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Botany - Sexual Reproduction > Sexual Reproduction > Flashcards

Sexual Reproduction Flashcards

1
Q

how many phases do plants exhibit?

A

3 (vegetative,reproductive,senescent)

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2
Q

what is the phase of maturity?

A

vegetative phase/juvenile phase

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3
Q

the phase after vegetative is?

A

reproductive

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4
Q

in what plants can the phases be differentiated?

A

annuals and biennials

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5
Q

in what plants can the phases not be differentiated?

A

perennials

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6
Q

plants that flower more than once are?

A

polycarpic

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7
Q

plants that flower only once in their lifetime are?

A

monocarpic

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8
Q

examples of annuals are?

A

rice,wheat,maize etc

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9
Q

examples of biennials are?

A

mango,neem,nerium etc

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10
Q

examples of perennials are?

A

bamboo,agave americana,strombilanthus kuntiana

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11
Q

strombilanthus is also called as?

A

neelakuranji

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12
Q

neelakuranji flowers every?

A

12 years between sept-oct

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13
Q

bamboo flowers after?

A

50-100 years

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14
Q

agave flowers after?

A

10-30 years

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15
Q

events of sexual reproduction are?

A

pre-fertilization,fertilization,post-fertilization

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16
Q

pre-fertilization includes?

A

gametogenesis and gamete transfer

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17
Q

define gametogenesis

A

the formation of male and female gametes

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18
Q

gametes that appear similar and cannot be distinguished into male or female are?

A

homogametes/isogametes

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19
Q

gametes that can distinguished into male and female are?

A

heterogametes

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20
Q

what is the male gamete called?

A

antherozoid

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21
Q

examples of homogametes?

A

cladophora,spirogyra,ulothrix

22
Q

examples of heterogametes are?

A

volvox,pteris,sycas,fucas,eudorina

23
Q

what is monecious?

A

when both the male and the female gamete are found in the same organism

24
Q

An example of a monecious alga?

A

chara

25
Q

examples of angiosperms with monecious condition

A

maize,cuccurbits,coconut

26
Q

what is dioecious?

A

male and female gametes are borne in different individuals

27
Q

A bryophyte with dioecious condition?

A

marchantia

28
Q

examples of angiosperms with diocious condition

A

date palm (phoenix),eel grass (valisneria),carica papaya

29
Q

examples of bisexual organisms

A

sponges,earthworm,leech

30
Q

haploid parents produce gametes by which division?

A

mitotic division (bryophytes and thallophytes)

31
Q

what are the specialized cells in diploid parent?

A

meiocytes

32
Q

what division do meiocytes undergo to produce haploid gametes?

A

meiosis

33
Q

what is the medium of gamete transfer in algae,bryophytes and pteridophytes?

A

water

34
Q

example of an algae in which both gametes are motile?

A

cladophora

35
Q

parental body is haploid in?

A

fungi,monera,algae and bryophytes

36
Q

parental body is diploid in?

A

pteridophytes,gymnosperms,angiosperms and humans

37
Q

haploid gametes divide by which in thallophytes and bryophytes?

A

mitotic division

38
Q

diploid parents produce gametes by which division?

A

meiosis

39
Q

haploid parents produce gametes by which division?

A

mitotic

40
Q

fusion of male and female gamete is?

A

syngamy

41
Q

internal fertilisation can be seen in?

A

fungi,bryophytes,,pteridophytes,phanerogams

42
Q

what is Haplotonic life cycle?

A

seen in alga (zygote divides into haploid spores which grow into haploid individuals)

43
Q

what is blastogenesis?

A

development of new individuals from buds or fragments

44
Q

during embryogenesis what does zygote undergo?

A

mitosis and cell differentiation

45
Q

what are the three types parthenocarpy?

A

genetic parthenocarpy,chemical induced,environmental

46
Q

what is chemical induced partheno. and its examples?

A

when auxins and giberellins are induced ex - grapes

47
Q

environ. parth and examples

A

when the environment affects the parthenocarpy ex - capsicum and peas

48
Q

genetic parth. and examples

A

formed by hybridization or mutations ex - orange

49
Q

what is zooidogamy?

A

fusion motile male gamete and large non motile female gamete

50
Q

zooidogamy can be seen in?

A

bryophytes,pteridophytes and algae

51
Q

what is siphonogamy?

A

fusion on motile male gamete by pollen tube and large non motile female gamete

52
Q

siphonogamy can be seen in?

A

angiosperms and gymnosperms

Botany - Sexual Reproduction (1 decks)

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