Plants Pt. 5 Flashcards
(13 cards)
What is a stimuli?
A thing or event that evokes a specific functional reaction in an organ or tissue.
How do plants respond to environmental changes?
Plants grow their stems, roots, or leaves toward or away from the stimulus.
What factors can manipulate flowering in plants?
Temperature and day length can be used to manipulate flowering.
How does temperature influence flowering in some plants?
Temperature alone can influence flowering; for example, many bulb plants must be exposed to cold temperature to mature.
What is the importance of daily temperature changes for plants?
Many plants require a daily change of temperature between night and day for optimal photosynthesis and respiration.
What is dormancy in plants?
A period when the growth or activity of a plant or seed stops due to changes in temperature or water.
What is the purpose of dormancy?
Dormancy allows species to survive in particular environments and ensures seeds germinate when conditions are favorable.
What happens to leaves before winter?
Leaves fall from trees prior to winter conditions, and leaf buds do not open until spring conditions are favorable.
What is a tropism?
A response or behavior where plants grow their stems, roots, or leaves toward or away from a stimulus.
What is phototropism?
The way a plant grows or moves in response to light.
What is gravitropism?
The way a plant grows or moves in response to gravity; also called geotropism.
What is hydrotropism?
The way a plant grows or moves in response to water.
What is thigmotropism?
The way a plant grows or moves in response to touch.
