Sexual Reproduction In Angiosperms Flashcards
(95 cards)
1
Q
Plants with 1 ovule
A
Mango, rice, wheat
2
Q
Which plant has Edible integument and what is it called?
A
Lichi, Aril
3
Q
What is androphore?
A
Elongated internode between corolla and androecium.
4
Q
Which plant has Caruncle and what is it’s utility
A
Castor, attracts insects for dispersal
5
Q
Junction between ovule and funicle
A
Hilum
6
Q
Part of Funicle fused with ovule is called
A
Raphe
7
Q
Outgrowth from funicle or placenta that guides pollen tube
A
Obturator
8
Q
Plants with syncarpous gynoecium
A
Hibiscus, papavar/poppy
9
Q
Free carpels are called
And their examples are?
A
Apocarpous
Lotus, rose, michella
10
Q
Layers that are intact in a mature anther
A
Epidermis and endothecium
11
Q
Shape of generative cell
A
Spindle/ fusiform shaped
12
Q
Generative cell divides into?
A
2 non-motile male gametes
13
Q
In 60•/. Plants families pollen grain is released in the ____ stage
A
2- celled stage
Vegetative/tube cell and generative/germ cell
14
Q
Female gametophyte
A
Embryo sac
15
Q
Microsporophyll
A
Androecium
16
Q
Microsporophyll
A
Androecium
17
Q
Example of Orthrotropus
A
Polygonum
18
Q
Most common type of ovule in angiosperms
A
Anatropus
19
Q
1 megaspore mother cell forms how many megaspores. How many meiosis/mitosis take place in the process?
A
1 MMC forms 1 megaspore tetrad linear. 1 meiosis (meiosis 1+ meiosis 2) takes place
20
Q
In a megaspore tetrad linear which end gives the functional megaspore
A
Chalazal end
21
Q
Monosporic development in plants like
A
Polygonum and capsella
22
Q
Type of ovule in capsella
A
Campylotropus
23
Q
Number of meiosis/mitosis to form mature female gametophyte from a functional megaspore
A
3 mitosis
24
Q
Number of cells in a mature megagametophyte?
Number of nucleus?
A
7 celled
8 nucleated
25
Haploid polar nuclei fuse to form?
Diploid secondary nucleus just before fertilisation
26
Egg aparatus is made up of
Haploid Egg cell + halpoid synergids
27
Filliform appartus is found in
Synergids
28
Egg appartus present at which end of embryo sac
Micropyle
29
Type of pollination in which the plant is genetically self pollinated but functionally and ecologically cross pollinated
Geitonogamy
30
Types of pollination that cause inbredding depression
Autogamy, geitonogamy
31
Type of pollination where flowers are from different plants
Xenogamy
32
What is Cleistogamous and what type of pollination occurs in it?
Flowers that dont open
| Autogamy
33
Plants in which autogamy is rare
Chasmogamous (flowers that open)
34
Pollination of a flower by a different flower in the same plant is known as
Geitonogamy
35
Meiosis and mitosis required for 50 megagametophyte
50 meiosis + 150 mitosis
36
In a mature embryo sac, cell wall formation occurs for how many nuclei?
6
37
Antipodals are present at which end
Chalazal end
38
Type of ovule in which ovule is surrounded by funicle by 360⁰
Circinotropus
39
Type of ovule where the embryo sac is horse shoe shaped
Amphitropus
40
Type of ovule where the ovule body is at 90⁰ to the funicle
Hemitropus/horizontal
41
Nucellus from which end of ovule differenciate to form megaspore mother cell
Microphyle
42
Formation of megaspore(n) from megaspore mother cell (2n)
Megasporogenesis
43
Ploidy of nucellus
Diploid
44
Examples of plants with peripsperm
Beetroot, castor, black pepper
45
Plants with both cleistogamous as well as chasmogamous flowers
Viola (common pansy) , Commelina, Oxalis
46
Dominant biotic pollinator
Bee
47
Floral rewards given to animals to aid in pollination
Pollen grain, nector, safe place to lay eggs
48
Flower that provides safe place to lay eggs as a floral reward
Amorphophallus (6 ft in height)
49
Insects that consume pollen/nector but without bringing about pollination are known as
Pollen/nector robbers
50
Adaptations for insect pollinated flowers
Large, colorful, fragrant, rich in nector
51
Pollen grains of water pollinated species are protected from wetting by a
Mucilaginous covering
52
Both Wind and water pollinated flowers are not very colorful and do not produce nector.
T/F ?
True
53
How many genere of plants are water pollinated
30
54
Examples of water pollinated plants
Vallisneria, Hydrilla, Zostera
55
Plant with Longest pollen grain
Zostera (ribbon-like)
56
Not all aquatic plants use water for pollination
| T/F ?
True
57
Aquatic plants that are not water pollinated
Water lily, Water Hyacinth
58
Water lily is pollinated by?
Insects or wind
59
Most common abiotic agent of pollination
Wind (Anaemophily)
60
Most common biotic agent of pollination
Insects (Antemophily)
61
Examples of Larger animals that act as pollinators
Primates (lemurs), reptiles (gecko lizards, garden lizards), arboreal rodents
62
Adaptation of a plant which is pollinated by beetles or flies
Secreation of foul odours
63
Wind pollination is most common in ?
Grasses
64
Examples of plants that are wind pollinated
Corn, grasses family (poaceae, graminae)
65
Adaptations of pollen grain in wind pollinated plants
Light and non sticky
66
Only type of pollination which during pollination brings genetically different types of pollen grains to stigma
Xenogamy
67
Type of Pollination which is functionally cross pollinated, involving a pollinating agent but genetically similar to autogamy
Geitonogamy
68
Seed setting is assured in
Cleistogamous
69
Flowers that are invariably autogamous
Cleistogamous
70
Flowers in which autogamy is rare
Chasmogamous
71
Pollination by bats is known as
Chiropterophily
72
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Pollination by-
Birds
Ants & termites
Snakes
Snails
Animals
```
```
Orthnithophilly
Myermicrophilly
Ophiophilly
Malacophilly
Zoophilly
```
73
Adaptations for self pollination
* Monocliny (bisexual/ hermaphrodite)
* Homogamy
* Cleistogamous flower
74
Examples of monoecious plants
Maize, wheat, coconut, castor, cucurbits
75
Plants which have male and female flowers in separate plants are known as
Dioecious
76
Examples of dioecious plants
Papaya, Date palm
77
Type of pollination that can place in self sterile plants
Xenogamy
78
Outbredding devices
* Dicliny (unisexual flower)
* Chasmogamous
* Heterostyly
* Dichogamy
* self incompatibility/ self sterility
79
Condition when anther devolops before stigma
Protoandry
80
Condition where the stigma becomes receptive first
Protogyny
81
Type of devolopment megaspore in angiosperms
Monosporic devolopment
82
Ovule of angiosperm is equivalent to
Megasporangium
83
Proximal end of filament is attached to
Thalamus , petal or tepals
84
Floriculture is ?
The breeding, cultivating and marketing of flowers
85
Plants that are monocarpic and perennial
Bamboo -50 to 100 yrs
| Strobilanthus kunthiana- 12 yrs
86
Advertising flag
Massaenda plant
87
Pollen structure with sculpturing design
Exine
88
Due to which chemical deposition pollen grains are well preserved as fossils
Sporopollenin
89
Ploidy of cells of a tetrad
Haploid
90
A multicarpellary, apocarpous gynoecium is found in
A Lo R Mi (lotus, rose and michella
91
Chemical essential for growth of pollen tube is
Boron
92
Pollen tube shows ___ growth
Apical
93
Pollen tube shows ___ movement towards ____
Chemotropic/ chemotactic, synergids
94
Characteristics of orthnithophillus flowers
* Charming color (yellow)
* large flower
* nector
* no fragrance
95
Characteristics of chirepterophillous flowers
* strong fragrance
* dull flowers
* rich in nectar
