Hormones
A substance produced in one part of an organism that effects another part of the plant.
Hormone
Plants that grow, flower, and produce seeds in ONE year.
Annuals
Plants that like summer days with lots of light and not so much dark are called ___ ____ plants.
Long day
A plant's response to light is called ____tropism.
Photo
The _____ protects the root as it grows through the soil.
Rootcap
The hormone, cytokinins, will stimulate cell division and causes ____ seeds to sprout.
dormant
Plants that grow, & produce seed in TWO years.
Biennials
Plants that like days with a little amount of light and lots of dark are called ____ ____ plants.
Short day
A plant's response to gravity is called ____tropism.
Gravitropism
Plants that don't have any woody tissue or bark are called ____ plants.
Herbaceous
The hormone Auxin does what in the stem of the plant?
Makes it grow toward light and away from gravity
Plants that keep on growing year after year.
Perennials
When days shorten the amount of _____ will stop, and the other colors will appear.
Chlorophyll
A plant's response to touch or feel is called _____tropism.
Thigmotropism
Xylem tubes that don't conduct water and turn a dark color are called ___wood.
Heartwood
Name 2 of the plant areas where hormones are made. There are four.
Apical meristems, young leaves, growing seeds, developing fruits.
Sugar beets, carrots, turnips belong to which of the 3 plant groups.
Biennials
When daylight shortens the first thing that happens with the leaf is _____.
Cells at the petiole will weaken and leaf will fall off.
When a plant grows toward a stimulus it is called a _____ tropism.
Positive
Xylem tubes that still conduct water are called ____wood.
Sapwood
The hormone, Gibberellin does what to the plant?
Makes it grow TALL.
Marigolds, corn, peas belong to which of the 3 plant groups.
Annuals
As day length gets shorter, auxin levels will _____, and ethylene gas production will ____.
Auxin will DROP, and ethylene gas will INCREASE.
Plants that like 12 hours of light and 12 hours of dark are called ___ ____ plants.
Day neutral
How plants respond to dark and light periods is called ____.
Photoperiodicity