Con:FlowersLEC26 Flashcards
Angiosperms are divided into what 2 main group?
monocots & dicots
What is the characteristics of monocots?
Ex. orchids, palms, barley, lilies
1 cotyledon
parallel veins
no main root
What is the characteristics of dicots?
Ex. roses, poppies, oaks, peas, zucchinies
2 cotyledons
netlike veins
taproot
What are the parts of the stamens?
anther(produce pollen)
filament
What are the parts of the carpels?
stigma
style
ovary
How are seeds dispersed?
by wind, animal droppings, & hitchhiking on animals
Angiosperms originated how many years ago?
at least 140 mya, but much later than that. they originated about the same time mammals started dominate the planet.
Co-evolutionary spiral.
What are the most important ecological links on Earth?
pollination & seed dispersal by animal
What are examples of unusual pollination?
・orchid mimicing a female bee
・amorphophallus made from clusters of little flowers
・rafflesia attracting flies from its stink
T or F. Seed plants are the most important to human survival & medicine.
TRUE
What is causing extinction of many plants & animals they support?
habitat destruction
How many acres of rainforest are we losing?
90 acres per minute
At this rate, half of Earth’s species will become extinct within how many years?
the next 100-200 years
T or F. Plants have organs & tissues.
TRUE
What important functions does roots have?
anchoring the plant
absorbing minerals & water
storing nutrients
In most plants, the absorption of water & minerals occurs where?
Ex. baby radish
near root hairs
What are examples of roots?
propstorage
“strangling” aerial
buttress
pneumatophores
What are examples of modified stems?
rhizomes
bulbs
stolon
tubers
What is the main photosynthetic organ of most vascular plants?
the leaf
What are the parts of the leaf?
blade
petiole
What are the 3 types of leaf?
simple, compound, & doubly compound
What are examples of modified leaves?
tendrils spines storage leaves reproductive leaves bracts
What is indeterminate growth?
when a plant can grow throughout its life
What is determinate growth?
when some plant organs cease to grow at a certain size
What are annuals?
plants that complete their life cycle in a year or less
What are biennials?
plants that require 2 growing seasons
What are perennials?
plants that live for many years
Where is an apical bud located?
near the shoot tip, causes elongation of a young shoot
what is an axillary bud?
a structure that can form a lateral shoot or branch
what does the apical dominance do?
helps maintain dormancy in most nonapical buds
what covers the root tip & what does it do?
a root cap, protects the apical meristem as the root pushes through soil
what are the 3 zones of cells that causes growth behind the root tip?
zone of cell division, elongation, & maturation
what are parts of the root?
epidermis
cortex
vascular cylinder
