What are some possible impacts of adding or removing a species from an ecosystem?

Which experiment would most likely contain experimental bias

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

Anurse is caring for a 42-year-old client who is scheduled for an amniocentesis during the fifteenth week of gestation because of concerns regarding down syndrome. what other fetal problem does an examination of the amniotic fluid reveal at this time?