Test 3 Study Guide
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Sepals together make up the?
calyx
Petals together make up the?
corolla
The Stamens are made of?
the anther and filament
The carpals (pistil) is made of?
sigma, style and ovary
What is located inside of the anther?
diploid cells called the microspore mother cells
What will the microspore mother cells do during meiosis?
divide into 4 microspores
A pollen grain is made of?
A microspore
What is inside of pollen?
will have a generative cell and a tube cell
What problem does the tube cell solve?
the non-motile sperm issue
Where are male gametes located inside of the tube cell?
stuck to the side of the pollen tube
What does the tube cell do?
When the pollen grain lands on the stigma, the tube cell will form the pollen tube and grow into the ovary and release sperm directly into the ovule
What does the generative cell do?
divide by mitosis to form 2 sperm cells
Most flowering plants can be identified by?
their pollen grains
3 of the macrospores won’t?
mature into the zygotes, only 1 will become the egg in the embryo sac
What is the funiculus?
stalk supporting ovule
What do the integuments do?
becomes the seed coat
What is the microphyle?
where the pollen tube will grow through to reach the ovary
What is the function of antipodials?
No found functions, but may produce some hormones
What occurs during double fertilization?
The first sperm fertilizes the egg. The second sperm forms the triploid endosperm
What occurs with the second sperm during fertilization?
the second sperm will fuse with polar nuclei and form endosperm
What is the endosperm?
triploid tissue which is excellent at storing starch. This starch storing tissue feeds the embryonic plant
In monocots the endosperm?
is seperate from the cotyledon
In dicots the endosperm?
is fused with the cotyledon
A zygote is made of?
egg + sperm