Unit 7 - Fertilisation, seeds and fruit

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Fertilisation, seeds and fruit

Unit 7 basics 3 + 4

Petal fusion yes of no?

What is fertilisation?

Learning objectives

• You must be able to describe the fertilisation process in seed plants.
• You must be able to describe the changes that take place in the ovary after fertilisation.

Fertilisation and Post-fertilisation Changes in the Flower | Don't Memorise

Fertilisation

• Pollination:  Transferring the pollen from a stamen to a stigma of a carpel.
• Fertilisation: The fusion of the nuclei of the male (gamete) sex cell and the female (gamete) sex cell.

Fertilization - Fruit & Seed Development

In what order does fertilisation happen?

1. Pollination -> Fertilisation -> Creation of the pollen tube
2. Pollination --> Creation of the pollen tube --> Fertilisation
3. Fertilisation --> Pollination --> Creation of the pollen tube
4. Fertilisation --> Creation of the pollen tube --> Pollination

Which part becomes fruit pulp after fertilisation

1. ovary
2. sepals
3. carpel
4. ovule

Has pollination and / or fertilisation happened here?

1. only pollination but no fertilisation
2. both pollination and fertilisation
3. only fertilisation, no pollination
4. no pollination and no fertilisation

What is fertilisation?

1. The release of the egg cell from the ovaries
2. The dividing of the zygote
3. Implantation of the zygote into the uterus wall
4. The union of an egg cell and sperm cell

An ovary of a certain flower contains six ovules. The egg cells of four of the ovules are fertilised; the egg cells of the other two remain unfertilised.
How many seeds will develop in this ovule?

1. 6
2. 4
3. 2
4. 0

A tulip grower wants to cultivate a new variety of tulip from two existing tulip varieties.

Will he use cross-pollination or self-pollination?

1. Cross-pollination
2. Self-pollination

Someone eats a handful of 18 peanut snacks. Each one contains a peanut. A peanut shell (the pod or fruit) usually has 2 peanuts.

How many ovules, ovaries and pollen grains were needed for this handful of peanuts?

Ovules

Ovaries

Pollen grains

18

9

18

Avocado come from
ovaries with...

1. a single ovule
2. multiple ovules

Apple come from
ovaries with...

1. a single ovule
2. multiple ovules

What is the name of the part of the flower that becomes the fruit pulp?

Learning objectives achieved?

• You must be able to describe the fertilisation process in seed plants.
• You must be able to describe the changes that take place in the ovary after fertilisation.

Next week

Last chance to ask questions for the minor test. So study for it: Unit 7 basics 1-4 and the bumble bee names (make and hand in your own determination key)

Starting with Unit 6 basics 1 and 2