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Biology > Sexual Reproduction In Flowering Plants > Flashcards

Sexual Reproduction In Flowering Plants Flashcards

Learn about gametes and sexual reproduction in angiosperms.

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AP® Biology flashcards Biology 101 flashcards
1
Q

The cell wall of pollen grain is called

A

Sporoderm

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2
Q

Plant causing pollen Allergy

A

Parthenium/carrot grass
Amaranthus
Chenopodium

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3
Q

Pollen viability in rice or wheat

A

30 minutes

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4
Q

Pollen banks

A

Storage of pollen grains for years in liquid nitrogen (-196°C) for later use in plant breeding programmes is called as cryopreservation. These centres for storage of pollens are called pollen banks.

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5
Q

Alpha cellulosic fibrous thickening is present in

A

Inner tangential wall of Endothecium

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6
Q

How many meiotic and mitotic division are required to form two male gamete from a PCM

A

1 Meiotic division

2 Mitotic division

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7
Q

Apocarpous ovary is found in

A

Michelia

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8
Q

Syncarpous ovary is found in

A

Papaver

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9
Q

Two celled stage of pollen grain is a result of

A

Asymmetric mitosis

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10
Q

Mature male gametophyte is how many celled

A

3 celled

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11
Q

The MMC undergoes meiosis and forms a linear tetrad of four haploid megaspore. Which end of the ovule has the functional megaspore?

A

Chalazal end

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12
Q

What is the location of nucleus and vacuole of egg cell and synergids respectively?

A

The egg cell has a micropylar vacuole and chalazal nucleus.

Synergids have micropylar nucleus and chalazal vacuole.

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13
Q

Orthotropous ovule

A

The micropyle, chalaza and funicle are in straight line. This is the most primitive type of ovule.
Eg, piper
Polygonum
Cycus

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14
Q

Anatropous ovule

A

The ovule turns at 180° angle. Thus it is inverted ovule. Micropyle lies close to hilum or at side of hilum.
Eg, it is most common ovule and found in 82% of angiosperm family.

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15
Q

Hemianatropous ovule

A

Ovule turns at 90° angle upon the funicle or body of ovule is at right angle to the funicle.
Eg, Ranunculus

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16
Q

Campylotropous ovule

A

Ovule is curved more or less at right angle to funicle. Micropylar end is bent down slightly
Eg, in members of leguminosae, cruciferae

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17
Q

Amphitropous ovule

A

Ovule as well as embryo sac is curved like horse shoe
Eg, lamna
Poppy
Alisma

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18
Q

Circinotropous ovule

A

The ovule turns at more than 360° angle, so funicle become coiled around the ovule.
Eg, opuntia (cactaceae)
Plumbaginaceae

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19
Q

The vegetative cell of the embryo sac is

A

Antipodal cells

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20
Q

Integumented megasporangium is also called as

A

Ovule

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21
Q

Male gametophyte and female gametophyte are

A

Pollen grains and embryo sac respectively

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22
Q

Name some plants that produce both chasmogamous and cleistogamous flowers

A

Viola (common pansy)
Oxalis
Commalina

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23
Q

Anemophily

A 
Wind pollination
#  pollen grains are light and non-sticky. 
# flowers have well exposed stamens. 
# flowers have large feathery stigma. 
# flowers packed into inflorescence.
Eg,common in grasses
        maize
       Wheat
        Sugarcane
         Bamboo
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24
Q

Hydrophily

A

Water pollination

# light, unwettable pollen grains, surrounded by mucilagenous covering. 
# long, sticky, unwettable stigma.

Eg, fresh water plants like vallisneria, hydrilla
Marine water plant like zostera.

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25
Q

Epihydrophily

A

Pollination on the surface of water.
Eg, vallisneria

# female flower have very long pedicel, therefore it reaches the surface of water. 
# male flower after breakage floats on the surface of water. 
# pollen grains are released on the surfave of water and reach to the stigma.
26
Q

Hypohydrophily

A

Beneath the surface of water.
Eg, zostera

female flowers are remain submerged in water. Pollen grains are ribbon like and they are carried passively inside water to the stigma.

27
Q

Which aquatic plants have their flowers emerge above the level of water and are pollinated by insects or wind.

A

Water hyacinth

Water lily

28
Q

Pollen robbers

A

Queen of Bombus affinis perforate Aquiligia spurs and steal nectar.

29
Q

Ornithophily

A

Bird pollination

30
Q

Chiropterophily

A

Bats pollination

31
Q

Malacophily

A

Snails pollination

32
Q

Ophiophily

A

Snakes pollination

33
Q

Ploidy of polygonum type embryo sac is

A

Haploid

34
Q

Female flowers remains submerged in water and pollen grains are released inside water in

A

Sea grasses

35
Q

Epihydrophily is found in

A

Tape grass

36
Q

Which plant provide safe place to insects for laying eggs?

A

Amorphophallus

37
Q

Pollination occurs by pseudocopulation mechanism in

A

Ophrys

38
Q

Lemur,a large animal, acts as pollinator in

A

Ravenela

39
Q

Pollination present in santalum is

A

Ophiophily

40
Q

Triple fusion and double fertilization was discovered by

A

S G Nawaschin

41
Q

The starchy endosperm is present in

A

Rice and wheat

42
Q

The proteinaceous endosperm is present in

A

Maize

43
Q

The oily endosperm is present in

A

Castor and coconut

44
Q

The cellulosic endosperm is present in

A

Ivory palm

45
Q

The hemicellulosic endosperm is present in

A

Date palm

46
Q

The stony endosperm is present in

A 
Betel nut(Areca nut) 
Date palm (Phoenix dactylifera)
47
Q

Diploid endosperm is found in

A

Oenothera

48
Q

Large suspensor cell are prensent towars which region of zygote

A

Micropyle

49
Q

The first cell of suspensor (towards microphyle) is large and called as

A

Haustorium or vesicular cell

50
Q

The last cell of the suspensor towards embryo cell is

A

Hypophysis

51
Q

A single cotyledon is called

A

Scutellum

52
Q

Covering of radicle and root cap is

A

Coleorhiza

53
Q

Covering of shoot apex and few leaf primordia is called

A

Coleoptile

54
Q

The remains of second cotyledon in some grasses is called

A

Epiblast

55
Q

Why micropyle is remains as a small pore in the seed coat?

A

This facilitates entry of 0xygen and water into the seed during germination.

56
Q

Form of asexual reproduction that mimics sexual reproduction is

A

Apomixis

57
Q

Double fertilization was discovered by Nawaschin and Guignard in

A

Lilium and Fritillaria

58
Q

Seeds of which plant was discovered during the archaeological excavation of king Herod’s palace near Dead sea?

A

A 2000 yrs old viable seed of date palm, Phoenix dactylifera was found.

59
Q

The nucellar embryos are apomictic embryos, developed by

A

Sporophytic budding

60
Q

The pollen viability period of rice and pea respectively is

A

30 minutes and several months

61
Q

Semelparous organisms

A

Organism reproduces only once in their lifetime, such as annual plants(including all grain crops) and certain species of salmon, spiders, bamboos and century plants. Ofter, they die shortly after reproduction.

62
Q

Iteroparous organisms

A

Organisms which produce offsprings in successive (eg., annual and seasonal)cycles, such as perennial plants. Iteroparous animals survive over multiple seasons(or periodic conditions changes).

Biology (5 decks)

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