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non albuminous or ex albuminous
pea , groundnut
albuminous seed
castor, wheat, maize, barley
perispermous seed
beet, blackpepper
the pollen tube releases the tow male gametes into
cytoplasm of synergids
polar nuclei are situated _______ the egg apparatus in the large central cell
below
multicarpellary syncarpous ovary
papaever
multicarpellary apocarpous ovary
michellia
The microsporangia develop further and become
pollen sacs
It nourishes the developing pollen grains possess dense cytoplasm and generally have more than one nucleus
tapetum
When the anther is young, a group of compactly arranged homogenous cells called the______ occupies the centre of each microsporangium.
sporogenous tissue
Pollen grains are generally spherical measuring about______ in diameter
25-50μm
Pollen grains are generally spherical measuring about______ in radius
12.5-25μm
It is a thin and continuous layer made up of cellulose and pectin.
intine
which cell of pollen grain has abundant food reserve and irregularly shaped nucleus
vegetative cell
which cell of pollen grain has spindle cell and nucleus and dense cytoplasm
generative cell
came into India as a contaminant with imported wheat, has become ubiquitous in occurrence and causes pollen allergy
parthenium
some cereals such as rice and wheat, pollen grains lose viability within
30 minutes
3 families whose pollen viability remains for months
Rosaceae, Leguminoseae and Solanaceae
The body of the ovule fuses with funicle in the region called
hilum
_____represents the junction between ovule and funicle.
hilum
Ovules generally differentiate a single megaspore mother cell (MMC) in the_____ region
micropyle
Integuments encircle the nucellus except at the tip where a small opening called the
micropyle
what does this diagram represents
megaspore dyad
This method of embryo sac formation from a single megaspore is termed
monosporic development
no of mitosis required to form embryo sac
3
no of cells in embryo sac
7
no of nucleus in embryo sac
8
common pancy aka
viola
plants which produce two type of flower
oxalis, viola, commelina
Only a small proportion of plants use
abiotic agents
Pollination by ____ is more common amongst abiotic pollinations
wind
Wind-pollination is quite common in
grasses
Pollination by water is quite rare in flowering plants and is limited to about ____
genera
30
pollination by water is mostly seen in
monocots
water pollinated freshwater plants
vallisneria and hydrilla
marine plants which is pollinated by water
zostera
plants pollinated by water
Vallisneria, Hydrilla, Zostera, sea grass
Pollen grains in many such species are long, ribbon like, mucilaginous, and they are carried passively
water pollinated
pollen grains are light and non-sticky ,They often possess well-exposed stamens so that the pollens are easily dispersed
wind pollinated
dominant biotic pollinating agent
bees
flowers are large, colourful, fragrant and rich in nectar. When the flowers are small, a number of flowers are clustered into an inflorescence to make them conspicuous.
insect pollinated
The flowers pollinated by _____ and ____ secrete foul odours to attract these
animals.
flies and beetles
In some species floral rewards are in providing safe places to lay eggs; an example
amorphophallus
a simple relationship between ____ and ____ in which they can’t complete their life cycle without each other
yucca and moth
the diagram shows pollination in
vallisneria
Continued self-pollination result in
inbreeding depression
Majority of flowering plants produce
hermaphrodite
If both male and female flowers are present on the same plant
monoecious
ex of monoecious
castor and maize
male and female flowers are present on different plants, that is each plant is either male or female
dioecious
ex of dioecious
papaya
what does this image describe
Pollen tubes growing through the style
All these events–from pollen deposition on the stigma until pollen tubes enter the ovule–are
together referred to as
pollen pistil interaction
which event is unique to flowering plants.
double fertilisation
The central cell after triple fusion becomes the
primary endosperm cell
The coconut water from tender coconut that you are familiar with, is
nothing but
free-nuclear endosperm
the surrounding white kernel of coconut is the
cellular endosperm
The zygote gives rise to the
proembryo
correct order
zygote → proembryo → globular embryo → heart shaped embryo → mature embryo
incorrect order
zygote → proembryo → heart shaped embryo → globular embryo → mature embryo
in monocots the reduced cotyledon is known as
epiblast
In the grass family the cotyledon is called
scutellum
what does the encircled part represents
scutellum
______and ______ of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season
Dehydration and dormancy
discovered during the archaeological excavation at King Herod’s palace near the Dead Sea
Phoenix dactylifera
The seed germinated and flowered after an estimated record of 10,000 years of dormancy and was found in Arctic tundra
Lupinus arcticus
a few flowering plants such as some species of _____and ______ , have evolved a
special mechanism, to produce seeds without fertilisation, called apomixis.
Asteraceae and grasses
form of asexual reproduction that mimics sexual reproduction
apomixis.
Occurrence of more than one embryo in a seed is referred to as
polyembryony
ex of polyembryony
Citrus and Mango
Note 
Flashcard (33)