The table lists organisms and the ways they use their exoskeletons. Organism Use of exoskeleton
snail protects from water loss
ladybug ?
crab protects crab’s internal organs from water environment

Which phrase correctly completes the table?
A. protects animal underwater
B. helps it fly faster
C. protects its softer wings
D. helps frighten predators

The meselson-stahl experiment demonstrated that dna replication is semiconservative. in the figure, semiconservative replication is illustrated by

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

What goes in and out of a cell respiration?