D
Darth
Guest
Sea stars are fierce competitors of marine organisms such as clams and mussels. An ecologist studying an ocean ecosystem performed an experiment in which the sea stars were removed from the ecosystem. After the removal of the sea stars,
A. the ecosystem became more diverse.
B. the size of the ecosystem was reduced.
C. food webs in the ecosystem became more complex.
D. the number of species in the ecosystem was reduced.
Which of the following is common to the carbon cycle, the nitrogen cycle, and the water cycle?
A. The substance is rearranged into different types of molecules as it moves through its cycle.
B. The substance must pass through organisms in order to complete its cycle.
C. The largest reserves of the substance are always in organisms.
D. The substance is required by all living things and is involved in many processes that occur in all living things.
At least half of the world’s species of land organisms live in a
A. tropical rain forest.
B. temperate savanna.
C. tropical desert.
D. temperate forest.
Which two key factors determine the climate of a region?
A. biodiversity and habitats
B. temperature and precipitation
C. soil type and day length
D. organism types and bodies of water
10 points mb
A. the ecosystem became more diverse.
B. the size of the ecosystem was reduced.
C. food webs in the ecosystem became more complex.
D. the number of species in the ecosystem was reduced.
Which of the following is common to the carbon cycle, the nitrogen cycle, and the water cycle?
A. The substance is rearranged into different types of molecules as it moves through its cycle.
B. The substance must pass through organisms in order to complete its cycle.
C. The largest reserves of the substance are always in organisms.
D. The substance is required by all living things and is involved in many processes that occur in all living things.
At least half of the world’s species of land organisms live in a
A. tropical rain forest.
B. temperate savanna.
C. tropical desert.
D. temperate forest.
Which two key factors determine the climate of a region?
A. biodiversity and habitats
B. temperature and precipitation
C. soil type and day length
D. organism types and bodies of water
10 points mb