Chapter 42- Flower Structure Flashcards Preview

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Flashcards in Chapter 42- Flower Structure Deck (19):
1

what is the calyx of a flower

region consisting of flattened sepals (green leaves)

2

what is the corolla of a flower

region made of petals

3

what is the androecium

collective term for stamens
-stamen consists of filament and an anther

4

what is the gynoecium

collective term for carpels

5

what does the carpel consist of

ovary, style, and stigma
-ovules produced in ovary
-one ovum produced per ovule

6

how does pollen form

anthers contain 4 microsporangia which produce microspore mother cells (2N)
-2N microspore mother cells produce 1N microspores through meiosis
-1N microspore develops by mitosis into 1N pollen

7

how many megaspores does the mother cell ovule produce

4 1N megaspores after meiosis

8

how many mitotic divisions does the surviving megaspore produce

8 haploid nuclei from mitotic divisions

9

what is self pollination

pollen from a flower's anther pollinates stigma of the same flower

10

how have flowers evolved with pollinators

they have coevolved to help successfully attract pollinators to their flowers

11

what are 3 evolutions of flowers to attract pollinators

color changes fro bees
-landing platforms for butterflies
-large amounts of nectar for birds

12

what are 2 advantages of self fertilization

favorable in stable environments
offspring are more uniform and probably better adapted to their current environment

13

What are dioecious plants

produce only ovules or pollen, promotes cross pollination

14

what are monoecious plants

produce male and female flowers on the same plant

15

what is self incompatibility

when flowers prevent themselves from self fertilizing (mono and dioecious plants)

16

what is double fertilization

only in agiosperms
-results in fertilization of egg
-formation of endosperm that nourishes the embryo

17

what is asexual reproduction in angiosperms

produces genetically identical individuals because only mitosis occurs
-more common in harsh environments
--all clones are adapted

18

what are some plant parts involved in asexual reproduction

runners or stolons
-rhizomes
-suckers

19

which plants live longer, woody or herbaceous?

woody plants