Parts of a Flower
Flower Vocabulary
Plant Hormones
Plant Tropisms
Misc.
100
The _____________________ form a protective layer around the bud of a developing flower
Sepals
100
A plant that houses both male and female parts on the same individual is known as ____________________
Monoecious
100
A ___________________ is a chemical signal produced by living organisms
Hormone
100
Plants react to environmental stimuli using growth responses called _____________________
Tropisms
100
The ___________________ of a plant refers to the number of hours of light and darkness it receives
Photoperiod
200
The _________________________ attract pollinators by their color or scent
petals
200
A plant that houses only male or female parts on a single individual is known as _____________________
Dioecious
200
The plant hormone __________________ stimulates cell elongation, which can cause directional bending in shoots
auxins
200
Change in auxin concentration can cause sunflowers to grow towards a light source; this is an example of __________________
Phototropism
200
_________________ is a period of inactive growth that will not resume unless a specific physiological requirement is met. This leads into ___________________, a state in which a plant can quickly resume growth if environmental conditions are favorable
Dormancy; quiescence
300
Name the flower structure labeled G
Stamen
300
The matured ovary of a flower develops into a thickened structure called a ________________, which protects the seed
Fruit
300
The plant hormone _____________________ stimulates growth and can cause dramatic increases in the size of stems and fruits; this hormone is involved in "foolish seedling" disease
Gibberellins
300
In _______________________, the shoots of plants grow in the opposite direction of the pull of gravity
Gravitropism
300
State the pigment that is responsible for the orange coloring of fall foliage. State the pigment that is responsible for a plant's physiological transition between seasons.
Carotenoids; phytochrome
400
Name the flower structure labeled E
Carpel/pistil
400
____________________ refers to a period of inactivity where plant embryos cease development until the return of favorable conditions
Dormancy
400
Which plant hormone is involved in shifting plant embryos into dormant states?
Abscisic acid
400
What tropism is being shown in the following picture? (a vine wraps around an object it encounters)
Thigmotropism
400
Would the plant below be best described as monoecious or dioecious
Monoecious
500
Name the flower structure labeled C
Style
500
____________ _______________ is a method of asexual reproduction in which genetically identical individuals are propagated from a cutting of meristematic tissue from a parent plant
Vegetative reproduction
500
The picture shown below is a result of the action of which plant hormone?
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Ethylene
500
What type of tropism is being depicted in the following picture?
Gravitropism
500
List and describe three phytochemicals
Alkaloids: nitrogen-based compounds like caffeine and nicotine that are toxic to most animals
Capsaicin: activates mammalian pain receptors if ingested
Glucosinolates: found in cruciferous vegetables, irritating and pungent when crushed
Jasmonic Acid: activates the production of proteins that harm insect digestive tract
Volatile Organic Compounds: chemicals released in the air which signal parasitic wasps to attack herbivorous insect