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Chapter 2: Plant Diversity
Plant Diversity
23
Science
5th Grade
09/20/2010

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Term
spore
Definition
Cells in seedless plants that grow into new organisms.
Term
rhizoid
Definition
One of the hairlike fibers that anchor a moss to the soil and take in water from the soil.
Term
frond
Definition
The leaf of a fern.
Term
rhizome
Definition
The underground stem of a fern.
Term
asexual reproduction
Definition
The production of a new organism from only one cell.
Term
fertilization
Definition
The joining of a sperm cell with an egg cell to make one new cell, a fertilized egg.
Term
sexual reproduction
Definition
The production of a new organism from a female sex cell and a male sex cell.
Term
seed
Definition
An undeveloped plant with stored food sealed in a protective covering.
Term
angiosperm
Definition
A seed plant that produces flowers.
Term
gymnosperm
Definition
A seed plant that does not produce flowers.
Term
conifer
Definition
Any of a group of gymnosperms that produce seeds in cones and have needlelike leaves.
Term
cotyledon
Definition
A tiny leaflike structure, also called a seedleaf, inside the seed of an angiosperm.
Term
monocot
Definition
An angiosperm with one cotyledon in each seed.
Term
dicot
Definition
An angiosperm with two cotyledons in each seed.
Term
ovary
Definition
A structure containing egg cells.
Term
pollination
Definition
The transfer of a pollen grain to the egg-producing part of a plant.
Term
embryo
Definition
The immature plant inside a seed.
Term
seed coat
Definition
The outer covering of a seed.
Term
fruit
Definition
The ripened ovary of a flowering seed plant.
Term
response
Definition
What a living thing does as a result of a stimulus.
Term
stimulus
Definition
Something in the environment that causes a living thing to react.
Term
tropism
Definition
A growth response of a plant toward or away from a stimulus.
Term
adaptation
Definition
A characteristic that enables a living thing to survive in its environment.
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