What happens to a population when resources are scarce.
The population will decrease.
100
What would happen if a secondary consumer population was removed from a food web.
The tertiary consumer population would decrease while the primary consumer population would increase causing the producer population to decrease.
100
What is artificial selection.
The process by which humans choose specific traits that they want an organism to express and breed them for those traits.
100
What is symbiosis?
A relationship between two organisms of different species.
100
A food web shows an arrow pointing from a grasshopper to a lizard. What does the arrow tell you?
That the lizard is receiving energy from the grasshopper.
200
What happens to a population when resources are abundant.
The population will increase.
200
What will happen if a tertiary consumer is removed from a food web.
The secondary consumer populations will increase and primary consumer populations will decrease causing the producer populations to increase.
200
What changes during natural and artificial selection.
The DNA of the organisms.
200
Two other symbiotic relationships one in which two organisms fight for the same resources and the other where one organism hunts the other organism.
What is competition and predation?
200
A mouse eats 1g of grass. How much of that 1g of matter stays in the ecosystem?
All of it. Matter is neither created nor destroyed, it only changes form.
300
What would happen to a food web if there were unseasonably cold weather.
The plant population would decrease causing the primary consumer population to decrease, which would also cause the secondary and tertiary consumer populations to decrease.
300
What would happen to the populations of hawk, snake, mouse, and grasshopper in a food web if there is an exceptionally good year for grass.
All populations will increased due to an abundance of producers.
300
How natural selection works.
Organisms genetically better at adapting to an ever changing environment will be more likely to survive and pass on their genes. This will make their offspring more likely to survive and pass on their genes as well. Over many generations and thousands of years these small changes cause the organisms to form into a new species.
300
A type of symbiotic relationship where one animal benefits and the other is harmed.
What is parasitism?
300
How the arrows on a food web show the flow of energy from organism to organism.
The arrows point from the source to the consumer. For example, from the producer to the primary consumer, from the primary consumer to the secondary consumer, and from the secondary consumer to the tertiary consumer.
400
Three things that limit the number of plant populations that can grow in an ecosystem.
What is sunlight, water, and minerals from the soil?
400
What will happen to the snake population if the hawk population in a food web decreases.
The snake population will increase due to decreased predation.
400
What is natural selection?
The slow process by which organisms change over generations in order to adapt to their environment.
400
A type of symbiotic relationship where both organisms benefit.
What is mutualism?
400
What is considered a short term environmental impact?
A change in the environment that lasts less than 5 years and does not change the DNA of subsequent generations and that organisms recover quickly from.
500
What would happen to the hawk population in a food chain if there were a drought and all of the grass died.
What is the hawk population will decrease due to the population of mice decreasing because of he lack of grass.
500
What will happen to the snake population in a food web if the grasshopper population dies off.
The mouse population will decrease causing the snake population to decrease.
500
What causes natural selection to take place.
Environmental changes
500
A type of symbiotic relationship where one animal benefits and the other is neither helped or harmed.
What is commensalism?
500
What is considered a long term environmental impact?
A change in the environment that lasts more than 5 years and can cause DNA changes in subsequent generations and even extinction of species.