What term best describes the following organisms: some with tetramembraneous chloroplasts, some with hairy flagellae, some with pseudopods; some with cuplike indentations in the cell membrane?
a) excavata.
b) sar.
c) plantae.
d) unikonta.

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

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Nerve cells are specialized to respond to stimulitrue or false?