What do the polar bears, reindeer, and shrubs that live in a single area make up?
organism
population
community
ecosystem

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water