When the bacterium Serratia marcescens is grown on a sterile medium in a petri dish at 30° C, the bacterial colonies are cream colored. When this same bacterium is cultured under identical conditions, except at a temperature of 25° C, the colonies are brick red. This difference in color is most likely due to the a. type of nutrients in the culture medium
b. sterilization of the culture medium
c. effect of temperature on the expression of the gene for color
d. effect of colony size on the synthesis of color pigments

Which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.the framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.the diverse proteins found in and attached to membranes perform many important functions.the kinky tails of some proteins keep the membrane fluid by preventing the component molecules from packing solidly together.membranes include a mosaic, or mix, of carbohydrates embedded in a phospholipid bilayer.

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Explain how scientists use geologic time to determine the age of landforms.