12. Last year Steve was shorter than his brother. This year Steve is taller than his brother. What cell process is directly responsible for Steve's growth?

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Dna replication or repair occurs in a cell in all of thw following situations except when