A sample of milk is tested for its bacterial content in a plate count assay. This sample is diluted in a 1:10 dilution series the tube of a dilution factor (101) is plated in a pour plate. After incubation, the plate has 47 colonies. Calculate the concentration of bacterial cells in the original milk sample. U A

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment