Multicultural organisms Flashcards
State the uses of different plants.
Oils Wood- chairs Perfumes Medicine Converts CO2 into O2 Decoration Food - animals/ humans Make up products Bio fuel
Petal
to attract specific pollinators to the flower.
Stamen
The male parts of the flower
Sepal
Protect the unopened flower
Ovary
Produces the female sex cells (contained in the ovules)
Stigma
The top of the female part of the flower which collects pollen grains
Anther
Produce male sex cells (pollen grains)
Nectary
Produce a sugary solution called nectar, which attracts insects
Style
the tube-like structure that holds up the stigma.
Ovule
the organ that forms the seeds of flowering plants.
Filament
The filament holds the anther up
Describe the steps in pollination
After pollen has landed on the stigma, it grows a pollen tube down through the style to the ovary.
Describe the differences in appearance a number of sex has produced between insect and wind pollinated plants.
Insect pollinated plants are large and brightly coloured to attract insects and they usually are scented with nectar there pollen grains are moderate And the pollen is sticky or spiky anthers are inside of the flower and so is the stigma in Wind pollinated plants the petals are often small dull colours like green or brown there’s no sent to the flowers the number of pollen produced are very large amount of pollen grains are smooth and light the anthers are outside of the flowers and so is the stigma.
Describe the steps in fertilisation
plant fertilization is the joining of male and female sex cell, resulting in a zygote.
Embryo
Becomes plant
Seed coat
Protects the seed
Food store
Provides food for growth
Name the methods of seed dispersal
The most common methods are wind, water, animals.
State what dormancy is
Seed dormancy is the state in which the seed is unstable to Germinate during unsuitable ecological conditions that would typically lead to a low ability of seeds survival
Explain the requirements for germination to occur
Warmth
Oxygen
Water
(Wow)
Describe and identify different methods of asexual reproduction in plants
In asexual reproduction only one plant is needed
all offspring produced by asexual reproduction are genetically identical making them clones of their parent plant
by taking cuttings the new plants are genetically identical to the parent plant this is a fast and cheap way to create new plants
Describe an experiment into the Requirements for photosynthesis and understand the design features of the experiment
Light as a limiting factor
Aim to find out what happens to the rate of photosynthesis when the light is a limiting factor
method I have a light source
algal balls in solution
you have to wait for 30 minutes for colours are changing record from distance
from the light 6 cm 25 cm and 50 cm
From 6 cm the colour after 30 minutes was dark red 25 was a reddish yellow and 50 was yellow
Describe an experiment into the requirements for germination and understand the design features of the experiment
Aim to find out how temperature affects seed germination three petri dishes filter paper 5 ml of water and 30 crest seeds divided equally in each dish
One dish goes into an area 5°C another dish goes into an area of 20°C and the last dish goes into an area where it’s 40°C the best growth was in 40°C and the conclusion the higher the temperature the more germination takes place
Describe the two stages of photosynthesis
Look at sheet of paper
