body, such as skin, mucus and cilia in animals, and cuticles and cell walls in plants.

Question 7

symptom

Answer 7

Something that is suffered when an organism is ill, such as pain, or is a sign of illness, such as a high temperature.