question: What needs to happen so that lancelet eggs can navigate in the water themselves?
choices.text: fertilization Seconds and minutes key element speed of movements safe operation calibrated visibility protection
choices.label: A B C D E F G H
fact2: After eggs are fertilized, free-swimming larvae develop.
combinedfact: After lancelet eggs are fertilized, they develop so that they can navigate in the water themselves.
formatted_question: What needs to happen so that lancelet eggs can navigate in the water themselves? (A) fertilization (B) Seconds and minutes (C) key element (D) speed of movements (E) safe operation (F) calibrated (G) visibility (H) protection