6.4 - Fruits and seeds

• Biologie
• Middelbare school
• havo
• Leerjaar 1

FLOWER

STEM

ROOT

FRUIT

LEAF

Perfect flower(s)

= both sexes per flower

Imperfect flower(s)

= one sex per flower

cross-pollination

self-pollination

male part

female part

carpel

stamen

Insect-pollinated flowers

Wind-pollinated flowers

The petals are coloured 

The petals are small and green

The flowers have nectar and are scented

The flowers don't have nectar

Pollen sacs are outside the flower

Pollen sacs are inside the flower

Stigma is usually inside the flower

Stigma is usually outside the flower

Stigma are feathery (=geveerde vorm)

pollen grains are rough and sticky

Pollen grains are smooth and light

1 till 8 :  succesful or unsuccesful pollination? 

Which numbers indicate unsuccesful pollination?

5 is from stigma to anther,  reversed

6 is from anther to anther

7 is from one species to another 

Put in the correct order

-->

Pollen grain

Fertilization

New germ (= plant embryo) now exists

Male dna reaches ovary

Pollination

New seed is made

Male dna reaches ovule

Pollen tube is formed

Drawing of a flower and Stamen & carpel (p. 224) + Hw

Tips aardappel PO van vorig jaar

+ Aantal goede onderzoeksvragen bedacht (bijv. effect van temperatuur, zonlicht, praten tegen plantje, type aardappel of water --> op groei van aardappelplant)

- Sommige leerlingen waren vergeten om goede hypothese en werkplan op te stellen. 

(Hypothese = verwachte uitkomst van onderzoek) 

(werkplan = gedetailleerd stappenplan met benodigdheden, hoe je het uitvoert en wat je uiteindelijk gaat meten om een conclusie te trekken. )

+ meeste mensen hebben goede observaties gedaan, netjes gemeten. 

- vaak vergeten om te beschrijven hoe het plantje eruit ziet (aantal blaadjes, kleur, harig, wortels, stengels/vertakkingen) 

- in sommige gevallen dubbele foto's van zelfde moment of andere manieren van fraude ('valsspelen') 

Drawing of a flower and Stamen & carpel (p. 224) + Hw

Basic 6.4 : Fruits and seeds

Which fruits do you know?

Summary

• Fertilezed egg cell -> plant embryo
• Ovule -> seed
• Ovary -> fruit
  

Seeds and fruits

What are you eating when
eating green peas?

1. Roots
2. Fruits
3. Seeds
4. Flowers

What fruits with
only one seed do you know?

fruits with one seed

Oaknut / acorn

Olive

Plum

Apricot

Avocado

fruits with multiple seeds

Apple

Grape

Paprika (bell-pepper)

Peanut

Strawberry

Melon

Fruits

Leaf

Stem

Root

parsnip

Asparagus

lettuce or andive 

Next lesson: dispersal of seeds

Basic 6.4 : Flowers become fruits

Read p. 183-185

excercises 1, 2, 4, 6-8   --->.  Draw practical 7  (page 228)

Basic 6.5 : Asexual reproduction 
(= cloning)

Work Potato research 

1. Read the assignment and rubric
   
2. Read basic 6.5 about asexual reprodcution -> write a summary of the text, this is your research introduction (think of adding an informative picture). Also look up more informtion, for instance about plant growth in the dark. 
   
3. Write a good research question (influence of X on potato offshoot growth) & hypothesis 
   
   
4. Use the provided the material and method from the assignment -> adjust it to your research

Quiet working time, only whispering