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NEET BIOLOGY > Sexual Reproduction In Flowering Plants > Flashcards

Sexual Reproduction In Flowering Plants Flashcards

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1
Q

Several……….and………….changes are initiated which lead to the differentiation and further development of the floral primordium

A

hormonal. structural

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2
Q

The proximal end of the filament is attached to the………or……….of the flower.

A

thalamus

the petal

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3
Q

typical microsporangium appears near……….in outline

A

circular

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4
Q

Outer three wall layers perform the function of protection and not all help in dehiscence of anther to release the pollen.
True or false

A

False

outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

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5
Q

In young anther a group of compactly arranged………… cells called the sporogenous tissue occupies the centre of………..microsporangium.

A

homogenous

each

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6
Q

The pollen grains represent the male gametes
True or false

A

False

The pollen grains represent the male gametophytes

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7
Q

Pollen grains are generally spherical measuring about……….micrometers in diameter

A

25-50 diameter

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8
Q

one of the most resistant organic material known………

A

sporopollenin

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9
Q

Thin and continuous layer made up of cellulose and pectin……..

A

intine

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10
Q

Vegetative cell has abundant food reserve and a large regularly shaped nucleus
True or false

A

False
irregularly shaped nucleus

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11
Q

60 per cent of angiosperms, pollen grains are shed at

A

2-celled stage

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12
Q

Parthenium or carrot grass that came into India as a contaminant with imported <rice/wheat> has become ubiquitous

A

wheat

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13
Q

Pollen viability is highly variable and to some extent depends on the……….&………..

A

prevailing temperature and humidity

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14
Q

In some cereals such as rice and wheat, pollen grains lose viability within……..of their release

A

30 minutes

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15
Q

In some families like ………./……/……. they maintain viability for months

A

Rosaceae, Solanaceae Leguminoseae
“Rose Sold her Leg”

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16
Q

store pollen grains of a large number of species for years in liquid………… at……. Degree Celsius

A

Nitrogen -196

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17
Q

Ovule is a small structure attached to the placenta by means of a stalk called……

A

funicle

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18
Q

Chalaza, representing the <basal /top> part of the ovule.

A

basal

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19
Q

Six of the eight nuclei are surrounded by…….. and organised into cells;

A

cell walls

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20
Q

Synergids have special cellular thickenings at the micropylar tip called……….

A

filiform apparatus

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21
Q

Filiform apparatus play an important role in guiding the pollen tubes into the……..

A

synergid

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22
Q

Transfer of pollen grains from the anther to the stigma of the same flower is ………..

A

Autogamy

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23
Q

Viola (common pansy), Oxalis, and Commelina

A

produce two types of flowers – chasmogamous and cleistogamous

24
Q

Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called………

A

Geitonogamy

25
Q

Majority of plants use <biotic/abiotic> agents for pollination

A

Biotic

26
Q

Pollination by water is quite rare in flowering plants and is limited to about……… genera, mostly……

A

30

monocotyledons

27
Q

Water pollination examples

A

Vallisneria and Hydrilla which grow in fresh water

marine sea-grasses such as Zostera

28
Q

Tallest flower of……..

A

Amorphophallus 6 feet in height

29
Q

Moth deposits its egg into the ……. Of ovary

A

Locule

30
Q

Many insects may consume pollen or nectar without bringing about pollination. Such visitors are referred to…………

A

Pollen robbers

31
Q

Majority of flowering plants produce…………… flowers

A

Hermaphrodite

32
Q

Continued self pollination results in ……………….

A

Inbreeding depression

33
Q

Unisexual flower but bisexual plants are……./………../…../……/…….

A

Castor
maize
coconut
palm
cucurbits

34
Q

For pollen shed at 2 called stage the generative cell divides to form male gametes ………… growth of pollen tube.

A

During

35
Q

All events from pollen deposition until …………. Into ovule is called pollen pistil interaction

A

Enters of pollen tube

36
Q

If female parent is unisexual flower then only bagging is required and the flower is bagged
True or false

A

False
The flower buds are bagged before flowers open

37
Q

Endosperm development proceeds after embryo development
True or false

A

False
Endosperm dvp. Precede embryo dvp.

38
Q

Embryo develops at…………. End of the…………..

A

Micropylar end of the embryo sac

39
Q

Radicle and root cap are enclosed in ……………. Sheet coleorrhiza

A

Undifferentiated

40
Q

Epicotyl has shoot apex and few ……………….. enclosed in hollow………… structure coleoptile

A

Leaf primordia
Foliar

41
Q

In non albuminous seeds endosperm is completely used up:
Examples of such seeds

A

Pea
groundnut
beans

42
Q

Albuminous seeds retain part of endosperm
Examples 5

A

Wheat
Maize
Barley
Castor
Coconut

43
Q

Residual persistent nucellus is termed as ………… And is present in……/…….

A

Perisperm
Black pepper
Beet

44
Q

As seed matures its water content is reduced and seed becomes relatively dry I.e……

A

10 to 15% moisture by mass

45
Q

As seed matures general metabolic activity of embryo increase rapidly
True or false

A

False It slows down

46
Q

In some fruits………. Also contribute to formation of fruit. Such fruit is called false fruit. It is found in……/……/……

A

Thalamus
Apple
Cashew nuts
Strawberry

47
Q

In some fruits………. Also contribute to formation of fruit. Such fruit is called false fruit. It is found in……/……/……

A

Thalamus
Apple
Cashew nuts
Strawberry

48
Q

Parthenocarpy can be induced by application of ……….. hormones such as ……/……

A

Growth hormones
Auxins and giberallic acid

49
Q

………… and ………… of the mature seeds are crucial for storage of seeds

A

Dehydration and dormancy

50
Q

Lupinus arcticus excavated from……………. germinated and flowered after ……… years

A

Arctic tundra
10000

51
Q

Phoenix dactylifera discovered at king ……….. near……… was viable after ………

A

Herods palace
Dead Sea
2000 years

52
Q

……….. and ………. Have evolved special mechanism to produce seeds without fertilisation called…………

A

Astereaceae and grasses
Apomixis

53
Q

Apomixis is form of…….. reproduction that mimics……….. reproduction

A

Asexual
Sexual

54
Q

In ……/……. some nucellar cells divide and protrude into the embryo sac and develop into embryo.

A

Citrus and mango varieties

55
Q

Parasite plant species

A

Orobranche grasses

56
Q

Multicarpelary syncarpous ovary found in……./……/……

A

Mustard
Tomato
Papaver

57
Q

Multicarpelary apocarpous ovary found in……../……/……

A

Lotus
Rose
Michellia

NEET BIOLOGY (13 decks)

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