Photosynthesis
Where does the energy for photosynthesis come from?
The sun/light
Look at the image. Which gas will the bubbles contain if the plant is photosynthesising?
Oxygen
Which three elements are contained in NPK fertiliser?
Nitrogen
Phosphorous
Potassium
What are the two main types of farming?
Intensive and organic
Selective breeding choosing parents with desirable __________ in the hopes that these will be passed on to offspring.
Characteristics/traits/genes
What does the waxy cuticle do?
Reduces water loss.
Look at the image. What is the independent variable (the factor changed)?
The distance between the plant and the lamp.
Which nutrient is required for plants to exhibit healthy growth?
Nitrates
Battery farming, using fertilisers and using antibiotics are examples of which type of farming?
Intensive
Give an example of a desirable trait in plants that could be increased with selective breeding.
High crop yield
Better flavour
Disease resistance
Attractive flowers
What is the word equation for photosynthesis?
carbon dioxide + water --> glucose + oxygen
The number of bubbles per minute.
Magnesium is needed for plants to make chlorophyll. What colour would you expect leaves to be if there was a magnesium deficiency?
Yellow
Give an example of organic farming.
Free range farming
Using natural fertilisers
Crop rotation
Give an advantages of selective breeding.
Can grow pest resistant crops
Crops grow bigger/faster
Crops last longer
Can produce foods with health benefits
What colour is chlorophyll and what does it do?
It's green and traps sunlight.
Name two control variables (factors that need to be kept the same throughout the experiment).
Same light source
Same species of pondweed
Same mass of pondweed
Count the bubbles over the same time period
A plant has short roots and stems, small purple leaves and a poor production of fruit. Which nutrient is it lacking?
Phosphorous
Battery farming is described as being efficient. Why is this?
Give a disadvantage of selective breeding.
Smaller gene pool
More vulnerable to disease
Could force small farms out of business
Plants are autotrophic. What does this mean?
They can make their own food.
Give one inaccuracy for this experiment.
Bubbles are different volumes, so it is not a fair measure of gas produced to count them.
Hydroponics is a technique where crops are grown in a mineral solution with no soil. Give two advantages of this.
Can be grown anywhere
Less water needed
Less space needed
No pesticides
Harvesting is easier
It is cleaner
No weeding soil needed
Plants can grow year round if indoors
Give two disadvantages of intensive farming.
Risk of antibiotic resistance
Unethical/cruel treatment of animals
Diseases spread quickly
Poorer quality produce
Describe the process of selective breeding.
Choose desirable traits in the parent plants
Cross these together
From offspring, choose plants with the most desirable traits
Cross these together
Repeat over several generations