plant nutrition

• four things that are needed for photosynthesis sunlight, water, chlorophyll and carbon dioxide
• male part of the flower is the anther and filament
• the female parts of the flower are stigma, style and ovary
• insects visit flowers to get food while they are there the pollen sticks to them when they travel to other flowers they carry pollen with them insect-pollinated flowers have a sticky stigma to pull the pollen of the insects they also have bright petals to attract insects
• wind pollination: the anthers of wind-pollination plants dangle outsode the flower this means the pollen gets blown off the anthers when the wind blows other flowers have a feathery stigma to catch the pollen as it blows past
• pollen lands on stigma with help from insects or the wind
• a pollen tube then grows out of pollen grain into the ovary
• the nucleus from a male sex cell inside the pollen grain moves down from the tube it joins with the nucleus of the female sex cell inside an ovule this is fertilisation
• after fertilisation the ovule develops into a seed