9Bd - Growing crops Flashcards
What is competition?
It is when there is competition between organisms that need the same things as eachother.
What is cross-breeding?
It is when there is sexual reproduction between two varieties or breeds.
What is a decomposer?
It is an organism that feeds on dead organisms or animal waste, causing them to decay.
What is a pesticide?
It is a chemical substance that kills pests.
What is a pest?
It is an organism that damages crops.
What is a fungicide?
It is a pesticide that kills fungi.
What is a herbicide?
A pesticide that kills plants - weeds.
What is an insecticide?
A pesticide that kills insects.
What is selective breeding?
It is when a human chooses an organism with a certain characteristic and then breeds more of these organisms.
What is selective herbicide?
It is a herbicide that kills a certain type of plants.
What is variety?
It is a group of plants that has different characteristics from other plants of the same species.
What is yield?
It is the amount of product obtained from a crop.
