Plant development Flashcards
(27 cards)
A multicellular structure made of diploid cell that produces male and female spores by meioses
Sporophyte
A multicellular structure made of male and female haploid cells (spores) which produce gametes by meioses
Gametophyte (male and female)
Zygote
Formed when an egg cell and sperm cell join
Alternation of generation
Refers to the alternation of the phases of plants from haploid to diploid phases and back
Mosses and Ferns alternate between:
Haploid and diploid phases
in plants, haploid cells can reproduce using…
Mitosis
In conifers, male and female gametophytes are in the…
cone scales
In mosses the dominant phase is
gametophytes (haploid)
In ferns and angiosperms and conifers, the dominant generation is
sporophyte (diploid)
The familiar conifer adult phase is…
Sporophyte (diploid) generation
Vegetative Propagation
Asexual reproduction in plants (mitosis only)
Certain plant groups produce organs that are used for asexual reproduction
Tubers (potatoes), Rhizomes (IRISES), Stolens(STRAWBERRIES), Bulbs, Corms (like bulbs)
Hormones
Chemicals that regulate the growth, development, and function of an organism
Hormones affect changes in particular cells known as…
Target cells
IMPORTANT types of Hormones…
In plants
Giberellins
Cell elongation
Cytokinins
Fruit development
Abscisic Acid
Opening and closing of Stomata
Ethylene
Ripening of fruit and regulation of metabolic activity
Auxins
Growth Factors (TROPISMS)
TROPISM
Involuntary respons to an external stimulus like light, water, gravity, or nutrients.
Phototropic
Grow towards light
Negatively Phototropic
Grow away form light
Geotropic tropic
Grow toward center of the earth
