during this groups first growing season, it germinates, grow roots, very short stems, and leaves. During its second growing season it produces flowers.
plant's stem and leaves growing upwards is an example of _______________.
response of a plant to changes in the lengths of day and night due to the changes in the seasons
a plant's response to touch stimulus
if the length of the nights and days does not determine the flowering cycle of a plant, then it is referred to as_______________.
length of their life cycle
used to classify angiosperms
most have herbaceous stems and complete their life cycle within one growing seasons
time of year when long-day plants bloom
a plant's growth response toward or away from a stimulus
flowering plants that live for two or more growing seasons.
critical night length
number of hours of darkness that a plant must have in order to bloom
speeds up the rate of plant growth
chemicals produced by a plant that control and affect plant growth and development
hours of darkness
determines whether or not a plant will flower
type of plants that flower when the nights are shorter
most of the plants in this group have woody stems that survive through the winter months
time of year when short-day plants bloom
plant's response to the stimulus gravity
period during the year when the activity of many plants stops
plant's movement in the direction of a stimulus