Which components of phloem tissue work together to transport photosynthetic products to different parts of the plant body?
a. sieve elements and companion cells

b. mesophyll cells and stomata

c. tracheids and vessels

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 field of science did harry hess study?

Aplant may open end close its stomata to prevent excess water loss and maintain