Topic 1 - (photosynthesis) Flashcards
What do plants need in order to survive?
Water Light Space Reproduction Air CO2 Heat Nutrients
What are the 3 steps to plant fertilisation?
1) the stigma secretes a sugary substance to attract pollen
2) The pollen tube grows through the style carrying the pollen
3) The pollen and the ovule meet
What are some features of an insect pollinated plant?
- brightly coloured
- strongly scented
- sticky pollen grains
What are some features of an wind pollinated plant?
- large and feathery stigmas
- no scent
- dull colour
- no nectar
- lots of pollen grains
What is the more successful method of pollination? Insect or wind?
Insect
What are some methods of seed dispersal?
- wind
- water
- animal skin/fur
- birds eating seed
What is germination?
The process where a plant emerges from a seed
what is equation of photosynthesis?
Water + carbon dioxide + light energy - glucose + oxygen
What is photosynthesis?
A chemical reaction in the chloroplasts which uses light energy to convert water and carbon dioxide into glucose and oxygen.
Where in a leaf is glucose stored?
The starch
What are the 4 things needed for photosynthesis?
1) sunlight
2) chlorophyll
3) water
4) CO2
How are leaves adapted for photosynthesis? Give 3 reasons:
- they have a large surface area for absorbing light
- the underside of the leaf is covered in stomata which allow the diffusion of gases
- contain many chloroplasts in the palisade layer which trap light for photosynthesis
What are the functions of the XYLEM and PHLOEM?
Xylem - tubes in a plant that carry water from the roots to the leaves
Phloem- tubes in a plant that transport sugars around the plant
What is the stamen?
Male parts of a flower
What is the anther?
Produces the the male sex cells and is held up by the filament
