Plant Nutrition Flashcards
Photosynthesis formula
6 CO2 + 6 H2O – (sunlight and chlorophyll) – C6H12O6 + 6 O2
Definition photos.
“process by which plants manufacture carbohydrates from raw materials with light energy”
What does chlorophyll do in photos.?
Trap sunlight energy and transfer it into chemical energy
Name the use of glucose that does not convert glucose into anything
Use for respiration in the mitochondria
What is glucose converted into for storage? Why?
Starch because as it is unreactive and insoluble, it is better for storage than glucose, which is very reactive .
Why is glucose used to make cellulose?
For the production of new cell walls
What two things are made with glucose that use ions, and what is their respective one?
Make proteins (nitrate ions) Make chlorophyll (magnesium ions)
What is glucose converted into for the transport of substances? Why?
Sucrose because it is unreactive, but soluble (good for transportation)
Name the benefits of the lamina
Broad and flat part to have a large surface area to trap sunlight
What adaptation of the leaf transports water and minerals?
Petiole / leaf stalk
What goes in through the stoma during the day?
CO2
What goes out of the stoma during the night?
CO2
Why do we test for starch?
To see if the plant made photos.
What liquid is used for the test in starch? Explain its colors
Iodine solution
Yes photos.= blue-black
No photos.= orange-brown
Why does the plant need to be destarched?
To make sure that all starch found was produced during the experiment
In what is the leaf boiled in testing for starch experiment? Why? (2 things)
Water: to break down cell membrane so that the iodine solution can reach the chloroplasts
Ethanol: to extract chlorophyll so that color change is seen
Why is the leaf put in water for the testing for starch?
To soften it
Name the steps of the testing for starch experiment
Destarch Dark 24hs Boil leaf in water Boli leaf in ethanol Put leaf in water Add iodine solution
Why do we test on variegated leaves?
To show that chlorophyll is necessary for photosynthesis
Why is a plastic bag wrapped in the plant pot in the CO2 necessity experiment?
So that CO2 does not appear from organisms in soil
What is soda lime used for in the CO2 necessity experiment?
To absorb CO2 that enters the jar
Why do we also use sodium hydroxide when we have soda lime in the CO2 necessity experiment?
To absorb CO2 done by respiration form the plant
Explain how do we show that light is necessary for photos.
Part of the plant is wrapped with a black/aluminum foil, which prevents light reaching, and then you leave it in the sun for some hours. Then, test for starch. The covered part did not do photos.
Think/draw small diagram of the “oxygen is produced on photos.” experiment
Look at image in phone
Image in phone about cell layers. Determine the letters
a- upper cuticle b- upper epidermis c-xylem d- pholem e- palisade mesophyll f- spongy mesophyll g- guard cells h- stoma i- lower epidermis j- lower cuticle
How do we know that the gas produced during the “oxygen is produced in photos.” experiment is actually oxygen? Explain
Glowing splint test
Light a match and blow it off
If when the match is introduced in the test tube it turn on, it is oxygen
Limiting factor definition
Factor or aspect of the experiment in short supply that restricts a proccess
Rate definition
Something divided time
How do we usually measure the rate of photosynthesis?
Inverted measuring cylinder filled with water
Measure the volume of oxygen produced during a GIVEN TIME
Look at image in phone. This graph shows light intensity on the rate of photos. From what to what point is light intensity the limiting factor?
From A to B
What could be three limiting factors for photos.?
Temperature
CO2 concentration
Light intensity
How does a graph in “temperature on the rate of photos. look like? Explain
It goes up and then down as the warmer you get, more photos. the plant produces. But with too much heat photos. it not produced because stomata close to prevent dehydration and CO2 cannot enter.
Is the more photosynthesis or respiration with bright light? What is the CO2 concentration?
More photos
Low CO2 concentration
Explain the hydrocarbonate indicator solution’s colors
Low CO2: Purple
Middle: Orange
High CO2: yellow
At night, you do the experiment for CO2 concentration. What would be the color of the hydrocarbonate solution?
Yellow
What is an important use for water in experiments?
It absorbs heat so light passes but temperature isn’t affected
