What do scientists mean when they refer to a population?
A. all the organisms in an ecosystem
B. all the species that share similar
anatomical features
C. all the animals that acquire resources
through similar methods
D. all the interbreeding members of a certain
species in an ecosystem

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 zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

How does the human body lever work?