Chapter 24 Flashcards
What are flowers?
modified leaves where reproductive organs go
What are fruits?
ripened ovaries/ anything with seeds
What are the four types of modified leaves found in flowers?
The four types are sepals, petals, stamens, and carpels.
What are the male and female parts of a perfect flower?
The male part is the stamen
the female part is the carpel.
What are the two parts of the stamen?
anther and the filament.
What are the three parts of the carpel?
stigma, style, and ovary.
What are the functions of the male parts of a flower?
1) holds anthers
2) produces pollen
What are the functions of the female parts of a flower?
1) egg bearing structures
2) in angiosperms holds stigma
3) recieves pollen
What is the life cycle of a generalized angiosperm?
The life cycle includes germination, flowering, pollination, fertilization, and seed dispersal
How are pollen grains produced?
Pollen grains are produced from microspores through meiosis and mitosis.
How are embryo sacs produced?
Embryo sacs are produced from megaspores through meiosis and mitosis.
What is pollination?
transfer of pollen to female reproductive part
What is fertilization?
when gametes come together
What is germination?
period of growth after non-growth
What is double fertilization?
when 2 things get fertilized
What are ovules?
site where egg cell is fertilized
What is endosperm?
triploid tissue that stores food for the embryo
How many microspores are created from one microspore mother cell?
4
How many pollen grains are created from each microspore mother cell?
4
How many cells are present in a typical pollen grain?
two cells.
What are generative and tube cells?
1) makes 2 sperm nuclei
2) builds the tube
How many megaspores are created from one megaspore mother cell?
4
How many megaspores survive?
Only one megaspore survives.
How many rounds of mitosis without cytokinesis occur in the embryo sac?
Three rounds of mitosis
