Sexual reproduction / vegetative propagation in flowering plants

Question 1

What is asexual reproduction?

Answer 1

Asexual reproduction is when only one parent is involved.

Question 2

What is sexual reproduction?

Answer 2

Sexual preproduction is the fusion of two gametes.

Question 3

What is a gamete?

Answer 3

A gamete is haploid cells that can fuse together.

Question 4

What is the receptacle?

Answer 4

The receptacle forms the base of, and supports, the flower.

Question 5

What is the sepal?

Answer 5

The sepal is the part of the flower which protects the flower when it is a bud.

Question 6

What is the petal?

Answer 6

The petal is the part of the flower which attracts animals to it.

Question 7

What is the stamen?

Answer 7

The stamen consists of the anther and the filament, it’s the male part of the flower.

Question 8

What is the filament?

Answer 8

The filament is the part of the flower which supports the flower.

Question 9

What is the anther?

Answer 9

The anther is the part of the flower which produces pollen grains.

Question 10

What is the carpel?

Answer 10

The carpel is the part of the flower which contains the stigma, style and ovary. This is the female part of the flower.

Question 11

What is the stigma?

Answer 11

The stigma is the part of the flower which is sticky and pollen lands here.

Question 12

What is the style?

Answer 12

The style is the part of the flower in which the pollen tube grows (through the style).

Question 13

What is the ovary?

Answer 13

The ovary is the part of the flower which contains one or more ovules.

Question 14

How many pollen sacs does the anther contain?

Answer 14

4

Question 15

What are the four-layers of the pollen sac? what does each of them do?

Answer 15

• Pollen sac
• Tapetum - provides nutrients to pollen.
• Fibrous layer - for protection
• Epidermis - for protection.

Question 16

Is the Microspore Mother Cell (M.M.C):

• Haploid?
• Diploid?
• Triploid?

Answer 16

The microspore mother cell is a diploid (2n).

Question 17

Where are microspore mother cells found?

Answer 17

The M.M.C’s are found in the pollen sacs.

Question 18

How do M.M.C’s divide? What does this form?

Answer 18

M.M.C’s divide by meiosis to form a tetrad of haploid (n) cells.

Question 19

What happens to the tetrad after being formed by the M.M.C?

Answer 19

The tetrad separates, forming 4 haploid (n) cells, called the pollen grains or the microspore.

Question 20

What does each pollen grain form when it divides?

Answer 20

Each pollen grain has divided by mitosis, it forms a tube nucleus and a generative nucleus, which are both haploid.