Tropomyosin is a protein found in both skeletal and smooth muscle, but the mRNA produced in each of these is different in composition even though they are transcribed from the same gene. This observation is explained by a mechanism in eukaryotic cells known as .

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above