Botany: Part II
Growth &
Development
Plant Growth
Plants are able to grow throughout their lifetime due
to the presence of undifferentiated tissues called
meristems.
Apical meristems add primary growth and cause the
stem to increase in length. Apical meristems are
located at the tips of stems and roots.
Lateral meristems add secondary growth and cause
the plant to increase in girth.
Reproduction in Angiosperms
Flowers –
reproductive
structures of
angiosperm
sporophytes,
both male and
female organs
are present in
some
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Reproduction in Angiosperms
Flowers –
reproductive
structures of
angiosperm
sporophytes,
both male and
female organs
are present in
some
4
Double Fertilization in Angiosperms
5
Double Fertilization in Angiosperms
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Double Fertilization in Angiosperms
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Co-Evolution of Pollinators and Flowers
8
Structure of the Mature Seed
A seed consists of a
dormant plant
embryo, surrounded
by its food supply
(cotyledons,
endosperm, or
both). The seed is
surrounded by a
hard, protective seed
coat.
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Two Common Types of Germination
Germination begins
with imbibition, the
uptake of water by
the dry seed.
Rupturing of the seed
coat triggers
metabolic changes
that allow the plant
embryo to resume
growth.
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Adaptations for Seed Dispersal
A seed consists of a dormant plant embryo,
surrounded by its food supply (cotyledons,
endosperm, or both). The seed is surrounded by a
hard, protective seed coat.
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Created by:
Jackie Snow
AP Biology Teacher and Instructional Facilitator, Belton ISD
Belton, TX