Reproductive Plant Organs Flashcards
Production of offspring from vegetative organs
Asexual reproduction
Production of offspring from union of gametes
Sexual reproduction
Cost and benefit of asexual reproduction
Easy to propagate, not adaptable
Cost and benefit of sexual production
Requires union, variation, adaptable
Parts of flower
calyx (sepals), corolla (petals), perianth, stamen, gynoecium
Has four floral parts
Complete flower
Has one or two missing floral part
Incomplete flower
Two positions of ovary
Superior, inferior (what’s the diff?)
Perfect flower
Stamen and pistil both present
Imperfect flower
Lacks one sex organ
Flowr that has similar size and shape, has radial symmetry
Actinomorphic
Flowr that has unequal size and shape, has bilateral symmetry
Zygomorphic
Staminate and pistilate are on the same plant
Monoecious
Have staminate OR pistilate
Dioecious
Problem of plants
They are sessile/immobile
It’s the megasporocyte (megaspore mother cell)
Ovary
Egg development
Ovary- meiosis - megaspore (4, only one survives) - mitosis - egg
Pollen development
Microsporocyte - pollen grain - male gametophyte - stigma - pollen tube growth - fertilization - zygote - seed growth - germination
Types of placentation
Parietal, marginal, axial, locule
Unfused carpel
Apocarpus
Fused carpel
Syncarpus
The transfer from stamen to stigma
Pollination
2 types of vectors/agents of pollination
Abiotic (undirected = wastage) and biotic (directed)
It is the stalk attached to the cell wall
Placental tissue