Plant structures
Name the 4 main organs of a plant
Leaf, root, stem, flower
What is the equation for photosynthesis
Carbon dioxide + water --> glucose + oxygen
Osmosis
Name one way an insect pollinated plants attracts pollinators
colour/smells/nectar
Name 1 way a seed is dispersed
Wind/animal/water/self
Describe how a plant root hair cell is adapted for its role
Larger surface area
Name 2 uses for glucose
Respiration to release energy (and everything energy is for, growth, movement etc)
Stored as starch
Used to make cellulose (what cell walls are made from)
When does diffusion stop?
When equilibrium is reached
What part of the flower produces pollen
Anther
Why do seeds need to disperse?
What is the name of the hole on the underside of leaves called?
Stomata
Describe a test to prove that a leaf has photosynthesized
Iodine test - boil in ethanol, add iodine, should go blue-black
Explain how the products and reactants of photosynthesis move by diffusion and osmosis
Water moves via osmosis into the root hair cells/xylem
Carbon dioxide via diffusion into stomata\
Glucose by diffusion into palisade cells vacuole/through phloem
oxygen by diffusion out of stomata
Name 1 way a wind pollinated plant is different from an insect pollinated plant
Wind has lighter pollen/makes more pollen/no petals/anthers hang out of plant/stigma are feathery
What 3 things do you need for successful germination
Water, oxygen, warmth
Explain how palisade mesophyll cells are adapted for their role
Lots of chloroplasts for photosynthesis
What happen if i keep increasing the amount of light onto a tomato plant
The rate of photosynthesis would increase/would get more tomatoes and then it would stay the same/level off because something else becomes limiting
Define transpiration
The continuous loss water vapour from the stomata via evaporation
What is the difference between cross pollination and self pollination
Cross pollination same species but other plant, self is same plant
What is a radicle
it is the embryonic root
Compare 2 differences between xylem and phloem
Xylem - Dead, hollow, transports water, upwards only
Phloem - alive, has cytoplasm, transports sugars, up and down
If i had a plant underwater - describe a fair test to measure the rate of photosynthesis
Count the number of bubbles - repeat 5 times and get an average
Describe the 4 things that affect the rate of transpiration
Temperature, humidity, light, wind
Describe the changes to a flower after it has been fertilized
Pollen tube grows to ovary, pollen travels down tube and fuses with ovule, ovary becomes fruit, ovule becomes seeds
What is a micropyle
small pore that allows water to enter