Plant cells Flashcards
Broad categories of modern plants
Nonvascular and vascular
Present only in vascular plants. Tissue specialized for the transport of water and solutes through a plant
Vascular tissue
These include mosses, liverworts, and other related plants
Nonvascular plants
Nonvascular plants have ______ instead of roots, flat broad tissues that contain chloroplasts like leaves
rhizoids
More than 90% of modern plants are _______
Vascular plants
Most vascular plants have leaves that are covered with and are also provided with pores for gaseous exchange
Cuticle
The size of the leaf pores in vascular plants are controlled by special cells called
Guard cells
There are about ______ known species of plants on Earth
500, 000
The cell walls of new plants are harder because of the compound ____
Lignin
Protects plants from winter’s cold. Other produce antifreeze compounds.
bud scales
Vascular plants produce either to reproduce
spores or seeds
A protective structure that contains a plant embryo and stored food.
Seed
The more recent classification of plants is based on the use of _______
Biochemistry and molecular biology
10 divisions of plants
Marchantiophyta (liverworts), Anthocerotophyta (hornworts), Bryophyta (mosses),
Filicophyta (ferns),
Cycadophyta (cycads),
Sphenophyta (horsetails),
Pinophyta (conifers),
Ginkgophyta (ginkgo)s,
Gnetophyta (gnetophytes)
Magnoliophyta (Angiosperms)
Include all nonvascular plants: the other 9 include vascular plants
Bryophyta
The Bryophyta includes three classes:
Mosses, liverworts, and hornworts
The vascular plants are classified into _______
Seedless plants (ferns) and seed plants
Seed plants are divided into
gymnosperms and angiosperms
Producing seeds that lack a protective fruit
Gymnosperms
Produced seeds enclosed and protected by a fruits
Angiosperms
Flowering plants
Angiosperms
Angiosperms with only one cotyledon
Monocots
Angiosperms with two cotyledon
Dicots
A series of organisms through which energy moves, in the form of foods.
Food chain
Scattered with hair-like structures
Monocot roots
Ability to grow deep and without hair-like structures
Dicot roots
Function of Plants
Source of food and materials
Human diet include plants
Use to make cotton and rope
Produce wood for building houses and paper
Use in spices and coffee
In sexual reproduction, the two kinds of gametes are produced by the mosses
Egg and sperm
The egg producing organ of moss is called an
Archegonium
The sperm producing organ of moss is called
Antheridium
Fertilization produces a blank that undergoes mitosis and become a sporophyte
Zygote
In asexual reproduction, there are two ways by which mosses reproduce asexuality
Fragmentation and Gemmae production
Occurs when small pieces break from a gametophyte and grow into a new plant
Fragmentation
Are tiny pieces of tissue that can form new gametophyte
Gemmae
A kind of moss that form peat bogs, converts a pond into marshy soil
Peat moss
Wet ecosystem that is home to many interesting organisms like the carnivorous plants
Peat bog
The name was given because of a belief of people in medieval times that the plant could cure liver disease
Liverworts
Like some of those liverworts however, the archegonia and antheridia of this form inside the plant
Hornworts
Vascular plants that reproduce by soil
Seedless vascular plants
Plant whose highly branched stems resemble the straws in the broom
Whisk fern
Underground stems that functions as roots are called
Rhizomes
It is not a true moss. It is a low-growing vascular plant
Club moss
Have photosynthetic stem and underground rhizomes like the whisk ferns
Horsetails
The largest group of living seedless vascular plants are the
Ferns
What are the Seedless Vascular Plants
Whisk Ferns
Club Mosses
Horsetails
Ferns
The main function of this is to absorb water and minerals
Roots
The core of the root consist of a vascular cylinder which contains xylem and phloem
Structure
In this root, the vascular tissue form a solid core at the center of the root
Dicot roots
The vascular tissue forms a ring that central region of cells known as pith
Monocot roots
A layer of cells separate the cortex from the vascular cylinder
Endodermis
Root types
Fibrous root system of grass
Taproot system of dandelion
The first root to emerge
Primary root
In some plants such as the beets and carrots, the primary roots enlarge called
Taproot
In grass, the roots are numerous and are extensively branch called
Fibrous roots
Holds the leaves up to the sunlight and transport water and food between roots and leaves
Stem
Plants use their many leaves to trap light for
Photosynthesis
Leaves consist of
Broad flat blade and stemlike petiole
Surround the stomata and regulate the entrance and exit of materials depending on environmental
Guard cells
Plant Movement and response
Phototropism
Gravitropism
Nastic movement
Photoperiodism
Thigmotrophism
The response of plants to a light source
Phototropism
The growth in response to gravity
Gravitropism
The response of plants to touch causes plants
Thigmotrophism
The response that occur in the same way regardless of the direction of the stimulus
Nastic movement
Any response to a plants that is linked to day length
Photoperiodism
Plants have a special group of chemicals called
hormones
Organic compounds that are produced and released by one part of an organism
Hormones
The first identified plant hormones
Auxins
A plant hormone that causes cells to grow
Auxins
A plant hormone that causes the cell to grow larger
Gibberellins
Cause cells to divide and stimulate seeds to germinate and grow
Cytokinins
Control dormancy and this enables plants to survive
Ethylene and Abscisic Acid
Consist mostly of secondary xylem
Wood
The outer light-colored layers of secondary xylem is called
Sapwood
When the xylem get clogged, they become dark-colored and called
Heartwood
They are gymnosperms trees, lack fibers, and are easy to cut and nail
Softwoods
Have veins that run parallel to each other
Monocot leaves
Can either be pinnate or palmate
Dicot leaves
Like feather with a smaller veins
Palmate leaves
The theory that explains water movement in plants is known as the
Transpiration - cohesion theory
Produce reproductive structures called seed instead of spores
Seed plants
All seeds contain this and stored food in a protective “seed coat”
Embryo
Seeds that are inactive while they wait for optimal growing conditions
Dormant seeds
There are about numbers species of gymnosperms
700
Gymnosperms have m and f what and on the same tree the produce m and f what
Cones and gametes
A structure consisting of an egg and develops into a seed
Ovule
The transfer of pollen from the male to female part of the plant
Pollination
The reproductive structure of angiosperms is
Flower
Attracts pollinators and protect the developing flowers
Sterile parts
The egg-producing part of flower is called
Pistil
In male, the pollen-producing part of the flower is called
Stamen
The sterile parts of the flowers are the
Petals and sepal
Asexual reproduction that occurs naturally in plants is called
Vegetative reproduction
A way to make two different plants grow as one by diffusing their cut ends
Grafting