In a marine ecosystem, how is phytoplankton (producers) beneficial to humans?
they feed the organisms such as fish (consumers) that we eat
This biome is dry and very cold. The coldest in the world. The ground is permanently frozen.
Tundra
What is the carrying capacity of an ecosystem?
The number of organisms that the ecosystem can support and all their needs will be met. The line on the graph where it levels out and stays straight.
In what trophic level on the energy pyramid do you find a primary consumer?
the second
If 2 organisms share a burrow to live in. Which type of relationship exists between them.
Mutualism
This biome has a wet and dry season, warm all year and has scattered clumps of trees.
Savanna
What is the role of a producer in an ecosystem?
to use energy from the sun to make food
In this aquatic biome, salt and freshwater mix.
Estuary
Which type of consumer eats both plants and animals?
omnivore
What type of relationship exists if a hawk and a snake both eat mice?
competition (for food)
A marine biome is also called?
salt water, ocean, sea
This biome allows for very little to no growth. Only lichen and moss can survive the harsh environment (cold desert)..
Tundra
What is the difference between a habitat and niche?
Habitat is where the organism lives (gets water, food, shelter, space). Niche is the role the organism plays within their environment (producer, consumer).
In a population graph...you can expect the population of predators to show an increase when the population of prey shows a ________________.
decrease (more predators to eat, less prey available and vise versa)
Name 3 biotic factors in the rainforest.
trees, parrot, snake,
Food chain...grasses-insects-bird-snake-large bird. What would happen if all the insects died out?
The number of birds (what eats the insects) would decrease
In a balanced ecosystem, which trophic level has the highest population? The least?