Which two characteristics do polar and dry climates have in common? high altitude and very cold winters
very cold winters and contrasting seasons
contrasting seasons and very little precipitation
very little precipitation and few, specialized plants

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

Which label correctly identifies what x represents in the concept map?

Achemical that is released by an animal as a signal to other members of the same species is called a pheromone. t or f