Fig. 2

Shells of the foraminifera that lived first in their natural environment and, at a certain stage of growth, were transferred into tanks with Cd2+- or Pb2+-contaminated water. The last 5 to 7 chambers were secreted in Cd2+- or Pb2+-contaminated water. (A) to (D): BSE micrographs depicting an equatorial cut through the shell of A. lessonii ((A), (C)) and A. lobifera ((B), (D)). Inserts in (A) to (D) are SE images of the investigated shells.