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Flashcards in Flower Prac Deck (31):
1

What are angiosperms?

Seed-bearing plants that produce flowers

2

The seeds which contain plant embryo are produced in the _____.

Flower

3

All the parts of a flower are actually modified leaves that are ______for their roles in the ______ process.

Specialized
Reproductive

4

Flower parts are arranged in circles called _____.

Whorls

5

What is the base of the flower called?

Receptacle

6

What two groups can flower structures be divided into?

Essential organs and accessory organs

7

The essential organs are the ______ structures which include ____ (male) and ______ (female).

Reproductive
Stamen
Pistil

8

The accessory organs are the _____ and _____ which surround and protect essential organs.

Sepals
Petals

9

The stamen is the male reproductive organ and consists of 2 parts the ____ and _____.

Filament
Anther

10

What is an anther?

Enlarged structure at the top of the stamen.

11

What is inside the anther?

Pollen sacs

12

What do pollen sacs produce?

Pollen grains

13

How many sperm does each pollen grain contain?

2

14

What happens when pollen grains mature?

The pollen sacs split open to release dust like pollen.

15

What is the filament?

Thin stalk that supports the anther.

16

What is the pistil?

Female reproductive organ

17

What 3 parts does the pistil consist of?

Stigma
Style
Ovary

18

What is the stigma?

An enlarged portion at the top of the pistil that becomes moist and sticky when mature.

19

What is the style?

Middle portion of the pistil, it is long and slender and sometimes Absent.

20

What is the ovary?

The enlarged structure at the bottom at the bottom of the pistil.

21

What are locules?

Hollow compartments in the ovary.

22

What does each locule contain?

Ovules

23

What does each ovule contain?

Ova (eggs)

24

Some flowers have all male or all female parts and are called _____. Examples include _______,_______.

Imperfect
Pumpkin,melons

25

What re perfect flowers?

Flowers that have both male and female flowers.

26

-Pollination occurs when pollen grains land on the sticky surface of the _______ and are trapped there.
-The pollen grains _______ and a pollen tube emerges from the grain.
-The pollen tubes grows down the _____ to the ovary and enters the ovule, making a continuous passageway for sperm to enter to the ovum.
-Fertilization occurs when the ____ join the _____.

Stigma
Germinates
Style
Sperm
Eggs

27

After pollination
The fertilized egg becomes an ____. The wall of the ovule thickens an forms a _____, thus enclosing and protecting the embryo. The ovule wall thickens and develops into a ______.(In some plants such as apples, the ovary walls become fleshy and contain sugars and starches, in other plants such as walnuts the ovary walls become dry and hard.)

Embryo
Seed
Fruit

28

What are sepals?

The outermost Whorl of the flower, they are leaf like and usually green in color.

29

What do sepals do?

Protect the inner part of the flower during the budding stage.

30

What are petals?

Directly beneath the sepals and largest part of the flower.

31

What is the function of the petals?

Their color and odor attract pollinators to the flower for pollination.