Flowers NGW

Question 1

Flowers have different shapes and sizes and there are many variations in colors, number of flower parts and the arrangement of these _____.

Answer 1

Parts

Question 2

Flowers are the _______ parts of plants which are responsible for the reproduction of gametes(_______ ______). Generally a flower consists of 4 _____ which are rings of leaves.

Answer 2

Reproductive
Sex cells
Whorls

Question 3

What are the four whorls?

Answer 3

Calyx
Corolla
Stamens
Pistils

Question 4

What does the 1st Whorl consist of?

Answer 4

Sepals

Question 5

The sepals may be _____ from each other in the same flowers of some plants or fused to form a ______ in flowers of other plants.

Answer 5

Free

Cup

Question 6

In wind pollinated plants sepals may be ____ or ____ in size.

Answer 6

Absent

Reduced

Question 7

What does the calyx do?(2)

Answer 7

Encloses and protects the inner whorls in the bud stage.

Sepals also contain chlorophyll so they can also synthesize food.

Question 8

What is the 2nd whorl called?

Answer 8

Corolla

Question 9

What are the two functions of the corolla?

Answer 9

• Brightly colored corolla Attracts agents of pollination such as insects and birds.
• encloses and protects the stamens and pistil

Question 10

Why is the corolla the most conspicuous part of the plant?

Answer 10

Because it is usually white/brightly colored.

Question 11

The whorl is made up of petals which are much larger than ______. The petals may be separate from each other or become partly _____.

Answer 11

Sepals

Fused

Question 12

What happens if the petals are completely fused?

Answer 12

They form a corolla tube

Question 13

What is the ‘Perianth’?

Answer 13

Collective name for the two outer whorls in dicotyledons(calyx;corolla)

Question 14

In monocotyledons the two whorls consist of ______ which are usually similar in ____,______ and _____.

Answer 14

Tepals
Size
Shape
Colour

Question 15

What is the 3rd Whorls?

Answer 15

The stamens

Question 16

Each stamen consists of an ______ and ______.

Answer 16

Anther

Filament

Question 17

What does the anther do?

Answer 17

Produces pollen grains which contain the male reproductive cells

Question 18

What does the filament do?

Answer 18

Bears and supports the anther in the most suitable position for pollen transfer to take place.

Question 19

What is the 4th Whorl?

Answer 19

The pistil

Question 20

What does the pistil consist of?

Answer 20

A basal
Swollen portion 
Ovary 
Style 
Stigma

Question 21

The ovary is a _____ cavity which contains the ovules. Each ovule has an ____.

Answer 21

Hollow

Egg

Question 22

The elongated style bears the stigma in the most suitable position for receiving _____ during _______.

Answer 22

Pollen

Pollination

Question 23

What does the sticky stigma do?

Answer 23

Receive or trap pollen grains