The series of predictable changes that occurs in a community

The series of predictable changes that occurs in a community over time is called
a.climax community.c.population growth.
b.climate change.d.ecological succession.
If a nutrient is in such short supply in an ecosystem that it affects an animal’s growth,the
a.substance is a limiting nutrient.c.ecosystem will not survive.
b.animal becomes a decomposer.d.nutrient leaves the food chain.
The lowest level of environmental complexity that includes living and nonliving factors is the
a.biosphere.c.community.
b.ecosystem.d.biome.
What is the term given to a group of cells that develops from a single original cell?
a.cell culture c.community
b.nutrient solution d.cell fractionation
When individuals in a population reproduce at a constant rate,it is called
a.logistic growth.c.multiple growth.
b.exponential growth.d.growth density.
A mountain can affect climate by
a.absorbing more solar energy at the peak than at the base of the mountain.
b.causing precipitation to fall mostly on one side of the mountain.
c.interfering with air currents and affecting Earth’s rotation.
d.pushing a cool air mass back out over the ocean.
Demographic transition is change from high birthrates and high death rates to
a.a low birthrate and a low death rate.c.exponential growth.
b.indefinite growth.d.a low birthrate and a high death rate.
Protecting an entire ecosystem will ensure that
a.existing parks and reserves will expand.
b.captive breeding programs will succeed.
c.natural habitats and the interactions of many different species will be preserved.
d.governments will set aside land.
An ecological “hot spot” is an area where
a.habitats and species are in the most danger of extinction.
b.hunting is encouraged.
c.habitats and species are healthy.
d.species diversity is too high.
Which is NOT an adaptation that organisms have for living in flowing water?
a.suckers c.hooks
b.tentacles d.streamlined bodies
Each of the following is a density-dependent limiting factor EXCEPT
a.seasonal cycles.c.disease.
b.crowding.d.competition.
Which of the following statements about a compound is true?
a.The physical and chemical properties of a compound are usually the same as those of the elements from which it is formed.
b.The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
c.Only the physical properties of a compound are usually the same as those of the elements from which it is formed.
d.Only the chemical properties of a compound are usually the same as those of the elements from which it is formed.
Cell specialization in multicellular organisms allows cells to
a.perform different functions.c.respond to their environment.
b.reproduce.d.be less complex.

c d b d c b 后面的不想看了= =!