bio 2 Flashcards
(19 cards)
Some plants (such as peas and alfalfa) have bacteria living on their roots and they make the soil rich in phosphorus.
False. Nitrate
The bacteria that turn nitrogen gas into the form of nitrogen that plants can use are called denitrifying bacteria.
False. Nitrogen fixing
The form that nitrogen must be in for plants to use is nitrogen dioxide.
False. Nitrate
The shells of crabs are made mostly of carbon.
True
Water cannot seep down farther than groundwater because of the layer of bedrock.
True
The three fossil fuels are nitrogen, carbon and gas.
coal, oil, gas
Carbon dioxide is returned to the atmosphere through photosynthesis, burning fossil fuels and burning wood products.
False. Cellular respiration.
The carrying capacity of the Earth is estimated to be about 12 billion people.
True
Nitrogen-fixing bacteria and denitrifying bacteria belong to the decomposer group.
True
Plants go through photosynthesis while only animals go through cellular respiration.
False. Both animals and plants.
Where is nitrogen found in all cells?
DNA
What would happen to the nitrogen cycle if all the plants on the Earth were gone?
There wouldn’t be a nitrogen cycle if there’s no plant to keep it going.
Give the name and definition for the ‘dotted line’.
The dotted line in a population graph represents the carrying capacity, which is the maximum number of individuals an environment can sustainably support over time.
Give two limiting factors that work against population increase.
Disease and Lack of resources
Give an example of parasitism.
Worms live in cat/dog stomachs. Gets nutrients instead of cat/dog.
Give an example of a predator-prey relationship.
Predator = Lynx
Prey = Hare
Why don’t the predators overpopulate?
Predators don’t overpopulate because their numbers depend on how much prey is available. If there isn’t enough food, many predators starve or don’t reproduce as much, keeping their population in balance.
Why is it important to not pour chemicals down the drain or use them on lawns?
Drain: Pollutes the water it goes to, damaging the Earth
Lawns: Kills the plants on the lawn, also ruining soil.
Why is it a good idea to talk to plants?
Your voice releases carbon dioxide, which plants use for photosynthesis.
