sexual reproduction in flowring plants

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71 Terms

1

non albuminous or ex albuminous

pea , groundnut

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2

albuminous seed

castor, wheat, maize, barley

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3

perispermous seed

beet, blackpepper

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4

the pollen tube releases the tow male gametes into

cytoplasm of synergids

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5

polar nuclei are situated _______ the egg apparatus in the large central cell

below

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6

multicarpellary syncarpous ovary

papaever

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7

multicarpellary apocarpous ovary

michellia

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8

The microsporangia develop further and become

pollen sacs

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9

It nourishes the developing pollen grains possess dense cytoplasm and generally have more than one nucleus

tapetum

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10

When the anther is young, a group of compactly arranged homogenous cells called the______ occupies the centre of each microsporangium.

sporogenous tissue

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11

Pollen grains are generally spherical measuring about______ in diameter

25-50μm

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12

Pollen grains are generally spherical measuring about______ in radius

12.5-25μm

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13
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14

It is a thin and continuous layer made up of cellulose and pectin.

intine

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15

which cell of pollen grain has abundant food reserve and irregularly shaped nucleus

vegetative cell

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16

which cell of pollen grain has spindle cell and nucleus and dense cytoplasm

generative cell

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17

came into India as a contaminant with imported wheat, has become ubiquitous in occurrence and causes pollen allergy

parthenium

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18

some cereals such as rice and wheat, pollen grains lose viability within

30 minutes

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19

3 families whose pollen viability remains for months

Rosaceae, Leguminoseae and Solanaceae

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20

The body of the ovule fuses with funicle in the region called

hilum

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21

_____represents the junction between ovule and funicle.

hilum

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22

Ovules generally differentiate a single megaspore mother cell (MMC) in the_____ region

micropyle

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23

Integuments encircle the nucellus except at the tip where a small opening called the

micropyle

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24
<p>what does this diagram represents</p>

what does this diagram represents

megaspore dyad

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25

This method of embryo sac formation from a single megaspore is termed

monosporic development

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26

no of mitosis required to form embryo sac

3

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27

no of cells in embryo sac

7

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28

no of nucleus in embryo sac

8

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29

common pancy aka

viola

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30

plants which produce two type of flower

oxalis, viola, commelina

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31

Only a small proportion of plants use

abiotic agents

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32

Pollination by ____ is more common amongst abiotic pollinations

wind

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33

Wind-pollination is quite common in

grasses

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34

Pollination by water is quite rare in flowering plants and is limited to about ____
genera

30

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35

pollination by water is mostly seen in

monocots

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36

water pollinated freshwater plants

vallisneria and hydrilla

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37

marine plants which is pollinated by water

zostera

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38

plants pollinated by water

Vallisneria, Hydrilla, Zostera, sea grass

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39

Pollen grains in many such species are long, ribbon like, mucilaginous, and they are carried passively

water pollinated

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40

pollen grains are light and non-sticky ,They often possess well-exposed stamens so that the pollens are easily dispersed

wind pollinated

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41

dominant biotic pollinating agent

bees

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42

flowers are large, colourful, fragrant and rich in nectar. When the flowers are small, a number of flowers are clustered into an inflorescence to make them conspicuous.

insect pollinated

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43

The flowers pollinated by _____ and ____ secrete foul odours to attract these
animals.

flies and beetles

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44

In some species floral rewards are in providing safe places to lay eggs; an example

amorphophallus

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45

a simple relationship between ____ and ____ in which they can’t complete their life cycle without each other

yucca and moth

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46
<p>the diagram shows pollination in </p>

the diagram shows pollination in

vallisneria

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47

Continued self-pollination result in

inbreeding depression

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48

Majority of flowering plants produce

hermaphrodite

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49

If both male and female flowers are present on the same plant

monoecious

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50

ex of monoecious

castor and maize

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51

male and female flowers are present on different plants, that is each plant is either male or female

dioecious

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52

ex of dioecious

papaya

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53
<p>what does this image describe</p>

what does this image describe

Pollen tubes growing through the style

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54

All these events–from pollen deposition on the stigma until pollen tubes enter the ovule–are
together referred to as

pollen pistil interaction

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55

which event is unique to flowering plants.

double fertilisation

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56

The central cell after triple fusion becomes the

primary endosperm cell

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57

The coconut water from tender coconut that you are familiar with, is
nothing but

free-nuclear endosperm

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58

the surrounding white kernel of coconut is the

cellular endosperm

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59

The zygote gives rise to the

proembryo

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60

correct order

zygote → proembryo → globular embryo → heart shaped embryo → mature embryo

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61

incorrect order

zygote → proembryo → heart shaped embryo → globular embryo → mature embryo

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62

in monocots the reduced cotyledon is known as

epiblast

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63

In the grass family the cotyledon is called

scutellum

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64
<p>what does the encircled part represents</p>

what does the encircled part represents

scutellum

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65

______and ______ of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season

Dehydration and dormancy

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66

discovered during the archaeological excavation at King Herod’s palace near the Dead Sea

Phoenix dactylifera

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67

The seed germinated and flowered after an estimated record of 10,000 years of dormancy and was found in Arctic tundra

Lupinus arcticus

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68

a few flowering plants such as some species of _____and ______ , have evolved a
special mechanism, to produce seeds without fertilisation, called apomixis.

Asteraceae and grasses

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69

form of asexual reproduction that mimics sexual reproduction

apomixis.

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70

Occurrence of more than one embryo in a seed is referred to as

polyembryony

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71

ex of polyembryony

Citrus and Mango

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