Flashcards in Flower Prac Deck (31):
What are angiosperms?
Seed-bearing plants that produce flowers
The seeds which contain plant embryo are produced in the _____.
All the parts of a flower are actually modified leaves that are ______for their roles in the ______ process.
Flower parts are arranged in circles called _____.
What is the base of the flower called?
What two groups can flower structures be divided into?
Essential organs and accessory organs
The essential organs are the ______ structures which include ____ (male) and ______ (female).
The accessory organs are the _____ and _____ which surround and protect essential organs.
The stamen is the male reproductive organ and consists of 2 parts the ____ and _____.
What is an anther?
Enlarged structure at the top of the stamen.
What is inside the anther?
What do pollen sacs produce?
How many sperm does each pollen grain contain?
What happens when pollen grains mature?
The pollen sacs split open to release dust like pollen.
What is the filament?
Thin stalk that supports the anther.
What is the pistil?
Female reproductive organ
What 3 parts does the pistil consist of?
What is the stigma?
An enlarged portion at the top of the pistil that becomes moist and sticky when mature.
What is the style?
Middle portion of the pistil, it is long and slender and sometimes Absent.
What is the ovary?
The enlarged structure at the bottom at the bottom of the pistil.
What are locules?
Hollow compartments in the ovary.
What does each locule contain?
What does each ovule contain?
Some flowers have all male or all female parts and are called _____. Examples include _______,_______.
What re perfect flowers?
Flowers that have both male and female flowers.
-Pollination occurs when pollen grains land on the sticky surface of the _______ and are trapped there.
-The pollen grains _______ and a pollen tube emerges from the grain.
-The pollen tubes grows down the _____ to the ovary and enters the ovule, making a continuous passageway for sperm to enter to the ovum.
-Fertilization occurs when the ____ join the _____.
The fertilized egg becomes an ____. The wall of the ovule thickens an forms a _____, thus enclosing and protecting the embryo. The ovule wall thickens and develops into a ______.(In some plants such as apples, the ovary walls become fleshy and contain sugars and starches, in other plants such as walnuts the ovary walls become dry and hard.)
What are sepals?
The outermost Whorl of the flower, they are leaf like and usually green in color.
What do sepals do?
Protect the inner part of the flower during the budding stage.
What are petals?
Directly beneath the sepals and largest part of the flower.