Flowering Plants / Angiosperms Flashcards
What are the components of a flower?
What is meant by double fertilization?
How does the angiosperm life cycle differ from that of a gymnosperm?
What are fruits and what parts do they develop from?
A fruit is the mature ovary of a flowering plant, it contains seeds, may be dry or fleshy.
Why is a tomato technically not a vegetable?
A tomato has seeds so it is a fruit. A vegetable can be any other edible parts of plant.
What are the differences between monocots & dicots?
How do the flowers of eucalypts, daisies, Proteaceae and grasses differ from complete flowers?
•Flower types
–Complete Flowers: have all flower parts
–Perfect Flowers: have male & female parts (Daisy)
–Imperfect Flowers: staminate or carpellate (eucalypts)
–Actinomorphic Flowers: radial symmetry
–Zygomorphic Flowers: bilateral symmetry
describe the reproduction in flowering plants
zygote (2n) is formed into the embryo (2n) which forms into the sporophyte (2n). the sporophyte then produced a microsporangium which produces the microspore mother cell (2n) and a megasporeangium which proces the megaspore mother cell (2n). The microspore mother cell (2n) undergoes meiosis which produces the microspore (n) while the megaspore mother cell (2n) undergoes meiosis which produces the megaspore (n). the megaspore (n) is formed into the megagametophye (n) also known as the egg (n) and the microspore (n) is formed into the microgametophyte (n) also known as the sperm (n). the egg (n) and the sperm (n) undergo gamete fusion to form a zygote (2n).
what is meant by double fertilisation?
one of the pair of sperm cells in the pollen tube fuses with the egg to produce the diploid zygote, the other with the central cell to produce the tripod endosperm. the zygote divides to form the embryo and a suspensor which acts as a nutritive link between the embryo and mother plant
