quiz Flashcards
means a flower has both carpels and stamens
bisexual
means a flower has only a staminate or pistillate
unisexual
comprise the calyx.
Sepals
comprise the corolla.
Petals
male reproductive organ of a flower
androecium
female reproductive organ of a flower
gynoecium
Each __________ is made up of distinct layers of cells when mature.
microsporangium
The outermost layer is the ________. It has a middle layer of cells with thin walls.
epidermis
The innermost layer is the _______, which consists of large cells. It nourishes the developing grains of pollen.
tapetum
Microspore mother cells undergo _______.
meiosis
exine is made up of a durable substance called
sporopollenin
The outer layer is the
exine and thin spaces (germ pores)
grows out of the pollen grain through the germ pores.
pollen tube
The inner layer is the
cellulosic wall (the intine)
moves towards the periphery.
microspore
The main part of the ovule is bounded by two coverings
integuments
The ovule is attached to the ovary via a stalk
funiculus
The basal part of the female gametophyte structure
chalaza
contains one or more ovules (megasporangia), which act as future seeds
ovary
develops as a type of projection from the placenta in the ovary.
ovule
Within the nucleus, a single ________ cell becomes larger and it becomes the megaspore mother cell.
hypodermal
This cell undergoes ___________, and then gives rise to four haploid megaspore cells.
meiotic division
The enlarged structure, shaped like an oval and with 8 nuclei, is known as the _______
embryo sac
Cell membranes and nuclei develop around the nuclei, except the two at the center of the sac, which is now termed as the _______
central cell
