An organism that can make its own food is called a
The nonliving parts of an ecosystem are called
The number of different species in an area is referred to as its
A group of land ecosystems with similar climates and organisms is called a(n)
Ponds and rivers are two types of
The many overlapping food chains in an ecosystem make up a(n)
Which biome is extremely cold and dry?
If all members of a species disappear from Earth, the species is said to be
The mating of California condors in zoos is an example of
A diagram that shows how much energy is available at each feeding level in an ecosystem is a(n)
Bacteria and fungi are known as
Water vapor turns into droplets of liquid water in the process of
Certain bacteria change nitrogen gas into a usable form in a process called
Setting aside a marsh as a wildlife refuge is an example of the
The part of an ecosystem where an organism lives and feeds is called the organism’s
The deciduous forest biome is typically populated by many grasses, along with a few shrubs and trees.
Organisms that capture the energy of sunlight to make food are called producers.
Producers release the gas oxygen as a product of photosynthesis.
Oak, maple, and beech trees, which lose their leaves each year, are typically found in a boreal forest.
The arrow in a food chain represents the energy.
Describe two roles bacteria play in the nitrogen cycle.
Explain why decomposers are essential to life on Earth.
Explain the difference between a population and a community.