Imagine a new type of cell was discovered on mars in an organism growing in benzene, a nonpolar liquid. the cell had a lipid bilayer made of phospholipids, but its structure was very different from that of our cell membranes. what might be characteristic features of the phospholipid head groups? 1) the phospholipid head groups would likely bind to each other with covalent bonds that would pack well and not be bulky.2) the phospholipid head groups would likely have equal numbers of positively and negatively charged groups that would pack well and not be bulky.3) the phospholipid head groups would likely have equal numbers of hydroxyl and amino groups that would pack well and not be bulky.4) the phospholipid head groups would likely bind to each other with hydrogen bonding that would pack well and not be bulky.

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

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 cell organelle is the site for photosynthesis? a. chloroplast b. endoplasmic reticulum c. golgi apparatus d. lysosome