The document discusses the structure and types of flowers. A bisexual or perfect flower contains both male and female reproductive structures (stamens and ovary). Flowers can be unisexual, containing either male or female structures alone. Plants bear either monoecious flowers on the same plant or dioecious flowers on separate male and female plants. A complete flower contains all four whorls - calyx, corolla, stamens, and carpels, while essential whorls directly aid reproduction.
6. The Flower
Structure Of A Bisexual
Flower
BISEXUAL FLOWER
• Bisexual or perfect flowers
have both male (androecium)
and female (gynoecium)
reproductive structures,
including stamens and an
ovary.
7. The Flower
Structure Of A Bisexual
Flower
UNISEXUAL FLOWER
• A flower that has only one
reproductive structure, either
male or female, is called a
unisexual flower.
8. The Flower
Structure Of A Bisexual
Flower
STAMINATE FLOWER
• A unisexual flower, which
contains only androecium is
called a male or Staminate
flower.
9. The Flower
Structure Of A Bisexual
Flower
PISTILLATE FLOWER
• A unisexual flower, which
contains only gynoecium is
called a female or Pistillate
flower.
10. The Flower
Structure Of A Bisexual
Flower
NEUTER FLOWER
• A flower in which both male
and female reproductive
organs are absent is called a
neuter flower.
12. The Flower
MONOECIOUS PLANT
• If the male and female
flowers grow on the same
plant, then the plant is said to
be a monoecious plant.
• E.g. Pumpkin, Maize,
Cucumber
13. The Flower
DIOECIOUS PLANT
• If the male and female flowers
grow on separate plants, then
the plant is said to be a dioecious
plant.
• Examples: Palm, Papaya.
15. The Flower
COMPLETE AND INCOMPLETE FLOWERS
• When all the four whorls of the
flower are present, it is called a
complete flower.
16. LEARNING OUTCOME
To study the structure of bisexual flower
To summarise essential and non-essential
reproductive whorls
17. The Flower
COMPLETE AND INCOMPLETE FLOWERS
• When all the four whorls of the
flower are present, it is called a
complete flower.
• All bisexual flowers are generally
complete flowers.
• Example: Hibiscus
19. The Flower
COMPLETE AND INCOMPLETE FLOWERS
• Essential/ Reproductive Whorls
• The whorls that are directly associated
with the process of reproduction.
20. The Flower
COMPLETE AND INCOMPLETE FLOWERS
• Essential/ Reproductive Whorls
• The whorls that are directly associated
with the process of reproduction.
• E.g. Stamen and Carpel
21. The Flower
Non- Essential/ Non-Reproductive
Whorls
• The whorls that are not directly
associated with the process of
reproduction.
22. The Flower
Non- Essential/ Non-Reproductive
Whorls
• The whorls that are not directly
associated with the process of
reproduction.
• Help and protect the reproductive
parts of the flower
• E.g. Calyx And Corolla.
24. The Flower
Non- Essential/ Non-Reproductive
Whorls
PERIANTH
• In plants, such as wheat and
grasses, the petals and sepals are
undifferentiated and together
compose the Perianth.
25. The Flower
Non- Essential/ Non-Reproductive
Whorls
PETALOID PERIANTH
• In some plants, the sepals
are not green but appear
brightly coloured as the petals.
26. The Flower
Non- Essential/ Non-Reproductive
Whorls
PETALOID PERIANTH
• These sepals are called
petaloid sepals, and the
perianth is called a petaloid
perianth.
27. The Flower
Non- Essential/ Non-Reproductive
Whorls
PETALOID PERIANTH
• These sepals are called
petaloid sepals, and the
perianth is called a petaloid
perianth.
• E.g. Orchid
28. The Flower
Non- Essential/ Non-Reproductive
Whorls
SEPALOID PERIANTH
• In some plants, the petals appear
green in colour and are called
sepaloid petals.
29. The Flower
Non- Essential/ Non-Reproductive
Whorls
SEPALOID PERIANTH
• The perianth is called a sepaloid
perianth.
30. The Flower
Non- Essential/ Non-Reproductive
Whorls
NECTARIES
• Nectar is a sugary liquid
produced by plants.
31. The Flower
Non- Essential/ Non-Reproductive
Whorls
NECTARIES
• The nectar in flowers is
secreted by a group of cells,
present either at the base
of the pistil or on the petals.
• These groups of cells are called
nectaries.
32. The Flower
Non- Essential/ Non-Reproductive
Whorls
NECTARIES
• They attract insects such as bees and
ants for cross pollination.
• In some cases, nectaries are very
prominent.
33. The Flower
Non- Essential/ Non-Reproductive
Whorls
NECTARIES
• E.g. Nasturtium
34. LEARNING OUTCOME
To study the structure of bisexual flower
To summarise essential and non-essential
reproductive whorls
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
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Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
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Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
An overview of the content of the lesson
Must be in the form of a question where appropriate
Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address
Verbs such as to understand / to know / to gain confidence / to learn
Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully