Plant Hormones

Question 1

Communication between cells

Answer 1

1) Communication by direct contact
2) Communication by local signalling (paracrine or synaptic)
3) Long-distance signalling (animal hormones)

Question 2

Plant hormones

Answer 2

Plant hormones transmit information locally or over long distances

Plant hormones are important for:

Growth (Cell expansion and division)

Development and differentiation

Responses to the environment

Question 3

Plant Growth

Answer 3

Plant hormones act at low concentrations to promote, inhibit or modify growth (sub millimolar-nanomolar)

Plant growth requires cell division and cell elongation

Cell division takes place in localised meristems

Cell elongation takes place away from meristems

Question 4

Plant Tissue

Answer 4

Dermis: protective covering

Ground tissue: metabolic functions

Vascular tissue: transports materials root to shoot and shoot to root

Question 5

Auxin