Chapter 30 Part B: Plant Diversity II (Slide Flashcards
All angiosperms belong to which phylum?
Phylum Anthophyta
What are Angiosperms two key adaptations
Flowers and fruit
An angiosperm structure specialized for sexual reproduction
Flower
What transfers pollen from one flower to the sex organs of another?
Insects or other animals
What is an example of an angiosperm that is wind pollinated?
Grass
Specialized shoot
Flower
Flowers have four types of modified leaves called
Floral organs
Usually green and enclose the flower bud
Sepals
Often brightly colored to attract pollinators; wind-pollinated flowers are not usually brightly colored
Petals
Are microsporophylls, male reproductive organs
Stamens
Are megasporophylls, female reproductive organs
Carpels
Stamen consists of a stalk called a
Filament
A stamen consists of a filament and a terminal sac called a(n)
Anther
Produced within the anthers and develop into pollen grains which contain the male _______________
Microspores; gametophytes
Carpel consists of an ________ at the base of a _______ leading up to a sticky __________ that receives pollen
Ovary; style; stigma
What contains the female gametophyte(s) within the ovule(s)
Ovary
What develop into seeds?
Fertilized ovules
Single carpel or two or more fused carpels
Pistil
Flowers are variable in _______, _______, _________, and ________
Shape, size, color, odor
What kinds of symmetry do flowers have? (2)
Radial and bilateral
This type of symmetry, any imaginary line through the central axis divides the flowers into 2 equal parts
Radial
In what kind of symmetry can a flower only be divided into 2 equal parts by a single imaginary line
Bilateral
As seeds develop, the ovary wall thickens and the ovary matures into a
Fruit
What protects seeds and aid in their dispersal?
Fruit
Mature fruits can be either ______ or _______
Fleshy; dry
Tomatoes, plums, and grapes
Fleshy fruits
Soft ovary wall
Pericarp
Beans, nuts, and grains
Dry fruits
What are ways fruit and seeds and help disperse seeds? (1)
Dandelions; function like parachutes for wind dispersal
What are ways fruit and seeds and help disperse seeds? (2)
Coconuts; adapted to float for dispersal by water
What are ways fruit and seeds and help disperse seeds? (3)
Fruits modified as burrs cling to animal fur
What are ways fruit and seeds and help disperse seeds? (4)
Vividly colored fruits are eaten by animals and dispersed in their feces
What is contained within pollen grains?
Male gametophytes
What are produced by the microsporangia of anthers
Pollen grains
What contains a female gametophyte
Ovary
Ovule developed within the ovary and contains a female gametophyte
Embryo sac
What is contained within the embryo sac
Egg
What is released from the anther and carried to the sticky stigma at the tip of the carpel
Pollen
Some flowers can ______-pollinate, but most have mechanism to ensure _________-pollination
Self; cross
Transfer of pollen from a different individual
Cross-pollination
What germinate on the stigma and produce a pollen tube
Pollen grains
What grows down to the ovary
Pollen tube
What penetrates the Micropyle
Pollen tube
A pore in the integumentary that discharge two sperm cells
Micropyle
Both sperm cells are used in a process called
Double fertilization
In double fertilization: One ________ fertilized the _______ forming a __________ zygote
Sperm; egg; diploid
In double fertilization: The other sperm fuses with __ nuclei in the _________ _____, forming a ______ cell (3n)
2; embryo sac; triploid
In the Angiosperm life cycle (ALC), the fertilized ________ matures into a seed
Ovule
In the ALC, the ________ forms a sporophyte embryo with a simple root and __ or 2 ____________ (seed leaves)
Zygote; 1; cotyledons
In ALC, the triploid cell forms a _________, tissue rich in starch and other food for developing embryo
Endosperm
In ALC, what emerges when the seed coat ruptures?
Embryo as a seedling
Food stored in the endosperm and cotyledons is used until when?
The seedling can start photosynthesis
Monicots have how many cotyledon?
1
Dicots have how many cotyledon?
2
_________ and _______ have influenced each other’s evolutionary histories
Animals; plants
What interaction may have affected the rate of new species formation
Plant-pollinator
Comprise more than 290,000 species
Angiosperms
Angiosperms are divided into 2 groups:
Monocots and Dicots
One cotyledon
Monocots
Two cotyledons
Dicots
“True” dicots
Eudicots
Form a clade that includes most of the species once categorized as dicots
Eudicots
Parallel veins
Monocots
Netlike veins
Eudicot
Vascular tissue scattered
Monocots
Vascular tissue usually arranged in ring
Eudicot
Root system usually fibrous (no main root)
Monocot
Taproot (main root) usually present
Eudicot
Pollen grain with 1 opening
Monocots
Pollen grain with 3 openings
Eudicot
Floral organs usually in multiples of 3
Monocots
Floral organs usually in multiples of 4 or 5
Eudicot
What are the 2 small lineages of remaining dicots
Basal angiosperms and Magnoliids
Amborella trichopoda, water lilies, and star anise
Basal Angiosperms
Consist of about 100 species
Basal Angiosperms
Consist of about 8,500 species
Magnoliids
Include both woody and herbaceous plants
Magnoliids
Genetically more closely related to Monocots and eudicots
Magnoliids
About 1/4 of angiosperms
Monocots
About 72,000 species
Monocots
Orchids, grasses, and palms
Monocots
Maize, rice and wheat
Grasses
More than 2/3 of angiosperms
Eudicots
210,000 species
Eudicots
What is the largest group of Eudicots?
Legume family (peas and beans)
Oak, maple, walnut, willow, and birch
Eudicots
Key sources of food, fuel, wood products, and medicine
Seed plants
Where does most of our food come from?
Angiosperms
Products of relatively recent genetic change resulting from artificial selection
Modern crops
The ________ and ______ of seed are treated in domesticated plants compared to wild relatives
Number; size
Provide edible products including tea, coffee, chocolate, and spices
Flowering plants
Sources of wood used for field, paper production, and construction
Seed plants