L13: Spores and Gametes Flashcards
perianth
petals and sepals
solitary flower
a flower that is not part of an inflorescence
inflorescence
a group of flowers arranged on a stem
nectary
a glandular structure within a flower which secretes sugary nectar to attract pollinators
where is the nectary located
commonly located at the base of flowers but position is not fixed within the floral morphology
what produces floral meristems
inflorescence meristems
what do floral meristems produce
floral organs
Is inflorescence meristems indeterminate or determinate
indeterminate
is floral meristem determinate or indeterminate
determinate
sporophyte
the multicellular diploid generation of a plant life cycle (2n)
gametophyte
the multicellular diploid generation of a plant life cycle (n)
mitosis
division of the nucleus that produces cells with genetically-identical nuclei
meiosis
special type of division that cuts the chromosome number in half
gametophyte (n) produces ______ (n) by mitosis
gametes
sporophyte (2n) produces ______ (n) by meiosis
spores
T/F: in mosses, haploid gametophyte is smaller than the sporophyte
F. it is larger
T/F: in flowering plants, diploid sporophytes is larger than gametophytes
T
where is pollen made
the anther
what does sporophyte meiosis yield
tetrad of 4 microspores
What do microspores produce after mitosis
yields a microgametophyte, also know as a pollen grain
Is pollen multicellular
yes
pollination
transfer of pollen to stigma
what happens after pollination
tube cell forms a pollen tube that grow toward the ovary. The generative cell then migrates through the pollen tube and divides to form 2 male gametophytes (2 sperm cells)
what does sporophyte meiosis yield
4 megaspores but only 1 survives
what is produced when a megaspores goes through funky mitosis
yields megagametophyte, also known as the embryo sac
