Which of the following comparisons between a phloem companion cell and a B-lymphocyte is correct?
- ABoth cell types have proteins embedded in their cell surface membranes.
- BB-lymphocytes have a spherical nucleus but companion cells do not have a nucleus.
- CCompanion cells always contain chloroplasts, which are not present in B-lymphocytes.
- DNeither B-lymphocytes nor companion cells possess plasmodesmata.