Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Botany > S.rep. In Flowering Plants (nb included) > Flashcards

S.rep. In Flowering Plants (nb included) Flashcards

1
Q

Protection of essential whorls in bud conditions is the function of ?

A

Calyx (sepals).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are osmophores?

A

Glands present on petal that produce few volatile secretion i.e flavinoids which result in fragrance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Advertisement flag is found in ______?

A

Musanda, in which one of the petal enlarges in size & becomes brightly coloured to attract pollinators.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Butterfly shaped corolla i.e vexillary aestivation is found in

A

Leguminous plants ( pea, beans)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Generally stamen is bithecous (2 anther lobes) but in ______ it is monothecous.

A

In malvaceae family (cotton family).

Monothecous = 1 anther lobe = 2 pollen sacs i.e bisporangiate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Study of pollen grains is called

A

Palynology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Father of palynology is

A

Erdtman.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Covering around pollen grain is called

A

Sporoderm has 2 layers- Intine & exine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Inner smooth covering m/o cellulose & pectin is called

A

Intine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Formation of pollen tube is the function of Intine/Exine.

A

Intine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Exine is

A

Outer rough covering m/o sporopollenin (most resistant substance in biological world).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

___________ is the most resistant substance in biological world.

A

Sporopollenin.
It helps in fossilisation of pollen grains.
Absent in pollen grains of zostera.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Regions through which pollen tube emerges out is called

A

Aperture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q 
Pollen grain having 
a) 1 apperture     
b) 2 appertures
c) more than 2 appertures
d) no apperture 
Is called?
A

1 apperture = monotreme
2 appertures = ditreme
No apperture = atreme
More than 2 appertures =polytreme

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q 
Monocots are 
🥇Monocolpate 
🥈Bicolpate 
🥉Tricolpate
🏅NOT
A

Monocolpate i.e have 1 large circular (colpa type) apperture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Dicots are tricolpate .

T/F

A

T.

Dicots are tricolpate i.e have 3 large circular (colpa type) appertures.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

In 60% angiosperms, pollen grains are shed at ___ celled stage.

A

2-celled stage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Anther wall consists of ___ layers. Name them in order.

A 
4 layers:
Epidermis (outermost)
Endothecium ( hvng deposition on radial & inner tangential walls)
Middle layers 
Tapetum ( nourishing tissue, innermost)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Endothecium has deposition of ___________ on ____ walls.

A

Deposition of α-cellulosic fibres on radial & inner tangential walls.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

__________ has role on dehiscence of anther.

A

Endothecium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Reasons for high DNA content in tapetal cells include:

a) endomitosis
b) restitution endonuclei
c) polyteny
d) all of these

A

All of these.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q 
Tapetal cells are : 
Extra large sized
Having dense cytoplasm 
Prominant nucleus
Polygonal in shape 
High DNA content 
How many of the statements given above are correct?
A

All are correct.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Give few functions of tapetal cells?

A
  1. Nourishing tissue -only path of transport of nutrients from middle layers to pollen grain.
  2. Produces callase for breakdown of callose wall.
  3. Produces ubish bodies that secrete sporopollenin.
  4. Produces tryphine ( for specie specific recognition).
  5. Secrete flavinoids, lipids,carbohydrates = pollen kit = sticky nature & protection from UV rays.
  6. Defective tapetum results in non-viable seeds.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Amoeboid tapetum (primitive type) is found in

A

Typha

Potamogeton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Secretory tapetum (advanced type) is found in

A

Mostly found in monocots.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Dicuss microsporogenesis phase 1 ( formation of microsporangia)?

A

Immature anther ——> hormonal imbalance causing irregular rate of division ——> tetragonal str. ——>differentiation of cells into large sized cells with high cytoplasmic density & prominant nucleus c/d archesporial cells ——> periclinal division into PPC’s & PSC’s ——>PPC repeated periclinal & anticlinal division ——> anther wall & PSC repeated mitosis ——>PMC’s

PPC = primary parietal cells
PSC = primary sporogenous cells
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Origin of anther wall ( endothecium, tapetum, middle layers) is

A

PPC’s (primary parietal cells)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Origin of PMC is

A

PSC’s (primary sporogenous cells)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Origin of PPC’s & PSC’s is

A

Archeosporial cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Most common arrangement of microspores is

A

Tetrahedral type ( in dicots).

31
Q

Most advanced type of arrangement of microspores is

A

Isobilateral (in monocots)

32
Q

In-vitro germination of pollen grains is k/a

A

Hanging drop experiment.

for example pea, chick pea.

33
Q

In plants fertilization was discovered by

A

Strasburger.

34
Q

Double fertilization in angiosperms was discovered by

A

Nawaschin in Lilium and fritillaria.

35
Q

____,____,____ are angiosperms that lack double fertilization therefore don’t have endosperm.

A

Trapaceae
Orchidaceae
Podostemonaceae

36
Q

Siphinogammy (fert. hvng facility of pollen tube) in angiosperms was discovered by

A

Amici from Portuluca.

37
Q

Movement of pollen tube towards a specific ovule is guided by

A

CBIS-complex i.e calcium-boron-inositol-sugar complex.

Obturator (guiding tissue that arises from funiculus of ovule).

38
Q

Polysiphinous condition is observed in

A

Malvaceae and cucurbitaceae.

I.e more than 1 pollen tube arises from 1 pollen grain.

39
Q

Entry of pollen tube into ovule occurs through

A 
Micropylar end (porogammy) 
Chlazal end (chlazogammy/basogammy)
Sides or integuments (mesogammy)
Ovule comes out to receive pollen tube (acrogammy)
40
Q

Entry of pollen tube into embryo sac occurs through

A

Micropylar end only.

Bcz of presence of synergids at micropylar end

41
Q

Father of plant embryology is

A

Rudolf camerarius.

42
Q

Father of indian plant embryology is

A

P.Maheshwari

43
Q

Anemophilly occurs in

A

Pollination by wind occurs in
Grasses (maize, lawn grass)
Higher plants ( willow,populus)
Gymnosperms

44
Q

Sulphur shower phenomenon (shower of golden dust) is shown by

A

Pinus.

45
Q

Pollen allergy is caused by

A

Parthenium
Amaranthus
Chenopodium
Russian populus.

46
Q

Epihydrophilly is seen in

A

Vellisneria (tape grass)

Pollination occurs on surface of water.

47
Q

Hypohydrophilly is seen in

A

Zostera (sea-grass)

Pollination occurs under the surface of water.

48
Q

Distyly is controlled by

A

S-gene

49
Q

Tristyly is controlled by

A

S-gene and M-gene

50
Q

Gametophytic form of self-incompatibility is found in

A

Solanaceae
Liliaceae
Poaceae

51
Q

Sporophytic form of self-incompatibility is seen in

A

Brassicaceae

Asteraceae

52
Q

For fertilization, S-alleles present on pollen grain and stigmatic surface should be

A

Opposite (different) as suggested by opposite S-allele hypothesis.

53
Q

70% pollination occurs by

A

Insects (entemophilly).

Major pollinator are bees that carry 80% of entemophilly.

54
Q

Entemophillous plants are

A 
Sunflower 
Rose
Amorphophallus
Salvia
Yucca
Aristolochia
55
Q

Reward for pollinators is:

A

Food =Nectar and sometimes pollen grains also.

Shelter

56
Q

Pseudocoulation mechanism of entemophilly occurs in

A

Group of plants called Ophrys.

57
Q

Turn pipe mech. of entemophilly is seen in

A

Salvia (sage plant)

58
Q

Trap door mechanism is seen in

A

Fig (ficus carica).

59
Q

Fly trap mech. Of entemophilly is seen in

A

Rafflesia
Arums
Aristolochia *(modified form of fly trap mech. k/a pit fall mechanism).

60
Q

Translator mechanism of entemophilly is seen in

A

Calotropis.

61
Q

Zoophilly occurs in

A

Revenula by lemur.

Flax by lizards

62
Q

Ornithophilly (by birds) occurs in

A

Silk-cotton (bombax).

63
Q

Ophiophilly (by snakes) occurs in

A

Santalum.

64
Q

Malacophilly (by snails) occurs in

A

Arisemia (cobra plant).

65
Q

Chiropterophilly (by bats) occurs in

A

Adansonia

Banana

66
Q

Mirmecophilly ( by ants) occurs in

A

Australian acacia.

67
Q

Factors affecting viability of pollen grains is/are

A

Pollen cytology
Temperature
Humidity

68
Q

Plants that show both cleistogammy (closed flowers) and chasmogamous flowers (open flowers) are

A

Commelina
Oxalis
Viola

69
Q

Most primitive type of ovule is

A

Orthotropous (straight ovule)

for example Gymnosperms, polygonum.

70
Q

Horse shoe shaped ovule is

A

Amphytropous (curvature in body as well as embryo sac)

for example butomaceae.

71
Q

Most common type of ovule is

A

Anatropous (inverted ovule = 180 °) found in 85% angiosperms.
for example gamopetallae

72
Q

Type of ovule found in opuntia is

A

Circinotropous ( 360 ° )

73
Q

Type of ovule found in Ranunculus is

A

Hemi-anatropous (½-inverted =90 °)

74
Q

Type of ovule found in leguminaceae is

A

Campylotropous (curvature in body).

Botany (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions