Core Terminology 9: Plant responses

Question 1

Stimulus

Answer 1

any change in the environment to which an organism responds.

Question 2

Hormone

Answer 2

a chemical messenger; that either stimulates or inhibits.

Question 3

Growth

Answer 3

permanent increase in size

Question 4

Differentiation

Answer 4

changing of cells so they can perform specific functions.

Question 5

Apical meristem

Answer 5

an area where repeated mitosis takes place (terminal bud)

Question 6

Stimulate

Answer 6

to cause more/ increase a response

Question 7

Inhibit

Answer 7

to stop or slow down a response

Question 8

Tropism

Answer 8

growth movement of plant in response to an external stimulus in environment

Question 9

Phototropism

Answer 9

growth of plants in response to light, (+) phototropic grow towards light, (-) phototropic grow away from light

Question 10

Geotropism

Answer 10

growth of plants in response to gravity, (+) geotropic towards gravity, (-) geotropic away from gravity

Question 11

Pathogen

Answer 11

micro-organism that causes disease

Question 12

Thorn

Answer 12

adapted leaves found on a stem

Question 13

Apical dominance

Answer 13

phenomenon where auxins in terminal buds inhibits the growth of lateral buds