Plant response

  1. Define stimulus

Anything in somethings environment that makes it respond differently

  1. Define tropism

The type of plant growth that moves away or towards the stimulus

  1. Define photoperiodism

The plants respond to the amount of darkness it has.

  1. What is phototropism?

The way the plant moves with light

  1. What is thigmotropism?

The way a plant responds to touch

  1. Give an example of a positive and negative thigmotropism.

Positive:Venus fly trap

Negative: Roots

  1. What is gravitropism?

The plants reaction to gravity

  1. Give an example of a positive and negative gravitropism.

Positive: Roots

Negative: Stems

  1. When do long-day plants bloom?

Summer

  1. Give an example of a long-day plant (use your notes).

Carnations

  1. When do short-day plants bloom?

Late summer early fall

  1. Give an example of a short-day plant (use your notes).

Poinsettias

  1. When do day-neutral plants bloom?

Anytime

  1. Give an example of a day-neutral plant (use your notes).

Roses

  1.  Define plant hormones.

Chemical messengers for plants

  1. List 4 plant hormones.

Auxins, ethylenes, Gibberlens, cytokines

  1. What is auxin responsible for?

Plant growth

  1. What does ethylene do in fruits? In leaves?

Ripens them

  1. What do gibberellins increase the rate of?

Cell division

  1. What do cytokinins do?

Slows the aging process