Sexual Reproduction

Question 1

how many phases do plants exhibit?

Answer 1

3 (vegetative,reproductive,senescent)

Question 2

what is the phase of maturity?

Answer 2

vegetative phase/juvenile phase

Question 3

the phase after vegetative is?

Answer 3

reproductive

Question 4

in what plants can the phases be differentiated?

Answer 4

annuals and biennials

Question 5

in what plants can the phases not be differentiated?

Answer 5

perennials

Question 6

plants that flower more than once are?

Answer 6

polycarpic

Question 7

plants that flower only once in their lifetime are?

Answer 7

monocarpic

Question 8

examples of annuals are?

Answer 8

rice,wheat,maize etc

Question 9

examples of biennials are?

Answer 9

mango,neem,nerium etc

Question 10

examples of perennials are?

Answer 10

bamboo,agave americana,strombilanthus kuntiana

Question 11

strombilanthus is also called as?

Answer 11

neelakuranji

Question 12

neelakuranji flowers every?

Answer 12

12 years between sept-oct

Question 13

bamboo flowers after?

Answer 13

50-100 years

Question 14

agave flowers after?

Answer 14

10-30 years

Question 15

events of sexual reproduction are?

Answer 15

pre-fertilization,fertilization,post-fertilization

Question 16

pre-fertilization includes?

Answer 16

gametogenesis and gamete transfer

Question 17

define gametogenesis

Answer 17

the formation of male and female gametes

Question 18

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

Answer 18

homogametes/isogametes

Question 19

gametes that can distinguished into male and female are?

Answer 19

heterogametes

Question 20

what is the male gamete called?

Answer 20

antherozoid

Question 21

examples of homogametes?

Answer 21

cladophora,spirogyra,ulothrix

Question 22

examples of heterogametes are?

Answer 22

volvox,pteris,sycas,fucas,eudorina

Question 23

what is monecious?

Answer 23

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

Question 24

An example of a monecious alga?

Answer 24

chara

Question 25

examples of angiosperms with monecious condition

Answer 25

maize,cuccurbits,coconut

Question 26

what is dioecious?

Answer 26

male and female gametes are borne in different individuals

Question 27

A bryophyte with dioecious condition?

Answer 27

marchantia

Question 28

examples of angiosperms with diocious condition

Answer 28

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

Question 29

examples of bisexual organisms

Answer 29

sponges,earthworm,leech

Question 30

haploid parents produce gametes by which division?

Answer 30

mitotic division (bryophytes and thallophytes)

Question 31

what are the specialized cells in diploid parent?

Answer 31

meiocytes

Question 32

what division do meiocytes undergo to produce haploid gametes?

Answer 32

meiosis

Question 33

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

Answer 33

water

Question 34

example of an algae in which both gametes are motile?

Answer 34

cladophora

Question 35

parental body is haploid in?

Answer 35

fungi,monera,algae and bryophytes

Question 36

parental body is diploid in?

Answer 36

pteridophytes,gymnosperms,angiosperms and humans

Question 37

haploid gametes divide by which in thallophytes and bryophytes?

Answer 37

mitotic division

Question 38

diploid parents produce gametes by which division?

Answer 38

meiosis

Question 39

haploid parents produce gametes by which division?

Answer 39

mitotic

Question 40

fusion of male and female gamete is?

Answer 40

syngamy

Question 41

internal fertilisation can be seen in?

Answer 41

fungi,bryophytes,,pteridophytes,phanerogams

Question 42

what is Haplotonic life cycle?

Answer 42

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

Question 43

what is blastogenesis?

Answer 43

development of new individuals from buds or fragments

Question 44

during embryogenesis what does zygote undergo?

Answer 44

mitosis and cell differentiation

Question 45

what are the three types parthenocarpy?

Answer 45

genetic parthenocarpy,chemical induced,environmental

Question 46

what is chemical induced partheno. and its examples?

Answer 46

when auxins and giberellins are induced ex - grapes

Question 47

environ. parth and examples

Answer 47

when the environment affects the parthenocarpy ex - capsicum and peas

Question 48

genetic parth. and examples

Answer 48

formed by hybridization or mutations ex - orange

Question 49

what is zooidogamy?

Answer 49

fusion motile male gamete and large non motile female gamete

Question 50

zooidogamy can be seen in?

Answer 50

bryophytes,pteridophytes and algae

Question 51

what is siphonogamy?

Answer 51

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

Question 52

siphonogamy can be seen in?

Answer 52

angiosperms and gymnosperms