What is one event that marks the end of the mesozoic era?
a. origin of birds
b. origin of mammals
c. extinction of dinosaurs
d. extinction of angiosperms

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

The chemical form of energy that is useable by the cell to do work

What in scientific term why the salty popcorn causes this thirst