Flashcards in topic 6 Deck (39):
what is the equation for photosynthesis
carbon dioxide (6C02) + water (H20) = glucose (C6H12O3) +oxygen (02)
name 2 photosynthetic organisms
green plants, algae,
Photosynthesis uses energy from the sun to make what?
what happens to the energy stored in a plants biomass?
it is transferred to another organism when the plant is eaten and so on along the food chin meaning photosynthetic organisms give life to most animals.
what are chloroplasts?
they are the sight of photosynthesis they contain chlorophyll which absorbs light.
how is energy transferred to the chloroplasts?
what type of reaction is photosynthesis?
name the 3 factors that have an effect on the rate of reaction in photosynthesis
light intensity, concentration of CO2, temporature
name a plant that can be used to investigate the effect of light intensity on the rate of photosynthesis.
what apparatus would you need to conduct the effect of light intensity on the rate of photosynthesis test.
gas syringe tight source, ruler, water and sodium hydrogencarbonate, conical flask and bung
at what temperature do the enzymes denature in photosynthesis?
what is a root hair cell?
a cell that grows on the surface of a plant
what do root hair cells do?
the enlarge the surface area of a plant so it can absorb water and mineral's
how do root hair cells abosorb water?
how do root hair cells absorbe minerals
active transport because the concentration of minerals is higher in the soil than the plant
what are phloem tubes used for?
what are phloem tubes made from?
columns of elongated living cells with small pores
what is the main food substance moved around by the phloem?
what is the process of movement in the phloem called?
translocation it requires energy from resperation
what does the xylem do?
takes water and minerals up
what is the xylem made from
what is the xylem strengthend by
what is transportation caused by
what are the stomata used for?
where are the stomata Found
lower side of the leaf
what do stomata let through?
CO2 Oxygen and water vapour
what opens and sits the stomata?
name the 3 factors that effect transportation
how do you estimate transpireatation rate
with a photometer
where dose transpireatation take place
in the leaves
trainspireation is____________'in a plant
the translocation streme carries what?
mineral Ions and water
name 6 ways in which the leaf is adapted for photosynthesis and gas exchange
1 broad leaves
2 palisade layer has lots of chloroplasts
3 upper endermis is transparent
4xylem and phloem
5 covers in a waxy cuticle
6 tissues of leaves adapted for gas exchange
name 6 ways plants are adapted to extreme environments
thick stem stores water
stomata in sunken pits
what are auxins?
plant growth hormones
what does positively phototrophic mean?
Graeme towards light ( shoots)
what does positively gravitrophic mean
grows with gravity roots
how do auxins make a plant grow
towards the light