Science test review paper
1. Photosynthesis
. Photosynthesis is a Procedure where the production of water and glucose is
made by reacting Carbon dioxide and water, using the energy from the sun.
. Plants often change some of the glucose into starch for storage.
. Glucose is a type of sugar that belong to a group of chemicals known as
Carbohydrates.
2. Mineral salts for plants
. Fertilizers are substance that contain mineral salts that are use for making
plants grow stronger and healthy.
. Nitrate is a mineral salt that plants absorb through their roots and they are
needed so plants can make protein and chlorophyl. (Lack of nitrate makes
plants yellow instead of green.)
. Magnesium is a mineral salt that plants need to make chlorophyl. (Lack of
Chlorophyl makes plants leaves green.)
3. Plants and water
. Plants need water for support, cooling, transport and photosynthesis.
4. Pollination
. Pollination is the transfer of pollen from an anther to a stigma.
. There are 2 types of pollination which are cross pollination and selfpollination.
. The male gametes are in the pollen grains.
5. Fertilisation
. Fertilisation is when the male gamete and the nucleus of the female gamete
join together.
. Process of fertilisation is first the pollen grain lands on the stigma, then it
grows a tube down to the ovule and the male gamete (Nucleus) fuse with the
female Nucleus in a ovule, producing a zygon, then the zygote divides over
and over again to produce a embryo plant then the ovule becomes a seed.
6. Fruits
. The ovaries develop into fruits after fertilisation.
. Seeds dispersal helps to avoid competitions with parent plant.
7. Flowers
. Flowers are the reproductive organs of a plant.
. The female part of a flower are the style and stigma while for the male is the
stamen (Anther, Filament).
. Petals have bright colors and strong scent to attract insects and birds.
. Nectar is the sweet sugary substance that flowers produce.